ICS8534-01 Datasheet, PDF (1/20 Pages) Integrated Circuit Systems – LOW SKEW, 1-TO-22 DIFFERENTIAL-TO-3.3V LVPECL FANOUT BUFFER

LOW SKEW, 1-TO-22 DIFFERENTIAL-TO-3.3V LVPECL
FANOUT BUFFER
ICS8534-01
General Description
The ICS8534-01 is a low skew, 1-to-22
ICS
Differential-to-3.3V LVPECL Fanout Buffer and a
HiPerClockS™ _{member of the HiPerClockS™ Family of High}
Performance Clock Solutions from IDT. The
ICS8534-01 has two selectable clock inputs. The
CLK, nCLK pair can accept most standard differential input levels.
The PCLK, nPCLK pair can accept LVPECL, CML, or SSTL input
levels. The device is internally synchronized to eliminate runt
pulses on the outputs during asynchronous assertion/deassertion
of the OE pin. The ICS8534-01’s low output and part-to-part skew
characteristics make it ideal for workstation, server, and other high
performance clock distribution applications.
Features
• Twenty-two differential LVPECL outputs
• Selectable differential CLK/nCLK or LVPECL clock inputs can
accept the following differential input levels: LVDS, LVPECL,
LVHSTL
• CLK/nCLK pair can accept the following differential input levels:
LVPECL, LVDS, LVHSTL, HCSL, SSTL
• PCLK/nPCLK supports the following input levels: LVPECL,
CML, SSTL
• Maximum output frequency: 500MHz
• Output skew: 100ps (maximum)
• Translates any single-ended input signal (LVCMOS, LVTTL,
GTL) to LVPECL levels with resistor bias on nCLK input
• Additive phase jitter, RMS): 0.04ps (typical)
• Full 3.3V supply mode
• 0°C to 85°C ambient operating temperature
• Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages.
Block Diagram
CLK_SEL ^Pullup
CLK ^Pulldown
nCLK ^{Pullup/Pulldown}
0
PCLK ^Pulldown
nPCLK ^{Pullup/Pulldown}
1
OE ^Pullup
LE
Q
D
Pin Assignment
22
Q0:Q21
22 _nQ0:nQ21
VCCO
nQ6
Q6
nQ5
Q5
nQ4
Q4
nQ3
Q3
nQ2
Q2
nQ1
Q1
nQ0
Q0
VCCO
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
1
48
2
47
3
46
4
45
5
44
6
43
7
42
8
ICS8534-01
41
9
40
10
39
11
38
12
37
13
36
14
35
15
34
16
33
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
V_CCO
Q14
nQ14
Q15
nQ15
Q16
nQ16
Q17
nQ17
Q18
nQ18
Q19
nQ19
Q20
nQ20
VCCO
IDT™ / ICS™ 3.3V LVPECL FANOUT BUFFER
64-Lead TQFP E-Pad
10mm x 10mm x 1.0mm package body
Y package
Top View
1
ICS8534AY-01 REV. A DECEMBER 6, 2007