| Electronic component: | Description: | Manuf. | Package | Pins | T°min | T°max | Datasheet |
|---|
| DM74LS90CW | Decade and Binary Counter | Fairchild-Semiconductor | - | - | - | - | 61 K |
| DM74LS90M | Decade and Binary Counter | Fairchild-Semiconductor | SOIC | 14 | - | - | 61 K |
| DM74LS90MX | Decade and Binary Counter | Fairchild-Semiconductor | SOIC | 14 | - | - | 61 K |
| DM74LS90N | Decade and Binary Counter | Fairchild-Semiconductor | MDIP | 14 | - | - | 61 K |
| SN74LS290D | Decade counter; 4-bit binary counter | Motorola | SOIC | 16 | 0°C | 70°C | 205 K |
| SN74LS290N | Decade counter; 4-bit binary counter | Motorola | PDIP | 16 | 0°C | 70°C | 205 K |
| SN74LS293D | Decade counter; 4-bit binary counter | Motorola | SOIC | 16 | 0°C | 70°C | 205 K |
| SN74LS293N | Decade counter; 4-bit binary counter | Motorola | PDIP | 16 | 0°C | 70°C | 205 K |
| SN74LS298D | Quad 2-input multiplexer with storage | Motorola | SOIC | 16 | 0°C | 70°C | 187 K |
| SN74LS298N | Quad 2-input multiplexer with storage | Motorola | PDIP | 16 | 0°C | 70°C | 187 K |
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