74F2245 Octal Bidirectional Transceiver with TRI-STATE Outputs

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1 November Octal Bidirectional Transceiver with TRI-STATE Outputs General Description The F2245 contains eight non-inverting bidirectional buffers with TRI-STATE outputs and is intended for bus-oriented applications Current sinking capability is 24 ma at the A ports and 12 ma at the 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 The 25X series resistors in the outputs reduce ringing and eliminate the need for external resistors Logic Symbols Commercial Package Number Features Non-inverting buffers Bidirectional data path A outputs sink 24 ma B outputs sink 12 ma 25X series resistors in B outputs eliminate the need for external resistors Guaranteed 2000V minimum ESD protection Package Description 2245SC (Note 1) M20B 20-Lead (0 300 Wide) Molded Small Outline JEDEC Note 1 Devices also available in 13 reel Use suffix e SCX TL F IEEE IEC 2245 Octal Bidirectional Transceiver with TRI-STATE Outputs TL F TRI-STATE is a registered trademark of National Semiconductor Corporation C1996 National Semiconductor Corporation TL F RRD-B30M126 Printed in U S A http www national com

2 Connection Diagram Pin Assignment for DIP SOIC and SSOP TL F Unit Loading Fan Out Pin Names Description U L Input I IH I IL HIGH LOW Output I OH I OL OE Output Enable Input (Active LOW) ma b1 2 ma T R Transmit Receive Input ma b1 2 ma A 0 A 7 Side A Inputs or ma b0 65 ma TRI-STATE Outputs (38 3) b3 ma 24 ma B 0 B 7 Side B Inputs or ma b0 65 ma TRI-STATE Outputs b15 ma 12 ma Truth Table OE Inputs T R Output L L Bus B Data to Bus A L H Bus A Data to Bus B H X High Z State H e HIGH Voltage Level L e LOW Voltage Level X e Immaterial http www national com 2

3 Absolute Maximum Ratings (Note 1) Storage Temperature Ambient Temperature under Bias Junction Temperature under Bias Plastic V CC Pin Potential to Ground Pin Input Voltage (Note 2) Input Current (Note 2) Voltage Applied to Output in HIGH State (with V CC e 0V) Standard Output TRI-STATE Output DC Electrical Characteristics Symbol Parameter b65 Ctoa150 C b55 Ctoa125 C b55 Ctoa150 C b0 5V to a7 0V b0 5V to a7 0V b30 ma to a5 0 ma b0 5V to V CC b0 5V to a5 5V Min Typ Max Current Applied to Output in LOW State (Max) twice the rated I OL (ma) ESD Last Passing Voltage (Min) 4000V Note 1 Absolute maximum ratings are values beyond which the device may be damaged or have its useful life impaired Functional operation under these conditions is not implied Note 2 Either voltage limit or current limit is sufficient to protect inputs Recommended Operating Conditions Free Air Ambient Temperature Commercial Supply Voltage Commercial 0 Ctoa70 C a4 5V to a5 5V Units V CC Conditions V IH Input HIGH Voltage 2 0 V Recognized as a HIGH Signal V IL Input LOW Voltage 0 8 V Recognized as a LOW Signal V CD Input Clamp Diode Voltage b1 2 V Min I IN eb18 ma V OH Output HIGH 10% V CC 2 4 I OH eb3ma(a n ) Voltage 10% V CC 2 0 V Min I OH eb15 ma (B n ) 5% V CC 2 7 I OH eb3ma(a n ) V OL Output LOW 10% V CC 0 5 I OL e 24 ma (A n ) Voltage 10% V CC 0 5 V Min I OL e 1mA(B n ) 10% V CC 0 75 I OL e 12 ma (B n ) I IH Input HIGH Current 5 0 ma Max V IN e 2 7V I BVI I BVIT I CEX V ID Input HIGH Current Breakdown Test Input HIGH Current Breakdown (I O) Output HIGH Leakage Current Input Leakage Test 7 0 ma Max V IN e 7 0V (OE T R) 0 5 ma Max V IN e 5 5V(A n B n ) 50 ma Max V OUT e V CC (A n B n ) 4 75 V 0 0 I ID e 1 9 ma All Other Pins Grounded I OD Output Leakage V 3 75 ma 0 0 IOD e 150 mv Circuit Current All Other Pins Grounded I IL Input LOW Current b1 2 ma Max V IN e 0 5V (T R OE) I IH a I OZH Output Leakage Current 70 ma Max V OUT e 2 7V (A n B n ) I IL a I OZL Output Leakage Current b650 ma Max V OUT e 0 5V (A n B n ) 3 http www national com

4 DC Electrical Characteristics (Continued) Symbol Parameter Units V CC Conditions Min Typ Max I OS Output Short-Circuit Current b60 b150 V ma Max OUT e 0V (A n ) b100 b225 V OUT e 0V (B n ) I ZZ Bus Drainage Test 500 ma 0 0V V OUT e 5 25V(A n B n ) I CCH Power Supply Current ma Max V O e HIGH I CCL Power Supply Current ma Max V O e LOW I CCZ Power Supply Current ma Max V O e HIGH Z AC Electrical Characteristics Symbol Parameter T A ea25 C T A V CC e Com V CC ea5 0V C L e 50 pf C L e 50 pf Min Typ Max Min Max t PLH Propagation Delay t PHL A n to B n or B n to A n t PZH Output Enable Time t PZL t PHZ Output Disable Time t PLZ Units ns ns Ordering Information The device number is used to form part of a simplified purchasing code where the package type and temperature range are defined as follows TL F http www national com 4

5 5 http www national com

6 2245 Octal Bidirectional Transceiver with TRI-STATE Outputs Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead (0 300 Wide) Molded Small Outline Package JEDEC (S) NS Package Number M20B LIFE SUPPORT POLIC NATIONAL S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 Life support devices or systems are devices or 2 A critical component is any component of a life systems which (a) are intended for surgical implant support device or system whose failure to perform can into the body or (b) support or sustain life and whose be reasonably expected to cause the failure of the life failure to perform when properly used in accordance support device or system or to affect its safety or with instructions for use provided in the labeling can effectiveness be reasonably expected to result in a significant injury to the user National Semiconductor National Semiconductor National Semiconductor National Semiconductor Corporation Europe Southeast Asia Japan Ltd Americas Fax a49 (0) Fax (852) Tel Tel 1(800) europe support nsc com sea support nsc com Fax Fax 1(800) Deutsch Tel a49 (0) support nsc com English Tel a49 (0) Fran ais Tel a49 (0) http www national com Italiano Tel a49 (0) National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications

74FR Bit Bidirectional Transceiver with 3-STATE Outputs

74FR Bit Bidirectional Transceiver with 3-STATE Outputs 74FR9245 9-Bit Bidirectional Transceiver with 3-STATE Outputs General Description The FR9245 contains nine non-inverting bidirectional buffers with 3-STATE outputs and is intended for bus-oriented applications.