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ICS840002I-01

IDT
Part Number ICS840002I-01
Manufacturer IDT
Description CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
Published Jun 30, 2016
Detailed Description www.IDT.com ICS840002I-01 FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER GENERAL DESCRIPTION The ICS840002I...
Datasheet PDF File ICS840002I-01 PDF File

ICS840002I-01
ICS840002I-01

Overview
www.
IDT.
com ICS840002I-01 FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER GENERAL DESCRIPTION The ICS840002I-01 is a 2 output LVCMOS/LVTTL ICS Synthesizer optimized to generate Ethernet HiPerClockS™ reference clock frequencies and is a member of the HiPerClocksTM family of high performance clock solutions from IDT.
Using a 25MHz 18pF parallel resonant crystal, the following frequencies can be generated based on the 2 frequency select pins (F_SEL1:0): 156.
25MHz, 125MHz, and 62.
5MHz.
The ICS840002I-01 uses IDT’s 3rd generation low phase noise VCO technology and can achieve 1ps or lower typical random rms phase jitter, easily meeting Ethernet jitter requirements.
The ICS840002I01 is packaged in a small 16-pin TSSOP package.
FREQUENCY SELECT FUNCTION TABLE FEATURES • Two LVCMOS/LVTTL outputs @ 3.
3V, 17Ω typical output impedance • Selectable crystal oscillator interface or LVCMOS single-ended input • Supports the following output frequencies: 156.
25MHz, 125MHz and 62.
5MHz • Output frequency range: 56MHz - 175MHz • VCO range: 560MHz - 700MHz • Output skew: 12ps (maximum) • RMS phase jitter at 156.
25MHz (1.
875MHz - 20MHz): 0.
47ps (typical) Offset Noise Power 100Hz -97.
4 dBc/Hz 1kHz .
.
.
-120.
2 dBc/Hz 10kHz .
.
.
-127.
6 dBc/Hz 100kHz .
.
.
-126.
1 dBc/Hz • Power supply modes: Core/Output 3.
3V/3.
3V 3.
3V/2.
5V 2.
5V/2.
5V • -40°C to 85°C ambient operating temperature • Available in both standard (RoHS 5) and lead-free RoHS (6) packages F_SEL1 0 F_SEL0 0 Inputs M Divider Value 25 N Divider Value 4 Output Frequency (25MHz Ref.
) 156.
25 01 25 5 125 10 25 10 62.
5 11 25 5 125 BLOCK DIAGRAM OE Pullup F_SEL1:0 Pullup:Pullup nPLL_SEL Pulldown nXTAL_SEL Pulldown XTAL_IN 25MHz OSC 0 XTAL_OUT TEST_CLK Pulldown 1 2 Phase Detector VCO F_SEL1:0 1N 0 0 ÷4 0 1 ÷5 0 1 0 ÷10 1 1 ÷5 M = ÷25 (fixed) PIN ASSIGNMENT F_SEL0 1 16 F_SEL1 nXTAL_SEL 2 15 GND TEST_CLK 3 14 GND OE 4 13 Q0 MR 5 12 Q1 nPLL_SEL 6...


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