ICS843022 Datasheet, PDF (2/13 Pages) Integrated Circuit Systems – FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V LVPECL CLOCK GENERATOR

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS843022
FEMTOCLOCKS™ CRYSTAL-TO-
3.3V LVPECL CLOCK GENERATOR
TABLE 1. PIN DESCRIPTIONS
Number
Name
Type
Description
1
V_CCA
Power
Analog supply pin.
2
V_EE
Power
3, 4
XTAL_OUT,
XTAL_IN
Input
Negative supply pin.
Crystal oscillator interface. XTAL_in is the input,
XTAL_OUT is the output.
5
FREQ_SEL Input Pulldown Frequency select pin. LVCMOS/LVTTL interface levels.
6, 7
nQ0, Q0
Output
Differential clock outputs. LVPECL interface levels.
8
V_CC
Power
Core supply pin.
NOTE: Pulldown refers to internal input resistors. See Table 2, Pin Characteristics, for typical values.
TABLE 2. PIN CHARACTERISTICS
Symbol
C_IN
R_PULLDOWN
Parameter
Input Capacitance
Input Pulldown Resistor
Test Conditions
Minimum
Typical
4
51
Maximum
Units
pF
KΩ
843022AG
www.icst.com/products/hiperclocks.html
2
REV. A NOVEMBER 30, 2004