ICS889874 Datasheet, PDF (1/14 Pages) Integrated Circuit Systems – DIFFERENTIAL-TO-LVPECL BUFFER/DIVIDER

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS889874
1:2
DIFFERENTIAL-TO-LVPECL BUFFER/DIVIDER
GENERAL DESCRIPTION
ICS
The ICS889874 is a high speed 1:2 Differential-
to-LVPECL Buffer/Divider and is a member of
HiPerClockS™ _{the HiPerClockS ™ family of high performance}
clock solutions from ICS. The ICS889874 has
a selectable ÷1, ÷2, ÷4, ÷8, ÷16 output divider,
which allows the device to be used as either a 1:2 fanout
buffer or frequency divider. The clock input has internal
termination resistors, allowing it to interface with several
differential signal types while minimizing the number of
required external components. The device is packaged in
a small, 3mm x 3mm VFQFN package, making it ideal for
use on space-constrained boards.
FEATURES
• 2 LVPECL outputs
• Frequency divide select options: ÷ 1, ÷ 2, ÷4, ÷8, ÷16
• IN, nIN input can accept the following differential input levels:
LVPECL, LVDS, CML
• Output frequency: > 2.5GHz
• Output skew: 5ps (typical)
• Part-to-part skew: TBD
• Additive jitter, RMS: <0.03ps (design target)
• Supply voltage range: (LVPECL), 2.375V to 3.465V
Supply voltage range: (ECL), -3.465V to -2.375V
• -40°C to 85°C ambient operating temperature
• Pin compatible with SY89874U
BLOCK DIAGRAM
S2
nRESET
Enable
FF
Enable
MUX
0
IN
V_T
nIN
S0
Decoder
S1
1
00 ÷2
01 ÷4
10 ÷8
11 ÷16
PIN ASSIGNMENT
Q0
nQ0
16 15 14 13
Q0 1
12 IN
nQ0 2
11 VT
Q1 3
1 0 VREF_AC
nQ1 4
9 nIN
5678
Q1
nQ1
ICS889874
16-Lead VFQFN
3mm x 3mm x 0.95 package body
K Package
Top View
V_{REF_AC}
The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on initial
product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice.
889874AK
www.icst.com/products/hiperclocks.html
REV. A MAY 19, 2004
1