Datasheet > IMIZ9974

IMIZ9974

更新时间： 2024-10-27 23:58:39

品牌	Logo	应用领域
其他 - ETC		时钟
页数	文件大小	规格书
7页	87K
描述
Clocks and Buffers

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数据手册

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IMIZ9974 数据手册

Z9974

3.3V, 125-MHz, Multi-Output Zero Delay Buffer

The Z9974 integrates PLL technology for zero delay propaga-

tion from input to output. The PLL feedback is externally avail-

Features

• Output Frequency up to 125 MHz

• Supports PowerPC^®, and Pentium^®processors

• 15 Clock outputs: frequency configurable

• Two Reference clock inputs for dynamic toggling

• Output Three-State control

• Spread spectrum compatible

• 3.3V power supply

• Pin compatible with MPC974

• Industrial temperature range: –40°C to +85°C

• 52-pin TQFP package

able for propagation delay tuning and divide ratio alternatives

as per Table 1.

The Z9974 has three banks of outputs with independent divid-

er stages. These dividers allow the banks to have different

frequencies as per Table 2.

TCLK0 and TCLK1 are selectable input reference clocks and

may be toggled dynamically during operation to provide mod-

ulation and phase shifting designs.

This device includes a Master Reset signal, which disables the

outputs (Hi-Z) mode, and reset all internal digital circuitry (ex-

cluding the PLL).

An Output Enable, OE, input pin is available for disabling the

Qa(0:4), Qb(0:4), and Qc(0:3) outputs and forcing them to

LOW state. All outputs are held LOW with input clock turned

off.

Description

The Z9974 is a low-cost 3.3V zero delay clock driver for

high-speed signal buffering and redistribution.

The designer can select various Input/Output Frequency by

setting fsela, fselb, fselc, fselFB(0:1), and VCO_Sel.

Pin Configuration

52 51 50 49 48 47 46 45 44 43 42 41 40

VSSb

QB1

VSSA

MR#

VDDb

Qb2

fselb

fselc

VSSb

Qb3

PLL_EN

fsela

VDDb

Qb4

Z9974

TClk_Sel

TClk0

TClk1

FB_IN

VSSFB

QFB

VDDFB

VDDI

VDDA

14 15 16 17 18 19 20 21 22 23 24 25 26

Cypress Semiconductor Corporation

Document #: 38-07090 Rev. *C

•

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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与IMIZ9974相关器件

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IMK2-67025L-25	ATMEL	获取价格	Dual-Port SRAM, 8KX16, 25ns, CMOS, PQFP84, 0.050 INCH, MQFP-84
IMK2-67025L-25	TEMIC	获取价格	Dual-Port SRAM, 8KX16, 25ns, CMOS, PQFP84, 0.050 INCH, MQFP-84
IMK2-67025L-30	TEMIC	获取价格	Dual-Port SRAM, 8KX16, 30ns, CMOS, PQFP84, 0.050 INCH, MQFP-84
IMK2-67025L-35	TEMIC	获取价格	Dual-Port SRAM, 8KX16, 35ns, CMOS, PQFP84, 0.050 INCH, MQFP-84
IMK2-67025L-35	ATMEL	获取价格	Dual-Port SRAM, 8KX16, 35ns, CMOS, PQFP84, 0.050 INCH, MQFP-84
IMK2-67025L-45	ATMEL	获取价格	Dual-Port SRAM, 8KX16, 45ns, CMOS, PQFP84, 0.050 INCH, MQFP-84