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VITESSE

SEMICONDUCTOR CORPORATION

Preliminary Datasheet

VSC6424

Features

鈥?Multiplex or Demultiplex Operation

鈥?Selectable Shift Register Length

鈥?500Mb/s Operation using internal timing

鈥?250Mb/s Operation using external timing

鈥?Functional Replacement for Bt424

鈥?External ECL Reference Voltage (-1.32 V)

500 Mb/s Video

Shift Register IC

鈥?ECL and TTL I/Os: ECL for high-speed interface,

TTL for low-speed interface

鈥?Power Supplies: +3.3V and -2V @ 2.7 Watts (Max.)

鈥?Commercial (0

o

to +70

o

C) Temperature Range

鈥?Package: 14mm x 20mm 128 PQFP

General Description

The VSC6424 is a 500Mb/s video shift register IC that is based on a 40-bit user-configured shift register.

The shift register may be used either as a multiplexer (parallel in, serial out) or as a demultiplexer (serial in, par-

allel out). The VSC6424 can be configured into 8 5-bit, 8 4-bit, 5 8-bit, 4 10-bit, 2 16-bit, 2 20-bit, 1 32-bit, or 1

40-bit shift register.

VSC6424 Functional Block Diagram

ON

E

HBLANK

VBLANK

A<0:4>

AEN/RETIME

(ECL)

5

SIN

40

Input

Latch

(TTL)

40

40

M

UX

8

DOUT<0:7>

High

Speed

Interface

(ECL)

SB<0:39>

Low

Speed

Interface

(TTL)

40-bit

Register

10

DE-

MUX

10

Shift

CLKOUT

Timing Control

S<0:2>

MODE

INT/EXTN

OPS

LLDN

SEN/DIVC

SLDN/SYNC

3

DIN<0:9>

(TTL)

CLK

(ECL)

Clock

Generator

3

Phase

R

otation

CLKE

(ECL)

CLKT

(TTL)

SP<0:2>

G52236-0, Rev 3.0

7/13/99

漏

VITESSE

SEMICONDUCTOR CORPORATION

741 Calle Plano, Camarillo, CA 93012 鈥?805/388-3700 鈥?FAX: 805/987-5896

Page 1

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