ICS8534-01 Datasheet, PDF (1/17 Pages) Integrated Circuit Systems – LOW SKEW, 1-TO-22 DIFFERENTIAL-TO-3.3V LVPECL FANOUT BUFFER

Integrated
Circuit
Systems, Inc.
ICS8534-01
LOW SKEW, 1-TO-22
DIFFERENTIAL-TO-3.3V LVPECL FANOUT BUFFER
GENERAL DESCRIPTION
ICS
The ICS8534-01 is a low skew, 1-to-22 Differen-
tial-to-3.3V LVPECL Fanout Buffer and a member
HiPerClockS™ _{of the HiPerClockS™Family of High Performance}
Clock Solutions from ICS. 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 de-
vice 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 char-
acteristics make it ideal for workstation, server, and other high
performance clock distribution applications.
FEATURES
• 22 differential LVPECL outputs
• Selectable differential CLK, nCLK or LVPECL clock inputs
• CLK, nCLK pair can accept the following differential
input levels: LVPECL, LVDS, LVHSTL, HCSL, SSTL
• PCLK, nPCLK supports the following input types:
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)
• 3.3V supply mode
• 0°C to 85°C ambient operating temperature
BLOCK DIAGRAM
CLK_SEL
CLK
nCLK
0
PCLK
nPCLK
1
OE
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
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
49
32
50
31
51
30
52
29
53
28
54
27
55
26
56
ICS8534-01
25
57
24
58
23
59
22
60
21
61
20
62
19
63
18
64
17
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
VCCO
Q14
nQ14
Q15
nQ15
Q16
nQ16
Q17
nQ17
Q18
nQ18
Q19
nQ19
Q20
nQ20
VCCO
8534AY-01
64-Lead TQFP E-Pad
10mm x 10mm x 1.0mm package body
Y package
Top View
www.icst.com/products/hiperclocks.html
1
REV. A NOVEMBER 19, 2004