HD74LV123A
Dual Retriggerable Monostable Multivibrators
REJ03D0314–0600Z
(Previous ADE-205-258D (Z))
Rev.6.00
Jun. 02, 2004
Description
The HD74LV123A 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 Vcc
To obtain variable pulse durations, connect an external variable resistance between Rext/Cext and Vcc.
Once triggered, the basic pulse duration can be extended by retriggering the gated low-level-active (A) or high-level-
active (B) input. 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
Package Type
SOP–16 pin(JEITA)
SOP–16 pin(JEDEC)
TSSOP–16 pin
Package Code
FP–16DAV
FP–16DNV
TTP–16DAV
Package
Abbreviation
FP
RP
T
Taping Abbreviation
(Quantity)
EL (2,000 pcs/reel)
EL (2,500 pcs/reel)
ELL (2,000 pcs/reel)
Part Name
HD74LV123AFPEL
HD74LV123ARPEL
HD74LV123ATELL
Note: Please consult the sales office for the above package availability.
Rev.6.00 Jun. 02, 2004 page 1 of 15
HD74LV123A
Function Table
Inputs
CLR
L
H
H
H
H
↑
Note: H:
L:
X:
↑:
↓:
:
:
A
X
H
X
L
↓
L
High level
Low level
Immaterial
Low to high transition
High to low transition
High level pulse
Low level pulse
B
X
X
L
↑
H
H
Outputs
Q
L
L
L
Q
H
H
H
Pin Arrangement
1A 1
1B
1CLR
2
3
16 V
CC
15 1Rext / Cext
14 1Cext
13 1Q
12 2Q
11 2CLR
10 2B
9 2A
1Q 4
2Q
2Cext
2Rext / Cext
5
6
7
GND 8
(Top view)
Rev.6.00 Jun. 02, 2004 page 2 of 15
HD74LV123A
Absolute Maximum Ratings
Item
Supply voltage range
Input voltage range*
Output voltage range*
1, 2
Input clamp current
Output clamp current
Continuous output current
Continuous current through
V
CC
or GND
Maximum power dissipation at
Ta = 25°C (in still air)*
3
Storage temperature
1
Symbol
V
CC
V
I
V
O
I
IK
I
OK
I
O
I
CC
or I
GND
P
T
Tstg
Ratings
–0.5 to 7.0
–0.5 to 7.0
–0.5 to V
CC
+ 0.5
–0.5 to 7.0
–20
±50
±25
±50
785
500
–65 to 150
Unit
V
V
V
mA
mA
mA
mA
mW
°C
Conditions
Output: H or L
V
CC
: OFF
V
I
< 0
V
O
< 0 or V
O
> V
CC
V
O
= 0 to V
CC
SOP
TSSOP
Notes: The absolute maximum ratings are values, which must not individually be exceeded, and furthermore, no two of
which may be realized at the same time.
1. The input and output voltage ratings may be exceeded if the input and output clamp-current ratings are
observed.
2. This value is limited to 5.5 V maximum.
3. The maximum package power dissipation was calculated using a junction temperature of 150°C.
Recommended Operating Conditions
Item
Supply voltage range
Input voltage range
Output voltage range
Output current
Symbol
V
CC
V
I
V
O
I
OH
Min
2.0
0
0
—
—
—
—
—
—
—
—
0
0
0
5
1
—
1
–40
Typ
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Unlimited
—
—
Max
5.5
5.5
V
CC
–50
–2
–6
–12
50
2
6
12
200
100
20
—
—
—
—
85
Unit
V
V
V
µA
mA
Conditions
I
OL
µA
mA
Input transition rise or fall rate
∆t
/∆v
ns/V
V
CC
= 2.0 V
V
CC
= 2.3 to 2.7 V
V
CC
= 3.0 to 3.6 V
V
CC
= 4.5 to 5.5 V
V
CC
= 2.0 V
V
CC
= 2.3 to 2.7 V
V
CC
= 3.0 to 3.6 V
V
CC
= 4.5 to 5.5 V
V
CC
= 2.3 to 2.7 V
V
CC
= 3.0 to 3.6 V
V
CC
= 4.5 to 5.5 V
V
CC
= 2.0 V
V
CC
≥
2.3 V
External timing resistance
External timing capacitance
Power-up ramp rate
Operating free-air temperature
Rext
Cext
∆t
/∆V
CC
Ta
kΩ
F
ms/
V
°C
Note: Unused or floating inputs must be held high or low.
Rev.6.00 Jun. 02, 2004 page 3 of 15
HD74LV123A
Logic Diagram
Cext
Rext/
Cext
A
Q
Q
B
Q
CLR
CLR
Q
Rev.6.00 Jun. 02, 2004 page 4 of 15
HD74LV123A
DC Electrical Characteristics
Ta = –40 to 85°C
Item
Input voltage
Symbol
V
IH
V
CC
(V)*
2.0
2.3 to 2.7
3.0 to 3.6
4.5 to 5.5
2.0
2.3 to 2.7
3.0 to 3.6
4.5 to 5.5
Min to Max
2.3
3.0
4.5
Min to Max
2.3
3.0
4.5
0 to 5.5
5.5
5.5
2.3
3.0
4.5
5.5
0
3.3
Min
1.5
V
CC
×
0.7
V
CC
×
0.7
V
CC
×
0.7
—
—
—
—
V
CC
– 0.1
2.0
2.48
3.8
—
—
—
—
—
—
—
—
—
—
—
—
—
Typ
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
4.0
Max
—
—
—
—
0.5
V
CC
×
0.3
V
CC
×
0.3
V
CC
×
0.3
—
—
—
—
0.1
0.4
0.44
0.55
±1
±2.5
20
220
280
650
975
5
—
Unit
V
Test Conditions
V
IL
Output voltage
V
OH
V
V
OL
Input current
Input current
Rext / Cext
Quiescent supply
current
Active state supply
current
(per circuit)
Output leakage
current
Input capacitance
I
IN
I
IN
I
CC
∆I
CC
µA
µA
µA
µA
I
OH
= –50
µA
I
OH
= –2 mA
I
OH
= –6 mA
I
OH
= –12 mA
I
OL
= 50
µA
I
OL
= 2 mA
I
OL
= 6 mA
I
OL
= 12 mA
V
IN
= 5.5 V or GND
V
IN
= V
CC
or GND
V
IN
= V
CC
or GND, I
O
= 0
V
IN
= V
CC
or GND
Rext/Cext = 0.5 V
CC
I
OFF
C
IN
µA
pF
V
I
or V
O
= 0 V to 5.5 V
V
I
= V
CC
or GND
Note: For conditions shown as Min or Max, use the appropriate values under recommended operating conditions.
Rev.6.00 Jun. 02, 2004 page 5 of 15