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U74HC138 Dataheets PDF



Part Number U74HC138
Manufacturers UTC
Logo UTC
Description 3-TO-8 LINE DECODERS / DEMULTIPLEXERS
Datasheet U74HC138 DatasheetU74HC138 Datasheet (PDF)

UNISONIC TECHNOLOGIES CO., LTD U74HC138 3-TO-8 LINE DECODERS / DEMULTIPLEXERS  DESCRIPTION The U74HC138 decodes a three-bit Address to 1-of-8 active-low outputs. This device features three Chip Select inputs, two active-low and one active-high, to facilitate the demultiplexing, cascading, and chip-selecting functions. The demultiplexing function is accomplished by using the address inputs to select the desired device output. One of the Chip Selects is used as a data input while the other Chip .

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UNISONIC TECHNOLOGIES CO., LTD U74HC138 3-TO-8 LINE DECODERS / DEMULTIPLEXERS  DESCRIPTION The U74HC138 decodes a three-bit Address to 1-of-8 active-low outputs. This device features three Chip Select inputs, two active-low and one active-high, to facilitate the demultiplexing, cascading, and chip-selecting functions. The demultiplexing function is accomplished by using the address inputs to select the desired device output. One of the Chip Selects is used as a data input while the other Chip Selects are held in their active states.  FEATURES * Operate from 2.0V ~ 6.0V * Low Input Current: 100nA Max * Low Quiescent Current: 8μA Max * Typ tPD=15ns * Output Drive:4mA @ 5V  ORDERING INFORMATION Ordering Number Lead Free Halogen Free U74HC138L-D16-T U74HC138G-D16-T U74HC138L-S16-R U74HC138G-S16-R U74HC138L-R16-R U74HC138G-R16-R U74HC138L-P16-R U74HC138G-P16-R Package DIP-16 SOP-16 SSOP-16 TSSOP-16 CMOS IC DIP-16 SOP-16 SSOP-16 TSSOP-16 Packing Tube Tape Reel Tape Reel Tape Reel www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd 1 of 6 QW-R502-614.F U74HC138  MARKING Package DIP-16 SOP-16 TSSOP-16 CMOS IC Marking 16 15 14 13 12 11 10 UTC U74HC138 9 1 2345 6 7 8 Date Code L: Lead Free G: Halogen Free Lot Code SSOP-16  PIN CONFIGURATION A0 1 A1 2 A2 3 E1 4 E2 5 E3 6 Y7 GND 7 8 16 VCC 15 Y0 14 Y1 13 Y2 12 Y3 11 Y4 10 Y5 9 Y6  FUNCTION TABLE INPUTS OUTPUTS E1 E2 E3 A0 A1 A2 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 HXXXXXHHHHHHHH XHXXXXHHHHHHHH XX L XXXHHHHHHHH L LHL L L LHHHHHHH L LHHL LHLHHHHHH L LHLHLHHLHHHHH L LHHHLHHHLHHHH L LHL LHHHHHLHHH L LHHLHHHHHHLHH L LHLHHHHHHHHLH L LHHHHHHHHHHHL Note: H: High voltage level L: Low voltage level X: Don’t care UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R502-614.F U74HC138  LOGIC SYMBOL  LOGIC DIAGRAM E1 E2 E3 A0 A1 A2 CMOS IC Y3 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 6 QW-R502-614.F U74HC138 CMOS IC  ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT Supply Voltage Input Clamp Current(VI<0 or VI>VCC) VCC IIK -0.5 ~ 7.0 ±20 V mA Output Clamp Current(VO<0 or VO>VCC) Continuous Output Current(VO=0 ~ VCC) IOK IO ±20 mA ±25 mA VCC or GND Current Storage Temperature ICC TSTG ±50 -65 ~ + 150 mA °C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied.  RECOMMENDED OPERATING CONDITIONS PARAMETER Supply Voltage Input Voltage Output Voltage Operating Temperature Input Rise or Fall Times SYMBOL VCC VIN VOUT TA tR, tF TEST CONDITIONS Operating VCC=2.0V VCC=4.5V VCC=6.0V MIN TYP MAX UNIT 2.0 5.0 6.0 V 0 VCC V 0 VCC V -40 +85 °C 1000 500 ns 400  THERMAL CHARACTERISTICS PARAMETER Junction to Ambient DIP-16 SOP-16 SSOP-16 TSSOP-16 SYMBOL θJA RATINGS 67 73 90 108 UNIT °C/W  ELECTRICAL CHARACTERISTICS (TA=25°C) PARAMETER High-level input voltage Low-level output voltage High-Level Output Voltage Low-Level Output Voltage Input Leakage Current Quiescent Supply Current Input Capacitance SYMBOL VIH VIL VOH VOL II(LEAK) ICC CI TEST CONDITIONS VCC=2V VCC=4.5V VCC=6V VCC=2V VCC=4.5V VCC=6V VCC=2V, IOH=-20μA VCC=4.5V, IOH=-20μA VCC=6V, IOH=-20μA VCC=4.5V, IOH=-4.0mA VCC=6V, IOH=-5.2mA VCC=2V, IOL=20μA VCC=4.5V, IOL=20μA VCC=6V, IOL=20μA VCC=4.5V, IOL=4mA VCC=6V, IOL=5.2mA VCC=6V, VIN= VCC or GND VCC=6V, VIN=VCC or GND, IOUT=0 VCC=2~6V MIN TYP MAX UNIT 1.5 V 3.15 V 4.2 V 0.5 V 1.35 V 1.8 V 1.9 1.998 V 4.4 4.499 V 5.9 5.999 V 3.98 4.3 V 5.48 5.8 V 0.002 0.1 V 0.001 0.1 V 0.001 0.1 V 0.17 0.26 V 0.15 0.26 V ±0.1 ±100 nA 8 μA 3 10 pF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 6 QW-R502-614.F U74HC138 CMOS IC  SWITCHING CHARACTERISTICS (TA=25°C, CL=50pF, see Test Circuit and Waveforms) PARAMETER Propagation delay from input (An) to output( Yn ) Propagation delay from input (E3) to output( Yn ) Propagation delay from input ( En ) to output( Yn ) Output Transition Time SYMBOL tPLH/tPHL tPLH/tPHL tPLH/tPHL tTLH/tTHL TEST CONDITIONS VCC =2.0V VCC =4.5V VCC =6.0V VCC =2.0V VCC =4.5V VCC =6.0V VCC =2.0V VCC =4.5V VCC =6.0V VCC =2.0V VCC =4.5V VCC =6.0V MIN TYP MAX UNIT 67 180 ns 18 36 ns 15 31 ns 66 155 ns 18 31 ns 15 26 ns 66 155 ns 18 31 ns 15 26 ns 38 75 ns 8 15 ns 6 13 ns  OPERATING CHARACTERISTICS PARAMETER Power Dissipation Capacitance SYMBOL TEST CONDITIONS CPD No Load MIN TYP MAX UNIT 85 pF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 6 QW-R502-614.F U74HC138  TEST CIRCUIT AND WAVEFORMS CMOS IC Test Circuit Input Output 50% tPHL 90% 50% 10% tTHL 50% tPLH 10% 50% tTLH VCC GND 90% VOH VOL Output tTLH 10% tPLH 90% 50% 90% tTHL 50% tPHL VOH 10% VOL Propagation Delay and Output Transition Times Note: CL includes probe and jig capacitance. All input pu.


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