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| MC74HC245A Octal 3-State Noninverting Bus Transceiver High-Performance Silicon-Gate CMOS The MC74HC245A is identical in pinout to the LS245. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. The HC245A is a 3-state noninverting transceiver that is used for 2-way asynchronous communication between data buses. The device has an active-low Output Enable pin, which is used to place the I/O ports into high-impedance states. The Direction control determines whether data flows from A to B or from B to A. http://onsemi.com MARKING DIAGRAMS 20 PDIP-20 N SUFFIX CASE 738 1 MC74HC245AN AWLYYWW 1 20 * * * * * * * Output Drive Capability: 15 LSTTL Loads Outputs Directly Interface to CMOS, NMOS, and TTL Operating Voltage Range: 2 to 6 V Low Input Current: 1 A High Noise Immunity Characteristic of CMOS Devices In Compliance with the Requirements Defined by JEDEC Standard No. 7A Chip Complexity: 308 FETs or 77 Equivalent Gates LOGIC DIAGRAM A1 A2 A3 A DATA PORT A4 A5 A6 A7 A8 DIRECTION OUTPUT ENABLE 2 3 4 5 6 7 8 9 1 19 PIN 10 = GND PIN 20 = VCC 18 17 16 15 14 13 12 11 B1 B2 B3 B4 B5 B6 B7 B8 B DATA PORT 20 20 1 SOIC WIDE-20 DW SUFFIX CASE 751D 1 A WL YY WW HC245A AWLYYWW = Assembly Location = Wafer Lot = Year = Work Week PIN ASSIGNMENT DIRECTION A1 A2 A3 A4 A5 A6 A7 A8 GND 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VCC OUTPUT ENABLE B1 B2 B3 B4 B5 B6 B7 B8 FUNCTION TABLE Control Inputs Output Enable L L H X = don't care Direction L H X Operation Data Transmitted from Bus B to Bus A Data Transmitted from Bus A to Bus B Buses Isolated (High-Impedance State) ORDERING INFORMATION Device MC74HC245AN MC74HC245ADW MC74HC245ADWR2 Package PDIP-20 SOIC-WIDE SOIC-WIDE Shipping 1440 / Box 38 / Rail 1000 / Reel (c) Semiconductor Components Industries, LLC, 2000 1 March, 2000 - Rev. 8 Publication Order Number: MC74HC245A/D MC74HC245A IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I I II I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I II I I I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I II I I II I I I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I I I II I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I I II II I I I II I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I II I I I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I I III I I I I I II I I II I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I II I I III I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I I III I I I I I I I I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I II IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIII I I I I IIIIIIIIIIIIIIIIIIIIIII III I II I I IIIIIIIIIIIIIIIIIIIII IIII I I IIIIIIIIIIIIIIIIIIIIIII II I IIII I I I IIIIIIIIIIIIIIIIIIIIIII II I I IIIIIIIIIIIIIIIIIIIIIII II I I IIIIIIIIIIIIIIIIIIIIIII II I I IIIIIIIIIIIIIIIIIIIIIII II I I IIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIII I IIIIIIIIIIIIIIIIIIIIIII II I II I IIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIII II I II I I IIIIIIIIIIIIIIIIIIIIIII I II I I IIIIIIIIIIIIIIIIIIIIIII II I II II I I I IIIIIIIIIIIIIIIIIIIIIII I II I IIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIII II I IIIIIIIIIIIIIIIIIIIIIII III II IIIIIIIIIIIIIIIIIIIIIII II I IIIIIIIIIIIIIIIIIIIIIII II I IIIIIIIIIIIIIIIIIIIIIII II I IIIIIIIIIIIIIIIIIIIIIII II I IIIIIIIIIIIIIIIIIIIIIII II I III IIIIIIIIIIIIIIIIIIIIIII II II I I IIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIII I IIIIIIIIIIIIIIIIIIIIIII II I I IIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIII I I IIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIII I I IIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIII II I IIIIIIIIIIIIIIIIIIIIIII MAXIMUM RATINGS* Symbol VCC Vin Iin VI/O II/O PD Parameter Value Unit V V V DC Supply Voltage (Referenced to GND) DC Input Voltage (Referenced to GND) - 0.5 to + 7.0 - 0.5 to VCC + 0.5 - 0.5 to VCC + 0.5 20 35 75 750 500 DC Output Voltage (Referenced to GND) DC Input Current, per Pin mA mA mA DC Output Current, per Pin ICC DC Supply Current, VCC and GND Pins Power Dissipation in Still Air, Storage Temperature Plastic DIP SOIC Package mW Tstg TL - 65 to + 150 260 _C _C Lead Temperature, 1 mm from Case for 10 Seconds (Plastic DIP or SOIC Package) This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this high-impedance circuit. For proper operation, Vin and Vout should be constrained to the range GND (Vin or Vout) VCC. Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or VCC). Unused outputs must be left open. v v *Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended Operating Conditions. Derating -- Plastic DIP: - 10 mW/_C from 65_ to 125_C SOIC Package: - 7 mW/_C from 65_ to 125_C For high frequency or heavy load considerations, see Chapter 2 of the ON Semiconductor High-Speed CMOS Data Book (DL129/D). RECOMMENDED OPERATING CONDITIONS Symbol VCC TA Parameter Min 2.0 0 Max 6.0 Unit V V DC Supply Voltage (Referenced to GND) Vin, Vout tr, tf DC Input Voltage, Output Voltage (Referenced to GND) Operating Temperature, All Package Types Input Rise and Fall Time (Figure 1) VCC - 55 0 0 0 + 125 1000 500 400 _C ns VCC = 2.0 V VCC = 4.5 V VCC = 6.0 V DC ELECTRICAL CHARACTERISTICS (Voltages Referenced to GND) Guaranteed Limit Symbol VIH Parameter Test Conditions VCC V 2.0 3.0 4.5 6.0 2.0 3.0 4.5 6.0 2.0 4.5 6.0 3.0 4.5 6.0 2.0 4.5 6.0 3.0 4.5 6.0 - 55 to 25_C 1.5 2.1 3.15 4.2 0.5 0.9 1.35 1.8 1.9 4.4 5.9 v 85_C v 125_C 1.5 2.1 3.15 4.2 0.5 0.9 1.35 1.8 1.9 4.4 5.9 1.5 2.1 3.15 4.2 0.5 0.9 1.35 1.8 1.9 4.4 5.9 2.2 3.7 5.2 0.1 0.1 0.1 0.4 0.4 0.4 Unit V Minimum High-Level Input Voltage Vout = VCC - 0.1 V |Iout| 20 A v v v VIL Maximum Low-Level Input Voltage Vout = 0.1 V |Iout| 20 A V VOH Minimum High-Level Output Voltage Vin = VIH |Iout| 20 A Vin = VIH V |Iout| |Iout| |Iout| v 2.4 mA v 6.0 mA v 7.8 mA v 2.4 mA v 6.0 mA v 7.8 mA 2.48 3.98 5.48 0.1 0.1 0.1 2.34 3.84 5.34 0.1 0.1 0.1 VOL Maximum Low-Level Output Voltage Vin = VIL |Iout| 20 A v V Vin = VIL |Iout| |Iout| |Iout| 0.26 0.26 0.26 0.33 0.33 0.33 http://onsemi.com 2 MC74HC245A DC ELECTRICAL CHARACTERISTICS (Voltages Referenced to GND) IIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I IIIII II I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II II I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I I I I I II I I I II I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII III I I I I I II I I I II I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIII I I II I I I II I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I III I I I I I II I I II II I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I I III II IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I I I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I IIIIIIIIIII I I II I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIII I I IIIIIIIIIIIIIIIIIIIIII I II I I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIII I II II I I I II I I I I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I I IIIIIIIIIIIIIIIIIIIIII I II I I I II I I I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I I I I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I III I I I I I II I I I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIIIIIII II I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I II I I I I Guaranteed Limit Symbol Iin Parameter Test Conditions VCC V 6.0 6.0 - 55 to 25_C 0.1 0.5 v 85_C v 125_C 1.0 5.0 1.0 10 Unit A A Maximum Input Leakage Current Maximum Three-State Leakage Current Vin = VCC or GND IOZ Output in High-Impedance State Vin = VIL or VIH Vout = VCC or GND Vin = VCC or GND Iout = 0 A ICC Maximum Quiescent Supply Current (per Package) 6.0 4.0 40 160 A NOTE: Information on typical parametric values and high frequency or heavy load considerations can be found in Chapter 2 of the ON Semiconductor High-Speed CMOS Data Book (DL129/D). AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns) Guaranteed Limit Symbol tPLH, tPHL Parameter VCC V 2.0 3.0 4.5 6.0 2.0 3.0 4.5 6.0 2.0 3.0 4.5 6.0 2.0 3.0 4.5 6.0 -- -- - 55 to 25_C 75 55 15 13 v 85_C v 125_C 95 70 19 16 110 80 22 19 Unit ns Maximum Propagation Delay, A to B, B to A (Figures 1 and 3) tPLZ, tPHZ Maximum Propagation Delay, Direction or Output Enable to A or B (Figures 2 and 4) 110 90 22 19 110 90 22 19 60 23 12 10 10 15 140 110 28 24 140 110 28 24 75 27 15 13 10 15 165 130 33 28 165 130 33 28 90 32 18 15 10 15 ns tPZL, tPZH Maximum Propagation Delay, Output Enable to A or B (Figures 2 and 4) ns tTLH, tTHL Maximum Output Transition Time, Any Output (Figures 1 and 3) ns Cin Maximum Input Capacitance (Pin 1 or Pin 19) Maximum Three-State I/O Capacitance (I/O in High-Impedance State) pF pF Cout NOTE: For propagation delays with loads other than 50 pF, and information on typical parametric values, see Chapter 2 of the ON Semiconductor High-Speed CMOS Data Book (DL129/D). Typical @ 25C, VCC = 5.0 V 40 CPD Power Dissipation Capacitance (Per Transceiver Channel)* pF * Used to determine the no-load dynamic power consumption: P D = C PD V CC 2 f + I CC V CC . For load considerations, see Chapter 2 of the ON Semiconductor High-Speed CMOS Data Book (DL129/D). http://onsemi.com 3 MC74HC245A SWITCHING WAVEFORMS VCC DIRECTION 50% GND VCC tr INPUT A OR B tPLH OUTPUT B OR A tTLH 90% 50% 10% tTHL 90% 50% 10% tPHL tf VCC GND A OR B OUTPUT ENABLE 50% GND tPZL 50% tPZH A OR B 50% tPHZ 10% 90% tPLZ HIGH IMPEDANCE VOL VOH HIGH IMPEDANCE Figure 1. Figure 2. TEST CIRCUITS TEST POINT OUTPUT DEVICE UNDER TEST DEVICE UNDER TEST TEST POINT OUTPUT 1 k CONNECT TO VCC WHEN TESTING tPLZ AND tPZL. CONNECT TO GND WHEN TESTING tPHZ AND tPZH. CL* CL* *Includes all probe and jig capacitance *Includes all probe and jig capacitance Figure 3. Figure 4. http://onsemi.com 4 MC74HC245A EXPANDED LOGIC DIAGRAM A1 2 18 3 17 4 16 5 15 6 14 7 13 8 12 9 11 B8 B7 B6 B5 B4 B DATA PORT B3 B2 B1 A2 A3 A4 A DATA PORT A5 A6 A7 A8 DIRECTION 1 OUTPUT ENABLE 19 http://onsemi.com 5 MC74HC245A PACKAGE DIMENSIONS PDIP-20 N SUFFIX PLASTIC DIP PACKAGE CASE 738-03 ISSUE E 11 -A- 20 B 1 10 C L NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. INCHES MIN MAX 1.010 1.070 0.240 0.260 0.150 0.180 0.015 0.022 0.050 BSC 0.050 0.070 0.100 BSC 0.008 0.015 0.110 0.140 0.300 BSC 0_ 15 _ 0.020 0.040 MILLIMETERS MIN MAX 25.66 27.17 6.10 6.60 3.81 4.57 0.39 0.55 1.27 BSC 1.27 1.77 2.54 BSC 0.21 0.38 2.80 3.55 7.62 BSC 0_ 15_ 0.51 1.01 -T- SEATING PLANE K M E G F D 20 PL N J 0.25 (0.010) M 20 PL 0.25 (0.010) TA M M TB M DIM A B C D E F G J K L M N SO-20 DW SUFFIX CASE 751D-05 ISSUE F D A 11 X 45 _ q NOTES: 1. DIMENSIONS ARE IN MILLIMETERS. 2. INTERPRET DIMENSIONS AND TOLERANCES PER ASME Y14.5M, 1994. 3. DIMENSIONS D AND E DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE. 5. DIMENSION B DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE PROTRUSION SHALL BE 0.13 TOTAL IN EXCESS OF B DIMENSION AT MAXIMUM MATERIAL CONDITION. MILLIMETERS MIN MAX 2.35 2.65 0.10 0.25 0.35 0.49 0.23 0.32 12.65 12.95 7.40 7.60 1.27 BSC 10.05 10.55 0.25 0.75 0.50 0.90 0_ 7_ H M B M 20 10X 0.25 E 1 10 h 20X B 0.25 M B TA S B S A SEATING PLANE DIM A A1 B C D E e H h L L 18X e A1 q T C http://onsemi.com 6 MC74HC245A Notes http://onsemi.com 7 MC74HC245A ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. 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