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M74HC221 |
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| Part Number | M74HC221 |
| Manufacturer | STMicroelectronics (https://www.st.com/) |
| Description | The M54/74HC221/221A are high speed CMOS MONOSTABLE multivibrators fabricated with silicon gate C2MOS technology. It achieves the high speed operation similar to equivalent LSTTL while maintaining the... |
| Features |
INPUT (negative edge) and B INPUT (positive edge). Triggering on the B input occurs at a particular voltage threshold and is not related to the rise and fall time of the applied pulse. The device may also be triggered by using the CLR input (positive-edge) because of the Schmitt-trigger input ; after triggering the output maintains the MONOSTABLEstate for the time period determined by the external resistor Rx and capacitor Cx.Taking CLR low breaks this MONOSTABLE STATE. If the next trigger pulse occurs during the MONOSTABLE period it makes the MONOSTABLE period longer. Limit for values of Cx a... |
| Document |
 M74HC221 Data Sheet
PDF 288.34KB |
| No. | Parte # | Fabricante | Descripción | Hoja de Datos |
|---|---|---|---|---|
| 1 | M74HC20 |
ST Microelectronics |
DUAL 4-INPUT NAND GATE |
|
| 2 | M74HC21 |
ST Microelectronics |
DUAL 4-INPUT AND GATE |
|
| 3 | M74HC237 |
ST Microelectronics |
3 TO 8 LINE DECODER LATCH |
|
| 4 | M74HC238 |
ST Microelectronics |
3 TO 8 LINE DECODER |
|
| 5 | M74HC240 |
ST Microelectronics |
OCTAL BUS BUFFER |
|
| 6 | M74HC240HV |
ST Microelectronics |
OCTAL BUS BUFFER |
|
Desde 2024. D4U Semiconductor.
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