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ASM2I9942C-32-ER: 产品描述Low Skew Clock Driver, 9942 Series, 18 True Output(s), 0 Inverted Output(s), PQFP32, 7 X 7 MM, 0.80 MM PITCH, TQFP-32; 产品类别逻辑逻辑; 文件大小427KB，共10页; 制造商ALSC [Alliance Semiconductor Corporation]

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ASM2I9942C-32-ER概述

Low Skew Clock Driver, 9942 Series, 18 True Output(s), 0 Inverted Output(s), PQFP32, 7 X 7 MM, 0.80 MM PITCH, TQFP-32

ASM2I9942C-32-ER规格参数

参数名称	属性值
是否Rohs认证	不符合
零件包装代码	QFP
包装说明	TQFP,
针数	32
Reach Compliance Code	unknown
其他特性	IT CAN ALSO OPERATE WITH 3.3V SUPPLY
系列	9942
输入调节	STANDARD
JESD-30 代码	S-PQFP-G32
JESD-609代码	e0
长度	7 mm
逻辑集成电路类型	LOW SKEW CLOCK DRIVER
功能数量	1
反相输出次数
端子数量	32
实输出次数	18
最高工作温度	85 °C
最低工作温度	-40 °C
输出特性	3-STATE
封装主体材料	PLASTIC/EPOXY
封装代码	TQFP
封装形状	SQUARE
封装形式	FLATPACK, THIN PROFILE
峰值回流温度（摄氏度）	NOT SPECIFIED
传播延迟（tpd）	2.8 ns
认证状态	Not Qualified
Same Edge Skew-Max（tskwd）	0.35 ns
座面最大高度	1.2 mm
最大供电电压 (Vsup)	2.625 V
最小供电电压 (Vsup)	2.375 V
标称供电电压 (Vsup)	2.5 V
表面贴装	YES
温度等级	INDUSTRIAL
端子面层	TIN LEAD
端子形式	GULL WING
端子节距	0.8 mm
端子位置	QUAD
处于峰值回流温度下的最长时间	NOT SPECIFIED
宽度	7 mm
Base Number Matches	1

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May 2005

rev 0.2

Low Voltage 1:18 Clock Distribution Chip

Features

LVCMOS/LVTTL Clock Input

2.5V

LVCMOS

Outputs

for

Pentium

TM*

ASM2I9942C

device ideal for supplying clocks for a high performance

Pentium II

microprocessor based design.

With a low output impedance (≈12Ω), in both the HIGH and

LOW logic states, the output buffers of the ASM2I9942C

are ideal for driving series terminated transmission lines.

With an output impedance of 12Ω, the ASM2I9942C can

drive two series terminated transmission lines from each

output. This capability gives the ASM2I9942C an effective

fanout of 1:36. The ASM2I9942C provides enough copies

of low skew clocks for most high performance synchronous

systems.

The LVCMOS/LVTTL input of the ASM2I9942C provides a

more standard LVCMOS interface. The OE pins will place

the outputs into a high impedance state. The OE pin has an

internal pullup resistor.

The ASM2I9942C is a single supply device. The V

power

pins require either 2.5V or 3.3V. The 32–lead TQFP and

LQFP package is chosen to optimize performance, board

space and cost of the device. The 32–lead TQFP has a

7x7mm

body size with a conservative 0.8mm pin spacing.

Microprocessor Support

150pS Maximum Targeted Output–to–Output Skew

Maximum Output Frequency of 250MHz @ 3.3 V

32–Lead TQFP and LQFP Packaging

Single 3.3V or 2.5V Supply.

Pin and Function compatible to MPC942C

Functional Description

The ASM2I9942C is a 1:18 low voltage clock distribution

chip with 2.5V or 3.3V LVCMOS output capabilities. The

device is offered in two versions; the ASM2I9942C has an

LVCMOS input clock while the ASM2I9942P has an

LVPECL input clock. The 18 outputs are 2.5V or 3.3V

LVCMOS compatible and feature the drive strength to drive

50Ω series or parallel terminated transmission lines. With

output–to–output skews of 200pS, the ASM2I9942C is

ideal as a clock distribution chip for the most demanding of

synchronous systems. The 2.5V outputs also make the

*Pentium II is a trademark of Intel Corporation

Alliance Semiconductor

2575, Augustine Drive

•

Santa Clara, CA

•

Tel: 408.855.4900

•

Fax: 408.855.4999

•

www.alsc.com

Notice: The information in this document is subject to change without notice.

ASM2I9942C-32-ER相似产品对比

	ASM2I9942C-32-ER	ASM2I9942CG-32-ER	ASM2I9942CG-32-ET	ASM2I9942CG-32-LR	ASM2I9942CG-32-LT	ASM2I9942C-32-ET	ASM2I9942C-32-LR	ASM2I9942C-32-LT
描述	Low Skew Clock Driver, 9942 Series, 18 True Output(s), 0 Inverted Output(s), PQFP32, 7 X 7 MM, 0.80 MM PITCH, TQFP-32	Low Skew Clock Driver, 9942 Series, 18 True Output(s), 0 Inverted Output(s), PQFP32, 7 X 7 MM, 0.80 MM PITCH, GREEN, TQFP-32	Low Skew Clock Driver, 9942 Series, 18 True Output(s), 0 Inverted Output(s), PQFP32, 7 X 7 MM, 0.80 MM PITCH, GREEN, TQFP-32	Low Skew Clock Driver, 9942 Series, 18 True Output(s), 0 Inverted Output(s), PQFP32, GREEN, LQFP-32	Low Skew Clock Driver, 9942 Series, 18 True Output(s), 0 Inverted Output(s), PQFP32, GREEN, LQFP-32	Low Skew Clock Driver, 9942 Series, 18 True Output(s), 0 Inverted Output(s), PQFP32, 7 X 7 MM, 0.80 MM PITCH, TQFP-32	Low Skew Clock Driver, 9942 Series, 18 True Output(s), 0 Inverted Output(s), PQFP32, LQFP-32	Low Skew Clock Driver, 9942 Series, 18 True Output(s), 0 Inverted Output(s), PQFP32, LQFP-32
是否Rohs认证	不符合	符合	符合	符合	符合	不符合	不符合	不符合
零件包装代码	QFP	QFP	QFP	QFP	QFP	QFP	QFP	QFP
包装说明	TQFP,	TQFP,	TQFP,	LQFP,	LQFP,	TQFP,	LQFP,	LQFP,
针数	32	32	32	32	32	32	32	32
Reach Compliance Code	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown
其他特性	IT CAN ALSO OPERATE WITH 3.3V SUPPLY	IT CAN ALSO OPERATE WITH 3.3V SUPPLY	IT CAN ALSO OPERATE WITH 3.3V SUPPLY	IT CAN ALSO OPERATE WITH 3.3V SUPPLY	IT CAN ALSO OPERATE WITH 3.3V SUPPLY	IT CAN ALSO OPERATE WITH 3.3V SUPPLY	IT CAN ALSO OPERATE WITH 3.3V SUPPLY	IT CAN ALSO OPERATE WITH 3.3V SUPPLY
系列	9942	9942	9942	9942	9942	9942	9942	9942
输入调节	STANDARD	STANDARD	STANDARD	STANDARD	STANDARD	STANDARD	STANDARD	STANDARD
JESD-30 代码	S-PQFP-G32	S-PQFP-G32	S-PQFP-G32	S-PQFP-G32	S-PQFP-G32	S-PQFP-G32	S-PQFP-G32	S-PQFP-G32
JESD-609代码	e0	e3	e3	e3	e3	e0	e0	e0
长度	7 mm	7 mm	7 mm	7 mm	7 mm	7 mm	7 mm	7 mm
逻辑集成电路类型	LOW SKEW CLOCK DRIVER	LOW SKEW CLOCK DRIVER	LOW SKEW CLOCK DRIVER	LOW SKEW CLOCK DRIVER	LOW SKEW CLOCK DRIVER	LOW SKEW CLOCK DRIVER	LOW SKEW CLOCK DRIVER	LOW SKEW CLOCK DRIVER
功能数量	1	1	1	1	1	1	1	1
端子数量	32	32	32	32	32	32	32	32
实输出次数	18	18	18	18	18	18	18	18
最高工作温度	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C
最低工作温度	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C
输出特性	3-STATE	3-STATE	3-STATE	3-STATE	3-STATE	3-STATE	3-STATE	3-STATE
封装主体材料	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
封装代码	TQFP	TQFP	TQFP	LQFP	LQFP	TQFP	LQFP	LQFP
封装形状	SQUARE	SQUARE	SQUARE	SQUARE	SQUARE	SQUARE	SQUARE	SQUARE
封装形式	FLATPACK, THIN PROFILE	FLATPACK, THIN PROFILE	FLATPACK, THIN PROFILE	FLATPACK, LOW PROFILE	FLATPACK, LOW PROFILE	FLATPACK, THIN PROFILE	FLATPACK, LOW PROFILE	FLATPACK, LOW PROFILE
峰值回流温度（摄氏度）	NOT SPECIFIED	250	250	250	250	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED
传播延迟（tpd）	2.8 ns	2.8 ns	2.8 ns	2.8 ns	2.8 ns	2.8 ns	2.8 ns	2.8 ns
认证状态	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Same Edge Skew-Max（tskwd）	0.35 ns	0.35 ns	0.35 ns	0.35 ns	0.35 ns	0.35 ns	0.35 ns	0.35 ns
座面最大高度	1.2 mm	1.2 mm	1.2 mm	1.6 mm	1.6 mm	1.2 mm	1.6 mm	1.6 mm
最大供电电压 (Vsup)	2.625 V	2.625 V	2.625 V	2.625 V	2.625 V	2.625 V	2.625 V	2.625 V
最小供电电压 (Vsup)	2.375 V	2.375 V	2.375 V	2.375 V	2.375 V	2.375 V	2.375 V	2.375 V
标称供电电压 (Vsup)	2.5 V	2.5 V	2.5 V	2.5 V	2.5 V	2.5 V	2.5 V	2.5 V
表面贴装	YES	YES	YES	YES	YES	YES	YES	YES
温度等级	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
端子面层	TIN LEAD	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	TIN LEAD	TIN LEAD	TIN LEAD
端子形式	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING
端子节距	0.8 mm	0.8 mm	0.8 mm	0.8 mm	0.8 mm	0.8 mm	0.8 mm	0.8 mm
端子位置	QUAD	QUAD	QUAD	QUAD	QUAD	QUAD	QUAD	QUAD
处于峰值回流温度下的最长时间	NOT SPECIFIED	40	40	40	40	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED
宽度	7 mm	7 mm	7 mm	7 mm	7 mm	7 mm	7 mm	7 mm
Base Number Matches	1	1	1	1	1	1	1	1
厂商名称	-	ALSC [Alliance Semiconductor Corporation]	ALSC [Alliance Semiconductor Corporation]	ALSC [Alliance Semiconductor Corporation]	ALSC [Alliance Semiconductor Corporation]	ALSC [Alliance Semiconductor Corporation]	ALSC [Alliance Semiconductor Corporation]	-

ASM2I9942C-32-ER

ASM2I9942C-32-ER概述

ASM2I9942C-32-ER规格参数

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