ICS85356I Datasheet, PDF (1/14 Pages) Integrated Circuit Systems – 2:1, DIFFERENTIAL-TO-3.3V DUAL LVPECL / ECL CLOCK MULTIPLEXER

Integrated
Circuit
Systems, Inc.
ICS85356I
2:1, DIFFERENTIAL-TO-3.3V
DUAL LVPECL / ECL CLOCK MULTIPLEXER
GENERAL DESCRIPTION
ICS
The ICS85356I is a dual 2:1 Differential-to-LVPECL
Multiplexer and is a member of the HiPerClockS^TM
HiPerClockS™ _{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 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.
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
to LVPECL. It can also be used in ECL mode by setting V_CC=0V
and V_EE to -3.0V to - 3.8V.
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.
FEATURES
• High speed differential multiplexer.
The device can be configured as a 2:1 multiplexer
• Dual 3.3V LVPECL outputs
• Selectable differential CLKxx, nCLKxx inputs
• CLKxx, nCLKxx pair can accept the following differential
input levels: LVPECL, LVDS, LVHSTL, SSTL, HCSL
• Output frequency: 900MHz (typical)
• Translates any single ended input signal to 3.3V
LVPECL levels with resistor bias on nCLKxx input
• Output skew: 75ps (typical)
• Propagation delay: 1.15ns (typical)
• LVPECL mode operating voltage supply range:
V_CC = 3V to 3.8V, V_EE = 0V
• ECL mode operating voltage supply range:
V_CC = 0V, V_EE = -3V to -3.8V
• -40°C to 85°C ambient operating temperature
• Lead-Free package available
• Compatible with MC100LVEL56
BLOCK DIAGRAM
CLK0A
nCLK0A
0
CLK0B
nCLK0B
1
SEL0
COM_SEL
SEL1
CLK1A
nCLK1A
0
CLK1B
nCLK1B
1
PIN ASSIGNMENT
Q0
nQ0
CLK0A 1
20 VCC
nCLK0A 2 19 Q0
nc 3 18 nQ0
CLK0B 4 17 SEL0
nCLK0B 5 16 COM_SEL
CLK1A 6 15 SEL1
nCLK1A 7
14 VCC
nc 8 13 Q1
CLK1B 9 12 nQ1
nCLK1B 10 11 VEE
CLK0A 1 20 VCC
nCLK0A 2 19 Q0
nc 3 18 nQ0
CLK0B 4 17 SEL0
nCLK0B 5 16 COM_SEL
CLK1A 6 15 SEL1
nCLK1A 7 14 VCC
nc 8 13 Q1
CLK1B 9 12 nQ1
nCLK1B 10 11 VEE
ICS85356I
ICS85356I
20-Lead SOIC
20-Lead TSSOP
Q1
nQ1
7.5mm x 12.8mm x 2.3mm
M Package
6.5mm x 4.4mm x 0.92mm
G Package
Top View
Top View
85356AMI
www.icst.com/products/hiperclocks.html
1
REV. A OCTOBER 7, 2004