CY29940AC

更新时间： 2024-09-23 22:25:35

品牌	Logo	应用领域
赛普拉斯 - CYPRESS		时钟
页数	文件大小	规格书
7页	192K
描述
2.5V or 3.3V, 200-MHz, 1:18 Clock Distribution Buffer

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替代型号

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CY29940AC 数据手册

CY29940

2.5V or 3.3V, 200-MHz, 1:18 Clock Distribution Buffer

Features

Description

• 200-MHz clock support

• LVPECL or LVCMOS/LVTTL clock input

• LVCMOS/LVTTL compatible inputs

• 18 clock outputs: drive up to 36 clock lines

• 150 ps max. output-to-output skew

• Dual or single supply operation:

— 3.3V core and 3.3V outputs

The CY29940 is a low-voltage 200-MHz clock distribution buff-

er with the capability to select either a differential LVPECL or

a LVCMOS/LVTTL compatible input clock. The two clock

sources can be used to provide for a test clock as well as the

primary system clock. All other control inputs are LVC-

MOS/LVTTL compatible. The eighteen outputs are 2.5V or

3.3V LVCMOS/LVTTL compatible and can drive 50Ω series or

parallel terminated transmission lines. For series terminated

transmission lines, each output can drive one or two traces

giving the device an effective fanout of 1:36. Low out-

put-to-output skews make the CY29940 an ideal clock distri-

bution buffer for nested clock trees in the most demanding of

synchronous systems.

— 3.3V core and 2.5V outputs

— 2.5V core and 2.5V outputs

• Pin compatible with MPC940L, MPC9109

• Available in Commercial and Industrial temperature

• 32-pin LQFP package

Block Diagram

Pin Configuration

VDD

VDDC

PECL_CLK

PECL_CLK#

VSS

TCLK

VDD

Q0-Q17

TCLK

CY29940 ²¹⁰Q9

TCLK_SEL

PECL_CLK

PECL_CLK#

VDD

TCLK_SEL

Q10

Q11

VSS

VDDC

Cypress Semiconductor Corporation

Document #: 38-07283 Rev. *B

•

3901 North First Street

•

San Jose

•

CA 95134

•

408-943-2600

Revised December 21, 2002

12 3 4 5 6 7

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CY29940AC 替代型号

型号	品牌	替代类型	描述	数据表
83940DY-01LF	IDT	功能相似	Low Skew, 1-to-18 LVPECL-TO-LVCMOS / LVTTL Fanout Buffer
MPC940LAC	IDT	功能相似	LOW VOLTAGE 1:18 CLOCK DISTRIBUTION CHIP
CY29940AXCT	CYPRESS	功能相似	2.5V or 3.3V, 200-MHz, 1:18 Clock Distribution Buffer

与CY29940AC相关器件

型号	品牌	获取价格	描述	数据表
CY29940AC-1	CYPRESS	获取价格	2.5V or 3.3V, 200-MHz 1:18 Clock Distribution Buffer
CY29940AC-1T	CYPRESS	获取价格	2.5V or 3.3V, 200-MHz 1:18 Clock Distribution Buffer
CY29940ACT	CYPRESS	获取价格	2.5V or 3.3V, 200-MHz, 1:18 Clock Distribution Buffer
CY29940AI	CYPRESS	获取价格	2.5V or 3.3V, 200-MHz, 1:18 Clock Distribution Buffer
CY29940AI-1	CYPRESS	获取价格	2.5V or 3.3V, 200-MHz 1:18 Clock Distribution Buffer
CY29940AI-1T	CYPRESS	获取价格	2.5V or 3.3V, 200-MHz 1:18 Clock Distribution Buffer
CY29940AIT	CYPRESS	获取价格	2.5V or 3.3V, 200-MHz, 1:18 Clock Distribution Buffer
CY29940AXC	CYPRESS	获取价格	2.5V or 3.3V, 200-MHz, 1:18 Clock Distribution Buffer
CY29940AXCT	CYPRESS	获取价格	2.5V or 3.3V, 200-MHz, 1:18 Clock Distribution Buffer
CY29940AXI	CYPRESS	获取价格	2.5V or 3.3V, 200-MHz, 1:18 Clock Distribution Buffer