ICS8737-11 Datasheet, PDF (1/13 Pages) Integrated Circuit Systems – LOW SKEW ÷1/÷2 DIFFERENTIAL-TO- 3.3V LVPECL CLOCK GENERATOR

Integrated
Circuit
Systems, Inc.
ICS8737-11
LOW SKEW ÷1/÷2
DIFFERENTIAL-TO- 3.3V LVPECL CLOCK GENERATOR
GENERAL DESCRIPTION
The ICS8737-11 is a low skew, high performance
,&6
Differential-to-3.3V LVPECL Clock Generator/
HiPerClockS™ _{Divider and a member of the HiPerClockS™}
family of High Performance Clock Solutions from
ICS. The ICS8737-11 has two selectable clock
inputs. The CLK, nCLK pair can accept most standard differ-
ential input levels. The PCLK, nPCLK pair can accept
LVPECL, CML, or SSTL input levels.The clock enable is
internally synchronized to eliminate runt pulses on the
outputs during asynchronous assertion/deassertion of the
clock enable pin.
Guaranteed output and part-to-part skew characteristics
make the ICS8737-11 ideal for clock distribution applications
demanding well defined performance and repeatability.
FEATURES
• 2 divide by 1 differential 3.3V LVPECL outputs;
2 divide by 2 differential 3.3V LVPECL outputs
• Selectable CLK, nCLK or LVPECL clock inputs
• CLK, nCLK pair can accept the following differential input
levels: LVDS, LVPECL, LVHSTL, SSTL, HCSL
• PCLK, nPCLK supports the following input types:
LVPECL, CML, SSTL
• Maximum output frequency up to 650MHz
• Translates any single ended input signal (LVCMOS, LVTTL,
GTL) to LVPECL levels with resistor bias on nCLK input
• Output skew: 60ps (maximum)
• Part-to-part skew: 200ps (maximum)
• Bank skew: Bank A - 20ps (maximum),
Bank B - 35ps (maximum)
• Propagation delay: 1.7ns (maximum)
• 3.3V operating supply
• 0°C to 70°C ambient operating temperature
• Industrial temperature information available upon request
BLOCK DIAGRAM
CLK_EN
D
Q
LE
CLK
nCLK
0
÷1
PCLK
nPCLK
1
÷2
CLK_SEL
MR
PIN ASSIGNMENT
QA0
nQA0
QA1
nQA1
QB0
nQB0
QB1
nQB1
VEE 1
20 QA0
CLK_EN 2 19 nQA0
CLK_SEL 3 18 VCC
CLK 4 17 QA1
nCLK 5 16 nQA1
PCLK 6 15 QB0
nPCLK 7 14 nQB0
nc 8
13 VCC
MR 9 12 QB1
VCC 10 11 nQB1
ICS8737-11
20-Lead TSSOP
6.50mm x 4.40mm x 0.92 package body
G Package
Top View
8737AG-11
www.icst.com/products/hiperclocks.html
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REV. A JULY 13, 2001