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CY7C149 Datasheet (CY7C148 / CY7C149) 1K x 4 Static RAM

Manufacturer: Cypress (now Infineon)

Download the CY7C149 datasheet PDF. This datasheet also includes the CY7C148 variant, as both parts are published together in a single manufacturer document.

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Note: The manufacturer provides a single datasheet file (CY7C148_CypressSemiconductor.pdf) that lists specifications for multiple related part numbers.

General Description

The CY7C148 and CY7C149 are high-performance CMOS static RAMs organized as 1024 by 4 bits.

Easy memory expan- Logic Block Diagram Pin Configurations DIP Top View A6 A5 A4 A3 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 VCC A7 A8 A9 I/O 0 I/O 1 I/O 2 I/O 3 WE C148–2 A5 A6 V CC A7 INPUTBUFFER A9 A8 A7 A6 A5 A4 A0 A1 A2 SENSE AMP ROW DECODER I/O0 I/O1 I/O2 I/O3 CS CS GND 64 x 64 ARRAY LCC Top View 2 1 1817 3 16 4 15 5 14 13 6 12 7 8 9 1011 CS GND WE I/0 3 COLUMN DECODER POWER DOWN (7C148) WE C148–1 A3 A2 A1 A0 A4 A13 A10 A11 A12 A8 A9 I/O 0 I/O 1 I/O2 C148–3 Selection Guide 7C148−25 Maximum Access Time (ns) Maximum Operating Current (mA) Maximum Standby Current (mA) Commer

Overview

CY7C148 CY7C149 1Kx4 Static RAM.

Key Features

  • Automatic power-down when deselected (7C148) CMOS for optimum speed/power 25-ns access time Low active power.
  • 440 mW (commercial) sion is provided by an active LOW chip select (CS) input and three-state outputs. The CY7C148 remains in a low-power mode as long as the device remains unselected; i. e. , (CS) is HIGH, thus reducing the average power requirements of the device. The chip select (CS) of the CY7C149 does not affect the power dissipation of.

More Datasheets from Cypress (now Infineon)

Part Number Description
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CY7C141 1K x 8 Dual-Port Static RAM
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CY7C1411JV18 (CY7C14xxJV18) 36-Mbit QDR-II SRAM 4-Word Burst Architecture
CY7C1411KV18 36-Mbit QDR II SRAM Four-Word Burst Architecture