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MC74F657A Datasheet(PDF) 2 Page - Motorola, Inc |
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MC74F657A Datasheet(HTML) 2 Page - Motorola, Inc |
2 / 5 page 4-248 FAST AND LS TTL DATA MC74F657A, B GUARANTEED OPERATING RANGES Symbol Parameter Min Typ Max Unit VCC Supply Voltage 74 4.5 5.0 5.5 V TA Operating Ambient Temperature Range 74 0 25 70 °C IOH Output Current — High 74 –3.0/–15 mA IOL Output Current — Low 74 24/64 mA FUNCTION TABLE Number of Inputs That are High Inputs Input/Output Outputs OE T/R Even/Odd Parity Error Outputs Mode L H H H Z Transmit L H L L Z Transmit L L H H H Receive 0, 2, 4, 6, 8 L L H L L Receive L L L H L Receive L L L L H Receive Number of Inputs That are High Inputs Input/Output Outputs OE T/R Even/Odd Parity Error Outputs Mode L H H L Z Transmit L H L H Z Transmit L L H H L Receive 1, 3, 5, 7 L L H L H Receive L L L H H Receive L L L L L Receive Don’t Care H X X Z Z Z H = HIGH Voltage Level; L = LOW Voltage Level; X = Don’t Care; Z = HIGH impedance state. |
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