PCK942C

更新时间： 2024-11-13 05:59:51

品牌	Logo	应用领域
恩智浦 - NXP		时钟
页数	文件大小	规格书
11页	62K
描述
Low voltage 1 : 18 clock distribution chip

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PCK942C 数据手册

PCK942C

Low voltage 1 : 18 clock distribution chip

Rev. 01 — 15 February 2006

Product data sheet

1. General description

The PCK942C is a 1 : 18 low voltage clock distribution chip with 2.5 V or 3.3 V LVCMOS

output capabilities. The device is offered in two versions: the PCK942C has an LVCMOS

input clock, while the PCK942P has an LVPECL input clock. The 18 outputs are 2.5 V or

3.3 V LVCMOS compatible and feature the drive strength to drive 50 Ω series or parallel

terminated transmission lines. With output-to-output skews of 200 ps, the PCK942C is

ideal as a clock distribution chip for the most demanding of synchronous systems. The

2.5 V outputs also make the device ideal for supplying clocks for a higher performance

Pentium II microprocessor based design.

With a low output impedance of approximately 12 Ω, in both the HIGH and LOW logic

states, the output buffers of the PCK942C are ideal for driving series terminated

transmission lines. With an output impedance of 12 Ω the PCK942C can drive two series

terminated transmission lines from each output. This capability gives the PCK942C an

effective fan-out of 1 : 36. The PCK942C provides enough copies of low skew clocks for

most high performance synchronous systems.

The LVCMOS/LVTTL input of the PCK942C provides a more standard LVCMOS interface.

The OE pin will place the outputs into a high-impedance state. The OE pin has an internal

pull-up resistor.

The PCK942C is a single supply device. The V_CCpower pins require either 2.5 V or 3.3 V.

The 32-lead LQFP package was chosen to optimize performance, board space, and cost

of the device. The 32-lead LQFP package has a 7 mm × 7 mm body size with a

conservative 0.8 mm pin spacing.

2. Features

■ LVCMOS/LVTTL clock input

■ 2.5 V LVCMOS outputs for Pentium II microprocessor support

■ 150 ps maximum targeted output-to-output skew

■ Maximum output frequency of 250 MHz @ 3.3 V V_CC

■ 32-lead LQFP packaging

■ Single 3.3 V or 2.5 V supply voltage

12 3 4 5 6 7...11

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型号	品牌	获取价格	描述	数据表
PCK942CBD	NXP	获取价格	Low voltage 1 : 18 clock distribution chip
PCK942CBD,128	NXP	获取价格	PCK942CBD
PCK942CBD,157	NXP	获取价格	PCK942CBD
PCK942P	NXP	获取价格	Low voltage 1 : 18 clock distribution chip
PCK942PBD	NXP	获取价格	Low voltage 1 : 18 clock distribution chip
PCK942PBD,128	NXP	获取价格	PCK942PBD
PCK942PBD,151	NXP	获取价格	PCK942PBD
PCK942PBD,157	NXP	获取价格	PCK942PBD
PCK9446	NXP	获取价格	2.5 V and 3.3 V LVCMOS clock fan-out buffer
PCK9446BD	NXP	获取价格	2.5 V and 3.3 V LVCMOS clock fan-out buffer