SN74LS139 Dual 1-of-4 Decoder/ Demultiplexer The LSTTL/MSI SN74LS139 is a high speed Dual 1-of-4 Decoder/Demultiplexer. The device has two independent decoders, each accepting two inputs and providing four mutually exclusive active LOW Outputs. Each decoder has an active LOW Enable input which can be used as a data input for a 4-output demultiplexer. Each half of the LS139 can be used as a function generator providing all four minterms of two variables. The LS139 is fabricated with the Schottky barrier diode process for high speed and is completely compatible with all ON Semiconductor TTL families. • • • • • • http://onsemi.com LOW POWER SCHOTTKY Schottky Process for High Speed Multifunction Capability Two Completely Independent 1-of-4 Decoders Active Low Mutually Exclusive Outputs Input Clamp Diodes Limit High Speed Termination Effects ESD > 3500 Volts 16 1 GUARANTEED OPERATING RANGES Symbol VCC Parameter Supply Voltage Min Typ Max 4.75 5.0 5.25 V 0 25 70 °C PLASTIC N SUFFIX CASE 648 Unit TA Operating Ambient Temperature Range IOH Output Current – High – 0.4 mA IOL Output Current – Low 8.0 mA 16 1 SOIC D SUFFIX CASE 751B ORDERING INFORMATION Semiconductor Components Industries, LLC, 1999 December, 1999 – Rev. 6 1 Device Package Shipping SN74LS139N 16 Pin DIP 2000 Units/Box SN74LS139D 16 Pin 2500/Tape & Reel Publication Order Number: SN74LS139/D SN74LS139 CONNECTION DIAGRAM DIP (TOP VIEW) VCC Eb A0b A1b O0b O1b O2b O3b 16 15 14 13 12 11 10 9 NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package. 1 2 3 4 5 6 7 8 Ea A0a A1a O0a O1a O2a O3a GND LOADING (Note a) PIN NAMES A0, A1 E O0 – O3 Address Inputs Enable (Active LOW) Input Active LOW Outputs HIGH LOW 0.5 U.L. 0.5 U.L. 10 U.L. 0.25 U.L. 0.25 U.L. 5 U.L. NOTES: a) 1 TTL Unit Load (U.L.) = 40 mA HIGH/1.6 mA LOW. LOGIC SYMBOL 1 E 2 3 15 14 13 A0 A1 E A0 A1 DECODER a DECODER b O0 O1 O2 O3 O0 O1 O2 O3 4 5 6 7 12 11 10 9 VCC = PIN 16 GND = PIN 8 http://onsemi.com 2 SN74LS139 LOGIC DIAGRAM Ea A0a A1a 1 2 Eb 3 A0b A1b 15 14 13 VCC = PIN 16 GND = PIN 8 = PIN NUMBERS 4 O0a 5 O1a 6 7 O2a O3a 12 11 O0b O1b 10 O2b 9 O3b FUNCTIONAL DESCRIPTION The LS139 is a high speed dual 1-of-4 decoder/ demultiplexer fabricated with the Schottky barrier diode process. The device has two independent decoders, each of which accept two binary weighted inputs (A0, A1) and provide four mutually exclusive active LOW outputs (O0 – O3). Each decoder has an active LOW Enable (E). When E is HIGH all outputs are forced HIGH. The enable can be used as the data input for a 4-output demultiplexer application. Each half of the LS139 generates all four minterms of two variables. These four minterms are useful in some applications, replacing multiple gate functions as shown in Fig. a, and thereby reducing the number of packages required in a logic network. TRUTH TABLE INPUTS OUTPUTS E A0 A1 O0 O1 O2 O3 H L L L L X L H L H X L L H H H L H H H H H L H H H H H L H H H H H L H = HIGH Voltage Level L = LOW Voltage Level X = Don’t Care E A0 A1 O0 E A0 A1 O0 E A0 A1 O1 E A0 A1 O1 E A0 A1 O2 E A0 A1 O2 E A0 A1 O3 E A0 A1 O3 Figure a http://onsemi.com 3 SN74LS139 DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Limits Symbol Parameter VIH Input HIGH Voltage VIL Input LOW Voltage VIK Input Clamp Diode Voltage VOH Output HIGH Voltage VOL O Output LOW Voltage Min Typ Max Unit 2.0 0.8 – 0.65 2.7 IIH Input HIGH Current IIL Input LOW Current IOS Short Circuit Current (Note 1) ICC Power Supply Current – 1.5 3.5 Test Conditions V Guaranteed Input HIGH Voltage for All Inputs V Guaranteed Input LOW Voltage for All Inputs V VCC = MIN, IIN = – 18 mA V VCC = MIN, IOH = MAX, VIN = VIH or VIL per Truth Table 0.25 0.4 V IOL = 4.0 mA 0.35 0.5 V IOL = 8.0 mA – 20 VCC = VCC MIN, VIN = VIL or VIH per Truth Table 20 µA VCC = MAX, VIN = 2.7 V 0.1 mA VCC = MAX, VIN = 7.0 V – 0.4 mA VCC = MAX, VIN = 0.4 V –100 mA VCC = MAX 11 mA VCC = MAX Note 1: Not more than one output should be shorted at a time, nor for more than 1 second. AC CHARACTERISTICS (TA = 25°C) Symbol Levels of Delay Parameter Limits Min Typ Max Unit tPLH tPHL Propagation Delay Address to Output 2 2 13 22 20 33 ns tPLH tPHL Propagation Delay Address to Output 3 3 18 25 29 38 ns tPLH tPHL Propagation Delay Enable to Output 2 2 16 21 24 32 ns Test Conditions VCC = 5.0 V CL = 15 pF AC WAVEFORMS VIN VOUT 1.3 V VIN 1.3 V tPHL tPLH 1.3 V 1.3 V 1.3 V tPHL VOUT Figure 1. 1.3 V tPLH 1.3 V Figure 2. http://onsemi.com 4 1.3 V SN74LS139 PACKAGE DIMENSIONS N SUFFIX PLASTIC PACKAGE CASE 648–08 ISSUE R NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. 5. ROUNDED CORNERS OPTIONAL. –A– 16 9 1 8 B F C L S –T– SEATING PLANE K H G D M J 16 PL 0.25 (0.010) M T A M http://onsemi.com 5 DIM A B C D F G H J K L M S INCHES MIN MAX 0.740 0.770 0.250 0.270 0.145 0.175 0.015 0.021 0.040 0.70 0.100 BSC 0.050 BSC 0.008 0.015 0.110 0.130 0.295 0.305 0_ 10 _ 0.020 0.040 MILLIMETERS MIN MAX 18.80 19.55 6.35 6.85 3.69 4.44 0.39 0.53 1.02 1.77 2.54 BSC 1.27 BSC 0.21 0.38 2.80 3.30 7.50 7.74 0_ 10 _ 0.51 1.01 SN74LS139 PACKAGE DIMENSIONS D SUFFIX PLASTIC SOIC PACKAGE CASE 751B–05 ISSUE J –A– 16 9 1 8 –B– P NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. 8 PL 0.25 (0.010) M B S G R K F X 45 _ C –T– SEATING PLANE J M D 16 PL 0.25 (0.010) M T B S A S http://onsemi.com 6 DIM A B C D F G J K M P R MILLIMETERS MIN MAX 9.80 10.00 3.80 4.00 1.35 1.75 0.35 0.49 0.40 1.25 1.27 BSC 0.19 0.25 0.10 0.25 0_ 7_ 5.80 6.20 0.25 0.50 INCHES MIN MAX 0.386 0.393 0.150 0.157 0.054 0.068 0.014 0.019 0.016 0.049 0.050 BSC 0.008 0.009 0.004 0.009 0_ 7_ 0.229 0.244 0.010 0.019 SN74LS139 Notes http://onsemi.com 7 SN74LS139 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. 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