ICS8538-31 Datasheet, PDF (2/14 Pages) Integrated Device Technology – LOW SKEW, 1-TO-8, CRYSTAL OSCILLATOR/LVCMOS-TO-3.3V LVPECL FANOUT BUFFER

ICS8538-31
LOW SKEW, 1-TO-8, CRYSTAL OSCILLATOR/LVCMOS-TO-3.3V LVPECL FANOUT BUFFER
Table 1. Pin Descriptions
Number
Name
Type
Description
1
CLK
Input Pulldown Single-ended clock input. LVCMOS/LVTTL interface levels.
2
CLK_SEL
Input Pulldown
3
CLK_EN
Input Pullup
4, 12, 25
5, 6
V_EE
nQ7, Q7
Power
Output
Negative supply pins.
Differential output pair. LVPECL interface levels.
7, 17, 22
8, 9
V_CCO
nQ6, Q6
Power
Output
Output supply pins.
Differential output pair. LVPECL interface levels.
10, 11
nQ5, Q5
Output
Differential output pair. LVPECL interface levels.
13, 14
nQ4, Q4
Output
Differential output pair. LVPECL interface levels.
15, 16
nQ3, Q3
Output
Differential output pair. LVPECL interface levels.
18, 19
nQ2, Q2
Output
Differential output pair. LVPECL interface levels.
20, 21
nQ1, Q1
Output
Differential output pair. LVPECL interface levels.
23, 24
nQ0, Q0
Output
Differential output pair. LVPECL interface levels.
26,
27
XTAL_OUT
XTAL_IN
Input
Crystal oscillator interface. XTAL_IN is the input, XTAL_OUT is the output.
28
V_CC
Power
Positive supply pin.
NOTE: Pullup and Pulldown refer to internal input resistors. See Table 2, Pin Characteristics, for typical values.
Table 2. Pin Characteristics
Symbol
Parameter
C_IN
R_PULLUP
R_PULLDOWN
Input Capacitance
Input Pullup Resistor
Input Pulldown Resistor
Test Conditions
Minimum
Typical
4
51
51
Maximum
Units
pF
kΩ
kΩ
IDT™ / ICS™ LVPECL FANOUT BUFFER
2
ICS8538BG-31 REV. B FEBRUARY 5, 2008