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