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74FR2245 Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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74FR2245 Datasheet(HTML) 1 Page - Fairchild Semiconductor |
1 / 5 page © 1999 Fairchild Semiconductor Corporation DS012114 www.fairchildsemi.com April 1995 Revised August 1999 74FR2245 Octal Bidirectional Transceiver with 3-STATE Outputs General Description The 74FR2245 contains eight non-inverting bidirectional buffers with 3-STATE outputs and is intended for bus-ori- ented applications. Current sinking capability is 64 mA on the A Port. The Transmit/Receive (T/R) input determines the direction of data flow through the bidirectional trans- ceiver. 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, dis- ables both A and B Ports by placing them in a High Z con- dition. Features s Non-inverting buffers s Bidirectional data path s Guaranteed pin-to-pin skew s 25 Ω series resistors in B outputs eliminate the need for external resistors s 3-STATE outputs drive bus lines or buffer memory address resistors Ordering Code: Devices also available in Tape and Reel. Specify by appending the suffix letter “X” letter to the ordering code. Logic Symbol Pin Descriptions Connection Diagram Truth Table H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Order Number Package Number Package Description 74FR2245SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide Pin Names Description OE Output Enable Input (Active-LOW) T/R Transmit/Receive Input A0–A7 Side A Inputs or 3-STATE Outputs B0–B7 Side B Inputs or 3-STATE Outputs Inputs Output OE T/R L L Bus B Data to Bus A L H Bus A Data to Bus B H X High Z State |
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Descripción similar - 74FR2245 |
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