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PDF HD74LV2G123A Data sheet ( Hoja de datos )
| Número de pieza | HD74LV2G123A | |
| Descripción | Retriggerable Monostable Multivibrator | |
| Fabricantes | Renesas Technology | |
| Logotipo |  |
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HD74LV2G123A
Retriggerable Monostable Multivibrator
REJ03D0098–0300Z
(Previous ADE-205-352B (Z))
Rev.3.00
Sep.30.2003
Description
The HD74LV2G123A 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. The output pulse equation is simply : tWQ = Cext • Rext.
Low voltage and high-speed operation is suitable for the battery powered products (e.g., notebook
computers), and the low power consumption extends the battery life.
Features
• The basic gate function is lined up as Renesas uni logic series.
• Supplied on emboss taping for high-speed automatic mounting.
• Electrical characteristics equivalent to the HD74LV123A
Supply voltage range : 1.65 to 5.5 V
Operating temperature range : –40 to +85°C
• All inputs VIH (Max.) = 5.5 V (@VCC = 0 V to 5.5 V)
All outputs VO (Max.) = 5.5 V (@VCC = 0 V)
• Output current ±6 mA (@VCC = 3.0 V to 3.6 V), ±12 mA (@VCC = 4.5 V to 5.5 V)
• All the logical input has hysteresis voltage for the slow transition.
• Ordering Information
Part Name
Package Type
Package Code Package
Abbreviation
Taping Abbreviation
(Quantity)
HD74LV2G123AUSE SSOP-8 pin
TTP-8DBV
US
E (3,000 pcs/reel)
Rev.3.00, Sep.30.2003, page 1 of 18
1 page  
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HD74LV2G123A
Logic Diagram
A
B
CLR
Rext/
Cext Cext
Q
CLR
Q
Rev.3.00, Sep.30.2003, page 5 of 18
5 Page 
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HD74LV2G123A
Test Circuit
VCC
Input
VCC
Cext Rext
–+
Cext = 28 pF or 100 pF or 0.01 µF or 0.1 µF
Rext = 1 kΩ or 2 kΩ or 5 kΩ or 10 kΩ
Cext Rext/ VCC
Cext
A
BQ
CLR
GND
Output
CL = 15 pF or 50 pF
Note : CL includes the probe and jig capacitance.
Rev.3.00, Sep.30.2003, page 11 of 18
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet HD74LV2G123A.PDF ] | |
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