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ASM2I9940LG-32-ET: 产品描述Low Skew Clock Driver, 9940 Series, 18 True Output(s), 0 Inverted Output(s), CMOS, PQFP32, 7 X 7 MM, 0.80 MM PITCH, GREEN, TQFP-32; 产品类别逻辑逻辑; 文件大小220KB，共13页; 制造商ALSC [Alliance Semiconductor Corporation]; 标准

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ASM2I9940LG-32-ET概述

Low Skew Clock Driver, 9940 Series, 18 True Output(s), 0 Inverted Output(s), CMOS, PQFP32, 7 X 7 MM, 0.80 MM PITCH, GREEN, TQFP-32

ASM2I9940LG-32-ET规格参数

参数名称	属性值
是否Rohs认证	符合
厂商名称	ALSC [Alliance Semiconductor Corporation]
零件包装代码	QFP
包装说明	TQFP, QFP32,.35SQ,32
针数	32
Reach Compliance Code	unknown
其他特性	ALSO OPERATES AT 3.3V SUPPLY
系列	9940
输入调节	DIFFERENTIAL MUX
JESD-30 代码	S-PQFP-G32
JESD-609代码	e3
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
封装主体材料	PLASTIC/EPOXY
封装代码	TQFP
封装等效代码	QFP32,.35SQ,32
封装形状	SQUARE
封装形式	FLATPACK, THIN PROFILE
峰值回流温度（摄氏度）	250
电源	2.5/3.3 V
Prop。Delay @ Nom-Sup	5.2 ns
传播延迟（tpd）	5.2 ns
认证状态	Not Qualified
Same Edge Skew-Max（tskwd）	0.2 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
技术	CMOS
温度等级	INDUSTRIAL
端子面层	MATTE TIN
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	40
宽度	7 mm
Base Number Matches	1

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June 2005

rev 1.0

Low Voltage 1:18 Clock Distribution Chip

Features

ASM2I9940L

With low output impedance (≈20Ω), in both the HIGH and

LVPECL or LVCMOS Clock Input

2.5V LVCMOS Outputs for Pentium II

Microprocessor Support*

150pS Maximum Output-to-Output Skew

Maximum Output Frequency of 250MHz

32 Lead LQFP & TQFP Packaging

Dual or Single Supply Device:

Dual V

Supply Voltage, 3.3V Core and

2.5V Output

Single 3.3V V

Supply Voltage for 3.3V

Outputs

Single 2.5V V

Supply Voltage for 2.5V I/O

Pin and Function compatible to MPC940L,

MPC9109, CY29940 and CY29940-1

LOW logic states, the output buffers of the ASM2I9940L

are ideal for driving series terminated transmission lines.

With a 20Ω output impedance the ASM2I9940L has the

capability of driving two series terminated lines from each

output. This gives the device an effective fanout of 1:36.

The differential LVPECL inputs of the ASM2I9940L allow

the device to interface directly with a LVPECL fanout buffer

to build very wide clock fanout trees or to couple to a high

frequency clock source. The LVCMOS input provides a

more standard interface for applications requiring only a

single clock distribution chip at relatively low frequencies. In

addition, the two clock sources can be used to provide for a

test clock interface as well as the primary system clock. A

logic HIGH on the LVCMOS_CLK_Sel pin will select the

LVCMOS level clock input. All inputs of the ASM2I9940L

have internal

pullup/pulldown resistor, so they can be left

open if unused.

The ASM2I9940L is a single or dual supply device. The

device power supply offers a high degree of flexibility. The

device can operate with a 3.3V core and 3.3V output, a

3.3V core and 2.5V outputs as well as a 2.5V core and

2.5V outputs. The 32-lead LQFP and TQFP Packages

were chosen to optimize performance, board space and

cost of the device. The 32-lead LQFP and TQFP Packages

have a 7x7mm

body size with conservative 0.8mm pin

spacing.

Functional Description

The ASM2I9940L is a 1:18 low Voltage Clock distribution

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

device features the capability to select either a differential

LVPECL or LVCMOS compatible input. 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 150pS,

the ASM2I9940L is ideal as a clock distribution chip for the

most demanding of Synchronous systems. The 2.5V

outputs also make the device ideal for supplying clocks for

a high performance microprocessor based design.

* 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.

ASM2I9940LG-32-ET相似产品对比

	ASM2I9940LG-32-ET	ASM2I9940L-32-LR	ASM2I9940L-32-ET	ASM2I9940L-32-LT	ASM2I9940LG-32-ER	ASM2I9940LG-32-LR	ASM2I9940LG-32-LT	ASM2I9940L-32-ER
描述	Low Skew Clock Driver, 9940 Series, 18 True Output(s), 0 Inverted Output(s), CMOS, PQFP32, 7 X 7 MM, 0.80 MM PITCH, GREEN, TQFP-32	Low Skew Clock Driver, 9940 Series, 18 True Output(s), 0 Inverted Output(s), CMOS, PQFP32, 7 X 7 MM, 0.80 MM PITCH, LQFP-32	Low Skew Clock Driver, 9940 Series, 18 True Output(s), 0 Inverted Output(s), CMOS, PQFP32, 7 X 7 MM, 0.80 MM PITCH, TQFP-32	Low Skew Clock Driver, 9940 Series, 18 True Output(s), 0 Inverted Output(s), CMOS, PQFP32, 7 X 7 MM, 0.80 MM PITCH, LQFP-32	Low Skew Clock Driver, 9940 Series, 18 True Output(s), 0 Inverted Output(s), CMOS, PQFP32, 7 X 7 MM, 0.80 MM PITCH, GREEN, TQFP-32	Low Skew Clock Driver, 9940 Series, 18 True Output(s), 0 Inverted Output(s), CMOS, PQFP32, 7 X 7 MM, 0.80 MM PITCH, GREEN, LQFP-32	Low Skew Clock Driver, 9940 Series, 18 True Output(s), 0 Inverted Output(s), CMOS, PQFP32, 7 X 7 MM, 0.80 MM PITCH, GREEN, LQFP-32	Low Skew Clock Driver, 9940 Series, 18 True Output(s), 0 Inverted Output(s), CMOS, PQFP32, 7 X 7 MM, 0.80 MM PITCH, TQFP-32
是否Rohs认证	符合	不符合	不符合	不符合	符合	符合	符合	不符合
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]	ALSC [Alliance Semiconductor Corporation]	ALSC [Alliance Semiconductor Corporation]
零件包装代码	QFP	QFP	QFP	QFP	QFP	QFP	QFP	QFP
包装说明	TQFP, QFP32,.35SQ,32	LQFP, QFP32,.35SQ,32	TQFP, QFP32,.35SQ,32	LQFP, QFP32,.35SQ,32	TQFP, QFP32,.35SQ,32	LQFP, QFP32,.35SQ,32	LQFP, QFP32,.35SQ,32	TQFP, QFP32,.35SQ,32
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	ALSO OPERATES AT 3.3V SUPPLY	ALSO OPERATES AT 3.3V SUPPLY	ALSO OPERATES AT 3.3V SUPPLY	ALSO OPERATES AT 3.3V SUPPLY	ALSO OPERATES AT 3.3V SUPPLY	ALSO OPERATES AT 3.3V SUPPLY	ALSO OPERATES AT 3.3V SUPPLY	ALSO OPERATES AT 3.3V SUPPLY
系列	9940	9940	9940	9940	9940	9940	9940	9940
输入调节	DIFFERENTIAL MUX	DIFFERENTIAL MUX	DIFFERENTIAL MUX	DIFFERENTIAL MUX	DIFFERENTIAL MUX	DIFFERENTIAL MUX	DIFFERENTIAL MUX	DIFFERENTIAL MUX
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	e3	e0	e0	e0	e3	e3	e3	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
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	LQFP	TQFP	LQFP	TQFP	LQFP	LQFP	TQFP
封装等效代码	QFP32,.35SQ,32	QFP32,.35SQ,32	QFP32,.35SQ,32	QFP32,.35SQ,32	QFP32,.35SQ,32	QFP32,.35SQ,32	QFP32,.35SQ,32	QFP32,.35SQ,32
封装形状	SQUARE	SQUARE	SQUARE	SQUARE	SQUARE	SQUARE	SQUARE	SQUARE
封装形式	FLATPACK, THIN PROFILE	FLATPACK, LOW PROFILE	FLATPACK, THIN PROFILE	FLATPACK, LOW PROFILE	FLATPACK, THIN PROFILE	FLATPACK, LOW PROFILE	FLATPACK, LOW PROFILE	FLATPACK, THIN PROFILE
峰值回流温度（摄氏度）	250	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	250	250	250	NOT SPECIFIED
电源	2.5/3.3 V	2.5/3.3 V	2.5/3.3 V	2.5/3.3 V	2.5/3.3 V	2.5/3.3 V	2.5/3.3 V	2.5/3.3 V
Prop。Delay @ Nom-Sup	5.2 ns	5.2 ns	5.2 ns	5.2 ns	5.2 ns	5.2 ns	5.2 ns	5.2 ns
传播延迟（tpd）	5.2 ns	5.2 ns	5.2 ns	5.2 ns	5.2 ns	5.2 ns	5.2 ns	5.2 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）	0.2 ns	0.2 ns	0.2 ns	0.2 ns	0.2 ns	0.2 ns	0.2 ns	0.2 ns
座面最大高度	1.2 mm	1.6 mm	1.2 mm	1.6 mm	1.2 mm	1.6 mm	1.6 mm	1.2 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
技术	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS
温度等级	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
端子面层	MATTE TIN	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	MATTE TIN	MATTE TIN	MATTE TIN	Tin/Lead (Sn/Pb)
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	40	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	40	40	40	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

ASM2I9940LG-32-ET

ASM2I9940LG-32-ET概述

ASM2I9940LG-32-ET规格参数

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ASM2I9940LG-32-ET相似产品对比

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