SN54-74LS390 ON Semiconductor, SN54-74LS390 Datasheet - Page 5

• Manufacturer Part Number: SN54-74LS390
• Description: DUAL DECADE COUNTER; DUAL 4-STAGE BINARY COUNTER
• Manufacturer: ON Semiconductor

AC SETUP REQUIREMENTS
t W
t W
t W
t W
t rec
S
Symbol
b l
*The number of Clock Pulses required between t PHL and t PLH measurements can be determined from the appropriate Truth Table.
Clock Pulse Width
CP 0 Pulse Width
CP 1 Pulse Width
MR Pulse Width
Recovery Time
P
Parameter
MR & MS
(T A = 25 C, V CC = 5.0 V)
*CP
Q
CP
LS393
LS390
LS390
LS390/393
LS390/393
Q
SN54/74LS390 SN54/74LS393
t PHL
1.3 V
t PHL
1.3 V
FAST AND LS TTL DATA
1.3 V
Min
20
20
40
20
25
AC WAVEFORMS
t W
Figure 1
Figure 2
1.3 V
Limits
5-5
Typ
1.3 V
t W
t rec
Max
1.3 V
1.3 V
U i
Unit
ns
ns
ns
ns
ns
1.3 V
t PLH
T
Test Conditions
V
V
V CC = 5.0 V
C
di i
5 0 V
5 0 V