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SN74221 Datasheet(PDF) 7 Page - Texas Instruments

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Part # SN74221
Description  DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

SN74221 Datasheet(HTML) 7 Page - Texas Instruments

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SN54221, SN54LS221, SN74221, SN74LS221
DUAL MONOSTABLE MULTIVIBRATORS
WITH SCHMITT TRIGGER INPUTS
SDLS213B − DECEMBER 1983 − REVISED NOVEMBER 2004
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
switching characteristics VCC = 5 V, RL = 400 Ω, TA = 25_C (see Figures 1 and 2)
PARAMETER
FROM
TO
TEST CONDITIONS
SN54221
SN74221
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
tPLH
A
Q
45
70
45
70
tPLH
B
Q
Cext = 80 pF,
Rext = 2 kΩ
35
55
35
55
ns
tPHL
A
Q
Cext = 80 pF,
Rext = 2 kΩ
50
80
50
80
ns
tPHL
B
Q
40
65
40
65
tPHL
CLR
Q
Cext = 80 pF,
Rext = 2 kΩ
27
27
ns
tPLH
CLR
Q
Cext = 80 pF,
Rext = 2 kΩ
40
40
ns
Cext = 80 pF,
Rext = 2 kΩ
70
110
150
70
110
150
tw
A or B
Q or Q
Cext = 0,
Rext = 2 kΩ
17
30
50
17
30
50
ns
tw
A or B
Q or Q
Cext = 100 pF, Rext = 10 kΩ
650
700
750
650
700
750
ns
Cext = 1 µF,
Rext = 10 kΩ
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 (see Note 4)
SN54LS221
SN74LS221
UNIT
MIN
NOM
MAX
MIN
NOM
MAX
UNIT
VCC
Supply voltage
4.5
5
5.5
4.75
5
5.25
V
IOH
High-level output current
−400
−400
µA
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/
µs
TA
Operating free-air temperature
−55
125
0
70
°C
∗ On products compliant to MIL-PRF-38535, this parameter is not production tested.
NOTE 4: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.


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