ICS85354 Datasheet, PDF (4/16 Pages) Integrated Circuit Systems – DUAL 2:1/1:2 DIFFERENTIAL -TO-LVPECL/ECL MULTIPLEXER

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS85354
DUAL 2:1/1:2
DIFFERENTIAL -TO-LVPECL/ECL MULTIPLEXER
TABLE 1. PIN DESCRIPTIONS
Number
Name
Type
Description
1, 2
QB0, nQB0 Output
Differential output pair. LVPECL/ECL interface levels.
3, 4
QB1, nQB1 Output
Differential output pair. LVPECL/ECL interface levels.
5
CLKB
Input Pulldown Non-inverting LVPECL/ECL differential clock input.
6
nCLKB
Input
Pullup/
Pulldown
Inverting differential LVPECL clock input. V_CC/2 default when left floating.
Clock select pin for QBx outputs. When HIGH, selects QB1, nQB1
7
CLK_SELB Input Pulldown outputs. When LOW, selects QB0, nQB0 outputs.
LVCMOS/LVTTL interface levels.
8
V_EE
Power
Negative supply pin.
9
nCLKA1
Input
Pullup/
Pulldown
Inverting differential LVPECL clock input. V_CC/2 default when left floating.
10
CLKA1
Input Pulldown Non-inverting LVPECL differential clock input.
11
nCLKA0
Input
Pullup/
Pulldown
Inverting differential LVPECL clock input. V_CC/2 default when left floating.
12
CLKA0
Input Pulldown Non-inverting LVPECL differential clock input.
13
14
15, 16
V_CC
CLK_SELA
nQA, QA
Power
Input
Output
Positive supply pin.
Pulldown
Clock select pin for QA outputs. When HIGH, selects QA output.
When LOW, selects nQA output. LVCMOS/LVTTL interface levels.
Differential output pair. LVPECL/ECL interface levels.
NOTE: Pulldown and Pullup refer to internal input resistors. See Table 2, Pin Characteristics, for typical values.
TABLE 2. PIN CHARACTERISTICS
Symbol
R_PULLDOWN
R_VCC/2
Parameter
Input Pulldown Resistor
Pullup/Pulldown Resistors
Test Conditions
Minimum
Typical
37.5
37.5
Maximum
Units
KΩ
KΩ
TABLE 3A. CONTROL INPUT FUNCTION TABLE, BANK A
Control Inputs
CLK_SELA
0
1
Bank A
Outputs
QA, nQA
Selects CLKA0, nCLKA0
Selects CLKA1, nCLKA1
TABLE 3B. CONTROL INPUT FUNCTION TABLE, BANK B
Control Inputs
CLK_SELB
0
1
Bank B
Outputs
QB0, nQB0
QB1, nQB1
Follows CLKB input
Low
Low
Follows CLKB input
85354AK
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4
REV. B JUNE 8, 2004