CY7C421-20VCR

更新时间： 2024-09-16 12:58:39

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
页数	文件大小	规格书
17页	607K
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CY7C421-20VCR 数据手册

CY7C419/21/25/29/33256/512/1K/2K/4K

x 9 Asynchronous FIFO

CY7C419/21/25/29/33

256/512/1K/2K/4K x 9 Asynchronous FIFO

Features

Functional Description

■ Asynchronous first-in first-out (FIFO) buffer memories

■ 256 x 9 (CY7C419)

The CY7C419, CY7C420/1, CY7C424/5, CY7C428/9, and

CY7C432/3 are first-in first-out (FIFO) memories offered in

600-mil wide and 300-mil wide packages. There are 256, 512,

1,024, 2,048, and 4,096 words respectively by 9 bits wide. Each

FIFO memory is organized such that the data is read in the same

sequential order that it was written. Full and empty flags are

provided to prevent overrun and underrun. Three additional pins

are also provided to facilitate unlimited expansion in width, depth,

or both. The depth expansion technique steers the control

signals from one device to another in parallel. This eliminates the

serial addition of propagation delays, so that throughput is not

reduced. Data is steered in a similar manner.

■ 512 x 9 (CY7C421)

■ 1K x 9 (CY7C425)

■ 2K x 9 (CY7C429)

■ 4K x 9 (CY7C433)

■ Dual-ported RAM cell

■ High speed 50 MHz read and write independent of depth and

width

The read and write operations may be asynchronous; each can

occur at a rate of 50 MHz. The write operation occurs when the

write (W) signal is LOW. Read occurs when read (R) goes LOW.

The nine data outputs go to the high impedance state when R is

HIGH.

■ Low operating power: I_CC= 35 mA

■ Empty and full flags (Half Full flag in standalone)

■ TTL compatible

A Half Full (HF) output flag that is valid in the standalone and

width expansion configurations is provided. In the depth

expansion configuration, this pin provides the expansion out

(XO) information that is used to tell the next FIFO that it is

activated.

■ Retransmit in standalone

■ Expandable in width

■ PLCC, 7x7 TQFP, SOJ, 300-mil, and 600-mil DIP

■ Pb-free packages available

In the standalone and width expansion configurations, a LOW on

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

data. Read enable (R) and write enable (W) must both be HIGH

during retransmit, and then R is used to access the data.

■ Pin compatible and functionally equivalent to IDT7200,

IDT7201, IDT7202, IDT7203, IDT7204, AM7200, AM7201,

AM7202, AM7203, and AM7204

The CY7C419, CY7C420, CY7C421, CY7C424, CY7C425,

CY7C428, CY7C429, CY7C432, and CY7C433 are fabricated

using an advanced 0.65-micron P-well CMOS technology. Input

ESD protection is greater than 2000V and latch-up is prevented

by careful layout and guard rings.

Logic Block Diagram

Cypress Semiconductor Corporation

Document #: 38-06001 Rev. *C

•

198 Champion Court

•

San Jose, CA 95134-1709

•

408-943-2600

Revised December 09, 2008

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与CY7C421-20VCR相关器件

型号	品牌	获取价格	描述	数据表
CY7C421-20VCT	CYPRESS	获取价格	FIFO, 512X9, 20ns, Asynchronous, CMOS, PDSO28, 0.300 INCH, SOJ-28
CY7C421-20VI	ETC	获取价格	x9 Asynchronous FIFO
CY7C421-20VIT	CYPRESS	获取价格	FIFO, 512X9, 20ns, Asynchronous, CMOS, PDSO28, 0.300 INCH, PLASTIC, SOJ-28
CY7C421-20VXC	CYPRESS	获取价格	256/512/1K/2K/4K x 9 Asynchronous FIFO
CY7C421-20VXCT	CYPRESS	获取价格	FIFO, 512X9, 20ns, Asynchronous, CMOS, PDSO28
CY7C421-25AC	ROCHESTER	获取价格	512X9 OTHER FIFO, 25ns, PQFP32, PLASTIC, TQFP-32
CY7C421-25AC	CYPRESS	获取价格	FIFO, 512X9, 25ns, Asynchronous, CMOS, PQFP32, PLASTIC, TQFP-32
CY7C421-25DC	CYPRESS	获取价格	FIFO, 512X9, 25ns, Asynchronous, CMOS, CDIP28, 0.300 INCH, CERDIP-28
CY7C421-25DI	ETC	获取价格	x9 Asynchronous FIFO
CY7C421-25DMB	CYPRESS	获取价格	256/512/1K/2K/4K x 9 Asynchronous FIFO

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