54F/74F545 Octal Bidirectional Transceiver with TRI-STATEÉ Outputs General Description Features The ’F545 is an 8-bit, TRI-STATE, high-speed transceiver. It provides bidirectional drive for bus-oriented microprocessor and digital communications systems. Straight through bidirectional transceivers are featured, with 24 mA (20 mA Mil) bus drive capability on the A ports and 64 mA (48 mA Mil) bus drive capability on the B ports. One input, Transmit/Receive (T/R) determines the direction of logic signals through the bidirectional transceiver. Transmit enables data from A ports to B ports; Receive enables data from B ports to A ports. The Output Enable input disables both A and B ports by placing them in a TRI-STATE condition. Y Commercial Package Number Military 74F545PC 54F545DM (Note 2) 74F545SC (Note 1) Y Y Y Y Y Y Higher drive than 8304 8-bit bidirectional data flow reduces system package count TRI-STATE inputs/outputs for interfacing with bus-oriented systems 24 mA (20 mA Mil) and 64 mA (48 mA Mil) bus drive capability on A and B ports, respectively Transmit/Receive and Output Enable simplify control logic Guaranteed 4000V minimum ESD protection Pin for Pin compatible with Intel 8286 Package Description N20A 20-Lead (0.300× Wide) Molded Dual-In-Line J20A 20-Lead Ceramic Dual-In-Line M20B 20-Lead (0.300× Wide) Molded Small Outline, JEDEC M20D 20-Lead (0.300× Wide) Molded Small Outline, EIAJ 54F545FM (Note 2) W20A 20-Lead Cerpack 54F545LM (Note 2) E20A 20-Lead Ceramic Leadless Chip Carrier, Type C 74F545SJ (Note 1) Note 1: Devices also available in 13× reel. Use suffix e SCX and SJX. Note 2: Military grade device with environmental and burn-in processing. Use suffix e DMQB, FMQB and LMQB. Logic Symbols TL/F/9556 – 3 IEEE/IEC TL/F/9556 – 5 TRI-STATEÉ is a registered trademark of National Semiconductor Corporation. C1995 National Semiconductor Corporation TL/F/9556 RRD-B30M105/Printed in U. S. A. 54F/74F545 Octal Bidirectional Transceiver with TRI-STATE Outputs May 1995 Connection Diagrams Pin Assignment for DIP, SOIC and Flatpak Pin Assignment for LCC TL/F/9556 – 2 TL/F/9556–1 Truth Table Inputs OE T/R L L H L H X Outputs Bus B Data to Bus A Bus A Data to Bus B High Z H e HIGH Voltage Level L e LOW Voltage Level X e Immaterial Z e High Impedance Unit Loading/Fan Out 54F/74F Pin Names OE T/R A 0 – A7 B0 – B7 Description U.L. HIGH/LOW Input IIH/IIL Output IOH/IOL Output Enable Input (Active LOW) 1.0/2.0 20 mA/b1.2 mA Transmit/Receive Input 1.0/2.0 20 mA/b1.2 mA Side A TRI-STATE Inputs or 3.5/1.083 70 mA/b650 mA TRI-STATE Outputs 150/40 (33.3) b3 mA/24 mA (20 mA) Side B TRI-STATE Inputs or 3.5/1.083 70 mA/b650 mA TRI-STATE Outputs 600/106.6 (80) b12 mA/64 mA (48 mA) 2 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. Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Storage Temperature b 65§ C to a 150§ C Ambient Temperature under Bias Junction Temperature under Bias Plastic b 55§ C to a 125§ C Note 2: Either voltage limit or current limit is sufficient to protect inputs. Recommended Operating Conditions b 55§ C to a 175§ C b 55§ C to a 150§ C Free Air Ambient Temperature Military Commercial VCC Pin Potential to Ground Pin b 0.5V to a 7.0V b 0.5V to a 7.0V Input Voltage (Note 2) b 30 mA to a 5.0 mA Input Current (Note 2) Voltage Applied to Output in HIGH State (with VCC e 0V) b 0.5V to VCC Standard Output b 0.5V to a 5.5V TRI-STATE Output Current Applied to Output in LOW State (Max) twice the rated IOL (mA) ESD Last Passing Voltage (Min) b 55§ C to a 125§ C 0§ C to a 70§ C Supply Voltage Military Commercial a 4.5V to a 5.5V a 4.5V to a 5.5V 4000V DC Electrical Characteristics Symbol 54F/74F Parameter Min VIH Input HIGH Voltage VIL Input LOW Voltage VCD Input Clamp Diode Voltage VOH Output HIGH Voltage VOL Typ Units Max 2.0 54F 10% VCC 54F 10% VCC 54F 10% VCC 74F 10% VCC 74F 10% VCC 74F 10% VCC 74F 5% VCC 74F 5% VCC VCC V 0.8 V b 1.2 V 2.5 2.4 2.0 2.5 2.4 2.0 2.7 2.7 Conditions Recognized as a HIGH Signal Recognized as a LOW Signal Min IIN e b18 mA (OE, T/R) V Min IOH IOH IOH IOH IOH IOH IOH IOH e e e e e e e e b 1 mA (An) b 3 mA (An) b 12 mA (Bn) b 1 mA (An) b 3 mA (An) b 15 mA (Bn) b 1 mA (An) b 3 mA (An) IOL IOL IOL IOL e e e e 20 mA (An) 48 mA (Bn) 24 mA (An) 64 mA (Bn) Output LOW Voltage 54F 10% VCC 54F 10% VCC 74F 10% VCC 74F 10% VCC 0.5 0.55 0.5 0.55 V Min IIH Input HIGH Current 54F 74F 20.0 5.0 mA Max VIN e 2.7V (OE, T/R) IBVI Input HIGH Current Breakdown Test 54F 74F 100 7.0 mA Max VIN e 7.0V (OE, T/R) IBVIT Input HIGH Current Breakdown (I/O) 54F 74F 1.0 0.5 mA Max VIN e 5.5V (An, Bn) ICEX Output HIGH Leakage Current 54F 74F 250 50 mA Max VOUT e VCC VID Input Leakage Test 74F V 0.0 IID e 1.9 mA All Other Pins Grounded IOD Output Leakage Circuit Current 74F 3.75 mA 0.0 VIOD e 150 mV All Other Pins Grounded IIL Input LOW Current b 1.2 mA Max VIN e 0.5V (OE, T/R) IIH a IOZH Output Leakage Current 70 mA Max VOUT e 2.7V (An, Bn) IIL a IOZL Output Leakage Current b 650 mA Max VOUT e 0.5V (An, Bn) b 150 b 225 mA Max VOUT e 0V (An) VOUT e 0V (Bn) IOS Output Short-Circuit Current 4.75 b 60 b 100 3 DC Electrical Characteristics (Continued) Symbol 54F/74F Parameter Min Typ Units VCC Conditions Max IZZ Bus Drainage Test 500 mA 0.0V VOUT e 5.25V ICCH Power Supply Current 70 90 mA Max VO e HIGH ICCL Power Supply Current 95 120 mA Max VO e LOW ICCZ Power Supply Current 85 110 mA Max VO e HIGH Z AC Electrical Characteristics Symbol Parameter 74F 54F 74F TA e a 25§ C VCC e a 5.0V CL e 50 pF TA, VCC e Mil CL e 50 pF TA, VCC e Com CL e 50 pF Min Typ Max Min Max Min Max tPLH tPHL Propagation Delay An to Bn or Bn to An 2.5 2.5 4.2 4.6 6.0 6.0 2.0 2.0 7.5 7.5 2.5 2.5 7.0 7.0 tPZH tPZL Output Enable Time 3.0 3.5 5.3 6.0 7.0 8.0 2.5 3.0 9.0 10.0 3.0 3.5 8.0 9.0 tPHZ tPLZ Output Disable Time 3.0 2.0 5.0 5.0 6.5 6.5 2.5 2.0 9.0 10.0 3.0 2.0 7.5 7.5 Units ns ns Logic Diagram TL/F/9556 – 4 Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. 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: 74F 545 S C X Temperature Range Family 74F e Commercial 54F e Military Special Variations QB e Military grade device with environmental and burn-in processing X e Devices shipped in 13× reel Device Type Package Code P e Plastic DIP D e Ceramic DIP F e Flatpak L e Leadless Chip Carrier (LCC) S e Small Outline SOIC JEDEC SJ e Small Outline SOIC EIAJ Temperature Range C e Commercial (0§ C to a 70§ C) M e Military (b55§ C to a 125§ C) 4 Physical Dimensions inches (millimeters) 20-Lead Ceramic Leadless Chip Carrier (L) NS Package Number E20A 20-Lead Ceramic Dual-In-Line Package (D) NS Package Number J20A 5 Physical Dimensions inches (millimeters) (Continued) 20-Lead (0.300× Wide) Molded Small Outline Package, JEDEC (S) NS Package Number M20B 20-Lead (0.300× Wide) Molded Small Outline Package, EIAJ NS Package Number M20D 6 Physical Dimensions inches (millimeters) (Continued) 20-Lead (0.300× Wide) Molded Dual-In-Line Package (P) NS Package Number N20A 7 54F/74F545 Octal Bidirectional Transceiver with TRI-STATE Outputs Physical Dimensions inches (millimeters) (Continued) 20-Lead Ceramic Flatpak (F) NS Package Number W20A LIFE SUPPORT POLICY NATIONAL’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 NATIONAL SEMICONDUCTOR CORPORATION. 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