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| OCTAL BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS The SN54 / 74LS240, 241 and 244 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. SN54/74LS240 SN54/74LS241 SN54/74LS244 OCTAL BUFFER/ LINE DRIVER WITH 3-STATE OUTPUTS LOW POWER SCHOTTKY * Hysteresis at Inputs to Improve Noise Margins * 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers * Input Clamp Diodes Limit High-Speed Termination Effects LOGIC AND CONNECTION DIAGRAMS DIP (TOP VIEW) SN54 / 74LS240 VCC 2G 20 19 1Y1 18 2A4 1Y2 17 16 2A3 15 1Y3 2A2 1Y4 14 13 12 2A1 11 20 1 J SUFFIX CERAMIC CASE 732-03 20 N SUFFIX PLASTIC CASE 738-03 1 1 1G 2 1A1 3 4 5 6 1A3 7 8 9 10 GND 2Y4 1A2 2Y3 2Y2 1A4 2Y1 SN54 / 74LS241 VCC 2G 20 19 1Y1 18 2A4 1Y2 17 16 2A3 15 1Y3 2A2 1Y4 14 13 12 2A1 11 20 1 DW SUFFIX SOIC CASE 751D-03 ORDERING INFORMATION SN54LSXXXJ Ceramic SN74LSXXXN Plastic SN74LSXXXDW SOIC 1 1G 2 1A1 3 4 5 6 1A3 7 8 9 10 GND 2Y4 1A2 2Y3 2Y2 1A4 2Y1 SN54 / 74LS244 VCC 2G 20 19 1Y1 18 2A4 1Y2 17 16 2A3 15 1Y3 2A2 1Y4 14 13 12 2A1 11 1 1G 2 1A1 3 4 5 6 1A3 7 8 9 10 GND 2Y4 1A2 2Y3 2Y2 1A4 2Y1 FAST AND LS TTL DATA 5-387 SN54/74LS240 * SN54/74LS241 * SN54/74LS244 TRUTH TABLES SN54 / 74LS240 INPUTS OUTPUT 1G, 2G L L H D L H X H L (Z) 1G, 2G L L H D L H X L H (Z) SN54 / 74LS244 INPUTS OUTPUT SN54 / 74LS241 INPUTS 1G L L H D L H X OUTPUT 2G L H (Z) H H L D L H X L H (Z) INPUTS OUTPUT H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = HIGH Impedance GUARANTEED OPERATING RANGES Symbol VCC TA IOH Supply Voltage Operating Ambient Temperature Range Output Current -- High Parameter 54 74 54 74 54, 74 54 74 IOL Output Current -- Low 54 74 Min 4.5 4.75 - 55 0 Typ 5.0 5.0 25 25 Max 5.5 5.25 125 70 - 3.0 - 12 - 15 12 24 Unit V C mA mA mA FAST AND LS TTL DATA 5-388 SN54/74LS240 * SN54/74LS241 * SN54/74LS244 DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Limits Symbol VIH VIL VT+-VT- VIK VOH Parameter Input HIGH Voltage 54 Input LOW Voltage 74 Hysteresis Input Clamp Diode Voltage 54, 74 Output HIGH Voltage 54, 74 54, 74 VOL IOZH IOZL IIH IIL IOS Output LOW Voltage 74 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 LS241/244 LS240 LS241/244 - 40 - 0.2 - 225 27 44 46 50 54 mA VCC = MAX 0.35 0.5 20 - 20 20 V A A A mA mA mA 2.0 0.25 0.4 V V 2.4 0.2 0.4 - 0.65 3.4 - 1.5 0.8 V V V Min 2.0 0.7 V Typ Max Unit 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 IOL = 24 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 Note 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 LS241 / 244 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, RL = 667 CL = 45 pF, RL = 667 Test Conditions FAST AND LS TTL DATA 5-389 SN54/74LS240 * SN54/74LS241 * SN54/74LS244 AC WAVEFORMS VIN 1.3 V tPLH 1.3 V tPHL 1.3 V VCC VOUT 1.3 V RL Figure 1 SW1 TO OUTPUT UNDER TEST VIN 1.3 V tPHL 1.3 V tPLH 1.3 V CL* 5 k VOUT 1.3 V SW2 Figure 2 VE VE 1.3 V tPZL 1.3 V 1.3 V tPLZ SWITCH POSITIONS 1.3 V VOL VOUT 0.5 V Figure 3 Figure 5 VE 1.3 V VE tPZH VOUT 1.3 V 1.3 V tPHZ VOH 1.3 V 0.5 V Figure 4 FAST AND LS TTL DATA 5-390 Case 751D-03 DW Suffix 20-Pin Plastic SO-20 (WIDE) -A20 11 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. 3. CONTROLLING DIMENSION: MILLIMETER. DIMENSION A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. -B1 10 P 0.25 (0.010) M B M 5. 751D 01, AND 02 OBSOLETE, NEW STANDARD 751D 03. 10 PL G R X 45 -TC K M SEATING PLANE M D 20 PL 0.25 (0.010) T B S F J DIM A B C D F G J K M P R MILLIMETERS MIN MAX 12.65 7.40 2.35 0.35 0.50 12.95 7.60 2.65 0.49 0.90 INCHES MIN MAX 0.499 0.292 0.093 0.014 0.020 0.510 0.299 0.104 0.019 0.035 1.27 BSC 0.25 0.10 0 10.05 0.25 0.32 0.25 7 10.55 0.75 0.050 BSC 0.010 0.004 0 0.395 0.010 0.012 0.009 7 0.415 0.029 A S Case 732-03 J Suffix 20-Pin Ceramic Dual In-Line NOTES: 1. LEADS WITHIN 0.25 mm (0.010) DIA., TRUE POSITION AT SEATING PLANE, AT MAXIMUM 20 1 11 2. MATERIAL CONDITION. DIM L TO CENTER OF LEADS WHEN FORMED PARALLEL. 10 3. DIM A AND B INCLUDES MENISCUS. B A F C L N H D SEATING PLANE J M G K DIM A B C D F G H J K L M N MILLIMETERS MIN MAX 23.88 6.60 3.81 0.38 1.40 25.15 7.49 5.08 0.56 1.65 INCHES MIN MAX 0.940 0.260 0.150 0.015 0.055 0.990 0.295 0.200 0.022 0.065 2.54 BSC 0.51 0.20 3.18 1.27 0.30 4.06 0.100 BSC 0.020 0.008 0.125 0.050 0.012 0.160 7.62 BSC 0 0.25 15 1.02 0.300 BSC 0 0.010 15 0.040 Case 738-03 N Suffix 20-Pin Plastic -A20 1 11 10 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. 3. CONTROLLING DIMENSION: INCH. DIMENSION L" TO CENTER OF LEAD WHEN FORMED PARALLEL. B C L 4. DIMENSION B" DOES NOT INCLUDE MOLD FLASH. 5. 738 02 OBSOLETE, NEW STANDARD 738 03. -TSEATING PLANE K E G F D 20 PL 0.25 (0.010) M N M J 20 PL 0.25 (0.010) T A M M T B M DIM A B C D E F G J K L M N MILLIMETERS MIN MAX 25.66 6.10 3.81 0.39 27.17 6.60 4.57 0.55 INCHES MIN MAX 1.010 0.240 0.150 0.015 1.070 0.260 0.180 0.022 1.27 BSC 1.27 1.77 0.050 BSC 0.050 0.070 2.54 BSC 0.21 2.80 0.38 3.55 0.100 BSC 0.008 0.110 0.015 0.140 7.62 BSC 0 0.51 15 1.01 0.300 BSC 0 0.020 15 0.040 FAST AND LS TTL DATA 5-391 Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola 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 consequential or incidental damages. "Typical" parameters can and do vary in different applications. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola 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 Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola 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 Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer. Literature Distribution Centers: USA: Motorola Literature Distribution; P.O. Box 20912; Phoenix, Arizona 85036. tPZH Open Closed EUROPE: Motorola Ltd.; European Literature Centre; 88 Tanners Drive, Blakelands, Milton Keynes, MK14 5BP, England. JAPAN: Nippon Motorola Ltd.; 4-32-1, Nishi-Gotanda, Shinagawa-ku, Tokyo 141, Japan. tPZL Closed Open ASIA PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Center, No. 2 Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong. SYMBOL SW1 SW2 tPLZ Closed Closed Closed Closed tPHZ FAST AND LS TTL DATA 5-392 |
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