 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| HD74AC373/HD74ACT373 Octal Transparent Latch with 3-State Output Description Diagram The HD74AC373/HD74ACT373 consists of eight latches with 3-state outputs from bus organized system applications. The flip-flops appear transparent to the data when Latch Enable (LE) is High. When LE is Low, the data that meets the setup time is latched. Data appears on the bus when the Output Enable (OE) is Low. When OE is High, the bus output is in the high impedance state. Features * * * * Eight Latches in a Single Package 3-State Outputs for Bus Interfacing Outputs Source/Sink 24 mA HD74AC373 has TTL-Compatible Inputs HD74AC373/HD74ACT373 Pin Arrangement OE 1 O0 2 D0 3 D1 4 O1 5 O2 6 D2 7 D3 8 O3 9 Gnd 10 (Top view) 20 VCC 19 O7 18 D7 17 D6 16 O6 15 O5 14 D5 13 D4 12 O4 11 LE Logic Symbol D0 D1 D2 D3 D4 D5 D6 D7 LE OE O0 O1 O2 O3 O4 O5 O6 O7 Pin Names D0 - D7 LE OE O0 - O7 Data Inputs Latch Enable Input Output Enable Input 3-State Latch Outputs 2 HD74AC373/HD74ACT373 Truth Table Inputs OE H L L L H L Z X O0 : : : : : LE X H H L Dn X L H X Outputs On Z L H O0 High Voltage Level Low Voltage Level High Impedance Immaterial Previous O 0 before Low-to-High Transition of Clock Functional Description The HD74AC373/HD74ACT373 contains eight D-type latches with 3-state standard outputs. When the Latch Enable (LE) input is High, data on the Dn inputs enters the latches. In this condition the latches are transparent, i.e., a latch output will change state each time its D input changes. When LE is Low, the latches store the information that was present on the D inputs setup time proceding the High-to-Low transition of LE. The 3-state standard outputs are controlled by the Output Enable (OE) input. When OE is Low, the standard outputs are in the 2-state mode. When OE is High, the standard outputs are in the high impedance mode but this does not interfere with entering new data into the latches. Logic Diagram D0 D1 D2 D3 D4 D5 D6 D7 D G LE O D G O D G O D G O D G O D G O D G O D G O OE O0 O1 O2 O3 O4 O5 O6 O7 Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. 3 HD74AC373/HD74ACT373 DC Characteristics (unless otherwise specified) Item Maximum quiescent supply current Maximum quiescent supply current Maximum ICC/input (HD74ACT373) Symbol I CC I CC I CCT Max 80 8.0 1.5 Unit A A mA Condition VIN = VCC or ground, VCC = 5.5 V, Ta = Worst case VIN = VCC or ground, VCC = 5.5 V, Ta = 25C VIN = VCC - 2.1 V, VCC = 5.5 V, Ta = Worst case AC Characteristics: HD74AC373 Ta = +25C CL = 50 pF Item Propagation delay Dn to O n Propagation delay Dn to O n Propagation delay LE to O n Propagation delay LE to O n Output enable time t PZH t PHL t PLH t PHL Symbol t PLH VCC (V)*1 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 Output enable time t PZL 3.3 5.0 Output disable time t PHZ 3.3 5.0 Output disable time t PLZ 3.3 5.0 Note: 1. Voltage Range 3.3 is 3.3 V 0.3 V Voltage Range 5.0 is 5.0 V 0.5 V Min 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Typ 10.0 7.0 9.5 7.0 10.0 7.5 9.5 7.0 9.0 7.0 8.5 6.5 10.0 8.0 8.0 6.5 Max 13.5 9.5 13.0 9.5 13.5 9.5 12.5 9.5 11.5 8.5 11.5 8.5 12.5 11.0 11.5 8.5 Ta = -40C to +85C CL = 50 pF Min 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Max 15.0 10.5 14.5 10.5 15.0 10.5 14.0 10.5 13.5 9.5 13.0 9.5 14.5 12.5 12.5 10.0 ns ns ns ns ns ns ns Unit ns 4 HD74AC373/HD74ACT373 AC Characteristics: HD74AC373 Ta = +25C CL = 50 pF Item Propagation delay Dn to O n Propagation delay Dn to O n Propagation delay LE to O n Propagation delay LE to O n Output enable time Output enable time Output disable time Output disable time Note: Symbol t PLH t PHL t PLH t PHL t PZH t PZL t PHZ t PLZ VCC (V)*1 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 Min 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Typ 8.5 8.0 8.5 8.0 8.0 7.5 9.0 7.5 Max 10.0 10.0 11.0 10.0 9.5 9.0 11.0 8.5 Ta = -40C to +85C CL = 50 pF Min 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Max 11.5 11.5 11.5 11.5 10.5 10.5 12.5 10.0 Unit ns ns ns ns ns ns ns ns 1. Voltage Range 5.0 is 5.0 V 0.5 V AC Operating Requirements: HD74AC373 Ta = +25C CL = 50 pF Item Setup time, HIGH or LOW Dn to LE Hold time, HIGH or LOW Dn to LE LE pulse width, HIGH tw th Symbol t su VCC (V)*1 Typ 3.3 5.0 3.3 5.0 3.3 5.0 Note: 1. Voltage Range 3.3 is 3.3 V 0.3 V Voltage Range 5.0 is 5.0 V 0.5 V 3.5 2.0 -3.0 -1.5 4.0 2.0 Ta = -40C to +85C CL = 50 pF Guaranteed Minimum 5.5 4.0 0.0 0.0 5.5 4.0 6.0 4.5 0.0 0.0 6.0 4.5 ns ns Unit ns 5 HD74AC373/HD74ACT373 AC Operating Requirements: HD74ACT373 Ta = +25C CL = 50 pF Item Setup time, HIGH or LOW Dn to LE Hold time, HIGH or LOW Dn to LE LE pulse width, HIGH Note: Symbol t su th tw VCC (V)*1 Typ 5.0 5.0 5.0 3.0 0.0 2.0 Ta = -40C to +85C CL = 50 pF Guaranteed Minimum 7.0 0.0 7.0 8.0 1.0 8.0 Unit ns ns ns 1. Voltage Range 5.0 is 5.0 V 0.5 V Capacitance Item Input capacitance Power dissipation capacitance Symbol CIN CPD Typ 4.5 40.0 Unit pF pF Condition VCC = 5.5 V VCC = 5.0 V 6 Unit: mm 24.50 25.40 Max 20 11 7.00 Max 6.30 1 0.89 1.27 Max 10 1.30 2.54 Min 5.08 Max 7.62 0.51 Min 2.54 0.25 0.48 0.10 0.25 - 0.05 0 - 15 + 0.11 Hitachi Code JEDEC EIAJ Weight (reference value) DP-20N -- Conforms 1.26 g Unit: mm 12.6 13 Max 20 11 1 10 5.5 0.80 Max 2.20 Max *0.22 0.05 0.20 0.04 0.20 7.80 + 0.30 - 1.15 0 - 8 0.70 0.20 1.27 *0.42 0.08 0.40 0.06 0.12 M *Dimension including the plating thickness Base material dimension 0.10 0.10 0.15 Hitachi Code JEDEC EIAJ Weight (reference value) FP-20DA -- Conforms 0.31 g Unit: mm 12.8 13.2 Max 20 11 7.50 1 0.935 Max 10 2.65 Max *0.27 0.05 0.25 0.04 0.25 10.40 + 0.40 - 1.45 0.20 0.10 0 - 8 0.57 0.70 + 0.30 - 1.27 *0.42 0.08 0.40 0.06 0.15 0.12 M Hitachi Code JEDEC EIAJ Weight (reference value) FP-20DB Conforms -- 0.52 g *Dimension including the plating thickness Base material dimension Unit: mm 6.50 6.80 Max 20 11 4.40 1 10 0.65 0.20 0.06 *0.22+0.08 -0.07 0.13 M 0.65 Max *0.17 0.05 0.15 0.04 1.10 Max 0.07 +0.03 -0.04 0 - 8 0.50 0.10 1.0 6.40 0.20 0.10 *Dimension including the plating thickness Base material dimension Hitachi Code JEDEC EIAJ Weight (reference value) TTP-20DA -- -- 0.07 g Cautions 1. Hitachi neither warrants nor grants licenses of any rights of Hitachi's or any third party's patent, copyright, trademark, or other intellectual property rights for information contained in this document. Hitachi bears no responsibility for problems that may arise with third party's rights, including intellectual property rights, in connection with use of the information contained in this document. 2. Products and product specifications may be subject to change without notice. Confirm that you have received the latest product standards or specifications before final design, purchase or use. 3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However, contact Hitachi's sales office before using the product in an application that demands especially high quality and reliability or where its failure or malfunction may directly threaten human life or cause risk of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation, traffic, safety equipment or medical equipment for life support. 4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly for maximum rating, operating supply voltage range, heat radiation characteristics, installation conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable failure rates or failure modes in semiconductor devices and employ systemic measures such as failsafes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other consequential damage due to operation of the Hitachi product. 5. This product is not designed to be radiation resistant. 6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without written approval from Hitachi. 7. Contact Hitachi's sales office for any questions regarding this document or Hitachi semiconductor products. Hitachi, Ltd. Semiconductor & Integrated Circuits. Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan Tel: Tokyo (03) 3270-2111 Fax: (03) 3270-5109 URL NorthAmerica : http:semiconductor.hitachi.com/ Europe : http://www.hitachi-eu.com/hel/ecg Asia (Singapore) : http://www.has.hitachi.com.sg/grp3/sicd/index.htm Asia (Taiwan) : http://www.hitachi.com.tw/E/Product/SICD_Frame.htm Asia (HongKong) : http://www.hitachi.com.hk/eng/bo/grp3/index.htm Japan : http://www.hitachi.co.jp/Sicd/indx.htm For further information write to: Hitachi Semiconductor (America) Inc. 179 East Tasman Drive, San Jose,CA 95134 Tel: <1> (408) 433-1990 Fax: <1>(408) 433-0223 Hitachi Europe GmbH Electronic components Group Dornacher Strae 3 D-85622 Feldkirchen, Munich Germany Tel: <49> (89) 9 9180-0 Fax: <49> (89) 9 29 30 00 Hitachi Europe Ltd. Electronic Components Group. Whitebrook Park Lower Cookham Road Maidenhead Berkshire SL6 8YA, United Kingdom Tel: <44> (1628) 585000 Fax: <44> (1628) 778322 Hitachi Asia Pte. Ltd. 16 Collyer Quay #20-00 Hitachi Tower Singapore 049318 Tel: 535-2100 Fax: 535-1533 Hitachi Asia Ltd. Taipei Branch Office 3F, Hung Kuo Building. No.167, Tun-Hwa North Road, Taipei (105) Tel: <886> (2) 2718-3666 Fax: <886> (2) 2718-8180 Hitachi Asia (Hong Kong) Ltd. Group III (Electronic Components) 7/F., North Tower, World Finance Centre, Harbour City, Canton Road, Tsim Sha Tsui, Kowloon, Hong Kong Tel: <852> (2) 735 9218 Fax: <852> (2) 730 0281 Telex: 40815 HITEC HX Copyright ' Hitachi, Ltd., 1999. All rights reserved. Printed in Japan. |
Price & Availability of HD74AC373
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |