PDF 74FR2245 Data sheet ( Hoja de datos )

Número de pieza	74FR2245
Descripción	Octal Bidirectional Transceiver with 3-STATE Outputs
Fabricantes	Fairchild
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No Preview Available ! 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 25Ω 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 Package Number Package Description 74FR2245SC M20B 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 T/R LL LH HX H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Output Bus B Data to Bus A Bus A Data to Bus B High Z State © 1999 Fairchild Semiconductor Corporation DS012114 www.fairchildsemi.com 1 page Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide Package Number M20B Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be rea- sonably expected to result in a significant injury to the user. 2. A critical component in any component of a life support device or system whose failure to perform can be rea- sonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com 5 www.fairchildsemi.com 5 Page

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