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889874AK
www.icst.com/products/hiperclocks.html
REV. A MAY 19, 2004
1
Integrated
Circuit
Systems, Inc.
ICS889874
1:2
D
IFFERENTIAL
-
TO
-LVPECL B
UFFER
/D
IVIDER
PRELIMINARY
G
ENERAL
D
ESCRIPTION
The ICS889874 is a high speed 1:2 Differential-
to-LVPECL Buffer/Divider and is a member of
the HiPerClockS
TM
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.
F
EATURES
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
-40C to 85C ambient operating temperature
Pin compatible with SY89874U
B
LOCK
D
IAGRAM
P
IN
A
SSIGNMENT
HiPerClockSTM
ICS
Q0
nQ0
Q1
nQ1
S2
nRESET
IN
V
T
nIN
S0
S1
V
REF_AC
ICS889874
16-Lead VFQFN
3mm x 3mm x 0.95 package body
K Package
Top View
Q0
nQ0
Q1
nQ1
IN
V
T
V
REF
_
AC
nIN
S2
nc
V
CC
nRESET
S0
S1
V
CC
V
EE
Enable
MUX
Enable
FF
Decoder
00 2
01 4
10 8
11 16
0
1
1
2
3
4
12
11
10
9
5 6 7 8
16 15 14 13
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.
background image
889874AK
www.icst.com/products/hiperclocks.html
REV. A MAY 19, 2004
2
Integrated
Circuit
Systems, Inc.
ICS889874
1:2
D
IFFERENTIAL
-
TO
-LVPECL B
UFFER
/D
IVIDER
PRELIMINARY
T
ABLE
1. P
IN
D
ESCRIPTIONS
T
ABLE
2. P
IN
C
HARACTERISTICS
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background image
889874AK
www.icst.com/products/hiperclocks.html
REV. A MAY 19, 2004
3
Integrated
Circuit
Systems, Inc.
ICS889874
1:2
D
IFFERENTIAL
-
TO
-LVPECL B
UFFER
/D
IVIDER
PRELIMINARY
T
ABLE
3B. T
RUTH
T
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background image
889874AK
www.icst.com/products/hiperclocks.html
REV. A MAY 19, 2004
4
Integrated
Circuit
Systems, Inc.
ICS889874
1:2
D
IFFERENTIAL
-
TO
-LVPECL B
UFFER
/D
IVIDER
PRELIMINARY
T
ABLE
4A. P
OWER
S
UPPLY
DC C
HARACTERISTICS
,
V
CC
= 3.3V10%
OR
2.5V5%; T
A
= -40C
TO
85C
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BSOLUTE
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AXIMUM
R
ATINGS
NOTE: Stresses beyond those listed under Absolute
Maximum Ratings may cause permanent damage
to the device. These ratings are stress specifi-
cations only. Functional operation of product at
these conditions or any conditions beyond those
listed in the
DC Characteristics or AC Character-
istics is not implied. Exposure to absolute maxi-
mum rating conditions for extended periods may
affect product reliability.
Supply Voltage, V
CC
-0.5V to +4.0V
Inputs, V
I
-0.5V to V
CC
+ 0.5 V
Outputs, I
O
Continuous Current
50mA
Surge Current
100mA
Input Current IN, nIN
50mA
V
T
Current, I
VT
100mA
V
REF_AC
Sink/Source, I
VREF_AC
0.5mA
Operating Temperature Range, TA -40C to +85C
Storage Temperature, T
STG
-65C to 150C
Package Thermal Impedance,
JA
51.5C/W (0 lfpm)
(Junction-to-Ambient)
T
ABLE
4B. LVCMOS/LVTTL DC C
HARACTERISTICS
,
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CC
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OR
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A
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background image
889874AK
www.icst.com/products/hiperclocks.html
REV. A MAY 19, 2004
5
Integrated
Circuit
Systems, Inc.
ICS889874
1:2
D
IFFERENTIAL
-
TO
-LVPECL B
UFFER
/D
IVIDER
PRELIMINARY
T
ABLE
4D. LVPECL DC C
HARACTERISTICS
,
V
CC
= 3.3V10%
OR
2.5V5%; T
A
= -40C
TO
85C
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