ICS840002-32 Datasheet, PDF (2/8 Pages) Integrated Circuit Systems – FEMTOCLOCKS™ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS840002-32
FEMTOCLOCKS™ CRYSTAL-TO-
LVCMOS/LVTTL FREQUENCY SYNTHESIZER
TABLE 1. PIN DESCRIPTIONS
Number
Name
Type
Description
1
V_DD
Power
2,
3
XTAL_OUT,
XTAL_IN
Input
Core supply pin.
Crystal oscillator interface.
4
GND
Power
Power supply ground.
5, 7
Q1, Q0
Output
Single-ended clock outputs. LVCMOS/LVTTL interface levels.
15Ω typical output impedence.
1
V_DDO
Power
Output supply pin.
8
SEL
Input Pulldown Select pin. LVCMOS/LVTTL interface levels.
NOTE: Pulldown refers to internal input resistors. See Table 2, Pin Characteristics, for typical values.
TABLE 2. PIN CHARACTERISTICS
Symbol Parameter
C_IN
Input Capacitance
C_PD
Power Dissipation Capacitance
R_PULLDOWN Input Pulldown Resistor
R
OUT
Output Impedance
Test Conditions
V_DD, V_DDO = 3.465V
V_DD = 3.465V, V_DDO = 2.625V
Minimum
Typical
4
TBD
TBD
51
15
Maximum
Units
pF
pF
pF
kΩ
Ω
840002BG-32
www.icst.com/products/hiperclocks.html
2
REV. A JUNE 27, 2005