HD74LV221A Datasheet, PDF (1/14 Pages) Hitachi Semiconductor – Dual Monostable Multivibrators

HD74LV221A
Dual Monostable Multivibrators
REJ03D0326–0600Z
(Previous ADE-205-271D (Z))
Rev.6.00
Jun. 23, 2004
Description
The HD74LV221A features output pulse-duration control by three methods. In the first method, the A input is low and
the B input goes high. In the second method, the B input is high and the A input goes low. In the third method, the A
input is low, the B input is high, and the clear (CLR) input goes high.
The basic pulse duration is programmed by selecting external resistance and capacitance values. The external timing
capacitor must be connected between Cext and Rext/Cext (positive) and an external resistor connected between
Rext/Cext and V_CC.
To obtain variable pulse durations, connect an external variable resistance between Rext/Cext and V_CC. Pulse duration
can be reduced by taking CLR low.
Features
• V_CC = 2.0 V to 5.5 V operation
• All inputs V_IH (Max.) = 5.5 V (@V_CC = 0 V to 5.5 V)
• All outputs V_O (Max.) = 5.5 V (@V_CC = 0 V)
• Output current ±6 mA (@V_CC = 3.0 V to 3.6 V), ±12 mA (@V_CC = 4.5 V to 5.5 V)
• Ordering Information
Part Name
Package Type
Package Code
Package
Abbreviation
HD74LV221AFPEL
SOP–16 pin (JEITA) FP–16DAV
FP
HD74LV221ARPEL
SOP–16 pin (JEDEC) FP–16DNV
RP
HD74LV221ATELL
TSSOP–16 pin
TTP–16DAV
T
Note: Please consult the sales office for the above package availability.
Taping Abbreviation
(Quantity)
EL (2,000 pcs/reel)
EL (2,500 pcs/reel)
ELL (2,000 pcs/reel)
Function Table
Inputs
CLR
A
B
L
X
X
X
H
X
X
X
L
H
L
↑
H
↓
H
↑
L
H
Note: H: High level
L: Low level
X: Immaterial
↑: Low to high transition
↓: High to low transition
: High level pulse
: Low level pulse
Outputs
Q
Q
L
H
L
H
L
H
Rev.6.00 Jun. 23, 2004 page 1 of 13