SN74LS245 Octal Bus Transceiver The SN74LS245 is an Octal Bus Transmitter/Receiver designed for 8-line asynchronous 2-way data communication between data buses. Direction Input (DR) controls transmission of Data from bus A to bus B or bus B to bus A depending upon its logic level. The Enable input (E) can be used to isolate the buses. • • • • http://onsemi.com Hysteresis Inputs to Improve Noise Immunity 2-Way Asynchronous Data Bus Communication Input Diodes Limit High-Speed Termination Effects ESD > 3500 Volts LOW POWER SCHOTTKY LOGIC AND CONNECTION DIAGRAMS DIP (TOP VIEW) VCC E B1 B2 B3 B4 B5 B6 B7 B8 20 19 18 17 16 15 14 13 12 11 20 1 1 2 3 4 5 6 7 8 9 10 DIR A1 A2 A3 A4 A5 A6 A7 A8 GND PLASTIC N SUFFIX CASE 738 TRUTH TABLE INPUTS OUTPUT E DIR L L H L H X 20 Bus B Data to Bus A Bus A Data to Bus B Isolation 1 SOIC DW SUFFIX CASE 751D H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial GUARANTEED OPERATING RANGES Symbol VCC Parameter Supply Voltage TA Operating Ambient Temperature Range IOH Output Current – High IOL Output Current – Low Semiconductor Components Industries, LLC, 1999 December, 1999 – Rev. 6 Min Typ Max Unit 4.75 5.0 5.25 V 0 25 70 °C ORDERING INFORMATION Device SN74LS245N – 3.0 mA – 15 mA 24 mA 1 SN74LS245DW Package Shipping 16 Pin DIP 1440 Units/Box 16 Pin 2500/Tape & Reel Publication Order Number: SN74LS245/D SN74LS245 DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Limits Symbol Parameter VIH Input HIGH Voltage VIL Input LOW Voltage VT+–VT– Hysteresis VIK Input Clamp Diode Voltage Min 0.8 VOL O Output LOW Voltage 0.4 – 0.65 2.4 Output HIGH Voltage Max 2.0 0.2 VOH O Typ – 1.5 3.4 2.0 Unit Test Conditions V Guaranteed Input HIGH Voltage for All Inputs V Guaranteed Input LOW Voltage for All Inputs V VCC = MIN V VCC = MIN, IIN = – 18 mA V VCC = MIN, IOH = – 3.0 mA V VCC = MIN, IOH = MAX 0.25 0.4 V IOL = 12 mA 0.35 0.5 V IOL = 24 mA VCC = VCC MIN, VIN = VIL or VIH per Truth Table IOZH Output Off Current HIGH 20 µA VCC = MAX, VOUT = 2.7 V IOZL Output Off Current LOW – 200 µA VCC = MAX, VOUT = 0.4 V A or B, DR or E 20 µA VCC = MAX, VIN = 2.7 V DR or E 0.1 mA VCC = MAX, VIN = 7.0 V A or B 0.1 mA VCC = MAX, VIN = 5.5 V – 0.2 mA VCC = MAX, VIN = 0.4 V – 225 mA VCC = MAX mA A VCC = MAX IIH I Input t HIGH C Currentt IIL Input LOW Current IOS Output Short Circuit Current (Note 1) ICC – 40 Power Supply Current Total, Output HIGH 70 Total, Output LOW 90 Total at HIGH Z 95 Note 1: Not more than one output should be shorted at a time, nor for more than 1 second. AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V, TRISE / TFALL ≤ 6.0 ns) Limits Symbol Parameter Min Typ Max Unit tPLH tPHL Propagation Delay, Data to Output 8.0 8.0 12 12 ns tPZH Output Enable Time to HIGH Level 25 40 ns tPZL Output Enable Time to LOW Level 27 40 ns tPLZ Output Disable Time from LOW Level 15 25 ns tPHZ Output Disable Time from HIGH Level 15 25 ns http://onsemi.com 2 Test Conditions CL = 45 pF, F, RL = 667 Ω CL = 5.0 pF, RL = 667 Ω SN74LS245 PACKAGE DIMENSIONS N SUFFIX PLASTIC PACKAGE CASE 738–03 ISSUE E –A– 20 11 1 10 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. B L C –T– DIM A B C D E F G J K L M N K SEATING PLANE M N E G F J D 20 PL 0.25 (0.010) 20 PL 0.25 (0.010) T A M M T B M M 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 D SUFFIX PLASTIC SOIC PACKAGE CASE 751D–05 ISSUE F q A 20 X 45 _ h 1 10 20X B B 0.25 M T A S B S A L H M E 0.25 10X 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. 11 B M D 18X e A1 SEATING PLANE DIM A A1 B C D E e H h L q C T http://onsemi.com 3 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_ SN74LS245 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. PUBLICATION ORDERING INFORMATION North America Literature Fulfillment: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303–675–2175 or 800–344–3860 Toll Free USA/Canada Fax: 303–675–2176 or 800–344–3867 Toll Free USA/Canada Email: [email protected] ASIA/PACIFIC: LDC for ON Semiconductor – Asia Support Phone: 303–675–2121 (Tue–Fri 9:00am to 1:00pm, Hong Kong Time) Toll Free from Hong Kong 800–4422–3781 Email: ONlit–[email protected] N. American Technical Support: 800–282–9855 Toll Free USA/Canada EUROPE: LDC for ON Semiconductor – European Support German Phone: (+1) 303–308–7140 (M–F 2:30pm to 5:00pm Munich Time) Email: ONlit–[email protected] French Phone: (+1) 303–308–7141 (M–F 2:30pm to 5:00pm Toulouse Time) Email: ONlit–[email protected] English Phone: (+1) 303–308–7142 (M–F 1:30pm to 5:00pm UK Time) Email: [email protected] JAPAN: ON Semiconductor, Japan Customer Focus Center 4–32–1 Nishi–Gotanda, Shinagawa–ku, Tokyo, Japan 141–8549 Phone: 81–3–5487–8345 Email: [email protected] Fax Response Line: 303–675–2167 800–344–3810 Toll Free USA/Canada ON Semiconductor Website: http://onsemi.com For additional information, please contact your local Sales Representative. http://onsemi.com 4 SN74LS245/D