Datasheet > CY7C0851V25

CY7C0851V25

更新时间： 2024-11-07 21:21:15

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
6页	193K
描述
SRAM

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技术参数
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CY7C0851V25 技术参数

生命周期：	Active	包装说明：	,
Reach Compliance Code：	compliant	风险等级：	5.8
Base Number Matches：	1

CY7C0851V25 数据手册

851V25

52V25

CY7C0851V25

CY7C0852V25

ADVANCE INFORMATION

2.5V 64K/128K x 36

Sync Dual-Port Static RAM

Features

Functional Description

• True Dual-Ported memory cellsthatallow simultaneous

access of the same memory location

• Sync. Pipelined 4.5 Megabit devices

—64K x 36 organization (CY7C0851V25)

The CY7C0851V25/CY7C0852V25 is a 4.5-Megabit pipelined

synchronous true dual-port Static RAM. This is a high-speed,

low-power 2.5V CMOS dual-port static RAM. Two ports are

provided, permitting independent, simultaneous access for

reads from any location in memory. A particular port can write

to a certain location while the other port is reading that location

simultaneously. The result of writing to the same location by

more than one port at the same time is undefined. Registers

on control, address, and data lines allow for minimal set-up

and hold time.

—128K x 36 organization (CY7C0852V25)

• Pipelined output mode allows fast 100-MHz operation

• 0.18-micron CMOS for optimum speed/power

• High-speed clock to data access: 5 ns (max.)

• 2.5V Low operating power

During a read operation, data is registered for decreased cycle

—Active = 150 mA (typical)

time. Clock to data valid t

= 5 ns. Each port contains a burst

CD2

—Standby = 10 mA (typical)

counter on the input address register. After externally loading

the counter with the initial address the counter will self-incre-

ment the address internally (more details to follow). The inter-

nal write pulse width is independent of the duration of the R/W

input signal. The internal write pulse is self-timed to allow the

shortest possible cycle times.

• HSTL class 1 I/O (0.75 Vref)

• Counter wraparound control

—Internal mask register controls counter wraparound

—Counter-Interrupt flags to indicate wraparound

—Memory Block Retransmit Operation

• Counter readback on address lines

• Mask register readback on address lines

• Interrupt flags for message passing

• Global Master reset

• Width and Depth expansion capabilities

• Dual Chip Enables on both ports for easy depth expan-

sion

A HIGH on CE0 or LOW on CE1 for one clock cycle will power

down the internal circuitry to reduce the static power consump-

tion. One cycle is required with chip enables asserted to reac-

tivate the outputs.

Counter enable inputs are provided to stall the operation of the

address input and utilize the internal address generated by the

internal counter for fast interleaved memory applications. A

port’s burst counter is loaded when the port’s address strobe

(ADS) and (CNTEN) signals are LOW. When the port’s counter

enable (CNTEN) is asserted and the ADS is deasserted, the

address counter will increment on each LOW to HIGH transi-

tion of that port’s clock signal. This will read/write one word

from/into each successive address location until CNTEN is

deasserted. The counter can address the entire memory array

and will loop back to the start. Counter reset (CNTRST) is used

to reset the unmasked portion of the burst counter to 0s. A

counter-mask register is used to control the counter wrap. The

counter and mask register operations are described in more

detail in the following sections.

• Separate byte enables on both ports

• Commercial and Industrial temperature ranges

• IEEE 1149.1 JTAG boundary scan

• 172-ball BGA (1-mm pitch) (15 mm x 15 mm x 0.51 mm)

New features added to the CY7C0851V25/CY7C0852V25 in-

clude: readback of burst-counter internal address value on ad-

dress lines, counter-mask registers to control the counter

wrap-around and counter interrupt (CNTINT) flags, readback

of mask register value on address lines, retransmit functional-

ity, interrupt flags for message passing, JTAG for boundary

scan, and asynchronous Master Reset.

For the most recent information, visit the Cypress web site at www.cypress.com

Cypress Semiconductor Corporation

•

3901 North First Street

•

San Jose

•

CA 95134

•

408-943-2600

October 17, 2000

12 3 4 5 6

中文翻译

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与CY7C0851V25相关器件

型号	品牌	获取价格	描述	数据表
CY7C0852AV	CYPRESS	获取价格	FLEx36TM 3.3V 32K/64K/128K/256K x 36 Synchronous Dual-Port RAM
CY7C0852AV-133AC	CYPRESS	获取价格	FLEx36TM 3.3V 32K/64K/128K/256K x 36 Synchronous Dual-Port RAM
CY7C0852AV-133AI	CYPRESS	获取价格	FLEx36TM 3.3V 32K/64K/128K/256K x 36 Synchronous Dual-Port RAM
CY7C0852AV-133AXC	CYPRESS	获取价格	FLEx36â¢ 3.3 V 32 K / 64 K / 128 K / 256 K Ã
CY7C0852AV-133AXI	CYPRESS	获取价格	FLEx36â¢ 3.3 V 32 K / 64 K / 128 K / 256 K Ã
CY7C0852AV-133BBC	CYPRESS	获取价格	FLEx36TM 3.3V 32K/64K/128K/256K x 36 Synchronous Dual-Port RAM
CY7C0852AV-133BBI	CYPRESS	获取价格	FLEx36TM 3.3V 32K/64K/128K/256K x 36 Synchronous Dual-Port RAM
CY7C0852AV-167AC	CYPRESS	获取价格	FLEx36TM 3.3V 32K/64K/128K/256K x 36 Synchronous Dual-Port RAM
CY7C0852AV-167AXC	CYPRESS	获取价格	FLEx36â¢ 3.3 V 32 K / 64 K / 128 K / 256 K Ã
CY7C0852AV-167BBC	CYPRESS	获取价格	FLEx36TM 3.3V 32K/64K/128K/256K x 36 Synchronous Dual-Port RAM

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