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| HD74AC244/HD74ACT244 Octal Buffer/Line Driver with 3-State Output Description The HD74AC244/HD74ACT244 is an octal buffer and line driver designed to be employed as a memory address driver, clock driver and bus-oriented transmitter/receive which provides improved PC board density. Features * 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers * Outputs Source/Sink 24 mA * HD74ACT244 has TTL-Compatible Inputs Pin Arrangement OE1 1 2 3 4 5 6 7 8 9 GND 10 (Top view) 20 VCC 19 OE2 18 17 16 15 14 13 12 11 HD74AC244/HD74ACT244 Truth Tables Inputs OE1 L L H D L H X Outputs (Pins 12, 14, 16, 18) L H Z Inputs OE2 L L H H L X Z : : : : High Voltage Level Low Voltage Level Immaterial High Impedance D L H X Outputs (Pins 3, 5, 7, 9) L H Z DC Characteristics (unless otherwise specified) Item Maximum quiescent supply current Maximum quiescent supply current Maximum additional ICC/input (HD74ACT244) 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 2 HD74AC244/HD74ACT244 AC Characteristics: HD74AC244 Ta = +25C CL = 50 pF Item Propagation delay Data to output Propagation delay Data to output Output enable time t PZH t PHL Symbol t PLH VCC (V)*1 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 Typ 6.5 5.0 6.5 5.0 6.0 5.0 7.5 5.5 7.0 6.5 7.5 6.5 Max 9.0 7.0 9.0 7.0 10.5 7.0 10.0 8.0 10.0 9.0 10.5 9.0 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 Max 10.0 7.5 10.0 7.5 11.0 8.0 11.0 8.5 10.5 9.5 11.5 9.5 ns ns ns ns ns Unit ns AC Characteristics: HD74ACT244 Ta = +25C CL = 50 pF Item Propagation delay Data to output Propagation delay Data to output Output enable time Output enable time Output disable time Output disable time Note: Symbol 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 Min 1.0 1.0 1.0 1.0 1.0 1.0 Typ 6.5 7.0 6.0 7.0 7.0 7.5 Max 9.0 9.0 8.5 9.5 9.5 10.0 Ta = -40C to +85C CL = 50 pF Min 1.0 1.0 1.0 1.0 1.0 1.0 Max 10.0 10.0 9.5 10.5 10.5 10.5 Unit ns ns ns ns ns ns 1. Voltage Range 5.0 is 5.0 V 0.5 V 3 HD74AC244/HD74ACT244 Capacitance Item Input capacitance Power dissipation capacitance Symbol CIN CPD Typ 4.5 45.0 Unit pF pF Condition VCC = 5.5 V VCC = 5.0 V 4 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. |
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