參數資料
型號: MC74AC256D
廠商: MOTOROLA INC
元件分類: 通用總線功能
英文描述: DUAL 4-BIT ADDRESSABLE LATCH
中文描述: AC SERIES, LOW LEVEL TRIGGERED D LATCH, TRUE OUTPUT, PDSO16
封裝: 751B-05
文件頁數: 6/7頁
文件大?。?/td> 232K
代理商: MC74AC256D
MC74AC256 MC74ACT256
5-6
FACT DATA
AC CHARACTERISTICS
(For Figures and Waveforms — See Section 3)
Symbol
Parameter
(V)
74ACT
74ACT
Unit
No.
VCC*
TA = +25
°
C
CL = 50 pF
TA = –40
°
C
to +85
°
C
CL = 50 pF
Fig.
Min
Typ
Max
Min
Max
tPLH
Propagation Delay
Dn to Qn
Propagation Delay
Dn to Qn
Propagation Delay
E to Qn
Propagation Delay
E to Qn
Propagation Delay
Address to Qn
Propagation Delay
Address to Qn
Propagation Delay
MR to Q
5.0
2.0
6.5
11.5
1.5
13.0
ns
3-5
tPHL
5.0
2.0
7.0
11.0
1.5
12.5
ns
3-5
tPLH
5.0
2.0
8.0
12.0
1.5
14.0
ns
3-6
tPHL
5.0
2.0
6.5
10.5
1.5
12.5
ns
3-6
tPLH
5.0
2.0
10.5
14.5
1.5
17.0
ns
3-6
tPHL
5.0
2.0
9.0
12.5
1.5
14.5
ns
3-6
tPHL
5.0
2.0
7.0
10.5
1.5
11.5
ns
3-7
* Voltage Range 5.0 V is 5.0 V
±
0.5 V.
AC OPERATING REQUIREMENTS
Symbol
Parameter
(V)
74ACT
74ACT
Unit
No.
VCC*
TA = +25
°
C
CL = 50 pF
TA = –40
°
C
to +85
°
C
CL = 50 pF
Fig.
Typ
Guaranteed Minimum
ts
Setup Time, HIGH or LOW
Dn to E
Hold Time, HIGH or LOW
Dn to E
Setup Time
Address to E
5.0
3.5
4.5
ns
3-9
th
5.0
2.5
2.5
ns
3-9
ts
5.0
5.5
6.5
ns
3-6
th
Hold Time
Address to E
5.0
2.5
2.5
ns
3-6
* Voltage Range 5.0 V is 5.0 V
±
0.5 V.
CAPACITANCE
Symbol
Parameter
Value
Typ
Unit
Test Conditions
CIN
Input Capacitance
4.5
pF
VCC = 5.0 V
CPD
Power Dissipation Capacitance
30.0
pF
VCC = 5.0 V
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