TC74VHC238F/FK TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74VHC238F, TC74VHC238FK 3-to-8 Line Decoder The TC74VHC238 is an advanced high speed CMOS 3-to-8 DECODER fabricated with silicon gate C2MOS technology. It achieves the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. When the device is enabled, 3 Binary Select inputs (A, B and C) determine which one of the outputs (Y0-Y7) will go High. When enable input G1 is held low or either G 2 A or G2B is held high, decoding function is inhibited and all outputs go Low. G1 G 2 A , and G2B inputs are provided to ease cascade connection and for use as an address decoder for memory systems. An input protection circuit ensures that 0 to 5.5 V can be applied to the input pins without regard to the supply voltage. This device can be used to interface 5 to 3 V systems and two supply systems such as battery back up. This circuit prevents device destruction due to mismatched supply and input voltages. Features TC74VHC238F TC74VHC238FK Weight SOP16-P-300-1.27A VSSOP16-P-0030-0.50 High speed: tpd = 5.5 ns (typ.) at VCC = 5 V Low power dissipation: ICC = 4 A (max) at Ta = 25C : 0.18 g (typ.) : 0.02 g (typ.) High noise immunity: VNIH = VNIL = 28% VCC (min) Power down protection is provided on all inputs. tpHL Balanced propagation delays: tpLH - Wide operating voltage range: VCC (opr) = 2 to 5.5 V Pin and function compatible with 74ALS238 Start of commercial production 1991-11 (c) 2015-2019 Toshiba Electronic Devices & Storage Corporation 1 2019-01-31 TC74VHC238F/FK Pin Assignment A 1 16 VCC B 2 15 Y0 C 3 14 Y1 4 13 Y2 5 12 Y3 G1 6 11 Y4 Y7 7 10 Y5 GND 8 9 Y6 (top view) IEC Logic Symbol A B C (1) (2) (3) 1 2 4 G1 (6) (4) (5) & BIN/OCT EN (15) (14) (13) (12) (11) (10) (9) (7) 0 1 2 3 4 5 6 7 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 A B C (1) (2) (3) 1 G1 (6) (4) (5) & DMUX (15) (14) (13) (12) (11) (10) (9) (7) 0 1 2 3 4 5 6 7 2 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 Truth Table Inputs Outputs Enable Select Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 Selected Output G1 G2 A G 2B C B A L X X X X X L L L L L L L L None X H X X X X L L L L L L L L None X X H X X X L L L L L L L L None H L L L L L H L L L L L L L Y0 H L L L L H L H L L L L L L Y1 H L L L H L L L H L L L L L Y2 H L L L H H L L L H L L L L Y3 H L L H L L L L L L H L L L Y4 H L L H L H L L L L L H L L Y5 H L L H H L L L L L L L H L Y6 H L L H H H L L L L L L L H Y7 X: Don't care (c) 2015-2019 Toshiba Electronic Devices & Storage Corporation 2 2019-01-31 TC74VHC238F/FK Logic Diagram 15 A Select inputs B C 14 1 13 12 2 11 10 3 9 7 4 Enable inputs Y0 Y1 Y2 Y3 Y4 Data outputs Y5 Y6 Y7 5 G1 6 Absolute Maximum Ratings (Note) Characteristics Symbol Rating Unit Supply voltage range VCC -0.5 to 7.0 V DC input voltage VIN -0.5 to 7.0 V DC output voltage VOUT -0.5 to VCC + 0.5 V Input diode current IIK -20 mA Output diode current IOK 20 mA DC output current IOUT 25 mA DC VCC/ground current ICC 75 mA Power dissipation PD 180 mW Storage temperature Tstg -65 to 150 C Note: Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or even destruction. Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the significant change in temperature, etc.) may cause this product to decrease in the reliability significantly even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute maximum ratings and the operating ranges. Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook ("Handling Precautions"/"Derating Concept and Methods") and individual reliability data (i.e. reliability test report and estimated failure rate, etc). Operating Range (Note) Characteristics Symbol Rating Unit Supply voltage VCC 2.0 to 5.5 V Input voltage VIN 0 to 5.5 V Output voltage VOUT 0 to VCC V Operating temperature Topr -40 to 85 C Input rise and fall time dt/dv 0 to 100 (VCC = 3.3 0.3 V) 0 to 20 (VCC = 5 0.5 V) ns/V Note: The operating range must be maintained to ensure the normal operation of the device. Unused inputs must be tied to either VCC or GND. (c) 2015-2019 Toshiba Electronic Devices & Storage Corporation 3 2019-01-31 TC74VHC238F/FK Electrical Characteristics DC Characteristics Characteristics Test Condition Symbol Ta = -40 to 85C Ta = 25C VCC (V) Min Typ. Max Min Max 1.50 VCC x 0.7 0.50 VCC x 0.3 High-level input voltage VIH 2.0 3.0 to 5.5 1.50 VCC x 0.7 Low-level input voltage VIL 2.0 3.0 to 5.5 0.50 VCC x 0.3 IOH = -50 A 2.0 3.0 4.5 1.9 2.9 4.4 2.0 3.0 4.5 1.9 2.9 4.4 IOH = -4 mA IOH = -8 mA 3.0 4.5 2.58 3.94 2.48 3.80 IOL = 50 A 2.0 3.0 4.5 0.0 0.0 0.0 0.1 0.1 0.1 0.1 0.1 0.1 IOL = 4 mA IOL = 8 mA 3.0 4.5 0.36 0.36 0.44 0.44 High-level output voltage Low-level output voltage VOH VOL VIN = VIH or VIL VIN = VIH or VIL Unit V V V V Input leakage current IIN VIN = 5.5 V or GND 0 to 5.5 0.1 1.0 A Quiescent supply current ICC VIN = VCC or GND 5.5 4.0 40.0 A (c) 2015-2019 Toshiba Electronic Devices & Storage Corporation 4 2019-01-31 TC74VHC238F/FK AC Characteristics (input: tr = tf = 3 ns) Characteristics Propagation delay time (A, B, C-Y) Propagation delay time (G1-Y) Propagation delay time ( G2 -Y) Test Condition Symbol tpLH tpHL tpLH tpHL tpLH tpHL Input capacitance CIN Power dissipation capacitance CPD VCC (V) Ta = -40 to 85C Ta = 25C Unit CL (pF) Min Typ. Max Min Max 15 8.0 12.3 1.0 14.5 50 10.5 15.8 1.0 18.0 15 5.5 8.1 1.0 9.5 50 7.0 10.1 1.0 11.5 15 8.1 12.8 1.0 15.0 50 10.6 16.3 1.0 18.5 15 5.4 8.1 1.0 9.5 50 6.9 10.1 1.0 11.5 15 8.1 12.3 1.0 14.5 50 10.6 15.8 1.0 18.0 15 5.7 8.1 1.0 9.5 50 7.2 10.1 1.0 11.5 4 10 10 pF 37 pF 3.3 0.3 5.0 0.5 3.3 0.3 5.0 0.5 3.3 0.3 5.0 0.5 (Note) ns ns ns Note: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load. Average operating current can be obtained by the equation: ICC (opr) = CPD*VCC*fIN + ICC Input Equivalent Circuit INPUT (c) 2015-2019 Toshiba Electronic Devices & Storage Corporation 5 2019-01-31 TC74VHC238F/FK Package Dimensions Weight: 0.18 g (typ.) (c) 2015-2019 Toshiba Electronic Devices & Storage Corporation 6 2019-01-31 TC74VHC238F/FK Package Dimensions Weight: 0.02 g (typ.) (c) 2015-2019 Toshiba Electronic Devices & Storage Corporation 7 2019-01-31 TC74VHC238F/FK RESTRICTIONS ON PRODUCT USE Toshiba Corporation and its subsidiaries and affiliates are collectively referred to as "TOSHIBA". Hardware, software and systems described in this document are collectively referred to as "Product". * TOSHIBA reserves the right to make changes to the information in this document and related Product without notice. * This document and any information herein may not be reproduced without prior written permission from TOSHIBA. Even with TOSHIBA's written permission, reproduction is permissible only if reproduction is without alteration/omission. * Though TOSHIBA works continually to improve Product's quality and reliability, Product can malfunction or fail. Customers are responsible for complying with safety standards and for providing adequate designs and safeguards for their hardware, software and systems which minimize risk and avoid situations in which a malfunction or failure of Product could cause loss of human life, bodily injury or damage to property, including data loss or corruption. Before customers use the Product, create designs including the Product, or incorporate the Product into their own applications, customers must also refer to and comply with (a) the latest versions of all relevant TOSHIBA information, including without limitation, this document, the specifications, the data sheets and application notes for Product and the precautions and conditions set forth in the "TOSHIBA Semiconductor Reliability Handbook" and (b) the instructions for the application with which the Product will be used with or for. Customers are solely responsible for all aspects of their own product design or applications, including but not limited to (a) determining the appropriateness of the use of this Product in such design or applications; (b) evaluating and determining the applicability of any information contained in this document, or in charts, diagrams, programs, algorithms, sample application circuits, or any other referenced documents; and (c) validating all operating parameters for such designs and applications. TOSHIBA ASSUMES NO LIABILITY FOR CUSTOMERS' PRODUCT DESIGN OR APPLICATIONS. * PRODUCT IS NEITHER INTENDED NOR WARRANTED FOR USE IN EQUIPMENTS OR SYSTEMS THAT REQUIRE EXTRAORDINARILY HIGH LEVELS OF QUALITY AND/OR RELIABILITY, AND/OR A MALFUNCTION OR FAILURE OF WHICH MAY CAUSE LOSS OF HUMAN LIFE, BODILY INJURY, SERIOUS PROPERTY DAMAGE AND/OR SERIOUS PUBLIC IMPACT ("UNINTENDED USE"). Except for specific applications as expressly stated in this document, Unintended Use includes, without limitation, equipment used in nuclear facilities, equipment used in the aerospace industry, lifesaving and/or life supporting medical equipment, equipment used for automobiles, trains, ships and other transportation, traffic signaling equipment, equipment used to control combustions or explosions, safety devices, elevators and escalators, and devices related to power plant. IF YOU USE PRODUCT FOR UNINTENDED USE, TOSHIBA ASSUMES NO LIABILITY FOR PRODUCT. For details, please contact your TOSHIBA sales representative or contact us via our website. * Do not disassemble, analyze, reverse-engineer, alter, modify, translate or copy Product, whether in whole or in part. * Product shall not be used for or incorporated into any products or systems whose manufacture, use, or sale is prohibited under any applicable laws or regulations. * The information contained herein is presented only as guidance for Product use. No responsibility is assumed by TOSHIBA for any infringement of patents or any other intellectual property rights of third parties that may result from the use of Product. No license to any intellectual property right is granted by this document, whether express or implied, by estoppel or otherwise. * ABSENT A WRITTEN SIGNED AGREEMENT, EXCEPT AS PROVIDED IN THE RELEVANT TERMS AND CONDITIONS OF SALE FOR PRODUCT, AND TO THE MAXIMUM EXTENT ALLOWABLE BY LAW, TOSHIBA (1) ASSUMES NO LIABILITY WHATSOEVER, INCLUDING WITHOUT LIMITATION, INDIRECT, CONSEQUENTIAL, SPECIAL, OR INCIDENTAL DAMAGES OR LOSS, INCLUDING WITHOUT LIMITATION, LOSS OF PROFITS, LOSS OF OPPORTUNITIES, BUSINESS INTERRUPTION AND LOSS OF DATA, AND (2) DISCLAIMS ANY AND ALL EXPRESS OR IMPLIED WARRANTIES AND CONDITIONS RELATED TO SALE, USE OF PRODUCT, OR INFORMATION, INCLUDING WARRANTIES OR CONDITIONS OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, ACCURACY OF INFORMATION, OR NONINFRINGEMENT. * Do not use or otherwise make available Product or related software or technology for any military purposes, including without limitation, for the design, development, use, stockpiling or manufacturing of nuclear, chemical, or biological weapons or missile technology products (mass destruction weapons). Product and related software and technology may be controlled under the applicable export laws and regulations including, without limitation, the Japanese Foreign Exchange and Foreign Trade Law and the U.S. Export Administration Regulations. Export and re-export of Product or related software or technology are strictly prohibited except in compliance with all applicable export laws and regulations. * Please contact your TOSHIBA sales representative for details as to environmental matters such as the RoHS compatibility of Product. Please use Product in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances, including without limitation, the EU RoHS Directive. TOSHIBA ASSUMES NO LIABILITY FOR DAMAGES OR LOSSES OCCURRING AS A RESULT OF NONCOMPLIANCE WITH APPLICABLE LAWS AND REGULATIONS. https://toshiba.semicon-storage.com/ (c) 2015-2019 Toshiba Electronic Devices & Storage Corporation 8 2019-01-31