Static RAM Memory

Parallel

• Hitachi HM62256 distributed by Jameco
• Toshiba TC551001 128K Byte distributed by Digikey
• ST M68Z128 1Mb (x8), 70ns, 5V Low Power SRAM TSOP32 type I and lots of others at
  • http://us.st.com/stonline/prodpres/memory/selector/mpge_a41.htm
• The SGS M48T02 is a TimeKeeper RAM that has 2 kBytes of RAM, RTC, and battery on the chip

Sequential

• IDT 5V Sequential Access - Random Access Memory (SARAM) (4Kx16)
• Mitsubishi 5120 5120 x 8-bit Line Memory (FIFO/LIFO)
• see also
  • http://www.teleport.com/~thandley/Wilbure.htm SRAM address generator using a Lattice ispLSI1016 CPLD
  • sram161 SRAM Addressing using 74*161's
  • http://www.waferscale.com/ FLASH EEPROM and SRAM (and PDL and PMU and Security and IO and ISP) on one chip .Sadly, http://www.waferscale.com/ appears to point to a porn site now.

Serial

• Dallis Semiconductor has from 256 Bytes to 8K Bytes of 1 wire interface memory
• Microchip 24LC16B see: http://www.shm.monash.edu.au/~r.kreymborg/code.html (cached 20000110)
• Phillips PCF8570 256 x 8-bit static low-voltage RAM with I²C-bus interface
• Solutions Cubed RamPack B see: http://www.solutions-cubed.com/rampack_main.htm
• ST MK41T56 512B (64 X 8) SERIAL ACCESS TIMEKEEPER SRAM
• Ramtron 8kx8 serial FRAM
• Alesis AL3101/AL3102 "serial ram" / DSP chip is available from http://www.alesis-semi.com but most of the info needed for useing them seems to have been compiled by Graeme Zimmer at http://www.users.bigpond.com/gzimmer/AleWeb/Steps/default.html
  Archive:
  • PICList post "Serial ram (with lots of smarts!)"
• OKI  "Serial voice register" series if 1 bit data registers: MSM6685 (8Mx1), MSM6389C (1Mx1, $12). Internal address counter provides continuous data stream presetable in 1k blocks.
• see also: SPI Serial Memory

Bus contention

There is a thin (1.5mm) SMT one inside the Gameboy camera. It measures 8mm x 15mm (inc pins), it's 128kB x 8 and the part number is Sharp 52CV1000SF85LL.

See also:

• Hitachi semiconductor
• Toshiba America Electronic Components (sucks)
• Toshiba Semiconductors Japan (excellent)

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