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參數(shù)資料
| 型號： | SN54F21J |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 8Kx8 Nonvolatile SRAM, 10% Voltage Tolerance 28-DIP MODULE -40 to 85 |
| 中文描述： | 雙4輸入陽性與門 |
| 文件頁數(shù)： | 3/5頁 |
| 文件大?。?/td> | 67K |
| 代理商： | SN54F21J |
SN54HC20, SN74HC20
DUAL 4-INPUT POSITIVE-NAND GATES
SCLS086D – DECEMBER 1982 – REVISED FEBRUARY 2000
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
TA = 25
°
C
TYP
1.998
SN54HC20
MIN
1.9
SN74HC20
MIN
1.9
UNIT
MIN
1.9
MAX
MAX
MAX
2 V
IOH = –20
μ
A
4.5 V
4.4
4.499
4.4
4.4
VOH
VI = VIH or VIL
6 V
5.9
5.999
5.9
5.9
V
IOH = –4 mA
IOH = –5.2 mA
4.5 V
3.98
4.3
3.7
3.84
6 V
5.48
5.8
5.2
5.34
2 V
0.002
0.1
0.1
0.1
IOL = 20
μ
A
4.5 V
0.001
0.1
0.1
0.1
VOL
VI = VIH or VIL
6 V
0.001
0.1
0.1
0.1
V
IOL = 4 mA
IOL = 5.2 mA
4.5 V
0.17
0.26
0.4
0.33
6 V
0.15
±
0.1
0.26
±
100
0.4
0.33
±
1000
II
ICC
Ci
VI = VCC or 0
VI = VCC or 0,
6 V
±
1000
nA
μ
A
pF
IO = 0
6 V
2
40
20
2 V to 6 V
3
10
10
10
switching characteristics over recommended operating free-air temperature range, C
L
= 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
VCC
TA = 25
°
C
TYP
SN54HC20
MIN
SN74HC20
MIN
UNIT
(OUTPUT)
MIN
MAX
110
MAX
165
MAX
140
2 V
45
tpd
A, B, C, or D
Y
4.5 V
14
22
33
28
ns
6 V
11
19
28
24
2 V
27
75
110
95
tt
Y
4.5 V
6 V
9
7
15
13
22
19
19
16
ns
operating characteristics, T
A
= 25
°
C
PARAMETER
TEST CONDITIONS
TYP
UNIT
Cpd
Power dissipation capacitance
No load
25
pF
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