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參數(shù)資料
| 型號(hào)： | 74F670 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 4 x 4 register file 3-State |
| 中文描述： | 4 × 4寄存器三態(tài) |
| 文件頁數(shù)： | 6/12頁 |
| 文件大?。?/td> | 97K |
| 代理商： | 74F670 |
Philips Semiconductors
Product specification
74F670
4 x 4 register file (3-State)
1990 Jul 12
6
of a High output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any
sequence of parameter tests, I
OS
tests should be performed last.
AC ELECTRICAL CHARACTERISTICS
LIMITS
TEST
CONDITION
T
amb
= +25
°
C
= +5 0V
V
CC
= +5.0V
C
L
= 50pF,
R
L
= 500
TYP
T
amb
= 0
°
C to +70
°
C
= +5 0V
±
10%
V
CC
= +5.0V
C
L
= 50pF,
R
L
= 500
MIN
SYMBOL
PARAMETER
UNIT
MIN
MAX
MAX
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Propagation delay
RA, RB to Qn
Waveform 3, 4
3.5
4.0
5.5
5.5
9.0
8.5
3.0
3.5
10.0
9.9
ns
ns
Propagation delay
WE to Qn
Waveform 1, 2
5.0
6.5
7.0
8.5
10.0
11.5
4.5
6.0
11.0
12.5
ns
ns
Propagation delay
Dn to Qn
Waveform 1, 2
3.5
6.0
6.0
8.0
8.5
11.0
3.0
5.5
9.5
12.5
ns
ns
RE Enable time
Qn to High or Low level
Waveform 5
Waveform 6
3.0
4.5
7.0
6.5
12.0
9.0
2.5
4.0
13.0
10.0
ns
ns
RE Disable time
Qn to High or Low level
Waveform 5
Waveform 6
2.0
3.0
3.0
5.0
6.5
8.5
1.5
3.0
7.5
8.5
ns
ns
AC SETUP REQUIREMENTS
LIMITS
T
amb
= +25
°
C
V
CC
= +5.0V
C
L
= 50pF, R
L
= 500
MIN
TYP
T
amb
= 0
°
C to +70
°
C
V
CC
= +5.0V
±
10%
C
L
= 50pF, R
L
= 500
MIN
SYMBOL
PARAMETER
TEST CONDITION
UNIT
MAX
MAX
t
s
(H)
t
s
(L)
t
h
(H)
t
h
(L)
t
s
(H)
t
s
(L)
t
h
(H)
t
h
(L)
t
w
(L)
NOTES:
1. Write Address (WA, WB) setup time will protect the data written into the previous address. If protection of data in the previous address is not
required, setup time for Write Address to WE can be ignored. Any address selection sustained for the final 7ns of the WE pulse during hold
time for Write Address to WE will result in data being written into that location.
Setup time, High or Low
Dn to positive going WE
Waveform 3, 4
1.5
6.0
1.5
7.0
ns
ns
Hold time, High or Low
Dn to positive going WE
Waveform 3, 4
0
1.0
0
1.0
ns
ns
Setup time, High or Low
WA, WB to negative going WE
1
Waveform 3, 4
0
0
0
0
ns
ns
Hold time, High or Low
WA, WB to negative going WE
1
Waveform 3, 4
0
0
0
0
ns
ns
WE Pulse width, Low
Waveform 3, 4
6.5
8.5
ns
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