| Electronic component: | Description: | Manuf. | Package | Pins | T°min | T°max | Datasheet |
|---|
| SN54LS490J | Dual decade counter | Motorola | DIP | 16 | -55°C | 125°C | 161 K |
| SN54LS540J | Octal buffer/line driver with 3-state outputs | Motorola | DIP | 20 | -55°C | 125°C | 203 K |
| SN54LS541J | Octal buffer/line driver with 3-state outputs | Motorola | DIP | 20 | -55°C | 125°C | 203 K |
| SN54LS569AJ | 4-bit up/down counter with 3-state outputs | Motorola | DIP | 20 | -55°C | 125°C | 260 K |
| SN54LS623J | Octal bus transceiver with 3-state outputs | Motorola | DIP | 20 | -55°C | 125°C | 70 K |
| SN54LS640J | Octal bus transceiver | Motorola | DIP | 20 | -55°C | 125°C | 118 K |
| SN54LS640J | Octal bus transceiver | Motorola | DIP | 20 | -55°C | 125°C | 118 K |
| SN54LS641J | Octal bus transceiver | Motorola | DIP | 20 | -55°C | 125°C | 118 K |
| SN54LS642J | Octal bus transceiver | Motorola | DIP | 20 | -55°C | 125°C | 118 K |
| SN54LS645J | Octal bus transceiver | Motorola | DIP | 20 | -55°C | 125°C | 118 K |
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