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IDT71256SA20Y

Name: IDT71256SA20Y
Rating: 4.7 (12 reviews)

IC SRAM 256KBIT PARALLEL 28SOJ

製造商
製造商。部分 #IDT71256SA20Y
包 28-BSOJ (0.300, 7.62mm Width)
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規格

Supplier	Renesas Electronics America Inc
Package	Tube
ProductStatus	Obsolete
MemoryType	Volatile
MemoryFormat	SRAM
Technology	SRAM - Asynchronous
MemorySize	256Kb (32K x 8)
MemoryInterface	Parallel
WriteCycleTime-WordPage	20ns
AccessTime	20 ns
Voltage-Supply	4.5V ~ 5.5V
OperatingTemperature	0°C ~ 70°C (TA)
MountingType	Surface Mount
Package/Case	28-BSOJ (0.300, 7.62mm Width)

概述

Description

IDT71256SA20Y is a static RAM (SRAM) device from Integrated Device Technology. It provides 256K × 8 organization (2,097,152 bits) with an 18‑bit address bus (A0–A17) and 8 data I/O lines (D0–D7). It operates from a single 5V supply and the “20” indicates a 20 ns access time. It is an asynchronous SRAM with standard control inputs: CE (chip enable), OE (output enable), and WE (write enable), typically active-low. Outputs are tri-stated when not selected. The part is commonly offered in a 28‑pin package (DIP/SOIC) and is used in applications like caches, buffers, and other high‑speed memory needs in embedded systems. The suffixes (SA20Y) indicate specific family/variant and packaging/temperature options; check the exact datasheet for precise electrical specs and pinout for your lot.

Features

IDT71256SA20Y features (SRAM):
- 256 Kb static RAM, organized as 32K × 8
- Access time: 20 ns
- Single 5V supply
- Three-state outputs
- Fully asynchronous operation (no clock)
- Independent control pins: Chip Enable (CE), Output Enable (OE), Write Enable (WE)
- TTL-compatible input/output levels
- Suitable for generic RAM use in microprocessor systems
- Package: 28-pin plastic package (typical)

Package

IDT71256SA20Y uses a 28‑pin package, typically available as DIP‑28 or SOIC‑28 plastic package.

Pinout

- Pin count: 28 pins (typical package variants)
- Function: 32K × 8-bit static RAM (256 Kb) with asynchronous read/write; address inputs A0–A14; data I/O D0–D7; control pins CE, OE, WE; power GND/Vcc.

Manufacturer

- Manufacturer: Integrated Device Technology, Inc. (IDT)
- Company type: A semiconductor company that designs and manufactures memory and interface integrated circuits (historically a memory/IC supplier; now part of Renesas Electronics).

Application

IDT71256SA20Y is a high-speed static RAM (SRAM). Common applications:
- High-speed CPU caches and working memory
- Video/graphics frame buffers
- DSP buffering and look-up tables
- Embedded systems and microcontroller peripheral buffers
- Networking/telecom data buffers and FIFOs
- Instrumentation and test equipment memory
- Plug-in memory expansion for embedded applications

Equivalent

IDT71256SA20Y is a 32K×8 static RAM. Equivalents include any 32K×8 SRAM (28-pin), e.g. 62256 (generic) and CY62256 (Cypress). Other vendor 32K×8 parts with matching speed/voltage are cross-referenced as well.