CY7C451-14JCR

更新时间： 2024-11-24 13:07:15

品牌	Logo	应用领域
赛普拉斯 - CYPRESS		存储内存集成电路先进先出芯片时钟
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24页	354K
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数据手册

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CY7C451-14JCR 数据手册

CY7C451

CY7C453

CY7C454

512x9, 2Kx9, and 4Kx9 Cascadable

Clocked FIFOs with Programmable

and write interfaces. Both FIFOs are 9 bits wide. The

CY7C451 has a 512-word by 9-bit memory array, the

CY7C453 has a 2048-word by 9-bit memory array, and the

CY7C454 has a 4096-word by 9-bit memory array. Devices

can be cascaded to increase FIFO depth. Programmable fea-

tures include Almost Full/Empty flags and generation/checking

of parity. These FIFOs provide solutions for a wide variety of data

buffering needs, including high-speed data acquisition, multiproces-

sor interfaces, and communications buffering.

Features

• High-speed, low-power, first-in first-out (FIFO)

memories

• 512 x 9 (CY7C451)

• 2,048 x 9 (CY7C453)

• 4,096 x 9 (CY7C454)

• 0.65 micron CMOS for optimum speed/power

• High-speed 83-MHz operation (12 ns read/write cycle

time)

Both FIFOs have 9-bit input and output ports that are con-

trolled by separate clock and enable signals. The input port is

controlled by a free-running clock (CKW) and a write enable

pin (ENW). When ENW is asserted, data is written into the FIFO on

the rising edge of the CKW signal. While ENW is held active, data is

continually written into the FIFO on each CKW cycle. The output port

is controlled in a similar manner by a free-running read clock (CKR)

and a read enable pin (ENR). The read (CKR) and write (CKW)

clocks may be tied together for single-clock operation or the two

clocks may be run independently for asynchronous read/write appli-

cations. Clock frequencies up to 83.3 MHz are achievable in the stan-

dalone configuration, and up to 83.3 MHz is achievable when FIFOs

are cascaded for depth expansion.

• Low power — I_CC=70 mA

• Fully asynchronous and simultaneous read and write

operation

• Empty, Full, HalfFull, andprogrammableAlmostEmpty

and Almost Full status flags

• TTL compatible

• Retransmit function

• Parity generation/checking

• Output Enable (OE) pins

• Independent read and write enable pins

• Center power and ground pins for reduced noise

• Supports free-running 50% duty cycle clock inputs

• Width Expansion Capability

Depth expansion is possible using the cascade input (XI) and

cascade output (XO). The XOsignal is connected to the XI of the next

device, and the XO of the last device should be connected to the XI

of the first device. In standalone mode, the input (XI) pin is simply tied

• Depth Expansion Capability

• Available in PLCC packages

to V_SS

In the standalone and width expansion configurations, a LOW

on the retransmit (RT) input causes the FIFOs to retransmit

the data. Read enable (ENR) and the write enable (ENW) must

both be HIGH during the retransmit, and then ENR is used to

access the data.

Functional Description

The CY7C451, CY7C453, and CY7C454 are high-speed,

low-power, first-in first-out (FIFO) memories with clocked read

0– 8

Logic Block Diagram

Pin Configurations

INPUT

PLCC/LCC

Top View

CKW

ENW

D D D D D

2 3 4 5 6

FLAG/PARITY

PROGRAM

1 32 31 30

PARITY

ENW

CKW

FL/RT

WRITE

CONTROL

7C451

7C453

7C454

E/F

PAFE/XO

FLAG

LOGIC

E/F

CKR

ENR

RAM

ARRAY

512x9

2048x9

4096x9

PAFE/XO

READ

POINTER

WRITE

POINTER

/PG/PE

14 15 16 17 1819 20

Q Q Q Q Q Q Q

C451-2

RESET

LOGIC

FL/RT

TRI–STATE

OUTPUT REGISTER

READ

CONTROL

EXPANSION

LOGIC

RETRANSMIT

LOGIC

Q /PG/PE

CKR

ENR

C451-1

0–7,

Cypress Semiconductor Corporation

•

3901 North First Street

•

San Jose

•

CA 95134

•

408-943-2600

Document #: 38-06033 Rev. *A

Revised December 27, 2002

12 3 4 5 6 7...24

中文翻译

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与CY7C451-14JCR相关器件

型号	品牌	获取价格	描述	数据表
CY7C451-14JCT	CYPRESS	获取价格	FIFO, 512X9, 10ns, Synchronous, CMOS, PQCC32, PLASTIC, LCC-32
CY7C451-14JI	CYPRESS	获取价格	512x9 2Kx9 and 4Kx9 Cascadable Clocked FIFOs with Programmable
CY7C451-14JIR	CYPRESS	获取价格	FIFO, 512X9, Synchronous, CMOS, PQCC32, PLASTIC, LCC-32
CY7C451-14JIT	CYPRESS	获取价格	FIFO, 512X9, 10ns, Synchronous, CMOS, PQCC32, PLASTIC, LCC-32
CY7C451-14LC	ETC	获取价格	x9 Synchronous FIFO
CY7C451-20DI	ETC	获取价格	x9 Synchronous FIFO
CY7C451-20JC	CYPRESS	获取价格	512x9 2Kx9 and 4Kx9 Cascadable Clocked FIFOs with Programmable
CY7C451-20JCT	CYPRESS	获取价格	FIFO, 512X9, 15ns, Synchronous, CMOS, PQCC32, PLASTIC, LCC-32
CY7C451-20JI	CYPRESS	获取价格	512x9 2Kx9 and 4Kx9 Cascadable Clocked FIFOs with Programmable
CY7C451-20LC	ETC	获取价格	x9 Synchronous FIFO

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