Datasheet > CYM1841AP7-35C

CYM1841AP7-35C

更新时间： 2024-09-17 08:03:43

品牌	Logo	应用领域
赛普拉斯 - CYPRESS		静态存储器
页数	文件大小	规格书
14页	198K
描述
SRAM Module, 256KX32, 35ns, CMOS, PSMA72, PLASTIC, SIMM-72

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CYM1841AP7-35C 数据手册

CYM1841A

CYM1841B

CYM1841C

256K x 32 Static RAM Module

Reading or writing can be executed on individual bytes or any

combination of multiple bytes through proper use of selects.

Features

• High-density 8-megabit SRAM module

Writing to each byte is accomplished when the appropriate

Chip Select (CS) and Write Enable (WE) inputs are both LOW.

Data on the Input/Output pins (I/O) is written into the memory

• 32-bit standard footprint supports densities from 16K

x 32 through 1M x 32

location specified on the address pins (A through A ).

• High-speed CMOS SRAMs

— Access time of 12 ns

Reading the device is accomplished by taking the Chip Select

(CS) LOW while Write Enable (WE) remains HIGH. Under

these conditions, the contents of the memory location speci-

fied on the address pins will appear on the data Input/Output

pins (I/O).

• Low active power

— 5.3W (max.) at 25 ns

• SMD technology

The data input/output pins stay at the high-impedance state

when write enable is LOW or the appropriate chip selects are

HIGH.

• TTL-compatible inputs and outputs

• Low profile

Two pins (PD and PD ) are used to identify module memory

— Max. height of 0.58 in.

• Available in ZIP, SIMM, and angled SIMM footprint

density in applications where alternate versions of the JE-

DEC-standard modules can be interchanged.

• 72-pin SIMM version compatible with 1M x 32

(CYM1851)

The CYM1841A, CYM1841B, and CYM1841C are 100% pin,

package, and electrically identical. The CYM1841A utilizes

corner power and ground SRAMs, the CYM1841B utilizes

256K x 16 SRAMs, the CYM1841C utilizes center power and

ground SRAMs.

Functional Description

The CYM1841A/B/C are high-performance 8-megabit static

RAM modules organized as 256K words by 32 bits. This mod-

ule is constructed from eight 256K x 4 SRAMs (1841A/C) or

256K x 16 SRAMs (1841B) in SOJ packages mounted on an

epoxy laminate board with pins. Four chip selects (CS , CS ,

A 72-pin SIMM is offered for compatibility with the 1M x 32

CYM1851. This version is socket upgradable to the CYM1851.

Both the 64-pin and 72-pin SIMM modules are available with

either tin-lead or 10 micro-inches of gold flash on the edge

contacts.

CS , CS ) are used to independently enable the four bytes.

Logic Block Diagram

PD – GND

PD – OPEN (72-pin only)

A –A

PD – OPEN (72-pin only)

256K x 4

SRAM

256K x 4

SRAM

I/O – I/O

4 7

256K x 4

SRAM

256K x 4

SRAM

I/O – I/O

256K x 4

SRAM

256K x 4

SRAM

I/O – I/O

I/O –I/O

256K x 4

SRAM

256K x 4

SRAM

I/O –I/O

I/O – I/O

1841A–1

Cypress Semiconductor Corporation

•

3901 North First Street

•

San Jose

•

CA 95134

•

408-943-2600

June 13, 2000

12 3 4 5 6 7...14

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与CYM1841AP7-35C相关器件

型号	品牌	获取价格	描述	数据表
CYM1841AP8-15C	CYPRESS	获取价格	SRAM Module, 256KX32, 15ns, CMOS, PSMA72, PLASTIC, SIMM-72
CYM1841AP8-20C	CYPRESS	获取价格	SRAM Module, 256KX32, 20ns, CMOS, PSMA72, PLASTIC, SIMM-72
CYM1841AP8-35C	CYPRESS	获取价格	SRAM Module, 256KX32, 35ns, CMOS, PSMA72, PLASTIC, SIMM-72
CYM1841AP8-45C	CYPRESS	获取价格	SRAM Module, 256KX32, 45ns, CMOS, PSMA72, PLASTIC, SIMM-72
CYM1841APM-12C	CYPRESS	获取价格	SRAM Module, 1MX8, 12ns, CMOS, PSMA64
CYM1841APM-25C	CYPRESS	获取价格	SRAM Module, 256KX32, 25ns, CMOS, PSMA64, PLASTIC, SIMM-64
CYM1841APN-12C	CYPRESS	获取价格	SRAM Module, 1MX8, 12ns, CMOS, PSMA64
CYM1841APN-25C	CYPRESS	获取价格	SRAM Module, 256KX32, 25ns, CMOS, PSMA64, PLASTIC, SIMM-64
CYM1841APN-45C	CYPRESS	获取价格	SRAM Module, 256KX32, 45ns, CMOS, PSMA64, PLASTIC, SIMM-64
CYM1841APR-20C	CYPRESS	获取价格	SRAM Module, 256KX32, 20ns, CMOS, PZMA64, PLASTIC, ZIP-64

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