ICS840-125 Datasheet, PDF (1/9 Pages) Integrated Circuit Systems – 125MHZ, LVCMOS/LVTTL OSCILLATOR REPLACEMENT

Integrated
Circuit
Systems, Inc.
ICS840-125
125MHZ, LVCMOS/LVTTL
OSCILLATOR REPLACEMENT
GENERAL DESCRIPTION
The ICS840-125 is a Gigabit Ethernet Oscillator
ICS
Replacement and a member of the
HiPerClockS™ _HiPerClocksTM _{family of high perfor mance}
devices from ICS. The ICS840-125 uses a
25MHz crystal to synthesize 125MHz. The
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.
FEATURES
• One LVCMOS/LVTTL output, 15Ω output impedance
• Crystal oscillator interface designed for 25MHz,
18pF parallel resonant crystal
• Output frequency: 125MHz
• 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
OE ^Pullup
25MHz
XTAL_IN
XTAL_OUT
Clock
Synthesizer
125MHz
Q
PIN ASSIGNMENT
VDD 1
XTAL_OUT 2
XTAL_IN 3
OE 4
8 nc
7Q
6 VDDO
5 GND
ICS840-125
8-Lead TSSOP
4.40mm x 3.0mm x 0.925mm package body
G Package
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
1
REV. A FEBRUARY 3, 2006