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ICS844011I Datasheet Preview

ICS844011I Datasheet

CRYSTAL-TO- LVDS CLOCK GENERATOR

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Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS844011I
FEMTOCLOCKS™CRYSTAL-TO- LVDS
CLOCK GENERATOR
GENERAL DESCRIPTION
The ICS844011I is a Fibre Channel Clock
ICS Generator and a member of the HiPerClocksTM
HiPerClockS™ family of high performance devices from ICS.
The ICS844011I uses an 18pF parallel resonant
crystal over the range of 20.4MHz - 28.3MHz. For
Fibre Channel applications, a 26.5625MHz crystal is used.
The ICS844011I has excellent <1ps phase jitter per-
formance, over the 637kHz - 10MHz integration range. The
ICS844011I is packaged in a small 8-pin TSSOP, making it
ideal for use in systems with limited board space.
FEATURES
(1) Differential LVDS output
Crystal oscillator interface, 18pF parallel resonant crystal
(20.4MHz - 28.3MHz)
Output frequency range: 81.66MHz - 113.33MHz
VCO range: 490MHz - 680MHz
RMS phase jitter @ 106.25MHz, using a 26.5625MHz crystal
(637kHz - 10MHz): 0.75ps (typical)
3.3V or 2.5V operating supply
-40°C to 85°C ambient operating temperature
COMMON CONFIGURATION TABLE - FIBRE CHANNEL
Inputs
Crystal Frequency (MHz) M
26.5625
25
24
24
N
Multiplication
Value M/N
64
64
Output Frequency
(MHz)
106.25
100
BLOCK DIAGRAM
OE Pullup
XTAL_IN
XTAL_OUT
OSC
Phase
Detector
VCO
490MHz - 680MHz
N = ÷6 (fixed)
M = ÷24 (fixed)
Q
nQ
PIN ASSIGNMENT
VDDA
GND
XTAL_OUT
XTAL_IN
1
2
3
4
8 VDD
7Q
6 nQ
5 OE
ICS844011I
8-Lead TSSOP
4.40mm x 3.0mm x 0.925mm
package body
G Package
Top View
The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on initial
product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice.
844011AGI
www.icst.com/products/hiperclocks.html
REV. A JUNE 28, 2005
1




ICS

ICS844011I Datasheet Preview

ICS844011I Datasheet

CRYSTAL-TO- LVDS CLOCK GENERATOR

No Preview Available !

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS844011I
FEMTOCLOCKS™CRYSTAL-TO- LVDS
CLOCK GENERATOR
TABLE 1. PIN DESCRIPTIONS
Number Name
Type
Description
1
VDDA
Power
2
GND
Power
Analog supply pin.
Power supply ground.
3, 4
XTAL_OUT,
XTAL_IN
Input
Crystal oscillator interface. XTAL_IN is the input,
XTAL_OUT is the output.
5
OE
Input
Pullup
Output enable pin. When HIGH, Q/nQ output is active. When LOW, the Q/nQ
output is in a high impedance state. LVCMOS/LVTTL interface levels.
6, 7
nQ, Q
Output
Differential clock outputs. LVDS interface levels.
8 VDD Power
Core supply pin.
NOTE: Pullup refers to internal input resistors. See Table 2, Pin Characteristics, for typical values.
TABLE 2. PIN CHARACTERISTICS
Symbol
CIN
RPULLUP
Parameter
Input Capacitance
Input Pullup Resistor
Test Conditions
Minimum
Typical
4
51
Maximum
Units
pF
kΩ
844011AGI
www.icst.com/products/hiperclocks.html
2
REV. A JUNE 28, 2005


Part Number ICS844011I
Description CRYSTAL-TO- LVDS CLOCK GENERATOR
Maker ICS
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