74HC221DB NXP Semiconductors, 74HC221DB Datasheet - Page 4
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74HC221DB
Manufacturer Part Number
74HC221DB
Description
Monostable Multivibrator DUAL MONOSTABLE MULTIVIBRATOR
Manufacturer
NXP Semiconductors
Datasheet
1.74HC221D652.pdf
(15 pages)
Specifications of 74HC221DB
Elements Per Chip
2
Logic Family
HC
Logic Type
Monostable Multivibrator
Package / Case
SSOP-16
Propagation Delay Time
220 ns, 44 ns, 37 ns
High Level Output Current
- 5.2 mA
Low Level Output Current
5.2 mA
Supply Voltage (max)
6 V
Supply Voltage (min)
2 V
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Operating Supply Voltage
5 V
Lead Free Status / Rohs Status
Details
Other names
74HC221DB,112
Philips Semiconductors
December 1990
Dual non-retriggerable monostable
multivibrator with reset
Fig.4 Functional diagram.
4
FUNCTION TABLE
Notes
1. H = HIGH voltage level
2. If the monostable was triggered before this condition
3. For this combination the reset input must be LOW and
nR
L = LOW voltage level
X = don’t care
was established the pulse will continue as
programmed.
the following sequence must be used:
pin 1 (or 9) must be set HIGH or pin 2 (or 10) set LOW;
then pin 1 (or 9) must be LOW and pin 2 (or 10) set
HIGH. Now the reset input goes from LOW-to-HIGH
and the device will be triggered.
H
H
L
X
X
= LOW-to-HIGH level
= HIGH-to-LOW level
D
= one HIGH-level output pulse
= one LOW-level output pulse
INPUTS
nA
X
X
H
L
L
nB
X
X
H
H
L
74HC/HCT221
nQ
L
L
L
Product specification
(2)
(2)
OUTPUTS
(3)
nQ
H
H
H
(2)
(2)
(3)