minated transmission lines. The effective fanout can be increased from 20 to 40 by utilizing the ability of the outputs to
drive two series terminated lines.
The divide select inputs, DIV_SELx, control the output frequency of each bank. The outputs can be utilized in the ÷1,
÷2 or a combination of ÷1 and ÷2 modes. The master reset/
output enable input, nMR/OE, resets the internal dividers and
controls the active and high impedance states of all outputs.
The output polarity inputs, INV0:1, control the polarity (inverting or non-inverting) of the outputs of each bank. Outputs
QA0-QA4 are inverting for every combination of the INV0:1
input. The timing relationship between the inverting and noninverting outputs at different frequencies is shown in the Timing Diagrams.
The ICS8701-01 is characterized at 3.3V and mixed 3.3V input supply, and 2.5V output supply operating modes. Guaranteed bank, output and part-to-part skew characteristics
make the ICS8701-01 ideal for those clock distribution applications demanding well defined performance and repeatability.
Generator and a member of the HiPerClockS
fa mil y of Hi gh Performance Clock Solutions
from ICS. The low impedance LVCMOS outputs
are designed to drive 50Ω series or parallel ter-
FE ATURES
20 LVCMOS outputs, 7Ω typical output impedance
Output frequency up to 250 MHz
250ps bank skew, 300ps output skew, 350ps multiple
frequency skew, 700ps part-to-part skew
Selectable inverting and non-inverting outputs
LVCMOS / LVTTL clock input
LVCMOS / LVTTL control inputs
Bank enable logic allows unused banks to be disabled
in reduced fanout applications
3.3V or mixed 3.3V input, 2.5V output operating
supply modes
48 lead low-profile QFP (LQFP), 7mm x 7mm x 1.4mm
Inputs-0.5V to VDDI + 0.5V
Outputs-0.5V to VDDOx + 0.5V
Ambient Operating Temperature0°C to 70°C
Storage Temperature-65°C to 150°C
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ratings are stress
specifications only and functional operation of product at these condition or any conditions beyond those listed in the DC ElectricalCharacteristics or AC Electrical Characteristics is not implied. Exposure to absolute maximum rating conditions for extended periods may
affect product reliability.
TABLE 4A. DC ELECTRICAL CHARACTERISTICS, VDDI = VDDOX = 3.3V±5%, TA = 0°C TO 70°C
Bank Skew - Skew within a bank of outputs at the same supply voltages and with equal load conditions.
CLK
VDDO/2VDDO/2
Qx0
○○○○○○○○
tsk(b)tsk(b)
VDDO/2VDDO/2
Qx4
FIGURE 3A - BANK SKEW
fin = 200MHz, Vamp = 3.3V, tr = tf = 200ps
Output Skew - Skew across banks of outputs switching in the same direction at the same supply voltages and with equal load
conditions.
CLK
VDDO/2
QA0 - QA4
tsk(o)
VDDO/2
tsk(o)
VDDO/2
QB0 - QB4
QC0 - QC4
QD0 - QD4
8701-01www.icst.comREV. A - AUGUST 28, 2000
FIGURE 3B - INVERTING OUTPUT SKEW
fin = 200MHz, Vamp = 3.3V, tr = tf = 200ps
7
VDDO/2
Page 8
Integrated
Circuit
L
OW SKEW¸1, ¸2 CLOCK
ICS8701-01
Systems, Inc.
GENERAT O R W/POLARITY CONTROL
FIGURE 3C, 3D- SKEW DEFINITIONS & WAVEFORMS
Multiple Frequency Skew - Skew across banks of outputs switching in the same direction operating at different frequencies with
the same supply voltages and equal load conditions.
CLK
QA0 - QA4,
QB0 - QB4,
QC0 - QC4,
or
QD0 - QD4
in ÷1, inverting
QA0 - QA4,
QB0 - QB4,
QC0 - QC4,
or
QD0 - QD4
in ÷2, inverting
VDDO/2
tsk(w)
VDDO/2
FIGURE 3C - MULTIPLE FREQUENCY SKEW
fin = 200MHz, Vamp = 3.3V, tr = tf = 200ps
Part to Part Skew - Skew at different outputs switching in the same direction on different devices operating at the same supply
voltages and with equal load conditions.
CLK
PART 1 QA0 - QA4
QB0 - QB4
QC0 - QC4
QD0 - QD4
inverting
PART 2 QA0 - QA4
QB0 - QB4
QC0 - QC4
QD0 - QD4
inverting
VDDO/2VDDO/2
tsk(p)tsk(p)
VDDO/2VDDO/2
FIGURE 3B - OUTPUT SKEW
fin = 200MHz, Vamp = 3.3V, tr = tf = 200ps
8701-01www.icst.comREV. A - AUGUST 28, 2000
8
Page 9
Integrated
Circuit
Systems, Inc.
PACKAGE OUTLINEAND DIMENSIONS - Y S UFFIX
NOTE 4
NOTE 4
D
D
NOTE 5, 7
NOTE 5, 7
D1
D1
NOTE 3
NOTE 3
-D-
-D-
NOTE 3
NOTE 3
-A-
-A-
e
e
N/4 TIPS
N/4 TIPS
0.20 C A-B D4X
0.20 C A-B D4X0.20 C A-B D0.20 C A-B D4X
SEE DETAIL “A”
SEE DETAIL “A”
8 PLACES
8 PLACES
11 / 13°
11 / 13°
D/2
D/2
D1/2
D1/2
NOTE 3
NOTE 3
-B-
-B-
E/2
E/2
E1/2
E1/2
A
A
NOTE 2 / / 0.10 C
NOTE 2 / / 0.10 C
-H-
-H-
ccc
ccc
-C-
-C-
SEE DETAIL “B”
SEE DETAIL “B”
ICS8701-01
L
OW SKEW¸1, ¸2 CLOCK
GENERAT OR W/POLARITY CONTROL
-A, B, OR -D-
-A, B, OR -D-
b
b
E
E1
E
E1
N
N
N
N
O
O
O
O
T
T
T
T
E
E
E
E
4
4
5,
5,
7
7
NOTES:
1. ALL DIME NSIONS AND TOLERA NCING CONFORM TO ANSI
Y14.5-1982
2. DATUM PLANE -H- LOCATED AT MOLD PARTING LINE AND
COINCIDENT WITH LEAD, WHERE LEAD EXITS PLASTIC BODY
AT BOTTOM OF PARTING LINE.
3. DATUMS A-B AND -D- TO BE DETE RMINED AT CENTERLINE
BETWEEN LEADS WHERE LEADS EXIT PLASTIC AT DATUM
PLANE -H- .
4. TO BE DETERMINED AT SEATING PLACE -C- .
5. DIM ENSIONS D1 AND E1 DO NOT INCLUDE MOLD
PROT RUSION.
6. “N” IS THE TOTAL NUMBER OF TERMINALS.
7. THESE DIME NSIONS TO BE DETEREMINED AT DATUM PLANE
-H-.
8. PACKAGE TOP DIMENSIONS ARE SMALLER THAN BOTTOM
DIM ENSIONS AND TOP OF PACKAGE WILL NOT OVE R HANG
BOTTOM OF PACKAGE.
9. DIM ENSION b DOES NOT INCLUDE DAMBAR PROTRUSION.
ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.08mm TOTAL
IN EXCESS OF THE b DIMENSION AT MAXIMUM MATERIAL
CONDITION.
10. CO NTROLLING DIM ENSION: MILLIMET ER.
11. THIS OUTLINE CONFORM S TO JEDEC PUBL IBCATION 95
REGISTRATION M S-026, VA RIAT ION BBC.
12. A1 IS DEFINED AS THE DISTANCE FROM THE SEATING PLANE
TO THE LOWEST POINT OF THE PACKAGE.
While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems, Incorporated (ICS) assumes no responsibility for either its use or
for infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal
commercial applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are not recommended without additional processing by ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does not authorize or warrant any ICS product for use
in life support devices or critical medical instruments.
8701-01www.icst.comREV. A - AUGUST 28, 2000
10
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