器件名称:
74FR2245SC
功能描述:
Octal Bidirectional Transceiver with 3-STATE Outputs
文件大小:
41.09KB 共5页
简 介:
74FR2245 Octal Bidirectional Transceiver with 3-STATE Outputs 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-oriented 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 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 s Non-inverting buffers s Bidirectional data path s Guaranteed pin-to-pin skew s 25 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: Order Number 74FR2245SC Package Number M20B Package Description 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” letter to the ordering code. Logic Symbol Connection Diagram Pin Descriptions Pin Names OE T/R A0–A7 B0–B7 Description Output Enable Input (Active-LOW) Transmit/Receive Input Side A Inputs or 3-STATE Outputs Side B Inputs or 3-STATE Outputs Truth Table Inputs OE L L H H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial ……
