SN74LS290D Motorola, SN74LS290D Datasheet - Page 5

• Manufacturer Part Number: SN74LS290D
• Description: DECADE COUNTER 4-BIT BINARY COUNTER
• Manufacturer: Motorola

AC CHARACTERISTICS
AC SETUP REQUIREMENTS
RECOVERY TIME (t rec ) is defined as the minimum time required between the end of the reset pulse and the clock transition form HIGH-to-LOW in order to
recognize and transfer HIGH data to the Q outputs.
MR & MS
f MAX
f MAX
t PLH
t PHL
t PLH
t PHL
t PLH
t PHL
t PLH
t PHL
t PLH
t PHL
t PHL
t PHL
t PHL
t W
t W
t W
t W
t rec
Symbol
Symbol
Symbol
Symbol
Symbol
Symbol
CP
Q
*The number of Clock Pulses required between the t PHL and t PLH measurements can be determined from the appropriate Truth Tables.
t PHL
1.3 V
CP 0 Input Clock Frequency
CP 1 Input Clock Frequency
Propagation Delay,
CP 0 Input to Q 0 Output
CP 0 Input to Q 3 Output
CP 1 Input to Q 1 Output
CP 1 Input to Q 2 Output
CP 1 Input to Q 3 Output
MS Input to Q 0 and Q 3 Outputs
MS Input to Q 1 and Q 2 Outputs
MR Input to Any Output
CP 0 Pulse Width
CP 1 Pulse Width
MS Pulse Width
MR Pulse Width
Recovery Time MR to CP
t W
Figure 2
(T A = 25 C, V CC = 5.0 V, C L = 15 pF)
1.3 V
Parameter
Parameter
Parameter
(T A = 25 C, V CC = 5.0 V)
1.3 V
t rec
*CP
Q
SN54/74LS290
Parameter
Parameter
Parameter
1.3 V
t PHL
1.3 V
1.3 V
FAST AND LS TTL DATA
AC WAVEFORMS
Figure 1
Min
32
16
5-470
t W
D
SN54/74LS293
LS290
Typ
10
12
32
34
10
14
21
23
21
23
20
26
26
1.3 V
Q 0 Q 3
(LS290)
Max
Min
16
18
48
50
16
21
32
35
32
35
30
40
40
15
30
15
15
25
MS
t PLH
1.3 V
CP
Limits
LS290
Max
Min
32
16
t PLH
1.3 V
Limits
LS293
Typ
Min
10
12
46
46
10
14
21
23
34
34
26
15
30
15
25
LS293
t W
Figure 3
Max
Max
1.3 V
16
18
70
70
16
21
32
35
51
51
40
1.3 V
1.3 V
t rec
MHz
MHz
Unit
Unit
Unit
Unit
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns