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74ACT640 数据表(PDF) 1 Page - ON Semiconductor |
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74ACT640 数据表(HTML) 1 Page - ON Semiconductor |
1 / 6 page © Semiconductor Components Industries, LLC, 2006 December, 2006 − Rev. 3 1 Publication Order Number: MC74ACT640/D MC74ACT640 Octal 3−State Inverting Transciever The MC74ACT640 octal bus transceiver is designed for asynchronous two-way communication between data buses. The device transmits data from bus A to bus B when T/R = HIGH, or from bus B to bus A when T/R = LOW. The enable input can be used to disable the device so the buses are effectively isolated. Features • Bidirectional Data Path • A and B Outputs Sink 24 mA/Source −24 mA • TTL Compatible Inputs • Pb−Free Packages are Available* 19 20 18 16 15 14 2 1 3 4567 VCC 13 8 12 9 11 10 OE B0 B1 B2 B3 B4 B5 B6 B7 T/R A0 A1 A2 A3 A4 A5 A6 A7 GND 17 Figure 1. Pinout: 20−Lead Packages Conductors (Top View) PIN ASSIGNMENT PIN FUNCTION A0−A7 Side A Inputs or 3-State Outputs OE Output Enable Input T/R Transmit/Receive Input B0−B7 Side B Inputs or 3-State Outputs TRUTH TABLE OE T/R Applied Inputs Valid Direction I/P →O/P Output H X X X X L H H A to B L L H L A to B H L L H B to A L L L L B to A H H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. See general marking information in the device marking section on page 4 of this data sheet. DEVICE MARKING INFORMATION http://onsemi.com SOIC−20W DW SUFFIX CASE 751D SOEIAJ−20 M SUFFIX CASE 967 1 1 PDIP−20 N SUFFIX CASE 738 1 †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. Device Package Shipping† ORDERING INFORMATION MC74ACT640N PDIP−20 18 Units/Rail MC74ACT640NG PDIP−20 (Pb−Free) 18 Units/Rail MC74ACT640DW SOIC−20 38 Units/Rail MC74ACT640DWG SOIC−20 (Pb−Free) 38 Units/Rail MC74ACT640DWR2 SOIC−20 1000 / Tape & Reel MC74ACT640DWR2G SOIC−20 (Pb−Free) 1000 / Tape & Reel MC74ACT640MEL SOEIAJ−20 2000 / Tape & Reel MC74ACT640MELG SOEIAJ−20 (Pb−Free) 2000 / Tape & Reel |
类似零件编号 - 74ACT640 |
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类似说明 - 74ACT640 |
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