NSC CGS74CT2524MX, CGS74CT2524M Datasheet
TL/F/11752
CGS74CT2524 1 to 4 Minimum Skew (300 ps) Clock Driver
September 1995
CGS74CT2524
1 to 4 Minimum Skew (300 ps) Clock Driver
General Description
These minimum skew clock drivers are designed for Clock
Generation and Support (CGS) applications operating at
high frequencies. This device guarantees minimum output
skew across the outputs of a given device.
Skew parameters are also provided as a means to measure
duty cycle requirements as those found in high speed clocking systems. The CGS74CT2524 is a minimum skew clock
driver with one input driving four outputs, specifically designed for signal generation and clock distribution applications.
Features
Y
Guaranteed 300 ps pin-to-pin skew (t
OSHL
and t
OSLH
)
Y
Implemented on National’s FACTTMfamily process
Y
1 input to 4 outputs low skew clock distribution
Y
Symmetric output current drive: 24 mA IOH/I
OL
Y
Industrial temperature ofb40§Ctoa85§C
Y
8-pin SOIC package
Y
Low dynamic power consumption above 20 MHz
Y
Guaranteed 2 kV ESD protection
Logic Symbol
TL/F/11752– 1
The output pins act as a single entity and will follow the state of the CLK
when the clock distribution chip is selected.
Pin Description
Pin Names Descripton
CLK Clock Input
O
0–O3
Outputs
Truth Table
Inputs Outputs
CLK O0–O
3
LL
HH
L
e
Low Logic Level
H
e
High Logic Level
Connection Diagrams
Pin Assignment
SOIC (M)
TL/F/11752– 2
TL/F/11752– 3
FACTTMis a trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.
Absolute Maximum Ratings (Note)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Supply Voltage (V
CC
)
b
0.5 to 7.0V
DC Input Voltage Diode Current (IIK)
V
eb
0.5V
b
20 mA
V
e
V
CC
a
0.5V
a
20 mA
DC Input Voltage (VI)
b
0.5V to (V
CC
a
0.5V)
DC Output Diode (Current) (IO)
V
eb
0.5V
b
20 mA
V
e
V
CC
a
0.5V
a
20 mA
DC Output Voltage (VO)
b
0.5V to (V
CC
a
0.5V)
DC Output Source
or Sink Current (I
O
)
g
50 mA
DC VCCor Ground Current
per Output Pin (I
CC
or I
GND
)
g
50 mA
Storage Temperature (T
STG
)
b
65§Ctoa150§C
Junction Temperature (i
JA
) 0 225 500 LFM
M 167 132 117
§
C/W
N 115 79 62
§
C/W
Recommended Operating
Conditions
Supply Voltage (VCC) 4.5V to 5.5V
Input Voltage (VI) 0VtoV
CC
Output Voltage (VO) 0 to V
CC
Operating Temperature (TA)
b
40§Ctoa85§C
Input Rise and Fall Times
(0.8V to 2.0V) 9.6 ns max
NOTE:
The Absolute Maximum Ratings are those values
beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The
parametric values defined in the DC and AC Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The Recommended Operating Conditions will
define the conditions for actual device operation.
DC Electrical Characteristics
Over recommended operating conditions unless specified otherwise.
Symbol Parameter
V
CC
(V)
CGS74CT2524
Units Conditions
T
A
ea
25§CT
A
eb
40§Ctoa85§C
Typ Guaranteed Limits
V
IH
Minimum High Level 4.5 1.5 2.0 2.0
V
V
OUT
e
0.1V
Input Voltage 5.5 1.5 2.0 2.0 or V
CC
eb
0.1V
V
IL
Maximum Low Level 4.5 1.5 0.8 0.8
V
V
OUT
e
0.1V
Input Voltage 5.5 1.5 0.8 0.8 or V
CC
eb
0.1V
V
OH
Minimum High Level 4.5 4.49 4.4 4.4
V
V
IN
e
V
IH
Output Voltage 5.5 5.49 5.4 5.4 I
OUT
eb
50 mA
4.5 3.86 3.76
V
V
IN
e
V
IH
5.5 4.86 4.76 I
OH
eb
24 mA
V
OL
Minimum Low Level 4.5 0.001 0.1 0.1
V
V
IN
e
V
IL
Output Voltage 5.5 0.001 0.1 0.1 I
OUT
e
50 mA
4.5 0.36 0.44
V
V
IN
e
V
IL
5.5 0.36 0.44 I
OL
e
24 mA
I
IN
Maximum Input
5.5
g
0.1
g
1.0 mA
V
I
e
VCC, GND
Leakage Current
I
CC
T
Maximum ICC/Input 5.5 0.6 1.5 mA V
I
e
V
CC
b
2.1V
I
OLD
Minimum Dynamic 5.5 75 mA V
OLD
e
1.65V Max
I
OHD
Output Current
5.5
b
75 mA V
OHD
e
3.85V Min
I
CC
Maximum Quiescent
5.5 8.0 80 mA
V
IN
e
V
CC
Supply Current or GND
2
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