VITESSE
SEMICONDUCTOR CORPORATION
Preliminary Datasheet
VSC6424
Features
• Multiplex or Demultiplex Operation
• Selectable Shift Register Length
• 500Mb/s Operation using internal timing
• 250Mb/s Operation using external timing
• Functional Replacement for Bt424
• External ECL Reference Voltage (-1.32 V)
500 Mb/s Video
Shift Register IC
• ECL and TTL I/Os: ECL for high-speed interface,
TTL for low-speed interface
• Power Supplies: +3.3V and -2V @ 2.7 Watts (Max.)
• Commercial (0
o
to +70
o
C) Temperature Range
• 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
©
VITESSE
SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896
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