Spot sales of D8155HC 2048-Bit Static MOS RAM IC with I/O Ports and Timer DIP-40

Product Descriptions

The 8155(H) and 8156(H) are RAM and 1/O chips to be used in the 8085AH MPU system. The RAM portion is designed with 2K bit static cells organized as 256 x B. They have a maximum access time of 400 ns to permit use with no wait states in 8085AH CPU. The 8155H-2 and 8156H-2 have maximum access times of 330ns for use with the8085AH. The I/O portion consists of three general purpose I/O ports. One of the three ports can be programmed to bestatus pins, thus allowing the other two ports to operate in handshake mode.

A 14-bit programmable counter/timer is also included on chip to provide either a square wave or terminal count pulse for the CPU system depending on timer mode.

Product Features

256 word x 8-bits

Single +5V power supply

Completely static operation

Internal address latch

2 programmable 8-bit I/O ports

1 programmable 6-bit I/O port

Programmable 14-bit binary counter/timer

Multiplexed address and data bus

Product Photos

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