SN74LS242

QUAD BUS TRANSCEIVER The SN54/ 74LS242 and SN54 / 74LS243 are Quad Bus Transmitters / Receivers designed for 4-line asynchronous 2-way data communications between data buses. SN54/74LS242 SN54/74LS243 • Hysteresis at Inputs to Improve Noise Immunity • 2-Way Asynchronous Data Bus Communication • Input Clamp Diodes Limit High-Speed Termination Effects LOGIC AND CONNECTION DIAGRAMS DIP (TOP VIEW) SN54 / 74LS242 VCC 14 GBA 13 NC 12 1B 11 2B 10 3B 9 4B 8 QUAD BUS TRANSCEIVER LOW POWER SCHOTTKY J SUFFIX CERAMIC CASE 632-08 14 1 1 GBA 2 NC 3 1A 4 2A 5 3A 6 4A 7 GND NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package. 14 1 N SUFFIX PLASTIC CASE 646-06 SN54 / 74LS243 VCC 14 GBA 13 NC 12 1B 11 2B 10 3B 9 4B 8 14 1 D SUFFIX SOIC CASE 751A-02 ORDERING INFORMATION 1 GBA 2 NC 3 1A 4 2A 5 3A 6 4A 7 GND SN54LSXXXJ Ceramic SN74LSXXXN Plastic SN74LSXXXDW SOIC TRUTH TABLES SN54 / 74LS242 INPUTS OUTPUT GAB L L H D L H X H L (Z) GAB L H H D X L H (Z) H L INPUTS OUTPUT GAB L L H D L H X L H (Z) INPUTS OUTPUT GAB L H H D X L H (Z) H L SN54/74LS243 INPUTS OUTPUT H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = HIGH Impedance FAST AND LS TTL DATA 5-393 SN54/74LS242 • SN54/74LS243 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 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 Output LOW Voltage 74 Output Off Current HIGH Output Off Current LOW D, E1, E2 IIH Input HIGH Current E1, E2 D Input IIL IOS Input LOW Current Output Short Circuit Current (Note 1) Power Supply Current Total, Output HIGH ICC Total, Output LOW LS242 Total at HIGH Z LS243 54 Note 1: Not more than one output should be shorted at a time, nor for more than 1 second. Min 2.0 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 0.7 V 0.8 0.2 0.4 – 0.65 2.4 2.0 0.25 0.35 0.4 0.5 40 – 200 20 0.1 0.1 – 0.2 – 40 – 225 38 50 50 mA 3.4 – 1.5 V V V V V V µA µA µA mA mA mA mA 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 = 5.5 V VCC = MAX, VIN = 0.4 V VCC = MAX VCC = MAX FAST AND LS TTL DATA 5-394 SN54/74LS242 • SN54/74LS243 AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V) Limits LS242 Symbol tPLH tPHL tPZH tPZL tPLZ tPHZ Parameter Propagation Delay, Data to Output 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 15 20 15 10 Max 14 18 23 30 25 18 Min LS243 Typ 12 12 15 20 15 10 Max 18 18 23 30 25 18 Unit ns ns ns ns ns CL = 5.0 pF, RL = 667 Ω CL = 45 pF, RL = 667 Ω Test Conditions AC WAVEFORMS VIN 1.3 V tPLH 1.3 V tPHL 1.3 V VCC VOUT 1.3 V RL Figure 1 TO OUTPUT UNDER TEST SW1 VIN 1.3 V tPHL 1.3 V tPLH 1.3 V CL* 5 kΩ VOUT 1.3 V SW2 Figure 2 VE VE 1.3 V tPZL 1.3 V 1.3 V tPLZ SWITCH POSITIONS SYMBOL tPZH tPZL tPLZ tPHZ SW1 Open Closed Closed Closed SW2 Closed Open Closed Closed VOUT ≈ 1.3 V VOL 0.5 V Figure 3 VE 1.3 V VE tPZH VOUT 1.3 V 1.3 V tPHZ ≥VOH 0.5 V Figure 5 ≈ 1.3 V Figure 4 FAST AND LS TTL DATA 5-395 Case 751A-02 D Suffix 14-Pin Plastic SO-14 -A14 8 NOTES: 1. DIMENSIONS A" AND B" ARE DATUMS AND T" IS A DATUM SURFACE. 2. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 3. 4. CONTROLLING DIMENSION: MILLIMETER. DIMENSION A AND B DO NOT INCLUDE MOLD PROTRUSION. 5. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 6. 751A 01 IS OBSOLETE, NEW STANDARD 751A 02. -B1 7 P 7 PL 0.25 (0.010) M B M G C SEATING PLANE R X 45° D 14 PL 0.25 (0.010) M K T B S M F J A S DIM A B C D F G J K M P R MILLIMETERS MIN MAX 8.55 3.80 1.35 0.35 0.40 8.75 4.00 1.75 0.49 1.25 INCHES MIN MAX 0.337 0.150 0.054 0.014 0.016 0.344 0.157 0.068 0.019 0.049 1.27 BSC 0.19 0.10 0 0.25 0.25 7 0.050 BSC 0.008 0.004 0 0.009 0.009 7 ° ° ° ° 5.80 0.25 6.20 0.50 0.229 0.010 0.244 0.019 Case 632-08 J Suffix 14-Pin Ceramic Dual In-Line -A14 8 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. -B1 7 3. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 4. DIM F MAY NARROW TO 0.76 (0.030) WHERE THE LEAD ENTERS THE CERAMIC BODY. 5. 632 01 THRU 07 OBSOLETE, NEW STANDARD C L 632 08. -TSEATING PLANE K F D 14 PL 0.25 (0.010) M G T A S N J 14 PL M 0.25 (0.010) M T B S DIM A B C D F G J K L M N MILLIMETERS MIN MAX 19.05 6.23 3.94 0.39 1.40 19.94 7.11 5.08 0.50 1.65 INCHES MIN MAX 0.750 0.245 0.155 0.015 0.055 0.785 0.280 0.200 0.020 0.065 2.54 BSC 0.21 3.18 0.38 4.31 0.100 BSC 0.008 0.125 0.015 0.170 7.62 BSC 0 ° 15 ° 0.300 BSC 0 ° 15 ° 0.51 1.01 0.020 0.040 Case 646-06 N Suffix 14-Pin Plastic NOTES: 1. LEADS WITHIN 0.13 mm (0.005) RADIUS OF TRUE POSITION AT SEATING PLANE AT MAXIMUM MATERIAL CONDITION. 14 8 B 1 7 2. DIMENSION L" TO CENTER OF LEADS WHEN FORMED PARALLEL. 3. DIMENSION B" DOES NOT INCLUDE MOLD FLASH. 4. 5. ROUNDED CORNERS OPTIONAL. 646 05 OBSOLETE, NEW STANDARD 646 06. A F C N H G D SEATING PLANE NOTE 4 L J K M DIM A B C D F G H J K L M N MILLIMETERS MIN MAX 18.16 6.10 3.69 0.38 1.02 19.56 6.60 4.69 0.53 1.78 INCHES MIN MAX 0.715 0.240 0.145 0.015 0.040 0.770 0.260 0.185 0.021 0.070 2.54 BSC 1.32 0.20 2.92 2.41 0.38 3.43 0.100 BSC 0.052 0.008 0.115 0.095 0.015 0.135 7.62 BSC 0 ° 10 ° 0.300 BSC 0 ° 10 ° 0.39 1.01 0.015 0.039 FAST AND LS TTL DATA 5-396 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. 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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. ◊ FAST AND LS TTL DATA 5-397