ASM2I3805EG-20-AT datasheet(1/12 Pages) ALSC

Part #	ASM2I3805EG-20-AT

Description	3.3V CMOS Dual 1-To-5 Clock Driver

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Manufacturer	ALSC [Alliance Semiconductor Corporation]

Direct Link	https://www.alliancememory.com

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June 2005

ASM2P3805X

rev 0.2

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.

3.3V CMOS Dual 1-To-5 Clock Driver

Features

Advanced CMOS Technology

Guaranteed low skew < 200pS (max)

Very low propagation delay < 2.5nS (max)

Very low duty cycle distortion < 270pS (max)

Very low CMOS power levels

Operating frequency up to 166MHz

TTL compatible inputs and outputs

Inputs can be driven from 3.3V or 5V components

Two independent output banks with 3-state control

1:5 fanout per bank

ASM2P3805X

Where X =D for 133MHz Operation

X =E for 166MHz Operation

"Heartbeat" monitor output

VCC = 3.3V ± 0.3V

Available in SSOP and QSOP Packages

Block Diagram

Functional Description

The ASM2P3805X is a 3.3V clock driver built using

advanced CMOS technology. The device consists of two

banks of drivers, each with a 1:5 fanout and its own output

enable control. The device has a "heartbeat" monitor for

diagnostics and PLL driving. The MON output is identical to

all other outputs and complies with the output specifications

in this document. The ASM2P3805X offers low capacitance

inputs. The ASM2P3805X is designed for high speed clock

distribution where signal quality and skew are critical. The

ASM2P3805X also allows single point-to-point transmission

line driving in applications such as address distribution,

where one signal must be distributed to multiple receivers

with low skew and high signal quality.

Pin Diagram

OB1 – OB5

INA

INB

OEB

OEA

OA1 – OA5

MON

5

A

S

M

2

P

3

8

0

5

X

VCCB

OB1

OB2

OB3

GNDB

OB4

OB5

MON

OEB

INB

INA

OEA

GNDQ

OA5

OA4

GNDA

OA3

OA2

OA1

VCCA

10

11

9

12

8

13

7

14

6

15

5

16

4

17

3

18

2

19

1

20

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