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| HD74LVC245A Octal Bidirectional Transceivers with 3-state Outputs ADE-205-111B(Z) 3rd Edition December 1996 Description The HD74LVC245A has eight buffers with three state outputs in a 20 pin package. When (T / R) is high, data flows from the A inputs to the B outputs, and when (T / R) is low, data flows from the B inputs to the A outputs. A and B bus are separated by making enable input (OE) high level. Low voltage and high speed operation is suitable at the battery drive product (note type personal computer) and low power consumption extends the life of a battery for long time operation. Features * * * * * * VCC = 2.0 V to 5.5 V All inputs VIH (Max.) = 5.5 V (@VCC = 0 V to 5.5 V) All input outputs VI/O (Max.) = 5.5 V (@VCC = 0 V or output off state) Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25C) Typical VOH undershoot > 2.0 V (@VCC = 3.3 V, Ta = 25C) High output current 24 mA (@VCC = 3.0 V to 5.5 V) Function Table Inputs OE L L H H: L: X: Z: High level Low level Immaterial High impedance T/R L H X Operation B data to A bus A data to B bus Z HD74LVC245A Pin Arrangement T/R 1 A0 2 A1 3 A2 4 A3 5 A4 6 A5 7 A6 8 A7 9 GND 10 20 VCC 19 OE 18 B0 17 B1 16 B2 15 B3 14 B4 13 B5 12 B6 11 B7 (Top view) Absolute Maximum Ratings Item Supply voltage Input diode current Input voltage Output diode current Symbol VCC I IK VI I OK Ratings -0.5 to 6.0 -50 -0.5 to 6.0 -50 50 Input / output voltage VI/O -0.5 to VCC +0.5 -0.5 to 6.0 Output current VCC, GND current / pin Storage temperature IO I CC or IGND Tstg 50 100 -65 to 150 Unit V mA V mA mA V V mA mA C VI = -0.5 V T / R, OE VO = -0.5 V VO = VCC +0.5 V Output "H" or "L" Output "Z" or VCC:OFF Conditions Note: The absolute maximum ratings are values which must not individually be exceeded, and furthermore, no two of which may be realized at the same time. 2 HD74LVC245A Recommended Operating Conditions Item Supply voltage Symbol VCC Ratings 1.5 to 5.5 2.0 to 5.5 Input / output voltage VI VI/O 0 to 5.5 0 to V CC 0 to 5.5 Operating temperature Output current Ta I OH -40 to 85 -12 -24 I OL *1 *2 Unit V V V V V C mA mA mA mA ns/V Conditions Data retention At operation T / R, OE Output "H" or "L" Output "Z" or VCC:OFF VCC = 2.7 V VCC = 3.0 V to 5.5 V VCC = 2.7 V VCC = 3.0 V to 5.5 V 12 24 *2 Input rise / fall time t r, t f 10 Notes: 1. This item guarantees maximum limit when one input switches. Waveform : Refer to test circuit of switching characteristics. 2. duty cycle 50% 3 HD74LVC245A Electrical Characteristics Ta = -40 to 85C Item Input voltage Symbol VCC (V) VIH Min Max -- Unit V V V I OH = -100 A I OH = -12 mA Test Conditions 2.7 to 3.6 2.0 4.5 to 5.5 VCCx0.7 -- VIL 2.7 to 3.6 -- 4.5 to 5.5 -- Output voltage VOH 0.8 VCCx0.3 V V V V V V V V V V A A A A A A VIN = 5.5 V or GND VIN = VCC, GND VOUT = 5.5 V or GND VIN / V OUT = 5.5 V VIN / V OUT = 3.6 to 5.5 V VIN = VOUT or GND VIN = one input at (VCC -0.6)V, other inputs at V CC or GND I OL = 100 A I OL = 12 mA I OL = 24 mA I OH = -24 mA 2.7 to 5.5 VCC -0.2 -- 2.7 3.0 3.0 4.5 2.2 2.4 2.2 3.8 -- -- -- -- 0.2 0.4 0.55 0.55 5.0 5.0 20 10 10 500 VOL 2.7 to 5.5 -- 2.7 3.0 4.5 -- -- -- -- Input current Off state output current I IN I OZ I OFF 0 to 5.5 2.7 to 5.5 -- Output leak current 0 -- Quiescent supply current I CC I CC 2.7 to 3.6 -- 2.7 to 5.5 -- 3.0 to 3.6 -- 4 HD74LVC245A Switching Characteristics Ta = -40 to 85C Item Propagation delay time Symbol VCC (V) t PLH t PHL 2.7 3.30.3 5.00.5 Output enable time t ZH t ZL 2.7 3.30.3 5.00.5 Output disable time t ZH t LZ *1 Min -- 1.5 -- -- 1.5 -- -- 1.5 -- -- -- -- -- -- Typ -- -- -- -- -- -- -- -- -- -- -- -- 3.0 15.0 Max 8.0 7.0 5.5 9.5 8.5 7.0 8.5 7.5 6.5 -- 1.0 1.0 -- -- Unit ns ns ns ns ns ns ns ns ns ns ns ns pF pF From (Input) To (Output) A or B B or A OE A or B 2.7 3.30.3 5.00.5 OE A or B Between outut pins skew t OSLH t OSHL 2.7 3.30.3 5.00.5 Input capacitance Output capacitance Note: CIN CO 2.7 2.7 1. This parameter is characterized but not tested. tosLH = | tPLHm - tPLHn |, tosHL = | tPHLm - tPHLn| 5 HD74LVC245A Test Circuit VCC VCC OE See Function Table Input Pulse Generator Zout = 50 Output A0 B0 CL = 50 pF T/R S2 Vcc=2.7V, 3.30.3V Vcc=5.00.5V S1 500 450 50 Scope S2 OPEN See under table GND *1 Symbol t PLH / t PHL t ZH/ t HZ t ZL / t LZ Note: 1. CL includes probe and jig capacitance. OPEN GND 6V OPEN GND 2xVcc Waveforms - 1 tr 90 % Input Vref 10 % t PLH Vref 90 % Vref 10 % t PHL VOH In phase output Vref VOL tf VIH GND 6 HD74LVC245A Waveforms - 2 tf OE 90 % Vref 10 % t ZL Waveform - A t ZH Waveform - B Vref Vref t HZ VOH - 0.3 V tr 90 % Vref 10 % t LZ VIH GND V OH1 VOL + 0.3 V VOL VOH V OL1 TEST VIH Vref VOH1 VOL1 Notes: 1. 2. 3. 4. Vcc=2.7V, 3.30.3V Vcc=5.00.5V 2.7 V 1.5 V 3V GND Vcc 50%Vcc Vcc GND tr = 2.5 ns, tf = 2.5 ns Input waveform : PRR = 10 MHz, duty cycle 50% Waveform - A shows input conditions such that the output is "L" level when enable by the output control. Waveform - B shows input conditions such that the output is "H" level when enable by the output control. 7 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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