74HCT280D,652

74HC280; 74HCT280 9-bit odd/even parity generator/checker Rev. 3 — 15 September 2016 Product data sheet 1. General description The 74HC280; 74HCT280 is a 9-bit parity generator or checker. Both even and odd parity outputs are available. The even parity output (PE) is HIGH when an even number of data inputs (I0 to I8) is HIGH. The odd parity output (PO) is HIGH when an odd number of data inputs are HIGH. Expansion to larger word sizes is accomplished by tying the even outputs (PE) of up to nine parallel devices to the final stage data inputs. Inputs include clamp diodes. It enables the use of current limiting resistors to interface inputs to voltages in excess of VCC. 2. Features and benefits  Complies with JEDEC standard no. 7A  Input levels:  For 74HC280: CMOS level  For 74HCT280: TTL level  Word-length easily expanded by cascading  Generates either odd or even parity for nine data bits  ESD protection:  HBM JESD22-A114F exceeds 2000 V  MM JESD22-A115-A exceeds 200 V  Specified from 40 C to +85 C and 40 C to +125 C 3. Ordering information Table 1. Ordering information Type number Temperature range Name Description Version 74HC280D 40 C to +125 C SO14 plastic small outline package; 14 leads; body width 3.9 mm SOT108-1 40 C to +125 C SSOP14 plastic shrink small outline package; 14 leads; body width 5.3 mm SOT337-1 74HCT280D 74HCT280DB 74HC280; 74HCT280 Nexperia 9-bit odd/even parity generator/checker 4. Functional diagram  ,  ,  ,  ,  ,  ,  ,  ,  , 3(  32  DDD Fig 1. Logic symbol , , 3( , , , , 32 , , , DDD Fig 2. Logic diagram 74HC_HCT280 Product data sheet All information provided in this document is subject to legal disclaimers. . Rev. 3 — 15 September 2016 2 of 15 © Nexperia B.V. 2017. All rights reserved 74HC280; 74HCT280 Nexperia 9-bit odd/even parity generator/checker 5. Pinning information 5.1 Pinning +& +&7 +&7 ,   9&& ,   , ,  QF   , ,   9&&  , ,   , QF   , ,   ,  , 3(   ,  32   , *1'   , 3( 32 *1'     , , DDD Fig 3. DDD Pin configuration SO14 Fig 4. Pin configuration SSOP14 5.2 Pin description Table 2. Pin description Symbol Pin Description I0, I1, I2, I3, I4, I5, I6, I7, I8 8, 9, 10, 11, 12, 13, 1, 2, 4 data input GND 7 ground (0 V) PE 5 even parity output PO 6 odd parity output VCC 14 supply voltage 6. Functional description Table 3. Function table[1] Inputs Outputs number of HIGH data inputs (I0 to I8) PE PO even H L odd L H [1] H = HIGH voltage level; L = LOW voltage level 74HC_HCT280 Product data sheet All information provided in this document is subject to legal disclaimers. . Rev. 3 — 15 September 2016 3 of 15 © Nexperia B.V. 2017. All rights reserved 74HC280; 74HCT280 Nexperia 9-bit odd/even parity generator/checker 7. Limiting values Table 4. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V). Symbol Parameter Conditions Min Max Unit VCC supply voltage 0.5 +7 V IIK input clamping current VI < 0.5 V or VI > VCC + 0.5 V [1] - 20 mA IOK output clamping current VO < 0.5 V or VO > VCC + 0.5 V [1] - 20 mA IO output current 0.5 V < VO < VCC + 0.5 V - 25 mA ICC supply current - 50 mA IGND ground current 50 - mA Tstg storage temperature 65 +150 C - 500 mW total power dissipation Ptot [2] SO14 and SSOP14 packages [1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed. [2] For SO14 package: Ptot derates linearly with 8 mW/K above 70 C. For SSOP14 packages: Ptot derates linearly with 5.5 mW/K above 60 C. 8. Recommended operating conditions Table 5. Recommended operating conditions Voltages are referenced to GND (ground = 0 V) Symbol Parameter Conditions 74HC280 Min Typ 74HCT280 Max Min Typ Unit Max VCC supply voltage 2.0 5.0 6.0 4.5 5.0 5.5 V VI input voltage 0 - VCC 0 - VCC V VO output voltage 0 - VCC 0 - VCC V Tamb ambient temperature 40 +25 +125 40 +25 +125 C t/V input transition rise and fall rate 74HC_HCT280 Product data sheet VCC = 2.0 V - - 625 - - - ns/V VCC = 4.5 V - 1.67 139 - 1.67 139 ns/V VCC = 6.0 V - - 83 - - - ns/V All information provided in this document is subject to legal disclaimers. . Rev. 3 — 15 September 2016 4 of 15 © Nexperia B.V. 2017. All rights reserved 74HC280; 74HCT280 Nexperia 9-bit odd/even parity generator/checker 9. Static characteristics Table 6. Static characteristics At recommended operating conditions; voltages are referenced to GND (ground = 0 V). Symbol Parameter 25 C Conditions 40 C to +85 C 40 C to +125 C Unit Min Typ Max Min Max Min Max VCC = 2.0 V 1.5 1.2 - 1.5 - 1.5 - V VCC = 4.5 V 3.15 2.4 - 3.15 - 3.15 - V VCC = 6.0 V 4.2 3.2 - 4.2 - 4.2 - V VCC = 2.0 V - 0.8 0.5 - 0.5 - 0.5 V VCC = 4.5 V - 2.1 1.35 - 1.35 - 1.35 V VCC = 6.0 V - 2.8 1.8 - 1.8 - 1.8 V HIGH-level VI = VIH or VIL output voltage IO = 20 A; VCC = 2.0 V 1.9 2.0 - 1.9 - 1.9 - V IO = 20 A; VCC = 4.5 V 4.4 4.5 - 4.4 - 4.4 - V IO = 20 A; VCC = 6.0 V 5.9 6.0 - 5.9 - 5.9 - V IO = 4.0 mA; VCC = 4.5 V 3.98 4.32 - 3.84 - 3.7 - V IO = 5.2 mA; VCC = 6.0 V 5.48 5.81 - 5.34 - 5.2 - V 74HC280 VIH VIL VOH VOL HIGH-level input voltage LOW-level input voltage LOW-level VI = VIH or VIL output voltage IO = 20 A; VCC = 2.0 V - 0 0.1 - 0.1 - 0.1 V IO = 20 A; VCC = 4.5 V - 0 0.1 - 0.1 - 0.1 V IO = 20 A; VCC = 6.0 V - 0 0.1 - 0.1 - 0.1 V IO = 4.0 mA; VCC = 4.5 V - 0.15 0.26 - 0.33 - 0.4 V IO = 5.2 mA; VCC = 6.0 V - 0.16 0.26 - 0.33 - 0.4 V VI = VCC or GND; VCC = 6.0 V - - 0.1 - 1.0 - 1.0 A II input leakage current ICC supply current VI = VCC or GND; IO = 0 A; VCC = 6.0 V - - 8.0 - 80 - 160 A CI input capacitance - 3.5 - - - - - pF 74HCT280 VIH HIGH-level input voltage VCC = 4.5 V to 5.5 V 2.0 1.6 - 2.0 - 2.0 - V VIL LOW-level input voltage VCC = 4.5 V to 5.5 V - 1.2 0.8 - 0.8 - 0.8 V VOH HIGH-level VI = VIH or VIL; VCC = 4.5 V output voltage IO = 20 A 4.4 4.5 - 4.4 - 4.4 - V 3.98 4.32 - 3.84 - 3.7 - V - 0.1 V IO = 4.0 mA VOL LOW-level VI = VIH or VIL; VCC = 4.5 V output voltage IO = 20 A IO = 4.0 mA II input leakage current 74HC_HCT280 Product data sheet VI = VCC or GND; VCC = 5.5 V - 0 0.1 - 0.1 - 0.15 0.26 - 0.33 - 0.4 V - - 0.1 - 1.0 - 1.0 A All information provided in this document is subject to legal disclaimers. . Rev. 3 — 15 September 2016 5 of 15 © Nexperia B.V. 2017. All rights reserved 74HC280; 74HCT280 Nexperia 9-bit odd/even parity generator/checker Table 6. Static characteristics …continued At recommended operating conditions; voltages are referenced to GND (ground = 0 V). Symbol Parameter 25 C Conditions ICC supply current VI = VCC or GND; VCC = 5.5 V; IO = 0 A ICC additional per input pin; VI = VCC  2.1 V; supply current other inputs at VCC or GND; VCC = 4.5 V to 5.5 V; IO = 0 A In inputs CI input capacitance 40 C to +85 C 40 C to +125 C Unit Min Typ Max Min Max Min Max - - 8.0 - 80 - 160 A - 100 360 - 450 - 490 A - 3.5 - - - - - pF 10. Dynamic characteristics Table 7. Dynamic characteristics Voltages are referenced to GND (ground = 0 V); CL = 50 pF unless otherwise specified; for test circuit, see Figure 6. Symbol Parameter 25 C Conditions 40 C to +85 C 40 C to +125 C Unit Min Typ Max Min Max Min Max 74HC280 tpd [1] propagation In to PE; see Figure 5 delay VCC = 2.0 V - 55 200 - 250 - 300 ns VCC = 4.5 V - 20 40 - 50 - 60 ns VCC = 5.0 V; CL = 15 pF - 17 - - - - - ns VCC = 6.0 V - 16 34 - 43 - 51 ns VCC = 2.0 V - 63 200 - 250 - 300 ns VCC = 4.5 V - 23 40 - 50 - 60 ns VCC = 5.0 V; CL = 15 pF - 20 - - - - - ns - 18 34 - 43 - 51 ns VCC = 2.0 V - 19 75 - 95 - 110 ns VCC = 4.5 V - 7 15 - 19 - 22 ns - 6 13 - 16 - 19 ns - 65 - - - - - pF In to PO; see Figure 5 VCC = 6.0 V tt transition time [2] see Figure 5 VCC = 6.0 V CPD power per package; VI = GND to VCC dissipation capacitance 74HC_HCT280 Product data sheet [3] All information provided in this document is subject to legal disclaimers. . Rev. 3 — 15 September 2016 6 of 15 © Nexperia B.V. 2017. All rights reserved 74HC280; 74HCT280 Nexperia 9-bit odd/even parity generator/checker Table 7. Dynamic characteristics …continued Voltages are referenced to GND (ground = 0 V); CL = 50 pF unless otherwise specified; for test circuit, see Figure 6. Symbol Parameter 25 C Conditions 40 C to +85 C 40 C to +125 C Unit Min Typ Max Min Max Min Max - 21 42 - 53 - 63 ns - 18 - - - - - ns - 26 45 - 56 - 68 ns - 22 - - - - - ns - 7 15 - 19 - 22 ns - 65 - - - - - pF 74HCT280 [1] propagation In to PE; see Figure 5 delay VCC = 4.5 V tpd VCC = 5.0 V; CL = 15 pF In to PO; see Figure 5 VCC = 4.5 V VCC = 5.0 V; CL = 15 pF [2] tt transition time see Figure 5 CPD power per package; dissipation VI = GND to VCC  1.5 V capacitance VCC = 4.5 V [3] [1] tpd is the same as tPHL and tPLH. [2] tt is the same as tTHL and tTLH. [3] CPD is used to determine the dynamic power dissipation (PD in W): PD = CPD  VCC2  fi  N + (CL  VCC2  fo) where: fi = input frequency in MHz; fo = output frequency in MHz; CL = output load capacitance in pF; VCC = supply voltage in V; N = number of inputs switching; (CL  VCC2  fo) = sum of outputs. 11. Waveforms 9, ,QLQSXW 90 *1' 92+ W3+/ 90 9; 3(32RXWSXW 92/ W3/+ 9< W7+/ W7/+ DDD Measurement points are given in Table 8. VOL and VOH are typical voltage output levels that occur with the output load. Fig 5. Input (In) to output (PE, PO) propagation delays and output transition times 74HC_HCT280 Product data sheet All information provided in this document is subject to legal disclaimers. . Rev. 3 — 15 September 2016 7 of 15 © Nexperia B.V. 2017. All rights reserved 74HC280; 74HCT280 Nexperia 9-bit odd/even parity generator/checker Table 8. Measurement points Type Input Output VM VM VX VY 74HC280 0.5VCC 0.5VCC 0.1VCC 0.9VCC 74HCT280 1.3 V 1.3 V 0.1VCC 0.9VCC 9, W:  QHJDWLYH SXOVH 90 9 WI WU WU WI 9,  SRVLWLYH SXOVH 9 90  90 90  W: 9&& 9&& * 9, 92 5/ 6 RSHQ '87 &/ 57 DDG Test data is given in Table 9. Definitions test circuit: RT = Termination resistance should be equal to output impedance Zo of the pulse generator CL = Load capacitance including jig and probe capacitance RL = Load resistance. S1 = Test selection switch Fig 6. Test circuit for measuring switching times Table 9. Test data Type Input Load S1 position VI tr, tf CL RL tPHL, tPLH 74HC280 VCC 6 ns 15 pF, 50 pF 1 k open 74HCT280 3V 6 ns 15 pF, 50 pF 1 k open 74HC_HCT280 Product data sheet All information provided in this document is subject to legal disclaimers. . Rev. 3 — 15 September 2016 8 of 15 © Nexperia B.V. 2017. All rights reserved 74HC280; 74HCT280 Nexperia 9-bit odd/even parity generator/checker 12. Application information  ,  ,  ,  ,  ,  ,  ,  ,  ,  ,  ,  ,  , 3( 32    ,  ,  ,  ,  , 3(  32  DDD Fig 7. Cascaded 17-bit odd/even parity generator/checker 74HC_HCT280 Product data sheet All information provided in this document is subject to legal disclaimers. . Rev. 3 — 15 September 2016 9 of 15 © Nexperia B.V. 2017. All rights reserved 74HC280; 74HCT280 Nexperia 9-bit odd/even parity generator/checker 13. Package outline 62SODVWLFVPDOORXWOLQHSDFNDJHOHDGVERG\ZLGWKPP 627 ' ( $ ; F \ +( Y 0 $ =   4 $ $ $  $ SLQLQGH[ ș /S  /  H GHWDLO; Z 0 ES   PP VFDOH ',0(16,216LQFKGLPHQVLRQVDUHGHULYHGIURPWKHRULJLQDOPPGLPHQVLRQV 81,7 $ PD[ $ $ $ ES F ' ( H +( / /S 4 Y Z \ = PP                                                 LQFKHV        ș R R  1RWH 3ODVWLFRUPHWDOSURWUXVLRQVRIPPLQFKPD[LPXPSHUVLGHDUHQRWLQFOXGHG 5()(5(1&(6 287/,1( 9(56,21 ,(& -('(& 627 ( 06 Fig 8. -(,7$ (8523($1 352-(&7,21 ,668('$7(   Package outline SOT108-1 (SO14) 74HC_HCT280 Product data sheet All information provided in this document is subject to legal disclaimers. . Rev. 3 — 15 September 2016 10 of 15 © Nexperia B.V. 2017. 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Abbreviations Acronym Description CDM Charged Device Model CMOS Complementary Metal-Oxide Semiconductor DUT Device Under Test ESD ElectroStatic Discharge HBM Human Body Model MM Machine Model 15. Revision history Table 11. Revision history Document ID Release date Data sheet status Change notice Supersedes 74HC_HCT280 v.3 20160915 Product data sheet - 74HC_HCT280 v.2 Modifications: 74HC_HCT280 v.2 74HC_HCT280 Product data sheet • The format of this data sheet has been redesigned to comply with the new identity guidelines of NXP Semiconductors. • • Legal texts have been adapted to the new company name where appropriate. Type numbers 74HC280N, 74HCT280N removed. 19901201 Product specification - - All information provided in this document is subject to legal disclaimers. . Rev. 3 — 15 September 2016 12 of 15 © Nexperia B.V. 2017. All rights reserved 74HC280; 74HCT280 Nexperia 9-bit odd/even parity generator/checker 16. Legal information 16.1 Data sheet status Document status[1][2] Product status[3] Definition Objective [short] data sheet Development This document contains data from the objective specification for product development. Preliminary [short] data sheet Qualification This document contains data from the preliminary specification. Product [short] data sheet Production This document contains the product specification. [1] Please consult the most recently issued document before initiating or completing a design. [2] The term ‘short data sheet’ is explained in section “Definitions”. [3] The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status information is available on the Internet at URL http://www.nexperia.com. 16.2 Definitions Draft — The document is a draft version only. The content is still under internal review and subject to formal approval, which may result in modifications or additions. Nexperia does not give any representations or warranties as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information. Short data sheet — A short data sheet is an extract from a full data sheet with the same product type number(s) and title. A short data sheet is intended for quick reference only and should not be relied upon to contain detailed and full information. For detailed and full information see the relevant full data sheet, which is available on request via the local Nexperia sales office. In case of any inconsistency or conflict with the short data sheet, the full data sheet shall prevail. Product specification — The information and data provided in a Product data sheet shall define the specification of the product as agreed between Nexperia and its customer, unless Nexperia and customer have explicitly agreed otherwise in writing. In no event however, shall an agreement be valid in which the Nexperia product is deemed to offer functions and qualities beyond those described in the Product data sheet. 16.3 Disclaimers Limited warranty and liability — Information in this document is believed to be accurate and reliable. However, Nexperia does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. Nexperia takes no responsibility for the content in this document if provided by an information source outside of Nexperia. In no event shall Nexperia be liable for any indirect, incidental, punitive, special or consequential damages (including - without limitation - lost profits, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort (including negligence), warranty, breach of contract or any other legal theory. Notwithstanding any damages that customer might incur for any reason whatsoever, Nexperia's aggregate and cumulative liability towards customer for the products described herein shall be limited in accordance with the Terms and conditions of commercial sale of Nexperia. Right to make changes — Nexperia reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. This document supersedes and replaces all information supplied prior to the publication hereof. 74HC_HCT280 Product data sheet Suitability for use — Nexperia products are not designed, authorized or warranted to be suitable for use in life support, life-critical or safety-critical systems or equipment, nor in applications where failure or malfunction of a Nexperia product can reasonably be expected to result in personal injury, death or severe property or environmental damage. Nexperia and its suppliers accept no liability for inclusion and/or use of Nexperia products in such equipment or applications and therefore such inclusion and/or use is at the customer’s own risk. Applications — Applications that are described herein for any of these products are for illustrative purposes only. Nexperia makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Customers are responsible for the design and operation of their applications and products using Nexperia products, and Nexperia accepts no liability for any assistance with applications or customer product design. It is customer’s sole responsibility to determine whether the Nexperia product is suitable and fit for the customer’s applications and products planned, as well as for the planned application and use of customer’s third party customer(s). Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products. Nexperia does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer’s applications or products, or the application or use by customer’s third party customer(s). Customer is responsible for doing all necessary testing for the customer’s applications and products using Nexperia products in order to avoid a default of the applications and the products or of the application or use by customer’s third party customer(s). Nexperia does not accept any liability in this respect. Limiting values — Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) will cause permanent damage to the device. Limiting values are stress ratings only and (proper) operation of the device at these or any other conditions above those given in the Recommended operating conditions section (if present) or the Characteristics sections of this document is not warranted. Constant or repeated exposure to limiting values will permanently and irreversibly affect the quality and reliability of the device. Terms and conditions of commercial sale — Nexperia products are sold subject to the general terms and conditions of commercial sale, as published at http://www.nexperia.com/profile/terms, unless otherwise agreed in a valid written individual agreement. In case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. Nexperia hereby expressly objects to applying the customer’s general terms and conditions with regard to the purchase of Nexperia products by customer. No offer to sell or license — Nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication of any license under any copyrights, patents or other industrial or intellectual property rights. All information provided in this document is subject to legal disclaimers. . Rev. 3 — 15 September 2016 13 of 15 © Nexperia B.V. 2017. All rights reserved 74HC280; 74HCT280 Nexperia 9-bit odd/even parity generator/checker Export control — This document as well as the item(s) described herein may be subject to export control regulations. Export might require a prior authorization from competent authorities. Non-automotive qualified products — Unless this data sheet expressly states that this specific Nexperia product is automotive qualified, the product is not suitable for automotive use. It is neither qualified nor tested in accordance with automotive testing or application requirements. Nexperia accepts no liability for inclusion and/or use of non-automotive qualified products in automotive equipment or applications. In the event that customer uses the product for design-in and use in automotive applications to automotive specifications and standards, customer (a) shall use the product without Nexperia's warranty of the product for such automotive applications, use and specifications, and (b) whenever customer uses the product for automotive applications beyond Nexperia's specifications such use shall be solely at customer’s own risk, and (c) customer fully indemnifies Nexperia for any liability, damages or failed product claims resulting from customer design and use of the product for automotive applications beyond Nexperia's standard warranty and Nexperia's product specifications. Translations — A non-English (translated) version of a document is for reference only. The English version shall prevail in case of any discrepancy between the translated and English versions. 16.4 Trademarks Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. 17. Contact information For more information, please visit: http://www.nexperia.com For sales office addresses, please send an email to: salesaddresses@nexperia.com 74HC_HCT280 Product data sheet All information provided in this document is subject to legal disclaimers. . Rev. 3 — 15 September 2016 14 of 15 © Nexperia B.V. 2017. All rights reserved Nexperia 74HC280; 74HCT280 9-bit odd/even parity generator/checker 18. Contents 1 2 3 4 5 5.1 5.2 6 7 8 9 10 11 12 13 14 15 16 16.1 16.2 16.3 16.4 17 18 © General description . . . . . . . . . . . . . . . . . . . . . . 1 Features and benefits . . . . . . . . . . . . . . . . . . . . 1 Ordering information . . . . . . . . . . . . . . . . . . . . . 1 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2 Pinning information . . . . . . . . . . . . . . . . . . . . . . 3 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3 Functional description . . . . . . . . . . . . . . . . . . . 3 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 4 Recommended operating conditions. . . . . . . . 4 Static characteristics. . . . . . . . . . . . . . . . . . . . . 5 Dynamic characteristics . . . . . . . . . . . . . . . . . . 6 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Application information. . . . . . . . . . . . . . . . . . . 9 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 10 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Revision history . . . . . . . . . . . . . . . . . . . . . . . . 12 Legal information. . . . . . . . . . . . . . . . . . . . . . . 13 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 13 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Contact information. . . . . . . . . . . . . . . . . . . . . 14 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Nexperia B.V. 2017. All rights reserved For more information, please visit: http://www.nexperia.com For sales office addresses, please send an email to: salesaddresses@nexperia.com Date of release: 15 September 2016 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Nexperia: 74HC280D,652 74HC280D,653 74HC280N,652 74HCT280D,652 74HCT280DB,112 74HCT280DB,118 74HCT280D,653 74HCT280N,652