MSM81C55-5GS-2K Datasheet PDF - OKI Electric Industry

●GENERAL  DESCRIPTION

●The MSM81C55-5 has a 2k-bit static RAM (256 bytes) with parallel I/O ports and a timer.  It uses silicon gate CMOS technology and consumes a standby current of 100 micro ampere, maximum, while the chip is not selected.  Featureing a maximum access time of 400 ns, the MSM81C55-5 can  be used in an MSM80C85AH system without using wait states.  The parallel I/O consists of two 8-bit ports and one 6-bit port (both general purpose). The MSM81C55-5 also contains a 14-bit programmable counter/timer which may be used for sequence-wave generation or terminal count-pulsing.

●FEATURES

●• High speed and low power achieved with silicon gate CMOS technology

●• 256 words x 8bits RAM

●• Single power supply, 3 to 6 V

●• Completely static operation

●• On-chip address latch

●• 8-bit programmable I/O ports (port A and B)

●• TTL Compatible

●• RAM data hold characteristic at 2 V

●• 6-bit programmable I/O port (port C)

●• 14-bit programmable binary counter/timer

●• Multiplexed address/data bus

●• Direct interface with MSM80C85AH

●• 40-pin Plastic DIP (DIP40-P-600-2.54): (Product name: MSM81C55-5RS)

●• 44-pin Plastic QFJ (QFJ44-P-S650-1.27): (Product name: MSM81C55-5JS)

●• 44-pin Plastic QFP (QFP44-P-910-0.80-2K): (Product name: MSM81C55-5GS-2K)