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MC74ACT245NG bảng dữ liệu(PDF) 1 Page - ON Semiconductor |
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1 / 10 page © Semiconductor Components Industries, LLC, 2006 November, 2006 − Rev. 7 1 Publication Order Number: MC74AC245/D MC74AC245, MC74ACT245 Octal Bidirectional Transceiver with 3−State Inputs/Outputs The MC74AC245/74ACT245 contains eight non−inverting bidirectional buffers with 3−state outputs and is intended for bus−oriented applications. Current sinking capability is 24 mA at both the A and B ports. The Transmit/Receive (T/R) input determines the direction of data flow through the bidirectional 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. Features • Noninverting Buffers • Bidirectional Data Path • A and B Outputs Source/Sink 24 mA • ′ACT245 has TTL Compatible Inputs • Pb−Free Packages are Available PIN ASSIGNMENT PIN FUNCTION OE Output Enable Input T/R Transmit/Receive Input A0−A7 Side A 3−State Inputs or 3−State Outputs B0−B7 Side B 3−State Inputs or 3−State Outputs TRUTH TABLES Inputs Outputs OE T/R L L Bus B Data to Bus A L H Bus A Data to Bus B H X High Z State H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Figure 1. 19 20 18 17 16 15 14 2 1 34567 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 http://onsemi.com SOIC−20W DW SUFFIX CASE 751D TSSOP−20 DT SUFFIX CASE 948E SOEIAJ−20 M SUFFIX CASE 967 1 1 1 PDIP−20 N SUFFIX CASE 738 1 See detailed ordering and shipping information in the package dimensions section on page 6 of this data sheet. ORDERING INFORMATION See general marking information in the device marking section on page 7 of this data sheet. DEVICE MARKING INFORMATION |
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