NSC CGS74LCT2524MX, CGS74LCT2524M Datasheet
CGS74LCT2524
1 to 4 Minimum Skew (300 ps) 3V Clock Driver
General Description
This minimum skew clock driver is a 3V option of the current
CGS74CT2524 MinimumSkew Clock Driver and is designed
for Clock Generation and Support (CGS) applications operating at low voltage, 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. This minimum skew clock driver with one input
driving four outputs, is specifically designed for signal generation and clock distribution applications.
Features
n Ideal for low power/low noise high speed applications
n Guaranteed:
— 300 ps pin-to-pin skew (t
OSHL
and t
OSLH
)
n Implemented on National’s FACT
™
family process
n 1 input to 4 outputs low skew clock distribution
n Symmetric output current drive: 12 mA I
OH/IOL
n Industrial temperature of −40˚C to +85˚C
n 8-pin SOIC package
n Low dynamic power consumption above 20 MHz
n Guaranteed 2 kV ESD protection
Logic Symbol
Pin Description
Pin Names Description
CLK Clock Input
O
0–O3
Outputs
Truth Table
Inputs Outputs
CLK O
0–O3
LL
HH
L
=
Low Logic Level
H=High Logic Level
Connection Diagrams
FACT™is a trademark of National Semiconductor Corporation.
DS011956-1
The output pins act as a single entity and will follow the state of the CLK
when the clock distribution chip is selected.
Pin Assignment
SOIC (MO)
DS011956-2
DS011956-3
See NS Package Number M08A
January 2000
CGS74LCT2524 1 to 4 Minimum Skew (300 ps) 3V Clock Driver
© 2000 National Semiconductor Corporation DS011956 www.national.com
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (V
CC
) −0.5V to 7.0V
DC Input Voltage Diode Current (I
IK
)
V=−0.5V −20 mA
V=V
CC
+ 0.5V +20 mA
DC Input Voltage (V
I
) −0.5V to VCC+0.5V
DC Output Diode Current (I
O
)
V=−0.5V −20 mA
V=V
CC
+ 0.5V +20 mA
DC Output Voltage (V
O
) −0.5V to VCC+0.5V
DC Output Source or Sink Current
(I
O
)
±
50 mA
DC V
CC
or Ground Current
per Output Pin (I
CC
or I
GND
)
±
50 mA
Storage Temperature (T
STG
) −65˚C to +150˚C
Junction Temperature (θ
JA
)
Airflow 0 225 500 LFM
M 167 132 117 ˚C/W
Recommended Operating
Conditions
Supply Voltage (VCC) 3.0V to 3.6V
Input Voltage (V
IN
) 0VtoV
CC
Output Voltage (VO) 0VtoV
CC
Operating Temperature (TA)
Industrial −40˚C to +85˚C
Commercial 0˚C to +70˚C
Input Rise and Fall Times 9.6 ns max
(0.8V to 2.0V)
Note 1:
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 Conditions
V
CC
(V)
CGS74LCT2524
UnitsT
A
=
+25˚C
T
A
=
−40˚C to
+85˚C
Typ Guaranteed Limits
V
IH
Minimum High
Level
V
OUT
=
0.1V or V
CC
=
−0.1V
3.3 1.5 2.0 2.0 V
Input Voltage
V
IL
Maximum Low
Level
V
OUT
=
0.1V or V
CC
=
−0.1V
3.3 1.5 0.8 0.8 V
Input Voltage
V
OH
Minimum High
Level
V
IN
=
V
IL
or VIH,I
OUT
=
−50 µA 3.3 2.9 2.9 V
Output Voltage V
IN
=
V
IL
or VIH,I
OH
=
−12 mA 3.3 2.5 2.4 V
V
OL
Minimum Low Level V
IN
=
V
IL
or VIH,I
OUT
=
50 µA 3.3 0.1 0.1 V
Output Voltage V
IN
=
V
IL
or VIH,I
OL
=
−12 mA 3.3 0.3 0.4 V
I
IN
Maximum Input V
IN
=
V
CC
, GND 3.6
±
0.1
±
1.0 µA
Leakage Current
I
CCT
Maximum ICC/Input V
IN
=
2.4V 3.6 100 µA
I
OLD
Minimum Dynamic V
OLD
=
0.8V (max) 3.6 36 mA
I
OHD
Output Current V
OHD
=
2.0V (min) 3.6 −25 mA
I
CC
Maximum
Quiescent
V
IN
=
V
CC
or GND
3.6 2.5 10 µA
Supply Current
CGS74LCT2524
www.national.com 2
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