| Electronic component: | Description: | Manuf. | Package | Pins | T°min | T°max | Datasheet |
|---|
| 54ACT521MDA | 8-Bit Identity Comparator | distributor | - | - | - | - | 195 K |
| 74AC521MTC | 8-Bit Identity Comparator | Fairchild-Semiconductor | TSSOP | 20 | - | - | 80 K |
| 74AC521MTCX | 8-Bit Identity Comparator | Fairchild-Semiconductor | TSSOP | 20 | - | - | 80 K |
| 74ACT521MTC | 8-Bit Identity Comparator | Fairchild-Semiconductor | TSSOP | 20 | - | - | 80 K |
| 74ACT521MTCX | 8-Bit Identity Comparator | Fairchild-Semiconductor | TSSOP | 20 | - | - | 80 K |
| ACS521MS | Radiation Hardened 8-Bit Magnitude Comparator | Intersil-Corporation | - | - | - | - | 104 K |
| TF521M | Thyristor | Sanken-Electric-Co- | - | - | - | - | 48 K |
| TSA5521M/C3 | 1.3 GHz universal bus-controlled TV synthesizer; 3-wire | Philips-Semiconductors | SOT369 | - | - | - | 285 K |
| TSA5521M/C3/R1 | 1.3 GHz universal bus-controlled TV synthesizer; 3-wire | Philips-Semiconductors | SOT369 | - | - | - | 285 K |
| TSA5521M/C4 | 1.3 GHz universal bus-controlled TV synthesizer; 3-wire | Philips-Semiconductors | SOT369 | - | - | - | 285 K |
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