MC74AC138, MC74ACT138 1-of-8 Decoder/Demultiplexer The MC74AC138/74ACT138 is a high−speed 1−of−8 decoder/demultiplexer. This device is ideally suited for high−speed bipolar memory chip select address decoding. The multiple input enables allow parallel expansion to a 1−of−24 www.onsemi.com decoder using just three MC74AC138/74ACT138 devices or a 1−of−32 decoder using four MC74AC138/74ACT138 devices and one MARKING DIAGRAMS inverter. • 16 Demultiplexing Capability SOIC−16 • xxx138G Multiple Input Enable for Easy Expansion 16 D SUFFIX AWLYWW • CASE 751B Active LOW Mutually Exclusive Outputs 1 1 • Outputs Source/Sink 24 mA • ′ACT138 Has TTL Compatible Inputs 16 • xxx These are Pb−Free Devices TSSOP−16 138 16 DT SUFFIX ALYW(cid:2) (cid:2) VCC O0 O1 O2 O3 O4 O5 O6 1 CASE 948F 1 16 15 14 13 12 11 10 9 xxx = AC or ACT A = Assembly Location WL or L = Wafer Lot Y = Year WW or W= Work Week G or (cid:2) = Pb−Free Package (Note: Microdot may be in either location) 1 2 3 4 5 6 7 8 A0 A1 A2 E1 E2 E3 O7 GND Figure 1. Pinout: 16−Lead Packages Conductors (Top View) ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 7 of this data sheet. A0 A1 A2 E1 E2 E3 O0 O1 O2 O3 O4 O5 O6 O7 Figure 2. Logic Symbol PIN ASSIGNMENT PIN FUNCTION A0−A2 Address Inputs E1−E2 Enable Inputs E3 Enable Input O0−O7 Outputs © Semiconductor Components Industries, LLC, 2015 1 Publication Order Number: January, 2015 − Rev. 7 MC74AC138/D

MC74AC138, MC74ACT138 FUNCTIONAL DESCRIPTION HIGH. This multiple enabled function allows easy parallel expansion of the device to a 1−of−32 (5 lines to 32 lines) The MC74AC138/74ACT138 high−speed 1−of−8 decoder with just four MC74AC138/74ACT138 devices decoder/demultiplexer accepts three binary weighted inputs and one inverter (See Figure 4). The (A , A , A ) and, when enabled, provides eight mutually 0 1 2 MC74AC138/74ACT138 can be used as an 8−output exclusive active−LOW outputs (O −O ). The 0 7 demultiplexer by using one of the active LOW Enable inputs MC74AC138/74ACT138 features three Enable inputs, two as the data input and the other Enable inputs as strobes. The active−LOW (E , E ) and one active−HIGH (E ). All 1 2 3 Enable inputs which are not used must be permanently tied outputs will be HIGH unless E and E are LOW and E is 1 2 3 to their appropriate active−HIGH or active−LOW state. TRUTH TABLE Inputs Outputs E1 E2 E3 A0 A1 A2 O0 O1 O2 O3 O4 O5 O6 O7 H X X X X X H H H H H H H H X H X X X X H H H H H H H H X X L X X X H H H H H H H H L L H L L L L H H H H H H H L L H H L L H L H H H H H H L L H L H L H H L H H H H H L L H H H L H H H L H H H H L L H L L H H H H H L H H H L L H H L H H H H H H L H H L L H L H H H H H H H H L H L L H H H H H H H H H H H L H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial A2 A1 A0 E1 E2E3 07 06 05 04 03 02 01 00 NOTE: This diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. Figure 3. Logic Diagram www.onsemi.com 2

MC74AC138, MC74ACT138 A0 A1 A2 ′04 A3 A4 H 123 123 123 123 A0 A1 A2 E A0 A1 A2 E A0 A1 A2 E A0 A1 A2 E 00 01 02 03 04 05 06 07 00 01 02 03 04 05 06 07 00 01 02 03 04 05 06 07 00 01 02 03 04 05 06 07 00 031 Figure 4. Expansion to 1−of−32 Decoding www.onsemi.com 3

MC74AC138, MC74ACT138 MAXIMUM RATINGS Symbol Parameter Value Unit VCC DC Supply Voltage (cid:2)0.5 to (cid:3)7.0 V VI DC Input Voltage (cid:2)0.5 (cid:4) VI (cid:4) VCC (cid:3)0.5 V VO DC Output Voltage (Note 1) (cid:2)0.5 (cid:4) VO (cid:4) VCC (cid:3)0.5 V IIK DC Input Diode Current (cid:5)20 mA IOK DC Output Diode Current (cid:5)50 mA IO DC Output Sink/Source Current (cid:5)50 mA ICC DC Supply Current per Output Pin (cid:5)50 mA IGND DC Ground Current per Output Pin (cid:5)50 mA TSTG Storage Temperature Range (cid:2)65 to (cid:3)150 °C TL Lead temperature, 1 mm from Case for 10 Seconds 260 °C TJ Junction temperature under Bias (cid:3)150 °C (cid:2) Thermal Resistance (Note 2) SOIC 69.1 °C/W JA TSSOP 103.8 PD Power Dissipation in Still Air at 65°C (Note 3) SOIC 500 mW TSSOP 500 MSL Moisture Sensitivity Level 1 FR Flammability Rating Oxygen Index: 30% − 35% UL 94 V−0 @ 0.125 in VESD ESD Withstand Voltage Human Body Model (Note 4) > 2000 V Machine Model (Note 5) > 200 Charged Device Model (Note 6) > 1000 ILatch−Up Latch−Up Performance Above VCC and Below GND at 85°C (Note 7) (cid:5)100 mA Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. 1. IO absolute maximum rating must be observed. 2. The package thermal impedance is calculated in accordance with JESD51−7. 3. 500 mW at 65°C; derate to 300 mW by 10 mW/ from 65°C to 85°C. 4. Tested to EIA/JESD22−A114−A. 5. Tested to EIA/JESD22−A115−A. 6. Tested to JESD22−C101−A. 7. Tested to EIA/JESD78. RECOMMENDED OPERATING CONDITIONS Symbol Parameter Min Typ Max Unit ′AC 2.0 5.0 6.0 VCC Supply Voltage ′ACT 4.5 5.0 5.5 V VIN, VOUT DC Input Voltage, Output Voltage (Ref. to GND) 0 − VCC V VCC @ 3.0 V − 150 − Input Rise and Fall Time (Note 1) tr, tf ′AC Devices except Schmitt Inputs VCC @ 4.5 V − 40 − ns/V VCC @ 5.5 V − 25 − Input Rise and Fall Time (Note 2) VCC @ 4.5 V − 10 − tr, tf ′ACT Devices except Schmitt Inputs VCC @ 5.5 V − 8.0 − ns/V TJ Junction Temperature (PDIP) − − 140 °C TA Operating Ambient Temperature Range −40 25 85 °C IOH Output Current − High − − −24 mA IOL Output Current − Low − − 24 mA Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability. 1. VIN from 30% to 70% VCC; see individual Data Sheets for devices that differ from the typical input rise and fall times. 2. VIN from 0.8 V to 2.0 V; see individual Data Sheets for devices that differ from the typical input rise and fall times. www.onsemi.com 4

MC74AC138, MC74ACT138 DC CHARACTERISTICS 74AC 74AC Symbol Parameter V(VCC) TA = +25°C −40°CT tAo = +85°C Unit Conditions Typ Guaranteed Limits VIH Minimum High Level 3.0 1.5 2.1 2.1 VOUT = 0.1 V Input Voltage 4.5 2.25 3.15 3.15 V or VCC − 0.1 V 5.5 2.75 3.85 3.85 VIL Maximum Low Level 3.0 1.5 0.9 0.9 VOUT = 0.1 V Input Voltage 4.5 2.25 1.35 1.35 V or VCC − 0.1 V 5.5 2.75 1.65 1.65 VOH Minimum High Level 3.0 2.99 2.9 2.9 IOUT = −50 μA Output Voltage 4.5 4.49 4.4 4.4 V 5.5 5.49 5.4 5.4 *VIN = VIL or VIH 3.0 − 2.56 2.46 −12 mA V 4.5 − 3.86 3.76 IOH −24 mA 5.5 − 4.86 4.76 −24 mA VOL Maximum Low Level 3.0 0.002 0.1 0.1 IOUT = 50 μA Output Voltage 4.5 0.001 0.1 0.1 V 5.5 0.001 0.1 0.1 *VIN = VIL or VIH 3.0 − 0.36 0.44 12 mA V 4.5 − 0.36 0.44 IOL 24 mA 5.5 − 0.36 0.44 24 mA IIN MLeaaxkimaguem C Iunrpruetnt 5.5 − ±0.1 ±1.0 μA VI = VCC, GND IOLD †Minimum Dynamic 5.5 − − 75 mA VOLD = 1.65 V Max Output Current IOHD 5.5 − − −75 mA VOHD = 3.85 V Min ICC MSuapxpimlyu Cmu Qrreunietscent 5.5 − 8.0 80 μA VIN = VCC or GND *All outputs loaded; thresholds on input associated with output under test. †Maximum test duration 2.0 ms, one output loaded at a time. NOTE: IIN and ICC @ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V VCC. AC CHARACTERISTICS 74AC 74AC Symbol Parameter VCC* TA = +25°C TA = −40°C to +85°C Unit Fig. (V) CL = 50 pF CL = 50 pF No. Min Typ Max Min Max Propagation Delay 3.3 1.5 8.5 13.0 1.5 15.0 tPLH An to On 5.0 1.5 6.5 9.5 1.5 10.5 ns 3−6 Propagation Delay 3.3 1.5 8.0 12.5 1.5 14.0 tPHL An to On 5.0 1.5 6.0 9.0 1.5 10.5 ns 3−6 Propagation Delay 3.3 1.5 11.0 15.0 1.5 16.0 tPLH E1 or E2 to On 5.0 1.5 8.0 11.0 1.5 12.0 ns 3−6 Propagation Delay 3.3 1.5 9.5 13.5 1.5 15.0 tPHL E1 or E2 to On 5.0 1.5 7.0 9.5 1.5 10.5 ns 3−6 Propagation Delay 3.3 1.5 11.0 15.5 1.5 16.5 tPLH E3 to On 5.0 1.5 8.0 11.0 1.5 12.5 ns 3−6 Propagation Delay 3.3 1.5 8.5 13.0 1.5 14.0 tPHL E3 to On 5.0 1.5 6.0 8.0 1.0 9.5 ns 3−6 *Voltage Range 3.3 V is 3.3 V ±0.3 V. *Voltage Range 5.0 V is 5.0 V ±0.5 V. www.onsemi.com 5

MC74AC138, MC74ACT138 DC CHARACTERISTICS 74ACT 74ACT Symbol Parameter V(VCC) TA = +25°C −40°CT tAo = +85°C Unit Conditions Typ Guaranteed Limits VIH Minimum High Level 4.5 1.5 2.0 2.0 VOUT = 0.1 V V Input Voltage 5.5 1.5 2.0 2.0 or VCC − 0.1 V VIL Maximum Low Level 4.5 1.5 0.8 0.8 VOUT = 0.1 V V Input Voltage 5.5 1.5 0.8 0.8 or VCC − 0.1 V VOH Minimum High Level 4.5 4.49 4.4 4.4 IOUT = −50 μA V Output Voltage 5.5 5.49 5.4 5.4 *VIN = VIL or VIH 4.5 − 3.86 3.76 V −24 mA 5.5 − 4.86 4.76 IOH −24 mA VOL Maximum Low Level 4.5 0.001 0.1 0.1 IOUT = 50 μA V Output Voltage 5.5 0.001 0.1 0.1 *VIN = VIL or VIH 4.5 − 0.36 0.44 V 24 mA 5.5 − 0.36 0.44 IOL 24 mA IIN MLeaaxkimaguem C Iunrpruetnt 5.5 − ±0.1 ±1.0 μA VI = VCC, GND ΔICCT Additional Max. ICC/Input 5.5 0.6 − 1.5 mA VI = VCC −2.1 V IOLD †Minimum Dynamic 5.5 − − 75 mA VOLD = 1.65 V Max Output Current IOHD 5.5 − − −75 mA VOHD = 3.85 V Min ICC MSuapxpimlyu Cmu Qrreunietscent 5.5 − 8.0 80 μA VIN = VCC or GND *All outputs loaded; thresholds on input associated with output under test. †Maximum test duration 2.0 ms, one output loaded at a time. AC CHARACTERISTICS 74ACT 74ACT Symbol Parameter VCC* TA = +25°C TA = −40°C to +85°C Unit Fig. (V) CL = 50 pF CL = 50 pF No. Min Typ Max Min Max Propagation Delay tPLH An to On 5.0 1.5 7.0 10.5 1.5 11.5 ns 3−6 Propagation Delay tPHL An to On 5.0 1.5 6.5 10.5 1.5 11.5 ns 3−6 Propagation Delay tPLH E1 or E2 to On 5.0 2.5 8.0 11.5 2.0 12.5 ns 3−6 Propagation Delay tPHL E1 or E2 to On 5.0 2.0 7.5 11.5 2.0 12.5 ns 3−6 Propagation Delay tPLH E3 to On 5.0 2.5 8.0 12.0 2.0 13.0 ns 3−6 Propagation Delay tPHL E3 to On 5.0 2.0 6.5 10.5 1.5 11.5 ns 3−6 *Voltage Range 5.0 V is 5.0 V ± 0.5 V CAPACITANCE Value Symbol Parameter Unit Test Conditions Typ CIN Input Capacitance 4.5 pF VCC = 5.0 V CPD Power Dissipation Capacitance 60 pF VCC = 5.0 V www.onsemi.com 6

MC74AC138, MC74ACT138 ORDERING INFORMATION Device Order Number Package Shipping† MC74AC138DG SOIC−16 48 Units / Rail (Pb−Free) MC74AC138DR2G SOIC−16 2500 Tape & Reel (Pb−Free) MC74AC138DTR2G TSSOP−16 2500 Tape & Reel (Pb−Free) MC74ACT138DG SOIC−16 48 Units / Rail (Pb−Free) MC74ACT138DR2G SOIC−16 2500 Tape & Reel (Pb−Free) MC74ACT138DTR2G TSSOP−16 2500 Tape & Reel (Pb−Free) †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. www.onsemi.com 7

MC74AC138, MC74ACT138 PACKAGE DIMENSIONS SOIC−16 D SUFFIX CASE 751B−05 ISSUE K −A− NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 16 9 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. −B− P8 PL 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION 1 8 0.25 (0.010) M B S SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. MILLIMETERS INCHES DIM MIN MAX MIN MAX G A 9.80 10.00 0.386 0.393 B 3.80 4.00 0.150 0.157 C 1.35 1.75 0.054 0.068 F D 0.35 0.49 0.014 0.019 K R X 45(cid:3) F 0.40 1.25 0.016 0.049 G 1.27 BSC 0.050 BSC J 0.19 0.25 0.008 0.009 C K 0.10 0.25 0.004 0.009 M 0 (cid:3) 7 (cid:3) 0 (cid:3) 7 (cid:3) −T− SEATING P 5.80 6.20 0.229 0.244 PLANE M J R 0.25 0.50 0.010 0.019 D 16 PL 0.25 (0.010) M T B S A S SOLDERING FOOTPRINT* 8X 6.40 16X1.12 1 16 16X 0.58 1.27 PITCH 8 9 DIMENSIONS: MILLIMETERS *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. www.onsemi.com 8

MC74AC138, MC74ACT138 PACKAGE DIMENSIONS TSSOP−16 DT SUFFIX CASE 948F ISSUE B 16X K REF NOTES: 0.10 (0.004) M T U S V S 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 0.15 (0.006) T U S K 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSION A DOES NOT INCLUDE MOLD ÇÉÇÉK1ÇÉ FLASH. PROTRUSIONS OR GATE BURRS. MOLD FLASH OR GATE BURRS SHALL NOT 2XL/2 16 9 J1 ÇÉÇÉÇÉ 4. EDXIMCEENESDI O0N.1 5B (D0.O00E6S) NPEORT SINIDCELU.DE INTERLEAD FLASH OR PROTRUSION. INTERLEAD FLASH OR PROTRUSION SHALL B SECTION N−N NOT EXCEED 0.25 (0.010) PER SIDE. L −U− J 5. DPRIMOETNRSUIOSINO NK .D AOLELOS WNAOBTL IEN CDLAUMDBEA DRAMBAR PROTRUSION SHALL BE 0.08 (0.003) TOTAL PIN 1 IN EXCESS OF THE K DIMENSION AT IDENT. N MAXIMUM MATERIAL CONDITION. 1 8 0.25 (0.010) 6. TERMINAL NUMBERS ARE SHOWN FOR REFERENCE ONLY. 7. DIMENSION A AND B ARE TO BE M DETERMINED AT DATUM PLANE −W−. 0.15 (0.006) T U S A N MILLIMETERS INCHES −V− DIM MIN MAX MIN MAX F A 4.90 5.10 0.193 0.200 B 4.30 4.50 0.169 0.177 DETAIL E C −−− 1.20 −−− 0.047 D 0.05 0.15 0.002 0.006 F 0.50 0.75 0.020 0.030 G 0.65 BSC 0.026 BSC C −W− H 0.18 0.28 0.007 0.011 J 0.09 0.20 0.004 0.008 J1 0.09 0.16 0.004 0.006 0.10 (0.004) K 0.19 0.30 0.007 0.012 −T− SEATING H DETAIL E K1 0.19 0.25 0.007 0.010 PLANE D G ML 06 .(cid:3) 4 0 BSC8 (cid:3) 00. 2(cid:3) 52 BS8C (cid:3) SOLDERING FOOTPRINT* 7.06 1 0.65 PITCH 16X 16X 0.36 1.26 DIMENSIONS: MILLIMETERS *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. www.onsemi.com 9

MC74AC138, MC74ACT138 ON Semiconductor and the are registered trademarks of Semiconductor Components Industries, LLC (SCILLC) or its subsidiaries in the United States and/or other countries. SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: N. American Technical Support: 800−282−9855 Toll Free ON Semiconductor Website: www.onsemi.com Literature Distribution Center for ON Semiconductor USA/Canada P.O. Box 5163, Denver, Colorado 80217 USA Europe, Middle East and Africa Technical Support: Order Literature: http://www.onsemi.com/orderlit Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Phone: 421 33 790 2910 Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada Japan Customer Focus Center For additional information, please contact your local Email: orderlit@onsemi.com Phone: 81−3−5817−1050 Sales Representative www.onsemi.com MC74AC138/D 10

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: O N Semiconductor: MC74AC138DG MC74AC138DR2G MC74AC138DTR2G MC74ACT138DG MC74ACT138DR2G MC74ACT138DTR2G