D81C55HC-2 2k RAM With I/O and Timer ICs

The D81C55HC-2 is 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. Featuring 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:

1.  High speed and low power achieved with silicon gate CMOS technology
2. 256 words x 8bits RAM
3. Single power supply, 3 to 6 V
4. Completely static operation
5. On-chip address latch
6. 8-bit programmable I/O ports (port A and B)
7. TTL Compatible
8. RAM data hold characteristic at 2 V
9. 6-bit programmable I/O port (port C)
10. 14-bit programmable binary counter/timer
11. Multiplexed address/data bus
12. Direct interface with MSM80C85AH
13. 40-pin Plastic DIP (DIP40-P-600-2.54): (Product name: MSM81C55-5RS)
14. 44-pin Plastic QFJ (QFJ44-P-S650-1.27): (Product name: MSM81C55-5JS)
15. 44-pin Plastic QFP (QFP44-P-910-0.80-2K): (Product name: MSM81C55-5GS-2K)

Packing List:

1Pc * D81C55HC-2 2k RAM With I/O and Timer IC