ICS854057AG IDT, Integrated Device Technology Inc, ICS854057AG Datasheet - Page 8

• Manufacturer Part Number: ICS854057AG
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Multiplexerr

Specifications of ICS854057AG

• Number Of Clock Inputs: 4/2
• Mode Of Operation: Differential
• Output Frequency: >2000MHz
• Output Logic Level: LVDS
• Operating Supply Voltage (min): 2.375V
• Operating Supply Voltage (typ): 2.5V
• Operating Supply Voltage (max): 2.625V
• Package Type: TSSOP
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Signal Type: CML/LVDS/LVPECL/SSTL
• Mounting: Surface Mount
• Pin Count: 20
• Lead Free Status / RoHS Status: Not Compliant

2.5V LVDS D
Figure 1 shows a typical termination for LVDS driver in charac-
teristic impedance of 100
854057AG
2.5V D
To prevent oscillation and to reduce noise, it is recommended to
have pull up and pull down connected to true and complement of
the unused input as shown in Figure 2.
IFFERENTIAL
Integrated
Circuit
Systems, Inc.
RIVER
I
T
NPUT WITH
ERMINATION
differential (50
2.5V
LVDS_Driv er
B
100 Ohm Differiential Transmission Line
F
UILT
A
IGURE
PPLICATION
F
www.icst.com/products/hiperclocks.html
-I
single) transmis-
IGURE
N
1. T
50 T
2.5V
YPICAL
2. U
R1
680
R2
680
ERMINATION
NUSED
PCLK
VT
nPCLK
LVDS D
2.5V
8
I
I
sion line environment. For buffer with multiple LDVS driver, it is
recommended to terminate the unused output.
NFORMATION
NPUT
Receiver
with
Built-In
50 Ohm
RIVER
H
U
R1
100
4:1
ANDLING
NUSED
T
ERMINATION
OR
WITH
I
2:1 LVDS C
NPUT
I
+
-
NTERNAL
H
2.5V
ANDLING
I
LOCK
NPUT
ICS854057
REV. A OCTOBER 29, 2008
M
T
ERMINATION
ULTIPLEXER