| Electronic component: | Description: | Manuf. | Package | Pins | T°min | T°max | Datasheet |
|---|
| 54F521DM | 8-Bit Identity Comparator | distributor | Cerdip | 20 | - | - | 165 K |
| 54F521DMQB | 8-Bit Identity Comparator | distributor | Cerdip | 20 | - | - | 165 K |
| 54F521LMQB | 8-Bit Identity Comparator | distributor | LCC | 20 | - | - | 165 K |
| BLF521 | UHF power MOS transistor | Philips-Semiconductors | SOT172 | - | - | - | 90 K |
| N74F521D | 8-bit identity comparator | Philips-Semiconductors | SOT163 | - | - | - | 79 K |
| N74F521N | 8-bit identity comparator | Philips-Semiconductors | SOT146 | - | - | - | 79 K |
| N74F524D | 8-bit register comparator (open-collector + 3-State) | Philips-Semiconductors | SOT163 | - | - | - | 131 K |
| N74F524N | 8-bit register comparator (open-collector + 3-State) | Philips-Semiconductors | SOT146 | - | - | - | 131 K |
| SN54F521J | 8-BIT IDENTITY COMPARATORS | Texas-Instruments | J | 20 | -55°C | 125°C | 73 K |
| SNJ54F521FK | 8-BIT IDENTITY COMPARATORS | Texas-Instruments | FK | 20 | -55°C | 125°C | 73 K |
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