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| HD26C31 Quadruple Differential Line Drivers With 3 State Outputs ADE-205-574 (Z) 1st. Edition Dec. 2000 Description The HD26C31 features quadruple differential line drivers which satisfy the requirements of EIA standard RS-422A. This device is designed to provide differential signals with high current capability on bus lines. The circuit provides enable input to control all four drivers. The output circuit has active pull up and pull down and is capable of sinking or sourcing 20 mA. Features * * * * * * * * * * TTL input compatibility Propagation delay time: 6 ns typ Output to output skew: 0.5 ns typ High output impedance in power off conditions Meets EIA standard RS-422A Operates from a single 5 V supply Three state outputs Low power dissipation with CMOS process Power up and power down protection Pin to pin compatible with HD26LS31 HD26C31 Pin Arrangement 1A 1 1Y 2 1Z 3 Enable G 4 2Z 5 2Y 6 2A 7 GND 8 16 VCC 15 4A 14 4Y 13 4Z 12 Enable G 11 3Z 10 3Y 9 3A (Top view) Function Table Input A H L H L X H L X Z : : : : Enables G H H X X L High level Low level Irrelevant High impedance G X X L L H Outputs Y H L H L Z Z L H L H Z 2 HD26C31 Absolute Maximum Ratings (Ta = 25C) Item Supply Voltage* Input Voltage Output Voltage Power Dissipation Storage Temperature Range Lead Temperature* Output Current Supply Current 3 2 Symbol VCC VIN VOUT PT Tstg Tlead I OUT I CC Ratings -0.5 to 7.0 -1.5 to VCC +1.5 -0.5 to VCC +0.5 500 -65 to 150 260 150 150 Unit V V V mW C C mA mA Notes: 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. 2. The values is defined as of ground terminal. 3. The values at 1.6 mm away from the package within 10 second, when soldering. Recommended Operating Conditions (Ta = -40C to +85C) Item Supply Voltage Input Voltage Output Voltage Operating Temperature Input Rise/Fall Time* Note: 1 Symbol VCC VIN VOUT Ta t r, t f Min 4.5 0 0 -40 -- Typ 5.0 -- -- 25 -- Max 5.5 VCC VCC 85 500 Unit V V V C ns 1. This guarantees maximum limit when one input switches. 3 HD26C31 Logic Diagram 1Y 1Z 2Y 2Z 3A 3Y 3Z 4A Enable G Enable G 4Y 4Z 1A 2A 4 HD26C31 Electrical Characteristics (Ta = -40C to +85C) Item Input Voltage Symbol VIH VIL Output Voltage VOH VOL Differential Output Voltage VT Min 2.0 -- 2.4 -- 2.0 Typ -- -- 3.4 0.2 3.1 Max -- 0.8 -- 0.4 -- Unit V V V V V VIN = VIH or VIL, IOH = -20 mA VIN =VIH or VIL, I OL = 20 mA RL = 100 VT 50 50 VOS Conditions Difference In Differential Output Common ModeOutput Voltage Difference In Output Common Mode Input Current Supply Current IV TI - IVTI VOS -- -- -- 1.8 -- -- 200 0.8 0.5 -- -- -- 0.4 3.0 0.4 1.0 500 2.0 5.0 V V V A A mA A A VIN = VCC, GND, VIH or VIL I OUT = 0 A, VIN = VCC or GND I OUT =0 A, VIN = 2.4 V or 0.5 V VOUT = VCC or GND, G = VIL, G = VIH VIN = VCC or GND VCC = 0 V, VOUT = 6 V VCC = 0 V, VOUT = -0.25 V IV OS - VOSI -- I IN I CC I CC* 2 -- -- -- -- 3 Off State Output Current I OZ Short Circuit Output Current I SC* Output Current with Power I OFF Off I OFF -30 -- -- -150 mA 100 -100 A Notes: 1. All typical values are at VCC = Ta = 25C. 2. 1 input: V IN = 2.4 V or 0.5 V, other inputs: VIN = VCC or GND 3. Not more than one output should be shorted at a time and duration of the short circuit should not exceed one second. 5 HD26C31 Switching Characteristics (Ta = -40C to +85C, VCC = 5 V 10%) Item Propagation Delay Time Symbol t PLH t PHL Output To Output Skew Differential Output Transition Time Skew t TLH t THL Output Enable Time t ZL t ZH Output Disable Time t LZ t HZ Power Dissipation Capacitance Input Capacitance CPD CIN -- -- -- -- -- Min 2.0 2.0 -- Typ 6.0 6.0 0.5 6.0 6.0 11.0 13.0 5.0 7.0 50.0 6.0 Max 11.0 11.0 2.0 10.0 10.0 19.0 21.0 9.0 11.0 -- -- Unit ns ns ns ns ns ns ns ns ns pF pF Test Circuit (2) Test Circuit (3) Conditions Test Circuit (1) Test Circuit 1 VCC Input Y C1 Z VCC G Output G C3 Output C2 R1 R3 1.5 V S1 OPEN R2 Palse Generator Zout = 50 A Note: 1. C1, C2 and C3 (40 pF) include probe and jig capacitance. R1 = R2 = 50 , R3 = 500 6 HD26C31 Waveforms 1 tr Input A 10 % t PLH Output Y 90 % 1.3 V 90 % 1.3 V 10 % t PHL VOH 1.3 V 1.3 V VOL t PHL t PLH VOH Output Z 1.3 V 1.3 V VOL VOH Output Y 50 % 50 % VOL Skew Skew VOH Output Z Notes: 1. 2. 50 % t r 6 ns, tf 6 ns Input waveforms: PRR = 1 MHz, duty cycle 50% 50 % VOL tf 3V 0V 7 HD26C31 Test Circuit 2 VCC VCC Output A Input R1 R3 1.5 V S1 CLOSED R2 Y C1 Z C2 C3 Output Pulse Generater Zout = 50 G G Notes: 1. 2. t r 6 ns, tf 6 ns Input waveforms: PRR = 1 MHz, duty cycle 50% Waveforms 2 tr Enable G 10 % t LZ Output Y 90 % 1.3 V 90 % 1.3 V 10 % t ZL 1.5 V VOL + 0.3 V 0.8 V VOL t HZ t ZH VOH Output Z VOH - 0.3 V t f 6 ns, tf 6 ns Input waveforms: PRR = 1 MHz, duty cycle 50% 2.0 V 1.5 V Notes: 1. 2. tf 3V 0V Enable G 8 HD26C31 Test Circuit 3 Input R1 R3 1.5 V S1 OPEN R2 Pulse Generator Zout = 50 VCC G G A Y Output Z C1 C2 C3 Ach Bch Oscilloscope Bch Invert Ach Add Bch Note: 1. C1, C2 and C3 (40 pF) include probe and jig capacitance. R1 = R2 = 50 , R3 = 500 Waveforms 3 tr Input A 10 % 90 % 90 % 10 % tf 3V 0V 90 % 90 % Output (Differential) 10 % t TLH t THL 10 % Notes: 1. 2. t r 6 ns, tf 6 ns Input waveforms: PRR = 1 MHz, duty cycle 50% 9 HD26C31 HD26C31 Line Driver Applications The HD26C31 is a line driver that meets the EIA RS-422A conditions, and has been designed to supply a high current for differential signals to a bus line. Its features are listed below. * * * * Operates on a single 5 V power supply. High output impedance when power is off Sink current and source current both 20 mA On-chip power up/down protection circuit As shown by the logic diagram, the enable function is common to all four drivers, and either active-high or active-low can be selected. The output section consists of two output stages (the Y side and Z side), each of which has the same sink current and source current capacity. Connection of a termination resistance when the HD26C31 is used as a balanced differential type driver is shown. Output Characteristics ("H" Level) 5.0 Ta = 25C Output Voltage VOH (V) 4.0 VCC = 5.5 V VCC = 5.0 V 3.0 2.0 1.0 VCC = 4.5 V 0 -20 -40 -60 -80 Output Current IOH (mA) -100 Figure 1 IOH vs. VOH Characteristics 10 HD26C31 Output Characteristics ("L" Level) 0.5 Ta = 25C VCC = 4.5 V VCC = 5.0 V VCC = 5.5 V Output Voltage VOL (V) 0.4 0.3 0.2 0.1 0 20 40 60 80 Output Current IOL (mA) 100 Figure 2 IOL vs. V OL Characteristics When termination resistance R T is connected between the two transmission lines, as shown in figure 3 the current path situation is that current IOH on the side outputting a high level (in this case, the Y output) flows to the side outputting a low level (in this case, the Z output) via RT , with the result that the low level rise is large. If termination resistance RT is dropped to GND on both transmit lines, as shown in figure 4 the current path situation is that the current that flows into the side outputting a low level (in this case, the Z output) is only the input bias current from the receiver. As this input bias current is small compared with the signal current, it has almost no effect on the differential input signal at the receiver end. Figure 5 shows the output voltage characteristic when termination resistance RT is varied. Also, when used in a party line system, etc., the low level rises further due to the receiver input bias current, so that it is probably advisable to drop the termination resistance to GND. However, the fact that it is possible to make the value of R T equal to the characteristic impedance of the transmission line offers the advantage of being able to hold the power dissipation on the side outputting a high level to a lower level than in the above case. Consequently, the appropriate use must be decided according to the actual operating conditions (transmission line characteristics, transmission distance, whether a party line is used, etc.). Figure 6 shows the output characteristics when termination resistance RT is varied. 11 HD26C31 Y "H" IOH RT "L" Z IOL IIN (Receiver) Figure 3 Example of Driver Use-1 IOH RT "L" Z RT IIN (Receiver) Y "H" Figure 4 Example of Driver Use-2 Output Voltage vs. Termination Resistance Output Voltage VOH(Y), VOL(Z) (V) 10 VOH(Y) 1 Y RT 0.1 "H" RT Z VOL(Z) 50 100 200 500 1k 2k 5k 10k 20k 50k Termination Resistance RT () VOL VOH GND 0.01 0.001 10 20 Figure 5 Termination Resistance vs. Output Voltage Characteristics A feature of termination implemented as shown in figure 7 is that power dissipation is low when the duty of the transmitted signal is high. However, care is required, since if R T is sufficiently small, when the output on the pulled-up side goes high, a large current will flow and the output low level will rise. Figure 8 shows the output characteristics when termination resistance RT is varied. 12 HD26C31 Output Voltage vs. Termination Resistance Output Voltage VOH(Y), VOL(Z) (V) 10 VOH(Y) 1 Y VCC = 5 V Ta = 25C RT VOH Z GND VOL 0.1 "H" VOL(Z) 0.01 0.001 10 20 50 100 200 500 1k 2k 5k 10k 20k 50k Termination Resistance RT () Figure 6 Termination Resistance vs. Output Voltage Characteristics VCC Y Data input RT Z RT Figure 7 Example of Driver Use-3 Output Voltage vs. Termination Resistance Output Voltage VOH(Z), VOL(Y) (V) 10 VOH(Z) 1 Y RT VCC = 5 V Ta = 25C 0.1 VOL(Y) "L" VOL Z RT GND VOH 0.01 0.001 10 20 50 100 200 500 1k 2k 5k 10k 20k 50k Termination Resistance RT () Figure 8 Termination Resistance vs. Output Voltage Characteristics 13 HD26C31 Package Dimensions Unit: mm 19.20 20.00 Max 16 9 1 1.3 1.11 Max 8 7.40 Max 6.30 0.51 Min 2.54 Min 5.06 Max 7.62 2.54 0.25 0.48 0.10 0.25 - 0.05 0 - 15 Hitachi Code JEDEC EIAJ Mass (reference value) + 0.13 DP-16 Conforms Conforms 1.07 g Unit: mm 10.06 10.5 Max 16 9 1 *0.22 0.05 0.20 0.04 8 0.80 Max 5.5 0.20 7.80 + 0.30 - 2.20 Max 1.15 0 - 8 0.70 0.20 1.27 *0.42 0.08 0.40 0.06 0.12 M Hitachi Code JEDEC EIAJ Mass (reference value) FP-16DA -- Conforms 0.24 g *Dimension including the plating thickness Base material dimension 14 0.10 0.10 0.15 HD26C31 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 Europe Asia Japan : : : : http://semiconductor.hitachi.com/ http://www.hitachi-eu.com/hel/ecg http://sicapac.hitachi-asia.com http://www.hitachi.co.jp/Sicd/indx.htm Hitachi Asia Ltd. Hitachi Tower 16 Collyer Quay #20-00, Singapore 049318 Tel : <65>-538-6533/538-8577 Fax : <65>-538-6933/538-3877 URL : http://www.hitachi.com.sg Hitachi Asia Ltd. (Taipei Branch Office) 4/F, No. 167, Tun Hwa North Road, Hung-Kuo Building, Taipei (105), Taiwan Tel : <886>-(2)-2718-3666 Fax : <886>-(2)-2718-8180 Telex : 23222 HAS-TP URL : http://www.hitachi.com.tw 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 URL : http://www.hitachi.com.hk 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) 585160 Copyright (c) Hitachi, Ltd., 2000. All rights reserved. Printed in Japan. Colophon 2.0 15 |
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