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| IN74ACT139 DUAL 1-OF-4 DECODER/DEMULTIPLEXER High-Speed Silicon-Gate CMOS The IN74ACT139 is identical in pinout to the LS/ALS139, HC/HCT139. The IN74ACT139 may be used as a level converter for interfacing TTL or NMOS outputs to High Speed CMOS inputs. This device consists of two independent 1-of-4 decoders, each of which decodes a two-bit Address to one-of-four active-low outputs. Active-low Selects are provided to facilitate the demultiplexing and cascading functions. The demultiplexing function is accomplished by using the Address inputs to select the desired device output, and utilizing the Select as a data input. * TTL/NMOS Compatible Input Levels Outputs Directly Interface to CMOS, NMOS, and TTL Operating Voltage Range: 4.5 to 5.5 V Low Input Current: 1.0 A; 0.1 A @ 25C Outputs Source/Sink 24 mA * * * * ORDERING INFORMATION IN74ACT139N Plastic IN74ACT139D SOIC TA = -40 to 85 C for all packages PIN ASSIGNMENT LOGIC DIAGRAM PIN 16 =VCC PIN 8 = GND FUNCTION TABLE Inputs Outputs Select A1 A0 Y Y1 Y2 0 H X X H H H L L L L H H L L H H L H L H L H H L L H H H H H X = don't care Y3 H H H H L 1 IN74ACT139 MAXIMUM RATINGS* Symbol Parameter Value Unit VCC DC Supply Voltage (Referenced to GND) -0.5 to +7.0 V VIN DC Input Voltage (Referenced to GND) -0.5 to VCC +0.5 V VOUT DC Output Voltage (Referenced to GND) -0.5 to VCC +0.5 V IIN DC Input Current, per Pin mA 20 IOUT DC Output Sink/Source Current, per Pin mA 50 ICC DC Supply Current, VCC and GND Pins mA 50 PD Power Dissipation in Still Air, Plastic DIP+ 750 mW SOIC Package+ 500 Tstg Storage Temperature -65 to +150 C 260 TL Lead Temperature, 1 mm from Case for 10 C Seconds (Plastic DIP or SOIC Package) * Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended Operating Conditions. +Derating - Plastic DIP: - 10 mW/C from 65 to 125C SOIC Package: : - 7 mW/C from 65 to 125C RECOMMENDED OPERATING CONDITIONS Symbol Parameter VCC DC Supply Voltage (Referenced to GND) VIN, VOUT DC Input Voltage, Output Voltage (Referenced to GND) TJ Junction Temperature (PDIP) TA Operating Temperature, All Package Types IOH Output Current - High IOL Output Current - Low t r, tf Input Rise and Fall Time * VCC =4.5 V VCC =5.5 V (except Schmitt Inputs) * VIN from 0.8 V to 2.0 V Min 4.5 0 Max 5.5 VCC 140 +85 -24 24 10 8.0 Unit V V C C mA mA ns/V -40 0 0 This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this high-impedance circuit. For proper operation, VIN and VOUT should be constrained to the range GND(VIN or VOUT)VCC. Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or VCC). Unused outputs must be left open. 2 IN74ACT139 DC ELECTRICAL CHARACTERISTICS(Voltages Referenced to GND) VC Guaranteed Limits C Symbol VIH Parameter Test Conditions V 25 C Minimum High- VOUT=0.1 V or VCC-0.1 V 4.5 2.0 Level Input 5.5 2.0 Voltage VIL Maximum Low - VOUT=0.1 V or VCC-0.1 V 4.5 0.8 Level Input 5.5 0.8 Voltage VOH Minimum High- IOUT -50 A 4.5 4.4 Level Output 5.5 5.4 Voltage * VIN=VIH or VIL 3.86 IOH=-24 mA 4.5 4.86 5.5 IOH=-24 mA VOL Maximum Low- IOUT 50 A 4.5 0.1 Level Output 5.5 0.1 Voltage * VIN= VIH or VIL 0.36 IOL=24 mA 4.5 0.36 5.5 IOL=24 mA IIN Maximum Input VIN=VCC or GND 5.5 0.1 Leakage Current 5.5 Additional Max. VIN=VCC - 2.1 V ICCT ICC/Input VOLD=1.65 V Max IOLD +Minimum 5.5 Dynamic Output Current VOHD=3.85 V Min IOHD +Minimum 5.5 Dynamic Output Current VIN=VCC or GND ICC Maximum 5.5 8.0 Quiescent Supply Current (per Package) * All outputs loaded; thresholds on input associated with output under test. +Maximum test duration 2.0 ms, one output loaded at a time. -40C to 85C 2.0 2.0 0.8 0.8 4.4 5.4 3.76 4.76 0.1 0.1 0.44 0.44 1.0 1.5 75 -75 80 Unit V V V V A mA mA mA A 3 IN74ACT139 AC ELECTRICAL CHARACTERISTICS(VCC=5.0 V 10%, CL=50pF,Input tr=tf=3.0 ns) Guaranteed Limits Unit Symbol Parameter 25 C -40C to 85C Min Max Min Max tPLH Propagation Delay , Input A to Output Y 1.5 8.5 1.5 9.5 ns (Figure 2) tPHL Propagation Delay , Input A to Output Y 1.5 9.5 1.5 10.5 ns (Figure 2) tPLH Propagation Delay, Select to Output Y 2.5 10.0 2.0 11.0 ns (Figure 1) tPHL Propagation Delay, Select to Output Y 2.0 9.5 1.5 10.5 ns (Figure 1) CIN Maximum Input Capacitance 4.5 4.5 pF Typical @25C,VCC=5.0 V 40 CPD Power Dissipation Capacitance pF Figure 1. Switching Waveform Figure 2. Switching Waveform 4 IN74ACT139 EXPANDED LOGIC DIAGRAM 5 |
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