ICS840-125
125MHZ, LVCMOS/LVTTL
OSCILLATOR REPLACEMENT
Integrated
Circuit
Systems, Inc.
GENERAL DESCRIPTION
FEATURES
The ICS840-125 is a Gigabit Ethernet Oscillator • One LVCMOS/LVTTL output, 15Ω output impedance
ICS
Replacement and
a
member of the
• Crystal oscillator interface designed for 25MHz,
18pF parallel resonant crystal
HiPerClocksTM family of high performance
devices from ICS. The ICS840-125 uses a
25MHz crystal to synthesize 125MHz. The
HiPerClockS™
• Output frequency: 125MHz
ICS840-125 has excellent jitter performance. The
ICS840-125 is packaged in a small 8-pin TSSOP, making
it ideal for use in systems with limited board space.
• Random jitter: 3.7ps (typical)
• Deterministic jitter: 0.1ps (typical)
• 3.3V operating supply
• 0°C to 70°C ambient operating temperature
• Available in both standard and lead-free RoHS-compliant
packages
BLOCK DIAGRAM
PIN ASSIGNMENT
Pullup
OE
VDD
XTAL_OUT
XTAL_IN
OE
nc
1
2
3
4
8
7
6
5
Q
VDDO
GND
25MHz
XTAL_IN
125MHz
Clock
Synthesizer
Q
ICS840-125
8-Lead TSSOP
4.40mm x 3.0mm x 0.925mm package body
G Package
XTAL_OUT
Top View
ICS840-125
8-Lead SOIC
3.90mm x 4.92mm x 1.37mm body package
M Package
Top View
840AG-125
www.icst.com/products/hiperclocks.html
REV.A FEBRUARY 3, 2006
1
ICSI [ INTEGRATED CIRCUIT SOLUTION INC ]
