Datasheet > CY7C4255-25JI

CY7C4255-25JI

更新时间： 2024-09-24 19:30:27

品牌	Logo	应用领域
赛普拉斯 - CYPRESS		时钟先进先出芯片内存集成电路
页数	文件大小	规格书
20页	421K
描述
FIFO, 8KX18, 15ns, Synchronous, CMOS, PQCC68, PLASTIC, LCC-68

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CY7C4255-25JI 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	LCC	包装说明：	PLASTIC, LCC-68
针数：	68	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.32.00.71
风险等级：	5.85	最长访问时间：	15 ns
其他特性：	RETRANSMIT	最大时钟频率 (fCLK)：	40 MHz
周期时间：	25 ns	JESD-30 代码：	S-PQCC-J68
JESD-609代码：	e0	长度：	24.2316 mm
内存密度：	147456 bit	内存集成电路类型：	OTHER FIFO
内存宽度：	18	功能数量：	1
端子数量：	68	字数：	8192 words
字数代码：	8000	工作模式：	SYNCHRONOUS
最高工作温度：	85 °C	最低工作温度：	-40 °C
组织：	8KX18	输出特性：	3-STATE
可输出：	YES	封装主体材料：	PLASTIC/EPOXY
封装代码：	QCCJ	封装等效代码：	LDCC68,1.0SQ
封装形状：	SQUARE	封装形式：	CHIP CARRIER
并行/串行：	PARALLEL	峰值回流温度（摄氏度）：	NOT SPECIFIED
电源：	5 V	认证状态：	Not Qualified
座面最大高度：	5.08 mm	最大待机电流：	0.015 A
子类别：	FIFOs	最大压摆率：	0.05 mA
最大供电电压 (Vsup)：	5.5 V	最小供电电压 (Vsup)：	4.5 V
标称供电电压 (Vsup)：	5 V	表面贴装：	YES
技术：	CMOS	温度等级：	INDUSTRIAL
端子面层：	Tin/Lead (Sn/Pb)	端子形式：	J BEND
端子节距：	1.27 mm	端子位置：	QUAD
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	24.2316 mm
Base Number Matches：	1

CY7C4255-25JI 数据手册

1CY7C4265

fax id: 5413

CY7C4255

CY7C4265

PRELIMINARY

8K/16Kx18 Deep Sync FIFOs

are 18 bits wide and are pin/functionally compatible to the

CY7C42X5 Synchronous FIFO family. The CY7C4255/65 can

be cascaded to increase FIFO depth. Programmable features

include Almost Full/Almost Empty flags. These FIFOs provide

solutions for a wide variety of data buffering needs, including

high-speed data acquisition, multiprocessor interfaces, and commu-

nications buffering.

Features

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

memories

• 8K x 18 (CY7C4255)

• 16K x 18 (CY7C4265)

• 0.5 micron CMOS for optimum speed/power

These FIFOs have 18-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 (WCLK) and a write enable

pin (WEN).

• High-speed 100-MHz operation (10 ns read/write cycle

times)

• Low power — I =45 mA

• Fully asynchronous and simultaneous read and write

operation

• Empty, Full, HalfFull, and programmable Almost Empty

and Almost Full status flags

• TTL compatible

• Retransmit function

When WEN is asserted, data is written into the FIFO on the rising

edge of the WCLK signal. While WEN is held active, data is continu-

ally written into the FIFO on each cycle. The output port is controlled

in a similar manner by a free-running read clock (RCLK) and a read

enable pin (REN). In addition, the CY7C4255/65 have an output

enable pin (OE). The read and write clocks may be tied together for

single-clock operation or the two clocks may be run independently for

asynchronous read/write applications. Clock frequencies up to 100

MHz are achievable.

• 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

Retransmit and Synchronous Almost Full/Almost Empty flag

features are available on these devices.

• Depth Expansion Capability

• 64-pin PLCC and 64-pin TQFP

• Pin-compatible density upgrade to CY7C42X5 family

• Pin-compatible density upgrade to

IDT72205/15/25/35/45

Depth expansion is possible using the cascade input (WXI,

RXI), cascade output (WXO, RXO), and First Load (FL) pins. The

WXO and RXO pins are connected to the WXI and RXI pins of the

next device, and the WXO and RXO pins of the last device should be

connected to the WXI and RXI pins of the first device. The FL pin of

the first device is tied to V and the FL pin of all the remaining devic-

Functional Description

es should be tied to V

The CY7C4255/65 are high-speed, low-power, first-in first-out

(FIFO) memories with clocked read and write interfaces. All

0 – 17

Logic Block Diagram

INPUT

WCLK

WEN

FLAG

PROGRAM

WRITE

CONTROL

FLAG

LOGIC

RAM

PAE

PAF

ARRAY

8K x 18

16K x 18

SMODE

WRITE

READ

POINTER

RESET

LOGIC

FL/RT

THREE–STATE

OUTPUTREGISTER

READ

CONTROL

WXI

WXO/HF

RXI

EXPANSION

LOGIC

0 – 17

RXO

4255–1

RCLK

REN

Cypress Semiconductor Corporation

•

3901 North First Street

•

San Jose

•

CA 95134

•

408-943-2600

July 1995 – Revised November 1996

12 3 4 5 6 7...20

中文翻译

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与CY7C4255-25JI相关器件

型号	品牌	获取价格	描述	数据表
CY7C4255-25JIR	CYPRESS	获取价格	FIFO, 8KX18, Synchronous, CMOS, PQCC68, PLASTIC, LCC-68
CY7C4255-35	CYPRESS	获取价格	8K/16K x 18 Deep Sync FIFOs
CY7C4255-35AC	CYPRESS	获取价格	FIFO, 8KX18, 20ns, Synchronous, CMOS, PQFP64, 14 X 14 MM, 1.40 MM HEIGHT, PLASTIC, TQFP-64
CY7C4255-35AI	CYPRESS	获取价格	FIFO, 8KX18, 20ns, Synchronous, CMOS, PQFP64, 14 X 14 MM, 1.40 MM HEIGHT, PLASTIC, TQFP-64
CY7C4255-35JC	CYPRESS	获取价格	FIFO, 8KX18, 20ns, Synchronous, CMOS, PQCC68, PLASTIC, LCC-68
CY7C4255-35JCR	CYPRESS	获取价格	FIFO, 8KX18, Synchronous, CMOS, PQCC68, PLASTIC, LCC-68
CY7C4255-35JCT	CYPRESS	获取价格	FIFO, 8KX18, 20ns, Synchronous, CMOS, PQCC68, PLASTIC, LCC-68
CY7C4255-35JI	CYPRESS	获取价格	FIFO, 8KX18, 20ns, Synchronous, CMOS, PQCC68, PLASTIC, LCC-68
CY7C4255-35JIR	CYPRESS	获取价格	FIFO, 8KX18, Synchronous, CMOS, PQCC68, PLASTIC, LCC-68
CY7C4255-35JIT	CYPRESS	获取价格	FIFO, 8KX18, 20ns, Synchronous, CMOS, PQCC68, PLASTIC, LCC-68

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