Revised July 1999 74F243 Quad Bus Transceiver with 3-STATE Outputs General Description Features The 74F243 is a quad bus transmitter/receiver designed for 4-line asynchronous 2-way data communications between data busses. ■ 2-Way asynchronous data bus communication ■ Input clamp diodes limit high-speed termination effects Ordering Code: Order Code Package Number 74F243SC Package Description M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Logic Symbol Connection Diagram IEEE/IEC Truth Table Inputs H = HIGH Voltage Level L = LOW Voltage Level Inputs/Outputs E1 E2 An Bn L L Input B=A N/A L H N/A H L Z Z H H A=B Input Z = High Impedance N/A = Not Allowed Unit Loading/Fan Out Pin U.L. Description Names Input IIH/IIL HIGH/LOW Output IOH/IOL E1 Enable Input (Active LOW) 1.0/1.67 20 µA/−1 mA E2 Enable Input (Active HIGH) 1.0/1.67 20 µA/−1 mA 3.5/2.67 70 µA/−1.6 mA An, Bn Inputs 600/106.6 −12 mA/64 mA (80) (48 mA) Outputs © 1999 Fairchild Semiconductor Corporation DS009502 www.fairchildsemi.com 74F243 Quad Bus Transceiver with 3-STATE Outputs April 1988 74F243 Absolute Maximum Ratings(Note 1) Recommended Operating Conditions Storage Temperature −65°C to +150°C Ambient Temperature under Bias −55°C to +125°C Free Air Ambient Temperature Junction Temperature under Bias −55°C to +150°C Supply Voltage 0°C to +70°C +4.5V to +5.5V −0.5V to +7.0V VCC Pin Potential to Ground Pin Input Voltage (Note 2) −0.5V to +7.0V Input Current (Note 2) −30 mA to +5.0 mA Voltage Applied to Output in HIGH State (with VCC = 0V) Standard Output −0.5V to VCC 3-STATE Output −0.5V to +5.5V 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. Current Applied to Output Note 2: Either voltage limit or current limit is sufficient to protect inputs. twice the rated IOL (mA) in LOW State (Max) ESD Last Passing Voltage (Min) 4000V DC Electrical Characteristics Symbol Parameter Min Typ Max VCC V Conditions Input HIGH Voltage VIL Input LOW Voltage 0.8 V VCD Input Clamp Diode Voltage −1.2 V Min IIN = −18 mA VOH Output HIGH 10% VCC 2.4 Voltage 10% VCC 2.0 V Min IOH = −15 mA (An, Bn) 5% VCC 2.7 Output LOW 10% VCC 0.55 V Min IOL = 64 mA (An, Bn) 5.0 µA Max VIN = 2.7V 7.0 µA Max VIN = 7.0V (E1, E2) 0.5 mA Max VIN = 5.5V (An, Bn) 50 µA Max VOUT = VCC V 0.0 3.75 µA 0.0 −1.0 mA Max VIN = 0.5V (E1, E2) 70 µA Max VOUT = 2.7V (An, B n) VOL 2.0 Units VIH IOH = −3 mA (An, Bn) Input HIGH Current IBVI Input HIGH Current IBVIT Input HIGH Current ICEX Output HIGH Breakdown Test Breakdown (I/O) Leakage Current VID Input Leakage Test IOD 4.75 Output Leakage Circuit Current IIL Input LOW Current IIH + IOZH Output Leakage Current IIL + IOZL Output Leakage Current IOS Output Short-Circuit Current ICCH Power Supply Current ICCL Power Supply Current ICCZ Power Supply Current www.fairchildsemi.com Recognized as a LOW Signal IOH = −3 mA (An, Bn) Voltage IIH Recognized as a HIGH Signal IID = 1.9 µA All Other Pins Grounded VIOD = 150 mV All Other Pins Grounded −1.6 mA Max VOUT = 0.5V (An, B n) −225 mA Max VOUT = 0V (An, Bn) 64 80 mA Max VO = HIGH 64 90 mA Max VO = LOW 71 90 mA Max VO = HIGH Z −100 2 74F243 AC Electrical Characteristics Symbol Parameter TA = +25°C TA = −55°C to +125°C TA = 0°C to +70°C VCC = +5.0V VCC = 5.0V VCC = 5.0V CL = 50 pF CL = 50 pF CL = 50 pF Min Typ Max Min Max Min Max tPLH Propagation Delay 2.5 4.0 5.2 2.0 6.5 2.0 6.2 tPHL An to Bn, Bn to An 2.5 4.0 5.2 2.0 8.5 2.0 6.5 tPZH Output Enable Time 2.0 4.3 5.7 2.0 8.0 2.0 6.7 tPZL E1 to Bn, E2 to An 2.0 5.8 7.5 2.0 10.5 2.0 8.5 tPHZ Output Disable Time 2.0 4.5 6.0 1.5 7.5 1.5 7.0 tPLZ E1 to Bn, E2 to An 2.0 4.5 6.0 2.0 8.5 2.0 7.0 3 Units ns ns www.fairchildsemi.com 74F243 Quad Bus Transceiver with 3-STATE Outputs Physical Dimensions inches (millimeters) unless otherwise noted 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow Package Number M14A 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. 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