HD26C32A Quadruple Differential Line Receivers With 3 State Outputs ADE-205-575 (Z) 1st. Edition Dec. 2000 Description The HD26C32A provides differential line receivers which realize low power dissipation by CMOS process. The device has four receivers which meet the requirements of EIA standard RS-422A and RS-423A in a 16 pin package. The enable function is common to all four receivers and offers a choise of active high or active low inputs. Fail safe design ensures that if the inputs are open the outputs will always be high. Features • • • • • • • • • Low power dissipation with CMOS process Meets EIA standard RS-422A/423A Input sensitivity: ±0.2V (In the range of ±7 V of common mode input voltage) Propagation delay time: 19 ns typ Input hysteresis width: 60 mV typ Three state outputs Differential Inputs are includes fail safe circuit Power up and power down protection Pin to pin compatible with HD26LS32/32A HD26C32A Pin Arrangement IN A1 1 16 VCC IN A2 2 15 IN B1 OUT A 3 14 IN B2 Enable 4 13 OUT B OUT C 5 12 Enable IN C2 6 11 OUT D IN C1 7 10 IN D2 GND 8 9 IN D1 (Top view) Function Table Differential Input Enable Enable Outputs VID ≥ VTH or OPEN H X H X L H X X L H X X L L H VTL < VID < VTH VID ≥ VTH X H L Z X ? 2 : : : : : High level Low level High impedance Irrelevant Indeterminate ? L Z HD26C32A Absolute Maximum Ratings (Ta = 25°C) Item Symbol Ratings Unit VCC 7 V VCM ±14 V Differential Input Voltage* VDIFF ±14 V Enable Input Voltage VIN 7 V Output Current IO ±25 mA Storage Temperature Tstg –65 to +150 °C 2 Supply Voltage* Common Mode Input Voltage 3 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. All voltage values except for differential input voltage are with respect to network ground terminal. 3. Differential input voltage is measured at the noninverting input with respect to the corresponding inverting input. Recommended Operating Conditions (Ta = –40°C to +85°C) Item Symbol Min Typ Max Unit Supply Voltage VCC 4.5 5.0 5.5 V Common Mode Input Voltage VCM — — ±7 V Differential Input Voltage VDIFF — — ±7 V Output Current IO — — ±6 mA Operating Temperature Topr –40 — 85 °C Enable Input Rise / Fall Time t r, t f — — 500 ns Note: 1. This item guarantees maximum limit when one input switchies. Waveform: Refer to test circuit of switching characteristics. 3 HD26C32A Logic Diagram IN A2 + IN A1 – OUT A + IN B2 OUT B IN B1 – IN C2 + IN C1 – IN D2 + IN D1 – OUT C OUT D Enable G Enable G Electrical Characteristics (Ta = –40°C to +85°C, VCC = 5 V ± 10%) Item Symbol Min Typ Max Unit Conditions Diffrential Input VTH — — 0.2 V VCM = –7 to 7 V, VOUT ≥ 3.8 V Threshold Voltage VTL — — –0.2 V VCM = –7 to 7 V, VOUT ≤ 0.3 V Input Hysteresis VHYST — 60 — mV VCM = 0 V Enable Input VIH 2.0 — — V Voltage VIL — — 0.8 V Output Voltage VOH 3.8 4.2 — V VCC = 4.5 V, VDIEF = 1 V, IOUT = –6.0 mA VOL — 0.2 0.3 V VCC = 5.5 V, VDIEF = –1 V, IOUT = 6.0 mA I OZ — 0.5 5.0 µA Enable = 0.8 V, Enable = 2.0 V VOUT = VCC — –0.5 –5.0 µA Enable = 0.8 V, Enable = 2.0 V VOUT = GND 1.1 1.5 mA VIN = 10 V, Other Input = GND –0.1* — 0.6 mA VIN = 3 V, Other Input = GND 0 — –1.1 mA VIN = –3 V, Other Input = GND — –2.0 -2.5 mA VIN = –10 V, Other Input = GND — — 1.0 µA VI = VCC — — –1.0 µA VI = GND 5.8 6.8 10 kΩ VCM = –7 to 7 V (One Input AC GND) 16 23 mA VCC = 5.5 V, VDIEF = 1 V Output Leak CurrentI Input Current I IN — 1 Enable Input II Current Input Resistance RIN Supply Current I CC Note: 4 1. This specification is nonstandard of RS-422A. HD26C32A Switching Characteristics (Ta = –40°C to +85°C, VCC = 5 V ± 10%) Item Symbol Min Typ Max Unit Conditions Propagation Delay Time t PLH 7 16 25 ns CL = 50 pF, VDIEF = 2.5 V, VCM = 0 V t PHL 7 16 25 ns t RISE — 4 9 ns 4 9 ns 13 22 ns CL = 50 pF, RL = 1000 Ω 13 22 ns VDIEF = 2.5 V 13 22 ns CL = 50 pF, RL = 1000 Ω 13 22 ns VDIEF = 2.5 V Output Rise / Fall Time t FALL Output Disable Time t LZ — t HZ Output Enable Time t ZL t ZH — CL = 50 pF, VDIEF = 2.5 V, VCM = 0 V 5 HD26C32A 1. tPLH, tPHL, tRISE, tFALL Test Circuit Input + Pulse Generater Output – CL = 50 pF *1 *2 2V Wave forms 2.5 V Input + 0V 0V –2.5 V 2.5 V Input – 0V 0V –2.5 V t PLH t PHL 90 % Output 50 % 10 % tr 6 VOH 90 % 50 % 10 % tf VOL HD26C32A 2. tHZ, tZH Test Circuit + 2.5 V Output – CL = 50 pF RL = 1000 Ω Input *2 Pulse Generater *1 2V *3 Wave forms 3V Enable 1.3 V 1.3 V 0V 3V 1.3 V 1.3 V Enable 0V t ZH Output t HZ 50 % 0.5 V VOH VOL 7 HD26C32A 3. tLZ, tZL Test circuit VCC RL = 1000 Ω + –2.5 V Output – CL = 50 pF Input Pulse Generator 2V Wave forms 3V Enable 1.3 V 1.3 V 0V 3V 1.3 V 1.3 V Enable 0V t ZL t LZ VOH Output 50 % 0.5 V Notes: 1. 2. 3. 8 VOL The pulse generator has the following characteristics: PRR = 1 MHz, 50 % duty cycle, tr ≤ 6 ns, tf ≤ 6 ns, Zout = 50 Ω CL includes probe and jig capacitance. To test Enable input, ground Enable input and apply an inverted input waveform. HD26C32A HD26C32A Line Receiver Applications The HD26C32A is a line receiver that meets the EIA RS-422A and RS-423A conditions. It has a high inphase input voltage range, both positive and negative, enabling highly reliable transmission to be performed even in noisy environments. Its main features are listed below. • • • • • Operates on a single 5 V power supply. ±0.2 V input sensitivity in in-phase input voltage ±7 V range Three-state output On-chip input fail-safe circuit 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 input can be selected. Output Voltage VOUT (V) When exchange is carried out using a party line system, it is better to keep the receiver input bias current constituting the driver load small, as this allows more receivers to be connected. Output Voltage vs. Differential Input Voltage 6.0 Ta = 25°C VCC = 5 V 5.0 4.0 3.0 VCM = +7 V VCM = 0 V VCM = –7 V 2.0 1.0 0.0 –80 –40 0 40 80 Differential Input Voltage VDIFF (mV) Figure 1 Differential Input Voltage vs. Output Voltage Characteristics 9 HD26C32A Input Current vs. Input Voltage 2.0 Input Current IIN (mA) Ta = 25°C 1.2 C = V 0 VC 0.4 0.0 5 C = 5. V VC –0.4 –1.2 –2.0 –15 9 –3 0 3 9 Input Voltage VIN (V) 15 Figure 2 Input Voltage vs. Input Current Characteristics VCC R1 Driver R2 Receiver RT R1 R2 Differential Input Voltage vs. R1 0.4 50 = VCC Ω 0k = R2 R2 =3 0.5 kΩ 0k Ω 0.6 R2 Differential Input Voltage VDIEF (V) Figure 3 Method of Enhancing Fail-Safe Function 10 00 2=3 R1 kΩ R2 R R2 = 0.3 ∞ 100Ω Ta = 25°C VCC = 5 V 0.2 VDIFF R1 R2 0.1 0 5 10 15 R1 (kΩ) Figure 4 R 1, R2 vs. Differential Input Voltage 10 HD26C32A 1. Unidirectional Transmission (1 : 1 Configuration) Driver B Data Input D A Receiver F RT C Data Output E Figure 5 1 : 1 Unidirectional Transmission H : 5 µs/div V : 2 V/div Line : 1200 m, Duty : 50% Frequency : 100 kHz, RT : 100 Ω A D GND– GND– E B GND– GND– C F GND– GND– H : 50 ns/div V : 2 V/div Line : 12 m, Duty : 50% Frequency : 10 MHz, RT : 100 Ω A D GND– GND– E B GND– GND– C F GND– GND– Figure 6 Sample Transmission Waveforms 11 HD26C32A 2. Unidirectional Transmission (1 : n Configuration) Driver Data Input Receiver RT RT Data Output Enable Receiver Data Output Data Output Data Output Figure 7 1:n Unidirectional Transmission With this connection method, n receivers are connected for one driver. In the RS-422A standard, ten receivers can be connected simultaneously for one driver. Conversely, it is also possible to connect one receiver for n drivers. 3. Bidirectional Transmission Driver Data Input/ Output Receiver RT Data Input/ Output RT Enable Enable Receiver Driver Figure 8 Bidirectional Transmission When bidirectional data exchange is performed using a combination of the HD26C31 and HD26C32A, since either high or low output control is possible, using complementary enable inputs for the driver and receiver makes it easy to configure the kind of combination illustrated in figure 8. Extending this combination makes it possible to exchange n-bit data simultaneously, and handle a party line system. 12 HD26C32A Package Dimensions Unit: mm 19.20 20.00 Max 6.30 9 1 7.40 Max 16 8 1.3 0.48 ± 0.10 7.62 2.54 Min 5.06 Max 2.54 ± 0.25 0.51 Min 1.11 Max + 0.13 0.25 – 0.05 0° – 15° Hitachi Code JEDEC EIAJ Mass (reference value) DP-16 Conforms Conforms 1.07 g Unit: mm 10.06 10.5 Max 9 1 8 1.27 *0.42 ± 0.08 0.40 ± 0.06 0.10 ± 0.10 0.80 Max *0.22 ± 0.05 0.20 ± 0.04 2.20 Max 5.5 16 0.20 7.80 +– 0.30 1.15 0° – 8° 0.70 ± 0.20 0.15 0.12 M *Dimension including the plating thickness Base material dimension Hitachi Code JEDEC EIAJ Mass (reference value) FP-16DA — Conforms 0.24 g 13 HD26C32A 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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Whitebrook Park Lower Cookham Road Maidenhead Berkshire SL6 8YA, United Kingdom Tel: <44> (1628) 585000 Fax: <44> (1628) 585160 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 Copyright Hitachi, Ltd., 2000. All rights reserved. Printed in Japan. Colophon 2.0 14