| Electronic component: | Description: | Manuf. | Package | Pins | T°min | T°max | Datasheet |
|---|
| M74HC20RM13TR | DUAL 4-INPUT NAND GATE | SGS-Thomson-Microelectronics | - | - | - | - | 172 K |
| M74HC20TTR | DUAL 4-INPUT NAND GATE | SGS-Thomson-Microelectronics | - | - | - | - | 172 K |
| M74HC21B1R | DUAL 4-INPUT AND GATE | SGS-Thomson-Microelectronics | - | - | - | - | 193 K |
| M74HC21M1R | DUAL 4-INPUT AND GATE | SGS-Thomson-Microelectronics | - | - | - | - | 193 K |
| M74HC21RM13TR | DUAL 4-INPUT AND GATE | SGS-Thomson-Microelectronics | - | - | - | - | 193 K |
| M74HC21TTR | DUAL 4-INPUT AND GATE | SGS-Thomson-Microelectronics | - | - | - | - | 193 K |
| M74HC27B1R | TRIPLE 3-INPUT NOR GATE | SGS-Thomson-Microelectronics | - | - | - | - | 150 K |
| M74HC27M1R | TRIPLE 3-INPUT NOR GATE | SGS-Thomson-Microelectronics | - | - | - | - | 150 K |
| M74HC27RM13TR | TRIPLE 3-INPUT NOR GATE | SGS-Thomson-Microelectronics | - | - | - | - | 150 K |
| M74HC27TTR | TRIPLE 3-INPUT NOR GATE | SGS-Thomson-Microelectronics | - | - | - | - | 150 K |
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