HD74BC541A Octal Buffers/Line Drivers With 3 State Outputs ADE-205-023 (Z) Rev. 0 June 1993 Description The HD74BC541A provides high drivability and operation equal to or better than high speed bipolar standard logic IC by using Bi-CMOS process. The device features low power dissipation that is about 1/5 of high speed bipolar logic IC, when the frequency is 10 MHz. The device has eight inverter drivers with three state outputs in a 20 pin package. When G1 and G2 is low level, this drivers set up output is enable. Features • • • • Input/Output are at high impedance state when power supply is off. Built in input pull up circuit can make input pins be open, when not used. Input is TTL level. Wide operating temperature range Ta = –40 to +85°C Function Table Inputs G1 G2 A Output Y L L L L L L H H H X X Z X H X Z H L X Z : : : : High level Low level Immaterial High impedance HD74BC541A Pin Arrangement G1 1 20 VCC A1 2 19 G2 A2 3 18 Y1 A3 4 17 Y2 A4 5 16 Y3 A5 6 15 Y4 A6 7 14 Y5 A7 8 13 Y6 A8 9 12 Y7 GND 10 11 Y8 (Top view) Absolute Maximum Ratings Item Symbol Rating Unit Supply voltage VCC –0.5 to +7.0 V Input diode current I IK ±30 mA Input voltage VIN –0.5 to +7.5 V Output voltage VOUT –0.5 to +7.5 V Off state output voltage VOUT(off) –0.5 to +5.5 V Storage temperature Tstg –65 to +150 °C Note: 2 1. 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. HD74BC541A Recommended Operating Conditions Item Symbol Min Typ Max Unit Supply voltage VCC 4.5 5.0 5.5 V Input voltage VIN 0 — VCC V Ouput voltage VOUT 0 — VCC V Topr –40 — 85 °C t r , tf 0 — 8 ns/V Operating temperature 1 Input rise/fall time* Note: 1. This item guarantees maximum limit when one input switches. Waveform: Refer to test circuit of switching characteristics. Logic Diagram G1 G2 A1 Y1 A2 Y2 A3 Y3 A4 Y4 A5 Y5 A6 Y6 A7 Y7 A8 Y8 3 HD74BC541A Electrical Characteristics (Ta = –40 to +85°C) Item Symbol Input voltage VIH VCC(V) Min Max Unit 2.0 — V — 0.8 V 4.5 2.4 — V I OH = –3 mA 4.5 2.0 — V I OH = –15 mA 4.5 — 0.5 V I OL = 48 mA 4.5 — 0.55 V I OL = 64 mA IL V Output voltage VOH VOL Test Conditions Input diode voltage VIK 4.5 — –1.2 V I IN = –18 mA Input current II 5.5 — –250 µA VIN = 0 V 5.5 — 1.0 µA VIN = 5.5 V 5.5 — 100 µA VIN = 7.0 V 1 Short circuit output current* I OS 5.5 –100 –225 mA VIN = 0 or 5.5 V Off state output current I OZH 5.5 — 50 µA VO = 2.7 V I OZL 5.5 — –50 µA VO = 0.5 V I CCL 5.5 — 29.5 mA VIN = VCC or GND All outputs is “L” I CCH 5.5 — 0.5 mA VIN = VCC or GND All outputs is “H” I CCZ 5.5 — 2.5 mA VIN = VCC or GND All outputs is “Z” I CCT*2 5.5 — 1.5 mA VIN = 3.4V or 0.5V Supply current Notes: 1. Not more than one output should be shorted at a time and duration of the short circuit should not exceed one second. 2. When input by the TTL level, it shows I CC increase at per one input pin. 4 HD74BC541A Switching Characteristics (CL = 50 pF) Ta = 25°C VCC = 5.0 V Ta = –40 to +85°C VCC = 5.0 V ±10% Item Symbol Min Max Min Max Unit Test Conditions Propagation delay time t PLH 3.0 6.0 3.0 7.0 ns See under figure t PHL 3.0 6.0 3.0 7.0 t ZH 3.0 9.0 3.0 11.0 t ZL 3.0 9.0 3.0 11.0 t HZ 3.0 8.0 3.0 10.0 t LZ 3.0 8.0 3.0 10.0 Input capacitance CIN 3.0 (Typ) — pF VIN = VCC or GND Output capacitance CO 15.0 (Typ) — pF VO = VCC or GND Output enable time Output disable time ns ns Test circuit VCC VCC Input Pulse Generator Zout = 50Ω See Function Table G1 Output *3 A1 500Ω Y1 450Ω CL = 50 pF OPEN 7V 50Ω Scope G2 Notes: 1. 2. 3. CL includes probe and jig capacitance. A2-Y2 to A8-Y8 are identical to above load circuit. Open: tPLH, t PHL , t ZH , t HZ 7V: tZL, t LZ 5 HD74BC541A Waveforms-1 tr tf 90 % 1.5 V Input A 3V 90 % 1.5 V 10 % 10 % 0V t PHL t PLH VOH 1.5 V 1.5 V Output Y VOL Waveforms-2 tf tr 90 % 1.5 V 10 % Input G 3V 90 % 1.5 V 10 % t LZ t ZL 0V 3.5 V Waveform – A 1.5 V VOL + 0.3 V t ZH Waveform – B t HZ 1.5 V VOH – 0.3 V VOL VOH 0V Notes: 1. 2. 3. 4. 6 t r = 2.5 ns, tf = 2.5 ns Input waveforms: PRR = 1 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. HD74BC541A Package Dimensions Unit: mm 7 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. 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