參數(shù)資料
型號: 31402B2A
廠商: Texas Instruments, Inc.
英文描述: DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT TRIGGER INPUTS
中文描述: 施密特觸發(fā)輸入與雙單穩(wěn)態(tài)多頻振蕩器
文件頁數(shù): 6/23頁
文件大?。?/td> 620K
代理商: 31402B2A
SDLS213B DECEMBER 1983 REVISED NOVEMBER 2004
6
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54221
TYP
SN74221
TYP
UNIT
MIN
MAX
MIN
MAX
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
VOH
VOL
II
VCC = MIN,
VCC = MIN,
VCC = MIN,
VCC = MAX,
II = 12 mA
IOH = 800
μ
A
IOL = 16 mA
VI = 5.5 V
1.5
1.5
V
2.4
3.4
2.4
3.4
V
0.2
0.4
0.2
0.4
V
1
1
mA
IIH
A input
VCC = MAX,
VI = 2.4 V
40
40
CLR, B input
80
80
μ
A
IIL
A input
VCC = MAX,
VI = 0.4 V
1.6
1.6
mA
CLR, B input
3.2
3.2
IOS§
VCC = MAX
20
55
18
55
mA
ICC
Quiescent
Triggered
VCC = MAX
26
46
50*
80*
26
46
50
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
50
MAX
MIN
50
MAX
tw
Pulse duration
A or B input
ns
CLR
20
20
tsu
Rext
Cext
Setup time, inactive-state
CLR
15
15
ns
External timing resistance
1.4*
30*
1.4
40
k
External timing capacitance
0*
1000*
0
1000
μ
F
Output duty cycle
Rext = 2 k
Rext = MAX Rext
67%
90%
67%
90%
On products compliant to MIL-PRF-38535, this parameter is not production tested.
Inactive-state setup time also is referred to as recovery time.
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