ICS854057 Datasheet, PDF (1/13 Pages) Integrated Circuit Systems – 4:1 OR 2:1 LVDS CLOCK MULTIPLEXER WITH INTERNAL INPUT TERMINATION

Integrated
Circuit
Systems, Inc.
ICS854057
4:1 OR 2:1 LVDS CLOCK MULTIPLEXER
WITH INTERNAL INPUT TERMINATION
GENERAL DESCRIPTION
The ICS854057 is a 4:1 or 2:1 LVDS Clock Mul-
ICS
tiplexer which can operate up to 2GHz and is a
HiPerClockS™ _{member of the HiPerClockS™ family of High Per-}
formance Clock Solutions from ICS. The PCLK,
nPCLK pairs can accept most standard differen-
tial input levels. Internal termination is provided on each dif-
ferential input pair. The ICS854057 operates using a 2.5V sup-
ply voltage. The fully differential architecture and low propa-
gation delay make it ideal for use in high speed multiplexing
applications. The select pins have internal pulldown resistors.
Leaving one input unconnected (pulled to logic low by the in-
ternal resistor) will transform the device into a 2:1 multiplexer.
The SEL1 pin is the most significant bit and the binary num-
ber applied to the select pins will select the same numbered
data input (i.e., 00 selects PCLK0, nPCLK0).
FEATURES
• High speed differential multiplexer.The device can be
configured as either a 4:1 or 2:1 multiplexer
• Single LVDS output
• 4 selectable PCLK, nPCLK inputs with internal termination
• PCLK, nPCLK pairs can accept the following differential
input levels: LVPECL, LVDS, CML, SSTL
• Output frequency: >2GHz
• Part-to-part skew: 200ps (maximum)
• Propagation delay: 800ps (maximum)
• Additive phase jitter, RMS: 66fs (typical)
• 2.5V operating supply
• -40°C to 85°C ambient operating temperature
• Available in both, Standard and RoHS/Lead-Free compliant
packages
BLOCK DIAGRAM
VT0
50 50
PCLK0
nPCLK0
VT1
50 50
PCLK1
nPCLK1
VT2
50 50
PCLK2
nPCLK2
VT3
50 50
PCLK3
nPCLK3
SEL1 Pulldown
SEL0 ^Pulldown
854057AG
PIN ASSIGNMENT
00
01
Q
10
nQ
11
VDD 1
PCLK0 2
VT0 3
nPCLK0 4
SEL1 5
SEL0 6
PCLK1 7
VT1 8
nPCLK1 9
GND 10
20 VDD
19 PCLK3
18 VT3
17 nPCLK3
16 Q
15 nQ
14 PCLK2
13 VT2
12 nPCLK2
11 GND
ICS854057
20-Lead TSSOP
4.40mm x 6.50mm x 0.925mm body package
G Package
Top View
www.icst.com/products/hiperclocks.html
1
REV. A JULY 18, 2005