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| SN74LS240, SN74LS244 Octal Buffer/Line Driver with 3-State Outputs The SN74LS240 and SN74LS244 are Octal Buffers and Line Drivers designed to be employed as memory address drivers, clock drivers and bus-oriented transmitters/receivers which provide improved PC board density. http://onsemi.com * Hysteresis at Inputs to Improve Noise Margins * 3-State Outputs Drive Bus Lines or Buffer Memory Address * Input Clamp Diodes Limit High-Speed Termination Effects GUARANTEED OPERATING RANGES Symbol VCC TA IOH Parameter Supply Voltage Operating Ambient Temperature Range Output Current - High Min 4.75 0 Typ 5.0 25 Max 5.25 70 -3.0 -15 IOL Output Current - Low 24 Unit V C mA mA mA 20 1 Registers LOW POWER SCHOTTKY MARKING DIAGRAMS SN74LS24xN AWLYYWW 1 PDIP-20 N SUFFIX CASE 738 20 1 1 LS24x AWLYYWW SOIC-20 DW SUFFIX CASE 751D x A WL YY WW = 0 or 4 = Assembly Location = Wafer Lot = Year = Work Week ORDERING INFORMATION Device SN74LS240N SN74LS240DW SN74LS244N SN74LS244DW Package PDIP-20 SOIC-20 PDIP-20 SOIC-20 Shipping 1440 Units/Box 2500/Tape & Reel 1440 Units/Box 2500/Tape & Reel (c) Semiconductor Components Industries, LLC, 2000 1 August, 2000 - Rev. 7 Publication Order Number: SN74LS240/D SN74LS240, SN74LS244 LOGIC AND CONNECTION DIAGRAMS DIP (TOP VIEW) SN74LS240 VCC 20 2G 19 1Y1 18 2A4 1Y2 2A3 1Y3 2A2 1Y4 2A1 17 16 15 14 13 12 11 1 1G 2 1A1 3 4 5 2Y4 1A2 2Y3 6 8 9 10 7 1A3 2Y2 1A4 2Y1 GND SN74LS244 VCC 20 2G 19 1Y1 18 2A4 1Y2 2A3 1Y3 2A2 1Y4 2A1 17 16 15 14 13 12 11 1 1G 2 1A1 3 4 5 2Y4 1A2 2Y3 6 8 9 10 7 1A3 2Y2 1A4 2Y1 GND TRUTH TABLES SN74LS240 INPUTS OUTPUT 1G, 2G L L H D L H X H L (Z) H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = HIGH Impedance SN74LS244 INPUTS OUTPUT 1G, 2G L L H D L H X L H (Z) http://onsemi.com 2 SN74LS240, SN74LS244 DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Limits Symbol VIH VIL VT+-VT- VIK VOH Parameter Input HIGH Voltage Input LOW Voltage Hysteresis Input Clamp Diode Voltage 2.4 Output HIGH Voltage 2.0 0.25 VOL IOZH IOZL IIH IIL IOS Output LOW Voltage 0.35 Output Off Current HIGH Output Off Current LOW Input HIGH Current 0.1 Input LOW Current Output Short Circuit Current (Note 1.) Power Supply Current Total, Output HIGH Total, Output LOW ICC Total at HIGH Z LS240 LS244 LS240 LS244 -40 -0.2 -225 27 44 46 50 54 mA VCC = MAX 0.5 20 -20 20 V A A A mA mA mA IOL = 24 mA 0.4 V V 0.2 0.4 -0.65 3.4 -1.5 Min 2.0 0.8 Typ Max Unit V V V V V Test Conditions Guaranteed Input HIGH Voltage for All Inputs Guaranteed Input LOW Voltage for All Inputs VCC = MIN VCC = MIN, IIN = -18 mA VCC = MIN, IOH = -3.0 mA VCC = MIN, IOH = MAX IOL = 12 mA VCC = VCC MIN, VIN = VIL or VIH per Truth Table VCC = MAX, VOUT = 2.7 V VCC = MAX, VOUT = 0.4 V VCC = MAX, VIN = 2.7 V VCC = MAX, VIN = 7.0 V VCC = MAX, VIN = 0.4 V VCC = MAX 1. Not more than one output should be shorted at a time, nor for more than 1 second. AC CHARACTERISTICS (TA = 25C, VCC = 5.0 V) Limits Symbol tPLH tPHL tPLH tPHL tPZH tPZL tPLZ tPHZ Parameter Propagation Delay, Data to Output LS240 Propagation Delay, Data to Output LS244 Output Enable Time to HIGH Level Output Enable Time to LOW Level Output Disable Time from LOW Level Output Disable Time from HIGH Level Min Typ 9.0 12 12 12 15 20 15 10 Max 14 18 18 18 23 30 25 18 Unit ns ns ns ns ns ns CL = 5.0 pF, F, RL = 667 CL = 45 pF, RL = 667 Test Conditions http://onsemi.com 3 SN74LS240, SN74LS244 AC WAVEFORMS VIN 1.3 V tPLH 1.3 V tPHL 1.3 V VCC RL SW1 TO OUTPUT UNDER TEST VOUT 1.3 V Figure 1. VIN 1.3 V tPHL 1.3 V tPLH 1.3 V CL* 5 k SW2 VOUT 1.3 V Figure 2. VE VE VOUT 1.3 V tPZL 1.3 V 1.3 V tPLZ 1.3 V VOL SWITCH POSITIONS SYMBOL tPZH tPZL tPLZ tPHZ SW1 Open Closed Closed Closed SW2 Closed Open Closed Closed 0.5 V Figure 3. Figure 5. VE VE VOUT 1.3 V tPZH 1.3 V 1.3 V tPHZ VOH 1.3 V 0.5 V Figure 4. http://onsemi.com 4 SN74LS240, SN74LS244 PACKAGE DIMENSIONS N SUFFIX PLASTIC PACKAGE CASE 738-03 ISSUE E -A- 20 1 11 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. DIM A B C D E F G J K L M N 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 B 10 C L -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 http://onsemi.com 5 SN74LS240, SN74LS244 D SUFFIX PLASTIC SOIC PACKAGE 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. DIM A A1 B C D E e H h L q 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 20X B 0.25 M B TA S B S A SEATING PLANE h 18X e A1 T C http://onsemi.com 6 L SN74LS240, SN74LS244 Notes http://onsemi.com 7 SN74LS240, SN74LS244 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: ONlit@hibbertco.com Fax Response Line: 303-675-2167 or 800-344-3810 Toll Free USA/Canada N. American Technical Support: 800-282-9855 Toll Free USA/Canada EUROPE: LDC for ON Semiconductor - European Support German Phone: (+1) 303-308-7140 (Mon-Fri 2:30pm to 7:00pm CET) Email: ONlit-german@hibbertco.com French Phone: (+1) 303-308-7141 (Mon-Fri 2:00pm to 7:00pm CET) Email: ONlit-french@hibbertco.com English Phone: (+1) 303-308-7142 (Mon-Fri 12:00pm to 5:00pm GMT) Email: ONlit@hibbertco.com EUROPEAN TOLL-FREE ACCESS*: 00-800-4422-3781 *Available from Germany, France, Italy, UK, Ireland CENTRAL/SOUTH AMERICA: Spanish Phone: 303-308-7143 (Mon-Fri 8:00am to 5:00pm MST) Email: ONlit-spanish@hibbertco.com 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 & Singapore: 001-800-4422-3781 Email: ONlit-asia@hibbertco.com JAPAN: ON Semiconductor, Japan Customer Focus Center 4-32-1 Nishi-Gotanda, Shinagawa-ku, Tokyo, Japan 141-0031 Phone: 81-3-5740-2745 Email: r14525@onsemi.com ON Semiconductor Website: http://onsemi.com For additional information, please contact your local Sales Representative. http://onsemi.com 8 SN74LS240/D |
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