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SN74LS221N

Part # SN74LS221N
Description DUAL MONOSTABLE MULTIVIBRATOR- Rail/Tube
Category IC
Availability In Stock
Qty 205
Qty Price
1 - 43 $0.78963
44 - 86 $0.63170
87 - 129 $0.52116
130 - 172 $0.48431
173 + $0.43166
Manufacturer Available Qty
Motorola Corp
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Motorola Corp
Date Code: 9201
  • Shipping Freelance Stock: 116
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Motorola Corp
Date Code: 9103
  • Shipping Freelance Stock: 19
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ON Semiconductor
Date Code: 0136
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Texas Instruments
  • Shipping Freelance Stock: 19
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Texas Instruments
  • Shipping Freelance Stock: 13
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Texas Instruments
Date Code: 9432
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Texas Instruments
  • Shipping Freelance Stock: 10
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Texas Instruments
Date Code: 9336
  • Shipping Freelance Stock: 3
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Texas Instruments
Date Code: 9336
  • Shipping Freelance Stock: 7
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Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

5-383
FAST AND LS TTL DATA
SN54/74LS221
AC CHARACTERISTICS (V
CC
= 5.0 V, T
A
= 25°C)
Limits
Unit
Test Conditions
Min Typ Max
Unit
Test Conditions
A Q 45 70
ns
C
L
= 15 pF,
See Figure 1
C
ext
= 80 pF, R
ext
= 2.0 Ω
B Q 35 55
ns
C
L
= 15 pF,
See Figure 1
C
ext
= 80 pF, R
ext
= 2.0 Ω
A Q 50 80
ns
C
L
= 15 pF,
See Figure 1
C
ext
= 80 pF, R
ext
= 2.0 Ω
B Q 40 65
ns
C
L
= 15 pF,
See Figure 1
C
ext
= 80 pF, R
ext
= 2.0 Ω
t
PHL
Clear Q 35 55 ns
C
L
= 15 pF,
See Figure 1
t
PLH
Clear Q 44 65 ns
C
L
= 15 pF,
See Figure 1
70 120 150
ns
C
ext
= 80 pF, R
ext
= 2.0 Ω
20 47 70
ns
C
ext
= 0, R
ext
= 2.0 kΩ
600 670 750 C
ext
= 100 pF, R
ext
= 10 kΩ
6.0 6.9 7.5 ms C
ext
= 1.0 µF, R
ext
= 10 kΩ
AC SETUP REQUIREMENTS (V
CC
= 5.0 V, T
A
= 25°C)
Symbol
Parameter
Limits
Symbol
Parameter
Min Typ Max
dv/dt
Rate of Rise or Fall of Input Pulse
dv/dt
Schmitt, B 1.0 V/s
dv/dt
Logic Input, A 1.0 V/µs
t
W
Input Pulse Width
t
W
A or B, t
W(in)
40 ns
t
W
Clear, t
W
(clear) 40
t
s
Clear-Inactive-State Setup Time 15 ns
R
ext
External Timing Resistance
54 1.4 70
R
ext
External Timing Resistance
74 1.4 100
C
ext
External Timing Capacitance 0 1000 µF
Output Duty Cycle
RT = 2.0 kΩ 50 %
R
T
= MAX R
ext
90
5-384
FAST AND LS TTL DATA
SN54/74LS221
AC WAVEFORMS
≥
≥
≥
≥
≥≥
TRIGGER FROM B, THEN CLEAR — CONDITION 1
TRIGGER FROM B, THEN CLEAR — CONDITION 2
CLEAR OVERRIDING B, THEN TRIGGER FROM B
TRIGGERING FROM POSITIVE TRANSITION OF CLEAR
Figure 1
5-385
FAST AND LS TTL DATA
°
°
°
°
1
8
916
-A-
-B-
P
D
-T-
K
C
G
M
R X 45°
F
J
Case 751B-03 D Suffix
16-Pin Plastic
SO-16
Case 648-08 N Suffix
16-Pin Plastic
°
°
°
°
-A-
B
1 8
916
F
H
G
D
S
C
-T-
K
J
M
L
Case 620-09 J Suffix
16-Pin Ceramic Dual In-Line
°
°
°
°
-B-
-A-
-T-
C
D
E
F G
J
K
M
N
L
16 9
1 8
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