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MC74F1245 Datasheet(PDF) 1 Page - Motorola, Inc |
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MC74F1245 Datasheet(HTML) 1 Page - Motorola, Inc |
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4-264 FAST AND LS TTL DATA OCTAL BIDIRECTIONAL TRANSCEIVER WITH 3-STATE INPUTS/OUTPUTS The MC74F1245 contains eight noninverting bidirectional buffers with 3-state outputs and is intended for bus-oriented applications. Current sinking capability is 24 mA at the A ports and 64 mA at the B ports. The Transmit/ Receive (T/R) input determines the direction of data flow through the bidirec- tional transceiver. Transmit (active HIGH) enables data from A ports to B ports; Receive (active LOW) enables data from B ports to A ports. The Output Enable input, when HIGH, disables both A and B ports by placing them in a high-Z condition. • Noninverting Buffers • Bidirectional Data Path • B Outputs Sink 64 mA • High Impedance Inputs for Reduced Loading • Same Function and Pinout as the F245 • ESD Protection > 4000 Volts PIN ASSIGNMENT LOGIC SYMBOL 18 17 16 15 14 13 1 2 3 4 5 6 7 20 19 8 VCC T/R OE B0 B1 B2 B4 B3 B5 A0 A1 A2 A3 A4 A5 A6 9 10 A7 GND 12 11 B6 B7 T/R A0 A1 A2 A3 A4 A5 A6 A7 B0 B1 B2 B3 B4 B5 B6 B7 OE 2 3 4 5 6 7 8 9 19 1 18 17 16 15 14 13 12 11 GUARANTEED OPERATING RANGES Symbol Parameter Min Typ Max Unit VCC DC Supply Voltage 74 4.5 5.0 5.5 V TA Operating Ambient Temperature Range 74 0 25 70 °C IOH Output Current High An Outputs 74 — — –3.0 mA IOL Output Current Low An Outputs 74 — — 24 mA IOH Output Current High Bn Outputs 74 — — –15 mA IOL Output Current Low Bn Outputs 74 — — 64 mA MC74F1245 OCTAL BIDIRECTIONAL TRANSCEIVER WITH 3-STATE INPUTS/OUTPUTS FAST ™ SCHOTTKY TTL ORDERING INFORMATION MC74FXXXXJ Ceramic MC74FXXXXN Plastic MC74FXXXXDW SOIC 20 1 J SUFFIX CERAMIC CASE 732-03 20 1 N SUFFIX PLASTIC CASE 738-03 20 1 DW SUFFIX SOIC CASE 751D-03 |
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