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ICS840-125

Integrated Circuit Systems
Part Number ICS840-125
Manufacturer Integrated Circuit Systems
Description LVCMOS/LVTTL OSCILLATOR REPLACEMENT
Published Jul 14, 2008
Detailed Description Integrated Circuit Systems, Inc. ICS840-125 125MHZ, LVCMOS/LVTTL OSCILLATOR REPLACEMENT FEATURES • One LVCMOS/LVTTL out...
Datasheet PDF File ICS840-125 PDF File

ICS840-125
ICS840-125

Overview
Integrated Circuit Systems, Inc.
ICS840-125 125MHZ, LVCMOS/LVTTL OSCILLATOR REPLACEMENT 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 GENERAL DESCRIPTION The ICS840-125 is a Gigabit Ethernet Oscillator Replacement and a member of the HiPerClockS™ HiPerClocks TM family of high perfor mance devices from ICS.
The ICS840-125 uses a 25MHz crystal to synthesize 125MHz.
The ICS840-125 has excellent jitter perfor mance.
The ICS840-125 is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space.
IC S www.
DataSheet4U.
com BLOCK DIAGRAM OE Pullup PIN ASSIGNMENT VDD XTAL_OUT XTAL_IN OE 1 2 3 4 8 7 6 5 nc Q VDDO GND 25MHz XTAL_IN Clock Synthesizer 125MHz Q ICS840-125 8-Lead TSSOP 4.
40mm x 3.
0mm x 0.
925mm package body G Package Top View XTAL_OUT 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 Integrated Circuit Systems, Inc.
ICS840-125 125MHZ, LVCMOS/LVTTL OSCILLATOR REPLACEMENT Type Power Input Input Power Power Pullup Description Power supply pin.
Crystal oscillator interface.
XTAL_IN is the input, XTAL_OUT is the output.
Output enable pin.
When HIGH, Q output is enabled.
When LOW, forces Q output to HiZ state.
LVCMOS/LVTTL interface levels.
Power supply ground.
Output supply pin.
Single-ended clock output.
LVCMOS/LVTTL interface levels.
15Ω output impedance.
No connect TABLE 1.
PIN DESCRIPTIONS Number 1 2, 3 4 5 www.
DataSheet4U.
com 6 Name VDD XTAL_OUT, XTAL_IN OE GND VDDO Q nc 7 8 Output Unused NOTE: Pullup refers to internal input resistors.
See Table 2, Pin Characteristics, for typical valu...


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