ICS843004I-04 Datasheet, PDF (1/14 Pages) Integrated Circuit Systems – FEMTOCLOCKS-TM CRYSTAL/LVCMOS-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
ICS843004I-04
FEMTOCLOCKS™ CRYSTAL/LVCMOS-TO-
3.3V LVPECL FREQUENCY SYNTHESIZER
GENERAL DESCRIPTION
The ICS843004I-04 is a 4 output LVPECL
ICS
Synthesizer optimized to generate clock
HiPerClockS™ _{frequencies for a variety of high performance}
applications and is a member of the
HiPerClocks^TM family of high performance
clock solutions from ICS. This device can select its input
reference clock from either a crystal input or a single-
ended clock signal. It can be configured to generate 4
outputs with individually selectable divide-by-one or
divide-by-four function via the 4 frequency select pins
(F_SEL[3:0]). The ICS843004I-04 uses ICS’ 3^rd
generation low phase noise VCO technology and can
achieve 1ps or lower typical rms phase jitter. This
ensures that it will easily meet clocking requirements
for SDH (STM-1/STM-4/STM-16) and SONET (OC-3/
OC12/OC-48). This device is suitable for multi-rate and
multiple port line card applications. The ICS843004I-04
is conveniently packaged in a small 24-pin TSSOP
package.
FEATURES
• Four LVPECL outputs
• Selectable crystal oscillator interface
or LVCMOS/LVTTL single-ended input
• Supports the following applications: SONET/SDH, SATA,
or 10Gb Ethernet
• Output frequency range: 140MHz - 170MHz,
560MHz - 680MHz
• VCO range: 560MHz - 680MHz
• Crystal oscillator and CLK range: 17.5MHz - 21.25MHz
• RMS phase jitter @ 622.08MHz output, using a 19.44MHz
crystal (12kHz - 20MHz): 0.82ps (typical)
• RMS phase jitter @ 156.25MHz output, using a 19.53125MHz
crystal (1.875MHz - 20MHz): 0.57ps (typical)
• RMS phase jitter @ 155.52MHz output, using a 19.44MHz
crystal (12kHz - 20MHz): 0.94ps (typical)
• Full 3.3V supply mode
• -40°C to 85°C ambient operating temperature
• Available in both standard and lead-free RoHS compliant
packages
BLOCK DIAGRAM
XTAL_IN
OSC 0
÷1
XTAL_OUT
Phase
VCO
CLK ^Pulldown
1
Detector
÷4
INPUT_SEL ^Pulldown
M = ÷32
MR ^Pulldown
F_SEL0 ^Pullup
F_SEL1 ^Pullup
F_SEL2 ^Pullup
F_SEL3 ^Pullup
0
Q0
nQ0
1
0
Q1
1
nQ1
0
Q2
1
nQ2
0
Q3
1
nQ3
843004AGI-04
www.icst.com/products/hiperclocks.html
1
PIN ASSIGNMENT
nQ1 1
Q1 2
VCCo 3
Q0 4
nQ0 ⁵
MR ⁶
F_SEL3 ⁷
nc ⁸
VCCA ⁹
F_SEL0 ¹⁰
VCC ¹¹
F_SEL1 ¹²
24 nQ2
23 Q2
2 2 VCCO
21 Q3
20 nQ3
19 VEE
18 F_SEL2
17 INPUT_SEL
16 _CLK
15 _VEE
14 _{XTAL_IN}
13 _{XTAL_OUT}
ICS843004I-04
24-Lead TSSOP
4.40mm x 7.8mm x 0.92mm
package body
G Package
Top View
REV. A FEBRUARY 15, 2006