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PDF 74HC4538 Data sheet ( Hoja de datos )
| Número de pieza | 74HC4538 | |
| Descripción | Dual retriggerable precision monostable multivibrator | |
| Fabricantes | Philips | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de 74HC4538 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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INTEGRATED CIRCUITS
DATA SHEET
For a complete data sheet, please also download:
• The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications
• The IC06 74HC/HCT/HCU/HCMOS Logic Package Information
• The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines
74HC/HCT4538
Dual retriggerable precision
monostable multivibrator
Product specification
File under Integrated Circuits, IC06
September 1993
1 page  
Philips Semiconductors
Dual retriggerable precision monostable
multivibrator
nA1
nA0
power - on reset
VCC
VCC
nRC TC
nC TC
GND
nR D
Vref1
enable
V ref2
enable
Product specification
74HC/HCT4538
MBA338
nQ
nQ
Fig.7 Logic diagram (Vref1 and Vref2 are internal reference voltages).
September 1993
5
5 Page 
Philips Semiconductors
Product specification
Dual retriggerable precision monostable
multivibrator
74HC/HCT4538
Fig.11 Power-down protection circuit.
Power-down considerations
A large capacitor (CX) may cause problems when
powering-down the monostable due to the energy stored
in this capacitor. When a system containing this device is
powered-down or a rapid decrease of VCC to zero occurs,
the monostable may sustain damage, due to the capacitor
discharging through the input protection diodes. To avoid
this possibility, use a damping diode (DX) preferably a
germanium or Schottky type diode able to withstand large
current surges and connect as shown in Fig.11.
Fig.12 Typical pulse width accuracy versus external capacitance; VCC = 4.5 V; Tamb = 25 °C.
Fig.13 Typical pulse width accuracy versus external resistance; VCC = 4.5 V; Tamb = 25 °C.
September 1993
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet 74HC4538.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| 74HC4538 | Dual retriggerable precision monostable multivibrator | Philips |
| 74HC4538 | Dual retriggerable precision monostable multivibrator |  ON Semiconductor |
| 74HC4538 | Dual retriggerable precision monostable multivibrator |  Toshiba |
| 74HC4538 | Dual retriggerable precision monostable multivibrator |  Fairchild |
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