7 lines
309 B
Plaintext
7 lines
309 B
Plaintext
TTL devices can handle CMOS input. HD6309 -> 74LS612
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CMOS devices may or may not handle TTL input. 74LS612 -> peripherals
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62256 SRAM, 28C256 EEPROM, 16550 UART all handle TTL input.
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82C42 lists it's outputs as TTL compatible, but says nothing for inputs.
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Must ensure all peripherals are rated for TTL input.
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