ICS8535I-31 Datasheet, PDF (2/15 Pages) Integrated Device Technology – LOW SKEW, 1-TO-4, CRYSTAL OSCILLATOR/LVCMOS-TO-3.3V LVPECL FANOUT BUFFER

ICS8535I-31
LOW SKEW, 1-TO-4, CRYSTAL OSCILLATOR/LVCMOS-TO-3.3V LVPECL FANOUT BUFFER
Table 1. Pin Descriptions
Number
1
2
3
Name
V_EE
CLK_EN
CLK_SEL
Type
Power
Input
Pullup
Input Pulldown
Description
Negative supply pin.
Synchronizing clock enable. When HIGH, clock outputs follows clock input.
When LOW, Q outputs are forced low, nQ outputs are forced high.
LVCMOS / LVTTL interface levels.
Clock select input. When HIGH, selects XTAL inputs
When LOW, selects CLK input. LVCMOS / LVTTL interface levels.
4
CLK
Input Pulldown Single-ended clock input. LVCMOS/LVTTL interface levels.
5, 8, 9
6,
7
10, 13, 18
11, 12
14, 15
16, 17
19, 20
nc
XTAL_IN,
XTAL_OUT
V_CC
nQ3, Q3
nQ2, Q2
nQ1, Q1
nQ0, Q0
Unused
Input
Power
Output
Output
Output
Output
No connect.
Crystal oscillator interface. XTAL_IN is the input. XTAL_OUT is the output.
Positive supply pins.
Differential output pair. LVPECL interface levels.
Differential output pair. LVPECL interface levels.
Differential output pair. LVPECL interface levels.
Differential output pair. LVPECL interface levels.
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
Input Capacitance
R_PULLUP
Input Pullup Resistor
R_PULLDOWN Input Pulldown Resistor
Test Conditions
Minimum
Typical
4
51
51
Maximum
Units
pF
kΩ
kΩ
IDT™ / ICS™ 3.3V LVPECL FANOUT BUFFER
2
ICS8535AGI-31 REV. A AUGUST 16, 2007