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| Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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CMOS IC help!
This is a 4-bit Magnitude Comparator.
The 7485 (or 74LS85) is pin-for-pin compatible. The only thing is the Vcc power supply will have to be limited to 5 Volts. If this chip is connected to external inputs, they will have to be TTL compatible, also. Digi-Key sells both parts 4063B & 75LS85 (but I didn't check their stock-on-hand). |
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