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M66221FP - 256 x 9-BIT MAIL-BOX

General Description

The M66221 is a mail box that incorporates a complete CMOS shared memory cell of 256 × 9-bit configuration using high-performance silicon gate CMOS process technology, and is equipped with two access ports of A and B.

Key Features

  • Memory configuration of 256 × 9 bits High-speed access, address access time 40ns (typ. ) Complete asynchronous accessibility from ports A and B Completely static operation Built-in port arbitration function Low power dissipation CMOS design 5V single power supply Not Ready output pin is provided (open drain output) TTL direct-coupled I/O 3-state output for I/O pins. M66221SP.

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Other Datasheets by Mitsubishi Electric

Part Number Description
M66221SP 256 x 9-BIT MAIL-BOX
M66220FP 256 x 8-BIT MAIL-BOX
M66220SP 256 x 8-BIT MAIL-BOX
M66222FP 128 x 8-BIT x 2 MAIL-BOX
M66222SP 128 x 8-BIT x 2 MAIL-BOX

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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MITSUBISHI MITSUBISHI 〈DIGITAL 〈DIGITAL ASSP ASSP 〉 〉 M66221SP/FP M66221SP/FP × 9-BIT MAIL-BOX 256256 × 9-BIT MAIL-BOX DESCRIPTION The M66221 is a mail box that incorporates a complete CMOS shared memory cell of 256 × 9-bit configuration using high-performance silicon gate CMOS process technology, and is equipped with two access ports of A and B. Access ports A and B are equipped with independent addresses CS, WE and OE control pins and I/O pins to allow independent and asynchronous read/write operations from/to shared memory individually. This product also incorporates a port adjustment arbitration function in address contention from both ports.