CY CY7C199-25DMB

Mfr. Part

CY7C199-25DMB

Manufacturer

CY Cypress Semiconductor

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Detailed Description

32K x 8-bit high-speed CMOS static RAM

25 ns access time for fast reads and writes

5 V single-supply asynchronous SRAM with TTL or CMOS compatible I O

Standard 28-pin DIP through-hole package for easy drop-in and repair of legacy designs

Typical signals include A0–A14 address, DQ0–DQ7 data, CE chip enable, OE output enable, WE write enable, VCC, and GND

Key Features

32K x 8 organization for simple byte-wide data storage

25 ns access time for responsive memory operations

Single 5 V power supply simplifies power design

Asynchronous operation and tri-state outputs for easy bus interfacing

Low power CMOS technology compared to older NMOS parts

Broad temperature options available by suffix family

Pin compatible with common 62256 71256 style SRAMs

Key Advantages

Fast parallel interface reduces latency compared to serial memories

Mature, proven part used in many industrial and legacy systems

DIP package simplifies prototyping, field service, and through-hole assembly

Straightforward control pins make design-in easy

Wide ecosystem of pin-compatible alternatives ensures long-term support

Packaging

Package type DIP through-hole

Pin count and configuration 28-pin standard SRAM pinout A0–A14 DQ0–DQ7 CE OE WE VCC GND

Body width 0.6 inch 600 mil typical

Pin pitch 2.54 mm 0.1 inch

Typical body length around 35 mm and height around 4–5 mm depending on manufacturer

Material plastic molded DIP body with tin plated leads typical

Thermal characteristics typical θJA around 70–90 C W in still air for DIP packages actual values depend on board and airflow

Electrical properties VCC typically 4.5–5.5 V 25 ns access time TTL CMOS compatible I O tri-state outputs standby retention and low power CMOS process see datasheet for exact limits and currents

Lifecycle

Product family status mature with many variants transitioned over time

Some suffixes may be discontinued or limited availability

Current part CY7C199-25DMB is a legacy high-speed SRAM and availability can vary by region and date

Pin compatible or functional alternatives to consider

- Alliance Memory AS7C256-25PCN 32K x 8 5 V DIP-28 25 ns

- ISSI IS61C256AH-25N 32K x 8 5 V DIP-28 25 ns

- Renesas IDT 71256SA-25 PDIP 32K x 8 5 V 25 ns

- Winbond W24257-25 32K x 8 5 V DIP-28 25 ns variants available

- GSI Technology GS82C256-25 32K x 8 5 V DIP and SOJ options

- Cypress Infineon CY62256 series pin compatible newer low power options note different voltage grades exist verify 3 V vs 5 V

Always verify speed grade voltage range package type and pinout before substitution

If you need exact cross reference or current factory status please contact our sales team via the Y-IC website for the latest information

Key Application Areas

Industrial control and automation PLCs and HMIs

Telecom and networking cards using parallel local memory

Test equipment and instrumentation

Medical and laboratory devices with legacy boards

Automotive service tools and rugged embedded systems

Repair and maintenance of vintage computing and arcade hardware

Prototyping and education where DIP through-hole is preferred

Datasheet

Our website hosts the most authoritative datasheet for CY7C199-25DMB

Download the datasheet on this page to get exact electrical limits timing diagrams pinouts and mechanical drawings

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