MSM81C55-5RS

I/O Ports and Timer, 2048-Bit CMOS Static RAM, 256 bytes, 400 ns, 2 V, DIP40

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PartNumber:: MSM81C55-5RS

Brand:: OKI electronic componets - OKI | Pack: DIP | D/C: 08+

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Products Upload time: 2012-05-16

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Product Summary

The MSM81C55-5RS is a 2048-Bit CMOS STATIC RAM. The MSM81C55-5RS has a 2k-bit static RAM (256 bytes) with parallel I/O ports and a timer. The MSM81C55-5RS 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 MSM81C55-5RS 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 MSM81C55-5RS also contains a 14-bit programmable counter/timer which may be used for sequence-wave generation or terminal count-pulsing.

Parametrics

MSM81C55-5RS absolute maximum ratings: (1) Power Supply Voltage (V): –0.5 to +7; (2) Input Voltage (V): –0.5 to VCC +0.5; (3)Output Voltage (V): –0.5 to VCC +0.5; (4)Storage Temperature (°C): –55 to +150; (5)Power Dissipation (Ta = 25°C) (W): 1.0.

Features

MSM81C55-5RS 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).