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Each multivibrator features both a negative, A, and a positive, B, transition triggered input, either of which can be used as an inhibit. Also included is a clear inpt that when taken low resets the one shot. The HD74HC221 can be triggered on the positive transition of teh clear while A is held low and B is held high. This device is a non-retriggerable, and .
both a negative, A, and a positive, B, transition triggered input, either of which can be used as an inhibit. Also included is a clear inpt that when taken low resets the one shot. The HD74HC221 can be triggered on the positive transition of teh clear while A is held low and B is held high. This device is a non-retriggerable, and therefore cannot be retriggered until the output pulse times out. The output pulse equation is simply: tW = 0.7
·(Rext)
·(Cext)
Features
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• High Speed Operation High Output Current: Fanout of 10 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Curren.
74221 - NXP
The 74HC/HCT221 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are.
74221 - Fairchild Semiconductor
The MM74HC221A high speed monostable multivibrators (one shots) utilize advanced silicon-gate CMOS technology. They feat.
| No. | Partie # | Fabricant | Description | Fiche Technique |
|---|---|---|---|---|
| 1 | 7420 |
Fairchild Semiconductor |
Dual 4-Input NAND Gates |
|
| 2 | 7420 |
NTE |
Dual 4-Input Positive NAND Gate |
|
| 3 | 7421 |
Fairchild Semiconductor |
Dual 4-Input Positive AND Gate |
|
| 4 | 7423 |
Texas Instruments |
Dual 4-Input NOR Gate |
|
| 5 | 74240 |
Fairchild Semiconductor |
Octal 3-STATE Buffer/Line Driver/Line Receiver |
|
| 6 | 74240 |
San Mao |
Eight three-state inverting buffer / line driver / line receiver |
|
| 7 | 74244 |
Fairchild Semiconductor |
Octal 3-STATE Buffer/Line Driver/Line Receiver |
|
| 8 | 74244 |
ETC |
Octal 3-STATE Buffer/Line Driver/Line Receiver |
|
| 9 | 74245 |
Fairchild Semiconductor |
3-STATE Octal Bus Transceiver |
|
| 10 | 74247 |
National Semiconductor |
BCD to 7-Segment Decoder/Driver |
|
| 11 | 74248 |
ETC |
BCD to 7-Segment Decoder/Driver |
|
| 12 | 7425 |
NTE |
Dual 4-Input Positive NOR Gate |
|