74HCT138 3 TO 8 LINE DECODER DEMULTIPLEXER Description Pin Assignments The 74HCT138 is a high speed CMOS device that is designed to be pin compatable with 74LS low power Schottky types. 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 Applications • Wide Supply Voltage Range from 4.5V to 5.5V • Memory chip select decoding • Sinks or sources 8mA at VCC = 4.5V • Demultiplexing • CMOS low power consumption • Single line peripheral control • Schmitt Trigger Action at All Inputs • Allow simple serial bit streams from a microcontroller to control as • Inputs accept up to 6.0V • ESD Protection Tested per JESD 22 many peripheral lines as needed. Exceeds 200-V Machine Model (A115-A) Exceeds 2000-V Human Body Model (A114-A) • Exceeds 1000-V Charged Device Model (C101C) Latch-Up Exceeds 250mA per JESD 78, 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 74HCT138 Document number: DS35489 Rev. 3 - 2 1 of 10 www.diodes.com June 2013 © Diodes Incorporated 74HCT138 Pin Descriptions Pin Number Pin Name 1 A0 Address Input 0 2 A1 Address Input 1 3 A2 Address Input 2 4 E1 Enable Input 1 (active LOW) 5 E2 6 E3 Enable Input 3 (active HIGH) 7 Y7 Output 7 (active LOW) 8 GND Description Enable Input 2 (active LOW) Ground 9 Y6 Output 6 (active LOW) 10 Y5 Output 5 (active LOW) 11 Y4 Output 4 (active LOW) 12 Y3 Output 3 (active LOW) 13 Y2 Output 2 (active LOW) 14 Y1 Output 1 (active LOW) 15 Y0 Output o (active LOW) 16 Vcc Supply Voltage Function Table Diagram Control Input Output E1 E2 E3 A2 A1 A0 Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 H X X X X X H H H H H H H 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 74HCT138 Document number: DS35489 Rev. 3 - 2 2 of 10 www.diodes.com June 2013 © Diodes Incorporated 74HCT138 Logic Diagram 74HCT138 Document number: DS35489 Rev. 3 - 2 3 of 10 www.diodes.com June 2013 © Diodes Incorporated 74HCT138 Absolute Maximum Ratings (Note 4) (@TA = +25°C, unless otherwise specified.) Symbol Description Rating Unit ESD HBM Human Body Model ESD Protection 2 KV ESD CDM Charged Device Model ESD Protection 1 KV ESD MM Machine Model ESD Protection 200 V VCC Supply Voltage Range -0.5 to 7.0 V VI Input Voltage Range -0.5 to 7.0 V Vo Voltage Applied to Output in High or Low State -0.3 to VCC V IIK Input Clamp Current VI < -0.5V -20 mA mA 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 Operating Junction Temperature -40 to 150 °C 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 VCC VI VO Min Max Unit Supply Voltage Parameter Conditions 4.5 5.5 V Input Voltage 0 Vcc V Active Mode 0 VCC V t/V Input transition rise or fall rate VCC = 4.5V 100 ns/V TA Operating free-air temperature -40 125 °C Note: Output Voltage 5. Unused inputs should be held at VCC or Ground. 74HCT138 Document number: DS35489 Rev. 3 - 2 4 of 10 www.diodes.com June 2013 © Diodes Incorporated 74HCT138 Electrical Characteristics (@TA = +25°C, unless otherwise specified.) Symbol Parameter VIH High-level Input Voltage VIL Low-level input voltage VOH High Level Output Voltage VOL Low-level Output Voltage II ICC ∆ICC Test Conditions Vcc -40°C to 85°C -40°C to 125°C Unit Min Typ Max Min Max Min Max 4.5V to 5.5V 2.0 1.6 2.0 2.0 V 4.5V to 5.5V 1.2 0.8 0.8 0.8 V IOH = -20 μA 4.5V 4.4 4.5 4.4 4.4 IOH = -4 mA 4.5V 3.98 4.32 3.85 3.7 IOL = 20 μA 4.5V 0 0.1 0.1 0.1 0.15 0.26 0.33 0.4 ±0.1 ±1 ±1 μA 8.0 80 160 μA 150 540 675 735 IOL = 4 mA 4.5V Input Current VI =GND to 5.5 V 5.5V Supply Current VI = GND or VCC IO=0 5.5V Additional Supply Current TA = 25°C V V Test Per Pin PINS An VI = PIN En 125 450 563 613 100 360 450 490 μA 4 10 10 10 pF μA 4.5V to 5.5V Vcc -2.1 V Other VI = Vcc or GND PIN E3 IO=0 Ci Input Vi = VCC or GND Capacitance 5.5V Switching Characteristics Symbol / Parameter tPLH, tPLH Propagation Delay tTLH, tTHL Transition Time Pins Test Conditions An to Yn Figure 2 E3 to Yn Figure 2 En to Yn Figure 2 Yn Figure 2 74HCT138 Document number: DS35489 Rev. 3 - 2 Vcc TA=25°C -40°C to 85°C -40°C to 125°C Min Typ. Max Min Max Min Max 4.5V 20 35 35 45 5.0V 17 4.5V 18 40 40 45 5.0V 19 4.5V 19 40 40 45 5.0V 19 4.5 V 7 15 15 110 5 of 10 www.diodes.com Unit ns ns June 2013 © Diodes Incorporated 74HCT138 Operating Characteristics (@TA = +25°C, unless otherwise specified.) Parameter Cpd VCC = 5V Test Conditions Power Dissipation Capacitance Unit TYP f = 1 MHz all outputs switching-no load 21 pF Parameter Measurement Information Inputs VCC VM CL 6ns VCC/2 50pF 6ns VCC/2 15pF used for 5V typical test VI tr/tf 4.5V 3V 5.0V 3V 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 74HCT138 Document number: DS35489 Rev. 3 - 2 6 of 10 www.diodes.com June 2013 © Diodes Incorporated 74HCT138 Ordering Information Device Package Code 74HCT138S16-13 74HCT138T16-13 Notes: 7” Tape and Reel(Note 7) Packaging (Note 6) Quantity Part Number Suffix S16 SO-16 2500/Tape & Reel -13 T16 TSSOP-16 2500/Tape & Reel -13 6. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. http://www.diodes.com/datasheets/ap02001.pdf. 7. The taping orientation is located on our website at http://www.diodes.com/datasheets/ap02007.pdf Marking Information (1) SO-16, TSSOP-16 Part Number 74HCT138 Document number: DS35489 Rev. 3 - 2 Package 74HCT138S16 SO-16 74HCT138T16 TSSOP-16 7 of 10 www.diodes.com June 2013 © Diodes Incorporated 74HCT138 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' 74HCT138 Document number: DS35489 Rev. 3 - 2 8 of 10 www.diodes.com June 2013 © Diodes Incorporated 74HCT138 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 Pin 1 Dimensions C X X1 Y Y1 Value (in mm) 1.270 0.670 9.560 1.450 6.400 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) 74HCT138 Document number: DS35489 Rev. 3 - 2 C 9 of 10 www.diodes.com June 2013 © Diodes Incorporated 74HCT138 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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