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 7V
Input Voltage 7V
Operating Free Air Temperature Range 0§Ctoa
70§C
Storage Temperature b65§Ctoa
150§C
Note:
The ‘‘Absolute Maximum Ratings’’ are those values
beyond which the safety of the device cannot be guaran-
teed. The device should not be operated at these limits. The
parametric values defined in the ‘‘Electrical Characteristics’’
table are not guaranteed at the absolute maximum ratings.
The ‘‘Recommended Operating Conditions’’ table will define
the conditions for actual device operation.
Recommended Operating Conditions
Symbol Parameter Min Nom Max Units
VCC Supply Voltage 4.75 5 5.25 V
VIH High Level Input Voltage 2 V
VIL Low Level Input Voltage 0.8 V
IOH High Level Output Current b0.4 mA
IOL Low Level Output Current 8 mA
tWPulse Width A or B High 40
(Note 6) A or B Low 40 ns
Clear Low 40
REXT External Timing Resistor 5 260 kX
CEXT External Timing Capacitance No Restriction mF
CWIRE Wiring Capacitance 50 pF
at REXT/CEXT Terminal
TAFree Air Operating Temperature 0 70 §C
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol Parameter Conditions Min Typ Max Units
(Note 1)
VIInput Clamp Voltage VCC eMin, IIeb
18 mA b1.5 V
VOH High Level Output VCC eMin, IOH eMax 2.7 3.4 V
Voltage VIL eMax, VIH eMin
VOL Low Level Output VCC eMin, IOL eMax 0.35 0.5
Voltage VIL eMax, VIH eMin V
IOL e4 mA, VCC eMin 0.25 0.4
IIInput Current @Max VCC eMax, VIe7V 0.1 mA
Input Voltage
IIH High Level Input Current VCC eMax, VIe2.7V 20 mA
IIL Low Level Input Current VCC eMax, VIe0.4V b0.4 mA
IOS Short Circuit VCC eMax b20 b100 mA
Output Current (Note 2)
ICC Supply Current VCC eMax (Notes 3,4 and 5) 12 20 mA
Note 1: All typicals are at VCC e5V, TAe25§C.
Note 2: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 3: Quiescent ICC is measured (after clearing) with 2.4V applied to all clear and A inputs, B inputs grounded, all outputs open, CEXT e0.02 mF, and
REXT e25 kX.
Note 4: ICC is measured in the triggered state with 2.4V applied to all clear and B inputs, A inputs grounded, all outputs open, CEXT e0.02 mF, and REXT e25 kX.
Note 5: With all outputs open and 4.5V applied to all data and clear inputs, ICC is measured after a momentary ground, then 4.5V is applied to the clock.
Note 6: TAe25§C and VCC e5V.
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