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MC74AC245MEL データシート(PDF) 1 Page - ON Semiconductor |
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MC74AC245MEL データシート(HTML) 1 Page - ON Semiconductor |
1 / 12 page © Semiconductor Components Industries, LLC, 2001 May, 2001 – Rev. 5 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. • Noninverting Buffers • Bidirectional Data Path • A and B Outputs Source/Sink 24 mA • ′ACT245 Has TTL Compatible Inputs Figure 1. 19 20 18 17 16 15 14 2 1 3 4 567 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 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 Otpts OE T/R Outputs 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 http://onsemi.com 1 20 PDIP–20 N SUFFIX CASE 738 1 20 1 20 1 20 SO–20 DW SUFFIX CASE 751 TSSOP–20 DT SUFFIX CASE 948E EIAJ–20 M SUFFIX CASE 967 Device Package Shipping ORDERING INFORMATION MC74AC245N PDIP–20 18 Units/Rail MC74ACT245N PDIP–20 18 Units/Rail MC74AC245DW SOIC–20 38 Units/Rail MC74AC245DWR2 SOIC–20 1000 Tape & Reel MC74ACT245DW SOIC–20 38 Units/Rail MC74ACT245DWR2 SOIC–20 1000 Tape & Reel MC74AC245DT TSSOP–20 75 Units/Rail MC74AC245DTR2 TSSOP–20 2500 Tape & Reel MC74ACT245DT TSSOP–20 75 Units/Rail MC74ACT245DTR2 TSSOP–20 2500 Tape & Reel MC74AC245M EIAJ–20 40 Units/Rail MC74AC245MEL EIAJ–20 2000 Tape & Reel MC74ACT245M EIAJ–20 40 Units/Rail MC74ACT245MEL EIAJ–20 2000 Tape & Reel See general marking information in the device marking section on page 6 of this data sheet. DEVICE MARKING INFORMATION |
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