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20pcs 6" Silicon Wafers With Iconic Designs From Dallas Semiconductor Free Ship

US $199.00

Washington, District Of Columbia, United States
Mar 5th

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20 pcs, 6 inches silicon wafers with iconic designs from Dallas Semiconductor You are purchasing a lot of 20 pieces of 6 inches silicon wafers made by Dallas Semiconductor. These represent a great example of semiconductor manufacturing technology from 1987–2000 and makes for great educational, collection and display item. Many of the wafers will produce shiny, multicolored rainbow reflection with light, like a CD. Each of the wafers are individual, and feature an iconic design from Dallas Semiconductor, showcasing Microcontrollers, Static RAM, EEPROM, Analog, Mixed Signal, Temperature sensing and 1-Wire interface technology. The wafers lot will come packaged in a special wafer storage plastic case that will keep them safe and dust-free. Each wafer is separated by a piece of polymer-paper sheet to avoid scratches. Shipping, handling and return Payment is due within seven days of auction end. Free shipping is included in the buy it now price using USPS registered mail to the lower 48 states. If you do not live in the United States, I will gladly ship the wafer lot internationally at cost (the package is shipped from Washington DC). Please, contact me before purchasing so that I can get back to you with a shipping quote. Shipping will be done within one business day of receiving payment for the purchase. The lot is sold as is, non functioning for educational purposes only. The wafers may exhibit a few minor blemishes or scratches from handling, but I will guarantee that they will look great. If for some reason you are not pleased with your purchase please contact me, I will work with you to solve the problem, or accept a return of the item on the day of arrival without restocking fee (return shipping at your expense). The surface of the wafers is fragile and should not be touched to avoid scratches. Handling of the wafers is best done by holding them on the rim, as finger prints will easily stain both the top and bottom surface. While quite robust, the wafers can break with very sharp an cutting edges. Thank you very much for looking at my items and I hope you will enjoy owning a part of Dallas Semiconductor history and silicon chip manufacturing technology. About Dallas Semiconductor Corporation Dallas Semiconductor designed and manufactured analog, digital, and mixed-signal integrated circuits. Its specialties included communications products (including T/E and Ethernet products), microcontrollers, battery management, thermal sensing and thermal management, non-volatile RAM, microprocessor supervisors, delay lines, silicon oscillators, digital potentiometers, real-time clocks, temperature-compensated crystal oscillators (TCXOs). Dallas Semiconductor is especially known for its 1-Wire serial interface products: 1-Wire is a device communications bus system that provides low-speed bidirectional data, signaling, and power over a single signal. One distinctive feature of the bus is the possibility of using only two wires: data and ground. To accomplish this, 1-Wire devices include an 800 pF capacitor to store charge, and to power the device during periods when the data line is active. The 1-Wire devices enabled the Dallas Semiconductor iButton products (also known as the Dallas Key), a mechanical packaging standard that places a 1-Wire component inside a small stainless steel "button" similar to a disk-shaped watch battery. iButtons are connected to 1-Wire bus systems by means of sockets with contacts which touch the "lid" and "base" of the canister. The Dallas, Texas-based company was founded in 1984 and purchased by Maxim Integrated Products in 2001, which kept using the Dallas brand until 2007. The wafers 1 - DS9104 Digital Decoder Ring Wafer description: This wafer feature a Static RAM array designed to be used in a 1-Wire iButton, packaged in a very unusual wearable metal ring. The wafer also has a series of small patterns with various test designs. A 8051 compatible microcontroller core, as found in the DS87C520, was also placed on the test area of the wafer. The copyright date on the DS9104 memory design is 1992. Detailed information from datasheet: The DS9104 Digital Decoder Ring brings jewelry into the information age. In its custom-designed setting it holds a Memory iButton with a unique, 64-bit serial number permanently engraved into the silicon chip inside plus 64 kbits of nonvolatile SRAM for virtually unlimited read and write cycles. Applications of the Digital Decoder Ring include access control to buildings, personal information such as medical records, business card data, private address, telephone list and access control to computers. The memory chip is formatted like a floppy disk and maintains a directory of files for random access. The Java Ring, a ring-mounted iButton with a Java Virtual Machine compatible with the Java Card 2.0 specification within, was given to attendees of the 1998 JavaOne conference. 2 - DS4802 Micropower dual Op-Amp Wafer description: Dallas Semiconductor also produced various analog designs including operational amplifiers. This very small die is a dual op-amp designed for low power applications. The design is copyrighted 1999 as written on the die. Detailed information from datasheet: The DS4802 BiCMOS dual operational amplifier combines low input offset voltage, very low power consumption, rail-to-rail output swing, and excellent DC precision. With a maximum input offset voltage of 0.95 mV, a maximum IDD of 25 ?A/amplifier, and 10 pA typical input bias current, the DS4802 is ideal for measurement, medical, and industrial applications. The DS4802 is also ideal for portable applications with 1.8 volt to 5.5 volt single supply voltage operation and low power consumption. Features: Low Voltage, Micro Power, High Performance, Rail-To-Rail Dual Op-Amp. Very low operating power: 12 ?A typical per amplifier; High output sink/source capability; Supply Voltage Range 1.8 to 5.5V; Rail-to-Rail Output Swing; Input offset voltage: 0.95 mV max. 3 - DS1046 Wafer description: There is no datasheet available on the DS1046 device, so it may have been an unreleased device. The die feature a Dallas Semiconductor logo on the lower left hand corner, with the initials of the design team engineers surimposed. The design is copyrighted Dallas Semiconductor 1993. 4 - Blank wafer Wafer description: This wafer has been polished to an extremely flat surface, and is ready to be used for the chip-making process. It is an example of the raw material, that is a single crystal of 99.9999% pure silicon, being used for semiconductor photolithography. 5 - DS9256 Wafer description: The DS 9256 is one of the older designs from this lot, copyrighted 1987. This design is not documented, so it may have been an unreleased device. It features a large memory array surrounded by several various test patterns. An image of a lynx can be found, above the inscriptions "GEAUX" and "DSC", the latter standing for Dallas Semiconductor Corporation. "I'd rather be modeling" has been written by a member of the design team that likely wanted to work on another project! 6 - DS20B16 / DS20F16 Wafer description: This wafer has two different dies that are undocumented. The DS20B16 is the most common die and is copyrighted 2000, and resemble the DS2016 SRAM also found in this wafer lot. The DS20F16 die is a more complex design copyrighted 1999, and seems to feature a 1-Wire interface device on the top, and a separate unknown device at the bottom. 7 - DS1209C Wafer description: There is no datasheet available on the DS1046, but some pointers could indicate that this device is a 2 wires (I2C) to 3 wires (SPI) serial interface bridge. The die has a Dallas Semiconductor logo and is copyrighted 1991. 8 - Large test pattern 1 Wafer description: This colorful wafer features an array of test patterns used to verify the effectiveness of the manufacturing process. A series of eight test arrays are visible, labelled Array 1-8 and with the following part numbers: C90E21A, C90E212A, C90E213A, C90E214A. The wafer is copyrighted 2001. 9 - Large test pattern 2 Wafer description: This colorful wafer is a variation of the previous one, and adds to the test area a DS2016 SRAM array. Some writing allows to identify the manufacturing process: "Dallas Semiconductor EEPROM +HV, 0.35µm Process II Technology". It is also copyrighted 2001. 10 - Small test pattern Wafer description: This colorful wafer is a much older test wafer, featuring an array of 20 different test patterns. It is copyrighted 1988. 11 - DS1669 Digital potentiometer Wafer description: Dallas semiconductor was also pioneer in digital potentiometers, using its non-volatile EEPROM memory technology to retain the position of the potentiometer when power is turned off. The die clearly shows the two resistor arrays at the top, as well as the EEPROM cells at the bottom. The die is surrounded by 8 bonding pads for connexion to the DIP8 package frame. The design is copyrighted Dallas Semiconductor 1991 as engraved on the silicon die. Detailed information from datasheet: The DS1669 Dallastat is a digital rheostat or potentiometer. This device provides 64 possible uniform tap points over the entire resistive range. The standard resistive ranges are 10 k, 50 k, and 100 k. The Dallastat can be controlled by either a switch contact closure input or a digital source input such as a CPU. Wiper position is maintained in the absence of power through the use of a EEPROM memory cell array. The EEPROM cell array will withstand more than 50,000 writes. The DS1669 can be configured to operate using a single pushbutton, dual pushbutton or digital source input by varying power-on conditions. Features: Replaces mechanical variable resistors; Electronic interface provided for digital as well as manual control; Wide differential input voltage range between 4.5 and 8V; Wiper position is maintained in the absence of power; Low-cost alternative to mechanical controls; Applications include volume, tone, contrast, brightness, and dimmer control. 12 - DS1820 Digital thermometer with 1-Wire interface Wafer description: Dallas Semiconductor was very well known for its digital serial interface temperature sensors, this specific model was designed to use the Dallas 1-Wire interface. The lower right hand corner of the die clearly show the energy storage capacitor that is used to power the device using the data high level on the 1-Wire interface. The die used for this sensor is small and use a finer, more modern lithographic process than the DS1620 sensor also included in this wafer lot. Detailed information from datasheet: The DS18S20 digital thermometer provides 9-bit Celsius temperature measurements and has an alarm function with nonvolatile user-programmable upper and lower trigger points. The DS18S20 communicates over a 1-Wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor. It has an operating temperature range of –55°C to +125°C and is accurate to ±0.5°C over the range of –10°C to +85°C. In addition, the DS18S20 can derive power directly from the data line (“parasite power”), eliminating the need for an external power supply. Each DS18S20 has a unique 64-bit serial code, which allows multiple DS18S20s to function on the same 1-Wire bus. Thus, it is simple to use one microprocessor to control many DS18S20s distributed over a large area. Applications that can benefit from this feature include HVAC environmental controls, temperature monitoring systems inside buildings, equipment, or machinery, and process monitoring and control systems. Features: Unique 1-Wire Interface Requires Only One Port Pin for Communication; Maximize System Accuracy in Broad Range of Thermal Management Applications; Measures Temperatures from -55°C to +125°C (-67°F to +257°F); ±0.5°C Accuracy from -10°C to +85°C; 9-Bit Resolution; No External Components Required; Parasite Power Mode Requires Only 2 Pins for Operation (DQ and GND); Simplifies Distributed Temperature-Sensing Applications with Multidrop Capability; Each Device Has a Unique 64-Bit Serial Code Stored in On-Board ROM; Flexible User-Definable Nonvolatile (NV) Alarm Settings with Alarm Search Command Identifies Devices with Temperatures Outside Programmed Limits. 13 - DS87C900 8051 based Lock Processor Wafer description: The DS87C900 seems to be an undocumented design, but is referred to as a Lock Processor for 1-Wire systems in a patent. This design is clearly a microcontroller featuring a 8051 compatible core which can be seen in the middle of the die. The same core is used on the DS87C520 microcontroller. The microcontroller core is surrounded by a ROM (left), RAM (lower right) and miscellaneous interface logic. 14 - DS2257 256kb SRAM with parallel interface Wafer description: This wafer represent one of the older lithography process used to manufacture static RAM. The design is copyrighted 1989 as written on the die. Detailed information from datasheet: The DS2257 is a 262,144 bit low power, fully static random access memory organized as 32768 words by 8 bits using CMOS technology. The device operates from a single power supply with a voltage input between 2.7 volts and 5.5 volts. The chip enable input (CE) is used for device selection and can be used in order to achieve the minimum standby current mode which facilitate both battery operate and battery backup applications. The device provides fast access time of 70 ns when operated from a 5 volt power supply input, and also provides relatively good performance of 150 ns access while operating from a 3.0 volt input. The device maintains TTL level inputs and outputs over the input voltage range of 2.7 to 5.5 volts. The DS2257 is most dutiable for low power applications where battery operation or battery backup for nonvolatility are required. Features: Low power CMOS design; Full operation for Vcc = 5.5 to 2.7V; Data retention voltage = 5.5 to 2.0V; Full static operation; TTL compatible inputs and outputs over voltage range of 5.5 to 2.7 volts; Suitable for both battery operate and battery backup applications. 15 - DS32064 Wafer description: This wafer represent one of the older lithography process used to manufacture static RAM. No datasheet is available for this part number. The wafer has been electronically probed and tested, and each nonfunctional die has been marked by a dot of black paint in its center. The design is copyrighted 1988 as written on the die. 16 - Pattern Wafer description: This wafer has an array of 20 large polygonal pattern. Usage of these is not known. 17 - DS2016 16kb SRAM with parallel interface Wafer description: This wafer represent a newer lithography process used to manufacture static RAM. It features a large "Star Trek like" logo and is copyrighted 1998. Detailed information from datasheet: The DS2016 2k x 8 3V/5V Operation Static RAM is a 16,384-bit, low-power, fully static random access memory organized as 2048 words by 8 bits using CMOS technology. The device operates from a single power supply with a voltage input between 2.7V and 5.5V. The chip enable input ( CE ) is used for device selection and can be used in order to achieve the minimum standby current mode, which facilitates both battery operated and battery backup applications. The device provides access times as fast as 100ns when operated from a 5V power supply input and also provides relatively good performance of 250ns access while operating from a 3V input. The device maintains TTL-level inputs and outputs over the input voltage range of 2.7V to 5.5V. The DS2016 is most suitable for low-power applications where battery operation or battery backup for nonvolatility is required. The DS2016 is a JEDEC-standard 2k x 8 SRAM and is pin-compatible with ROM and EPROM of similar density. Features: Low-power CMOS design; Full operation for VCC = 5.5V to 2.7V; Data retention voltage = 5.5V to 2.0V; Full static operation; TTL compatible inputs and outputs over voltage range of 5.5V to 2.7V; Suitable for both battery operated and battery backup applications. 18 - DS1620 Digital thermometer with 3-Wire serial interface Wafer description: Dallas Semiconductor was very well known for its digital serial interface temperature sensors, and this wafer shows how it was implemented. The temperature sensing element is clearly visible on the lower left hand corner of the die and has a little temperature logo engraved on it. On the opposite side, a little padlock logo with the Dallas Semiconductor logo indicates that this product is part of their security line of chips. The lower part of the die feature the non-volatile memory cells used to store the programmable thermostat threshold, and each corners have two pads for wire-bonding to the contacts on the DIP8 package frame. The design is copyrighted Dallas Semiconductor 1999 as engraved on the silicon die. Detailed information from datasheet: The DS1620 Digital Thermometer and Thermostat provides 9–bit temperature readings which indicate the temperature of the device. With three thermal alarm outputs, the DS1620 can also act as a thermostat. THIGH is driven high if the DS1620’s temperature is greater than or equal to a user–defined temperature TH. TLOW is driven high if the DS1620’s temperature is less than or equal to a user–defined temperature TL. TCOM is driven high when the temperature exceeds TH and stays high until the temperature falls below that of TL. User–defined temperature settings are stored in nonvolatile memory, so parts can be programmed prior to insertion in a system, as well as used in standalone applications without a CPU. Temperature settings and temperature readings are all communicated to/from the DS1620 over a simple 3–wire interface. Features: Requires no external components; Supply voltage range covers from 2.7V to 5.5V; Measures temperatures from -55°C to +125°C in 0.5°C increments; Fahrenheit equivalent is -67°F to +257°F in 0.9°F increments; Temperature is read as a 9-bit value; Converts temperature to digital word in 750 ms (max); Thermostatic settings are user-definable and nonvolatile; Data is read from/written via a 3-wire serial interface (CLK, DQ, RST); Applications include thermostatic controls, industrial systems, consumer products, thermometers, or any thermally sensitive system. 19 - DS87C520 8051 compatible, high speed microcontroller Wafer description: The DS87C520 was a Dallas in-house clone of the highly popular Intel 8051 microcontroller, but designed to run much faster. The 8051 compatible core is clearly visible on the lower left hand side of the die, The EPROM array for program storage is on the top, and RAM on upper right. The rest of the circuitry is used for peripherals such as serial interface, timers, and I/O control. The design is copyrighted 1994. Detailed information from datasheet: The DS87C520 EPROM high-speed microcontrollers are fast 8051-compatible microcontrollers. They feature a redesigned processor core without wasted clock and memory cycles. As a result, the devices execute every 8051 instruction between 1.5 and 3 times faster than the original for the same crystal speed. Typical applications will see a speed improvement of 2.5 times using the same code and the same crystal. The DS87C520 offer a maximum crystal speed of 33MHz, resulting in apparent execution speeds of 82.5MHz (approximately 2.5X). The DS87C520 are pin compatible with all three packages of the standard 8051, and include standard resources such as three timer/counters, serial port, and four 8-bit I/O ports. They feature 16kB of EPROM or mask ROM with an extra 1kB of data RAM. Both OTP and windowed packages are available. Besides greater speed, the microcontroller includes a second full hardware serial port, seven additional interrupts, programmable Watchdog Timer, Brownout Monitor, and Power-Fail Reset. The device also provides dual data pointers (DPTRs) to speed block data memory moves. It also can adjust the speed of MOVX data memory access from two to nine machine cycles for flexibility in selecting external memory and peripherals. A new Power Management Mode (PMM) is useful for portable applications. This feature allows software to select a lower speed clock as the main time base. While normal operation has a machine cycle rate of 4 clocks per cycle, the PMM runs the processor at 64 or 1024 clocks per cycle. For example, at 12MHz, standard operation has a machine cycle rate of 3MHz. In Power Management Mode, software can select either 187.5kHz or 11.7kHz machine cycle rate. There is a corresponding reduction in power consumption when the processor runs slower. The EMI reduction feature allows software to select a reduced emission mode. This disables the ALE signal when it is unneeded. 20 - DS2433 4kb EEPROM with 1-Wire interface Wafer description: The DS2433 is another product that combines the EEPROM and 1-Wire leadership of Dallas Semiconductor. The EEPROM array takes most of the die on the left. On the upper right between the two middle pads, the die clearly show the energy storage capacitor that is used to power the device using the data high level on the 1-Wire interface. Detailed information from datasheet: The DS2433 4Kb 1-Wire EEPROM identifies and stores relevant information about the product to which it is associated. This lot or product specific information can be accessed with minimal interface, for example a single port pin of a microcontroller. The DS2433 consists of a factory-lasered registration number that includes a unique 48-bit serial number, an 8-bit CRC, and an 8-bit Family Code (23h) plus 4096 bits of user-programmable EEPROM. The power to read and write the DS2433 is derived entirely from the 1-Wire communication line. The memory is organized as sixteen pages of 256 bits each. The scratchpad is an additional page that acts as a buffer when writing to memory. Data is first written to the scratchpad where it may be read back for verification. A copy scratchpad command will then transfer the data to memory. This process insures data integrity when modifying the memory. The 64-bit registration number provides a guaranteed unique identity which allows for absolute traceability and acts as node address if multiple DS2433s are connected in parallel to form a local network. Data is transferred serially via the 1-Wire protocol which requires only a single data lead and a ground return. The PR-35 and SO packages provide a compact enclosure that allows standard assembly equipment to handle the device easily for attachment to printed circuit boards or wiring. Typical applications include storage of calibration constants, board identification and product revision status. Features: 4096 Bits Electrically Erasable Programmable Read-Only Memory (EEPROM); Unique, Factory-Lasered and Tested 64-Bit Registration Number (8-Bit Family Code + 48-Bit Serial Number + 8-Bit CRC Tester); Assures Absolute Identity Because No Two Parts Are Alike; Built-In Multidrop Controller Ensures Compatibility with Other MicroLAN Products; Memory Partitioned Into Sixteen 256-Bit Pages for Packetizing Data; 256-Bit Scratchpad with Strict Read/Write Protocols Ensures Integrity of Data Transfer; Reduces Control, Address, Data, and Power to a Single Data Pin; Directly Connects to a Single Port Pin of a Microprocessor and Communicates at Up to 16.3kbps; Overdrive Mode Boosts Communication Speed to 142kbps; 8-Bit Family Code Specifies DS2433 Communication Requirements to Reader; Presence Detector Acknowledges When Reader First Applies Voltage.

“Wafers are physically pristine, with possible minor blemish or scratches from handling. The designs on the wafers are not functional and the lot is sold for education purposes only.”

Brand	Dallas Semiconductor
Country/Region of Manufacture	United States