TC74HC670AF Просмотр технического описания (PDF) - Toshiba
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TC74HC670AF Datasheet PDF : 10 Pages
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TC74HC670AP/AF
Timing Requirements (input: tr = tf = 6 ns)
Characteristics
Symbol
Minimum pulse width
( WE )
Minimum set-up time
(Dn- WE )
Minimum set-up time
(WA, WB- WE )
Minimum hold time
(Dn- WE )
Minimum hold time
(WA, WB- WE )
Minimum latch time
( WE -RA, RB)
tW (L)
ts
ts
th
th
tlatch
Test Condition
VCC (V)
2.0
⎯
4.5
6.0
2.0
⎯
4.5
6.0
2.0
⎯
4.5
6.0
2.0
⎯
4.5
6.0
2.0
⎯
4.5
6.0
2.0
(Note) 4.5
6.0
Ta = 25°C
Ta =
−40 to
85°C Unit
Typ. Limit Limit
⎯
75
95
⎯
15
19
ns
⎯
13
16
⎯
50
65
⎯
10
13
ns
⎯
9
11
⎯
0
0
⎯
0
0
ns
⎯
0
0
⎯
5
5
⎯
5
5
ns
⎯
5
5
⎯
0
0
⎯
0
0
ns
⎯
0
0
⎯
75
95
⎯
15
19
ns
⎯
13
16
Note:
tlatch is the time allowed for the internal output of the latch to assume the state of new data.
This is important only when attempting to read from a location immediately after that location has received
new data.
AC Characteristics (CL = 15 pF, VCC = 5 V, Ta = 25°C, input: tr = tf = 6 ns)
Characteristics
Symbol
Test Condition
Min Typ. Max Unit
Output transition time
Propagation delay time
(RA, AB-Qn)
Propagation delay time
( WE -Qn)
Propagation delay time
(Dn-Qn)
3-state output enable time
3-state output disable time
tTLH
⎯
tTHL
tpLH
⎯
tpHL
tpLH
⎯
tpHL
tpLH
⎯
tpHL
tpZL
tpZH
RL = 1 kΩ
tpLZ
tpHZ
RL = 1 kΩ
⎯
4
8
ns
⎯
23
34
ns
⎯
24
38
ns
⎯
22
32
ns
⎯
11
18
ns
⎯
11
15
ns
6
2007-10-01
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