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參數(shù)資料
| 型號(hào)： | SN54221W |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 諧振器 |
| 英文描述： | TTL/H/L SERIES, DUAL MONOSTABLE MULTIVIBRATOR, CDFP16 |
| 封裝： | CERAMIC, DFP-16 |
| 文件頁(yè)數(shù)： | 18/20頁(yè) |
| 文件大?。?/td> | 352K |
| 代理商： | SN54221W |
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SN54221, SN54LS221, SN74221, SN74LS221
DUAL MONOSTABLE MULTIVIBRATORS
WITH SCHMITT-TRIGGER INPUTS
SDLS213A – DECEMBER 1983 – REVISED FEBRUARY 1998
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
switching characteristics VCC = 5 V, RL = 400 , TA = 25_C (see Figures 1 and 2)
PARAMETER
FROM
TO
TEST CONDITIONS
SN54221
SN74221
UNIT
PARAMETER
(INPUT)
(OUTPUT)
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
tPLH
A
Q
45
70
45
70
tPLH
B
Q
C80 pF
R2 k
35
55
35
55
ns
tPHL
A
Q
Cext = 80 pF,
Rext = 2 k
50
80
50
80
ns
tPHL
B
Q
40
65
40
65
tPHL
CLR
Q
C80 pF
R2 k
27
ns
tPLH
CLR
Q
Cext = 80 pF,
Rext = 2 k
40
ns
Cext = 80 pF,
Rext = 2 k
70
110
150
70
110
150
t
AorB
QorQ
Cext = 0,
Rext = 2 k
17
30
50
17
30
50
ns
tw
A or B
Q or Q
Cext = 100 pF, Rext = 10 k
650
700
750
650
700
750
Cext = 1 F,
Rext = 10 k
6.5*
7
7.5*
6.5
7
7.5
ms
On products compliant to MIL-PRF-38535, this parameter is not production tested.
recommended operating conditions
SN54LS221
SN74LS221
UNIT
MIN
NOM
MAX
MIN
NOM
MAX
UNIT
VCC
Supply voltage
4.5
5
5.5
4.75
5
5.25
V
VIH
High-level input voltage
A input
2
V
VIL
Low-level input voltage
A input
0.7
0.8
V
IOH
High-level output current
–400
A
IOL
Low-level output current
4
8
mA
v/t
Rise or fall of input pulse rate
B input
1*
1
V/s
v/t
Rise or fall of input pulse rate
A input
1*
1
V/
s
TA
Operating free-air temperature
–55
125
0
70
°C
On products compliant to MIL-PRF-38535, this parameter is not production tested.
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