ASMP5P23S05A datasheet, PDF - EEWORLD Datasheet

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ASMP5P23S05A: Description3.3V SpreadTrak Zero Delay Buffer; File Size187KB，16 Pages; ManufacturerALSC [Alliance Semiconductor Corporation]

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ASMP5P23S05A Overview

3.3V SpreadTrak Zero Delay Buffer

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August 2004

rev 2.0

3.3V

‘SpreadTrak’ Zero Delay Buffer

General Features



10 MHz to 133- MHz operating range, compatible

with CPU and PCI bus frequencies.

Zero input - output propagation delay.

Multiple low-skew outputs.



Output-output skew less than 250 ps.

Device-device skew less than 700 ps.

One input drives 9 outputs, grouped as 4 + 4

+ 1 (ASM5P23S09A).

One input drives 5 outputs (ASM5P23S05A).

ASMP5P23S09A

ASMP5P23S05A

133- MHz frequencies, and has higher drive than the -1

devices. All parts have on-chip PLLs that lock to an input

clock on the REF pin. The PLL feedback is on-chip and is

obtained from the CLKOUT pad.

The ASM5P23S09A has two banks of four outputs each,

which can be controlled by the Select inputs as shown in

the Select Input Decoding Table. If all the output clocks are

not required, Bank B can be three-stated. The select input

also allows the input clock to be directly applied to the

outputs for chip and system testing purposes.

Multiple ASM5P23S09A and ASM5P23S05A devices can

accept the same input clock and distribute it. In this case

the skew between the outputs of the two devices is

guaranteed to be less than 700ps.

All outputs have less than 200 ps of cycle-to-cycle jitter.

0.35µ

CMOS

The input and output propagation delay is guaranteed to be

less than 250 ps, and the output to output skew is

guaranteed to be less than 250ps.

The ASM5P23S09A and the ASM5P23S05A are available

in two different configurations, as shown in the ordering

information table. The ASM5P23SXXA-1 is the base part.

The ASM5P23SXXA-1H is the high drive version of the -1

and its rise and fall times are much faster than -1 part.

packages

Less than 200 ps cycle-to-cycle jitter is compatible

with Pentium based systems.

Test Mode to bypass PLL (ASM5P23S09A only,

refer Select Input Decoding Table).

Available in 16-pin, 150-mil SOIC, 4.4 mm

TSSOP,

and

150-mil

SSOP

(ASM5P23S09A) or in 8-pin, 150-mil SOIC

package (ASM5P23S05A).



3.3V

operation,

advanced

technology.

‘SpreadTrak’.

Functional Description

ASM5P23S09A is a versatile, 3.3V zero-delay buffer

designed to distribute high-speed clocks with Spread

Spectrum capability. It is available in a 16-pin package. The

ASM5P23S05A

the

eight-pin

version

the

ASM5P23S09A. It accepts one reference input and drives

out five low-skew clocks.

The -1H version of the ASM5P23SXXA operates at up to

Block Diagram

REF

PLL

CLKOUT

REF

PLL

MUX

CLKOUT

CLKA1

CLKA2

CLKA3

CLK1

CLK2

CLKA4

CLK3

CLKB1

Select Input

Decoding

CLKB2

CLKB3

CLKB4

CLK4

ASM5P23S09A

ASM5P23S05A

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.

ASMP5P23S05A Related Products

	ASMP5P23S05A	ASMP5P23S09A
Description	3.3V SpreadTrak Zero Delay Buffer	3.3V SpreadTrak Zero Delay Buffer

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