ICS85357-11 Datasheet, PDF (2/12 Pages) Integrated Circuit Systems – 4:1 OR 2:1, CRYSTAL OSCILLATOR-TO-3.3V LVPECL / ECL MULTIPLEXER

Integrated
Circuit
Systems, Inc.
ICS85357-11
4:1 OR 2:1, CRYSTAL OSCILLATOR-TO-3.3V
LVPECL / ECL MULTIPLEXER
TABLE 1. PIN DESCRIPTIONS
Number
Name
Type
Description
1, 14, 17, 20
2
V_CC
XTALIN0
Power
Input
Positive supply pins. Connect to 3.3V.
Parallel resonant crystal input.
3
XTALOUT0 Input
Parallel resonant crystal input.
4
XTALIN1
Input
Parallel resonant crystal input.
5
XTALOUT1 Input
Parallel resonant crystal input.
6
XTALIN2
Input
Parallel resonant crystal input.
7
XTALOUT2 Input
Parallel resonant crystal input.
8
XTALIN3
Input
Parallel resonant crystal input.
9
XTALOUT3 Input
Parallel resonant crystal input.
10, 11
12, 13
V_EE
Power
nc
Unused
Negative supply pins. Connect to ground.
No connect.
15, 16
nQ0, Q0 Output
Differential clock outputs. LVPECL interface levels.
18
SEL0
Input Pulldown Clock select input. LVCMOS / LVTTL interface levels.
19
SEL1
Input Pulldown Clock select input. LVCMOS / LVTTL interface levels.
NOTE: Pullup and Pulldown refers to internal input resistors. See Table 2, Pin Characteristics, for typical values.
TABLE 2. PIN CHARACTERISTICS
Symbol
C_IN
R_PULLUP
R_PULLDOWN
Parameter
Input Capacitance SEL0, SEL1
Input Pullup Resistor
Input Pulldown Resistor
Test Conditions
Minimum
Typical
51
51
Maximum
4
Units
pF
KΩ
KΩ
TABLE 3A. CONTROL INPUT FUNCTION TABLE
SEL1
0
0
1
1
Inputs
SEL0
0
1
0
1
Clock Out
CLK
XTALIN0, XTALOUT0
XTALIN1, XTALOUT1
XTALIN2, XTALOUT2
XTALIN3, XTALOUT3
85357AG-11
www.icst.com/products/hiperclocks.html
2
REV. A JULY 25, 2001