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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 |
| 文件頁數(shù)： | 17/20頁 |
| 文件大?。?/td> | 352K |
| 代理商： | SN54221W |
SN54221, SN54LS221, SN74221, SN74LS221
DUAL MONOSTABLE MULTIVIBRATORS
WITH SCHMITT-TRIGGER INPUTS
SDLS213A – DECEMBER 1983 – REVISED FEBRUARY 1998
6
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54221
SN74221
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
VT+
Positive-going threshold voltage,
B input
VCC = MIN
1.55
2*
1.55
2
V
VT–
Negative-going threshold voltage,
B input
VCC = MIN
0.8*
1.35
0.8
1.35
V
VIK
VCC = MIN,
II = –12 mA
–1.5
V
VOH
VCC = MIN,
IOH = –800 A
2.4
3.4
2.4
3.4
V
VOL
VCC = MIN,
IOL = 16 mA
0.2
0.4
0.2
0.4
V
II
VCC = MAX,
VI = 5.5 V
1
mA
I
A input
VCC = MAX
VI =2 4V
40
A
IIH
CLR, B input
VCC = MAX,
VI = 2.4 V
80
A
I
A input
VCC = MAX
VI =0 4V
–1.6
mA
IIL
CLR, B input
VCC = MAX,
VI = 0.4 V
–3.2
mA
IOS§
VCC = MAX
–20
–55
–18
–55
mA
ICC
Quiescent
VCC = MAX
26
50*
26
50
mA
ICC
Triggered
VCC = MAX
46
80*
46
80
mA
On products compliant to MIL-PRF-38535, this parameter is not production tested.
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
All typical values are at VCC = 5 V, TA = 25°C.
§ Not more than one output should be shorted at a time and the duration of the short circuit should not exceed one second.
timing requirements over recommended ranges of supply voltage and operating free-air
temperature
SN54221
SN74221
UNIT
MIN
MAX
MIN
MAX
UNIT
t
Pulse duration
A or B input
50
ns
tw
Pulse duration
CLR
20
ns
tsu
Setup time, inactive-state
CLR
15
ns
Rext
External timing resistance
1.4*
30*
1.4
40
k
Cext
External timing capacitance
0*
1000*
0
1000
F
Output duty cycle
Rext = 2 k
67%
Output duty cycle
Rext = MAX Rext
90%
On products compliant to MIL-PRF-38535, this parameter is not production tested.
Inactive-state setup time is also referred to as recovery time.
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