ICS85356I
2:1, DIFFERENTIAL-TO-3.3V
DUAL LVPECL / ECL CLOCK MULTIPLEXER
Integrated
Circuit
Systems, Inc.
GENERAL DESCRIPTION
FEATURES
The ICS85356I is a dual 2:1 Differential-to-LVPECL • High speed differential multiplexer.
ICS
Multiplexer and is a member of the HiPerClockSTM
family of High Performance Clock Solutions from
ICS.The device has both common select and indi-
vidual select inputs.When COM_SEL is logic High,
The device can be configured as a 2:1 multiplexer
HiPerClockS™
• Dual 3.3V LVPECL outputs
• Selectable differential CLKxx, nCLKxx inputs
the CLKxx input pairs will be passed to the output. When
COM_SEL is logic Low, the output is determined by the setting
of the SEL0 pin for channel 0 and the SEL1 pin for Channel 1.
• CLKxx, nCLKxx pair can accept the following differential
input levels: LVPECL, LVDS, LVHSTL, SSTL, HCSL
• Output frequency: 900MHz (typical)
The differential input has a common mode range that can accept
most differential input types such as LVPECL, LVDS, LVHSTL,
SSTL, and HCSL. The ICS85356I can therefore be used as a
differential translator to translate almost any differential input type
• Translates any single ended input signal to 3.3V
LVPECL levels with resistor bias on nCLKxx input
• Output skew: 75ps (typical)
to LVPECL. It can also be used in ECL mode by setting V =0V
CC
• Propagation delay: 1.15ns (typical)
and VEE to -3.0V to - 3.8V.
• LVPECL mode operating voltage supply range:
The ICS85356I adds negligible jitter to the input clock and can
operate at high frequencies in excess of 900MHz thus making
it ideal for use in demanding applications such as SONET,
Fibre Channel, 1 Gigabit/10 Gigabit Ethernet.
VCC = 3V to 3.8V, VEE = 0V
• ECL mode operating voltage supply range:
VCC = 0V, VEE = -3V to -3.8V
• -40°C to 85°C ambient operating temperature
• Lead-Free package available
• Compatible with MC100LVEL56
BLOCK DIAGRAM
PIN ASSIGNMENT
CLK0A
nCLK0A
nc
CLK0B
nCLK0B
CLK1A
nCLK1A
nc
VCC
Q0
nQ0
SEL0
COM_SEL
SEL1
VCC
Q1
nQ1
1
2
3
4
5
6
7
8
20
19
18
17
16
15
14
13
12
11
CLK0A
nCLK0A
nc
CLK0B
nCLK0B
CLK1A
nCLK1A
nc
VCC
Q0
nQ0
SEL0
COM_SEL
SEL1
VCC
Q1
nQ1
1
2
3
4
5
6
7
8
20
19
18
17
16
15
14
13
12
11
CLK0A
nCLK0A
0
Q0
nQ0
CLK0B
1
nCLK0B
SEL0
COM_SEL
SEL1
CLK1B
nCLK1B
9
10
CLK1B
nCLK1B
9
10
VEE
VEE
ICS85356I
20-LeadTSSOP
6.5mm x 4.4mm x 0.92mm
G Package
ICS85356I
20-Lead SOIC
7.5mm x 12.8mm x 2.3mm
M Package
CLK1A
nCLK1A
0
Q1
nQ1
CLK1B
1
Top View
Top View
nCLK1B
85356AMI
www.icst.com/products/hiperclocks.html
REV. A OCTOBER 7, 2004
1