74HC138 3 TO 8 LINE DECODER DEMULTIPLEXER Description Pin Assignments The 74HC138 is a high speed CMOS device. The device accepts a three bit binary weighted address on input pins A0, A1 and A2 and when enabled will produce one active low output with the remaing seven being high. There are two active LOW enable inputs E1 and E2, and one active HIGH enable input E3. The disabled device state results in all outputs being high. The enable state occurs with E1 and E2 asserted low and E3 asserted high. The multiple enable lines allow for the parallel expansion of decoders to create 4-to-16 line versions with no additional parts and 5-to-32 versions with the addition of a single inverter. Features Wide Supply Voltage Range from 2.0V to 6.0V Sinks or sources 8 mA at VCC = 4.5V CMOS low power consumption Schmitt Trigger Action at All Inputs Inputs Accept up to 6.0V ESD Protection Tested per JESD 22 Exceeds 200-V Machine Model (A115-A) Exceeds 2000-V Human Body Model (A114-A) Exceeds 1000-V Charged Device Model (C101C) Applications Memory chip select decoding Demultiplexing Single line peripheral control Allow simple serial bit streams from a microcontroller to control as many peripheral lines as needed Latch-Up Exceeds 100mA per JESD 78D, Class II Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See http://www.diodes.com for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. Click here for ordering information, located at the end of datasheet 74HC138 Document number: DS35488 Rev.3 - 2 1 of 10 www.diodes.com June 2013 © Diodes Incorporated 74HC138 Pin Descriptions Pin Number 1 2 3 4 Pin Name A0 A1 A2 E1 Enable Input 1 (active LOW) 5 E2 E3 Y7 GND Y6 Y5 Y4 Y3 Y2 Y1 Y0 Vcc Enable Input 3 (active HIGH) Output 7 (active LOW) Ground Output 6 (active LOW) Output 5 (active LOW) Output 4 (active LOW) Output 3 (active LOW) Output 2 (active LOW) Output 1 (active LOW) Output o (active LOW) Supply Voltage 6 7 8 9 10 11 12 13 14 15 16 Description Address Input 0 Address Input 1 Address Input 2 Enable Input 2 (active LOW) Function Table Diagram Control Input Output E1 H E2 X E3 A2 A1 A0 X X X X Y7 H Y6 H Y5 H Y4 H Y3 H Y2 H Y1 H Y0 H X H X X X L L L H L L L H H H H H H H L L L H H H H H H H L H L H L H H H H H L H H L H H H H H H L H H H H L L H H H L H H H H H L H H H L H H H H H H H L H L H H H H H H H H H L H H H H H H H 74HC138 Document number: DS35488 Rev.3 - 2 2 of 10 www.diodes.com June 2013 © Diodes Incorporated 74HC138 Logic Diagram 74HC138 Document number: DS35488 Rev.3 - 2 3 of 10 www.diodes.com June 2013 © Diodes Incorporated 74HC138 Absolute Maximum Ratings (Note 4) (@TA = +25°C, unless otherwise specified.) Symbol ESD HBM ESD CDM ESD MM Description Human Body Model ESD Protection Charged Device Model ESD Protection Machine Model ESD Protection Rating 2 1 200 Unit kV kV V V Supply Voltage Range -0.5 to +7.0 VI Input Voltage Range -0.5 to +7.0 V Vo Voltage applied to output in high or low state -0.3 to VCC +0.5 V IIK Input Clamp Current VI< -0.5V -20 mA mA VCC IIK Input Clamp Current VI > VCC +0.5V 20 IOK Output Clamp Current VO<-0.5V -20 mA IOK Output Clamp Current VO> VCC + 0.5V 20 mA IO Continuous output current ±25 mA ICC Continuous current through VCC 50 mA IGND Continuous current through GND -50 mA TJ °C Operating Junction Temperature -40 to +150 TSTG Storage Temperature -65 to +150 °C PTOT Total Power Dissipation 500 mW Note: 4. Stresses beyond the absolute maximum may result in immediate failure or reduced reliability. These are stress values and device operation should be within recommend values. Recommended Operating Conditions (Note 5) (@TA = +25°C, unless otherwise specified.) Symbol Min Max Supply Voltage 2.0 6.0 V VI Input Voltage 0 VCC V VO Output Voltage V VCC Parameter Conditions Active Mode 0 VCC VCC = 2.0V 1000 500 t/V Input transition Rise or Fall Rate VCC = 4.5V TA Operating Free-Air Temperature VCC = 6.0V Note: Unit ns/V 400 -40 +125 °C 5. Unused inputs should be held at VCC or Ground. 74HC138 Document number: DS35488 Rev.3 - 2 4 of 10 www.diodes.com June 2013 © Diodes Incorporated 74HC138 Electrical Characteristics (@TA = +25°C, unless otherwise specified.) Symbol VIH VIL VOH Parameter High-Level Input Voltage Low-Level Input Voltage High-Level Output Voltage 2.0V 4.5V TA = +25°C Min Typ Max 1.2 1.5 2.4 3.15 6.0V 4.2 2.0V 4.5V 6.0V Test Conditions IOH = -20 μA All outputs IOH = -4 mA IOH = -5.2 mA VOL Low-Level Output Voltage IOL = 20 μA All outputs IOL = 4 mA VCC TA = -40°C to +85°C Min Max TA = -40°C to +125°C Min Max 1.5 1.5 3.15 3.15 4.2 0.5 4.2 0.8 0.5 0.5 2.1 1.35 1.35 1.35 2.8 1.8 1.9 1.8 2.0 1.9 1.8 2.0V 1.9 4.5V 4.4 4.5 4.4 4.4 6.0V 5.9 6.0 5.9 5.9 4.5V 3.98 4.32 3.84 3.7 3.2 Unit V V 6.0V 5.48 5.81 5.34 5.2 2.0V 0 0.1 0.1 0.1 4.5V 0 0.1 0.1 0.1 6.0V 0 0.1 0.1 0.1 4.5V 0.15 0.26 0.33 0.4 V V IOL = 5.2 mA 6.0V 0.16 0.26 0.33 0.4 Input Current VI =GND or 6.0V 6.0V ±0.1 ±1 ±1 μA ICC Supply Current VI = GND or VCC IO = 0 6.0V 8.0 80 160 μA Ci Input Capacitance Vi = VCC or GND 6.0V 4 10 10 10 pF II Switching Characteristics Symbol / Parameter Pins Test Conditions An to Yn Figure 1 tPLH, tPLH E3 to Yn Figure 1 Propagation Delay En to Yn tTLH, tTHL Transition Time Yn 74HC138 Document number: DS35488 Rev.3 - 2 Figure 1 Figure 1 VCC Min TA = +25°C Typ Max -40°C to +85°C -40°C to +125°C Min Max Min Max 2.0V 41 150 190 225 4.5V 15 30 38 45 5.0V 12 12 33 6.0V 26 38 2.0V 47 150 190 225 4.5V 17 30 38 45 5.0V 14 6.0V 14 26 33 38 2.0V 47 150 190 225 4.5V 17 30 38 45 5.0V 14 6.0V 14 26 33 38 2.0V 19 75 95 110 5.0V 7 15 19 22 6.0V 6 13 16 19 5 of 10 www.diodes.com Unit ns ns June 2013 © Diodes Incorporated 74HC138 Operating Characteristics (@TA = +25°C, unless otherwise specified.) Test Conditions VCC = 5V Typ Unit f = 1 MHz all outputs switching-no load 19 pF Parameter Power dissipation capacitance Cpd Parameter Measurement Information Vcc 2.0V -6.0V 5.0V Inputs VI VCC tr/tf 6 ns VCC 6 ns CL VM VCC/2 50pF VCC/2 15pF used for 5V typical test Voltage Waveform Pulse Duration Voltage Waveform Propagation Delay Times Inverting and Non Inverting Outputs Notes: A. Includes test lead and test apparatus capacitance. B. All pulses are supplied at pulse repetition rate ≤ 10 MHz. C. Inputs are measured separately one transition per measurement D. tPLH and tPHL are the same as tPD Figure 1 Load Circuit and Voltage Waveforms 74HC138 Document number: DS35488 Rev.3 - 2 6 of 10 www.diodes.com June 2013 © Diodes Incorporated 74HC138 Ordering Information Notes: Part Number Package Code Packaging 74HC138S16-13 74HC138T16-13 S16 T16 SO-16 TSSOP-16 7” Tape and Reel (Note 6) Quantity Part Number Suffix 2500/Tape & Reel -13 2500/Tape & Reel -13 6. The taping orientation is located on our website at http://www.diodes.com/datasheets/ap02007.pdf Marking Information (1) SO-16, TSSOP16 Part Number 74HC138S16 74HC138T16 74HC138 Document number: DS35488 Rev.3 - 2 7 of 10 www.diodes.com Package SO-16 TSSOP-16 June 2013 © Diodes Incorporated 74HC138 Package Outline Dimensions (All dimensions in mm.) Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for latest version. Package Type: SO-16 H E Gauge Plane L Detail ‘A’ D A A2 e B A1 C SO-16 Dim Min Max A 1.40 1.75 A1 0.10 0.25 A2 1.30 1.50 B 0.33 0.51 C 0.19 0.25 D 9.80 10.00 E 3.80 4.00 e 1.27 Typ H 5.80 6.20 L 0.38 1.27 Θ 0 8 All Dimensions in mm Detail ‘A’ Package Type: TSSOP-16 E/2 SEE DETAIL 'A' E1 E Y X PIN 1 x) b e Ø0.760Depth0.050±0.02 A2 R1 D R L2 C GAUGE PLANE A L SEATING PLANE A1 L1 TSSOP-16 Dim Min Max Typ A 1.08 A1 0.05 0.15 A2 0.80 0.93 b 0.19 0.30 c 0.09 0.20 D 4.90 5.10 E 6.40 BSC E1 4.30 4.50 e 0.65 BSC L 0.45 0.75 L1 1.00 REF L2 0.25 BSC R 0.09 R1 0.09 X 1.350 Y 1.050 Θ 0° 8° Θ1 5° 15° Θ2 0° All Dimensions in mm DETAIL 'A' 74HC138 Document number: DS35488 Rev.3 - 2 8 of 10 www.diodes.com June 2013 © Diodes Incorporated 74HC138 Suggested Pad Layout Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version. Package Type: SO-16 X1 Y1 Y Dimensions C X X1 Y Y1 Value (in mm) 1.270 0.670 9.560 1.450 6.400 Pin 1 C X Package Type: TSSOP-16 X1 Dimensions C X X1 Y Y1 Y1 Y (16x) Value (in mm) 0.650 0.350 4.900 1.400 6.800 1 X (16x) 74HC138 Document number: DS35488 Rev.3 - 2 C 9 of 10 www.diodes.com June 2013 © Diodes Incorporated 74HC138 IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. 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