MM74C48 データシートの表示（PDF） - Fairchild Semiconductor
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MM74C48 Datasheet PDF : 6 Pages
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AC Electrical Characteristics (Note 7)
TA = 25°C, CL = 50 pF, unless otherwise specified
Symbol
Parameter
Conditions
tpd0, tpd1
Propagation Delay to a “1” or “0” on
VCC = 5.0V
Segment Outputs from Data Inputs
VCC = 10V
tpd0
Propagation Delay to a “0” on
VCC = 5.0V
Segment Outputs from RB Input
VCC = 10V
tpd0
Propagation Delay to a “0” on
VCC = 5.0V
Segment Outputs from Blanking Input VCC = 10V
tpd1
Propagation Delay to a “1” on
VCC = 5.0V
Segment Outputs from Lamp Test
VCC = 10V
tpd1
Propagation Delay to a “1” on RB
VCC = 5.0V
Output from RB Input
VCC = 10V
tpd0
Propagation Delay to a “0” on RB
VCC = 5.0V
Output from RB Input
VCC = 10V
Note 7: AC Parameters are guaranteed by DC correlated testing.
Typical Applications
Typical Connection Utilizing
the Ripple-Blanking Feature
Min
Typ
Max
Units
450
1500
ns
160
500
ns
500
1600
ns
180
550
ns
350
1200
ns
140
450
ns
450
1500
ns
160
500
ns
600
2000
ns
250
800
ns
140
450
ns
50
150
ns
First three stages will blank leading zeros, the fourth stage will not blank zeros.
Blanking Input Connection Diagram
When RBO/BI is forced LOW, all segment outputs are off regardless of the state of any other input condition.
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