UNISONIC TECHNOLOGIES CO., LTD UTRS3080 Preliminary CMOS IC FAIL-SAFE, 115KBPS, RS-485 / RS-422 TRANSCEIVERS WITH DESCRIPTION SOP-14 The UTC UTRS3080 high-speed transceivers for RS-485/RS-422 communication contain one driver and one receiver. The device features fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are open or shorted. This means that the receiver output will be logic high if all transmitters on a terminated bus are disabled (high impedance). The UTC UTRS3080 features reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission up to 115kbps. The transceiver typically draws 375µA of supply current when unloaded or when fully loaded with the drivers disabled. A device has a 1/8-unit-load receiver input impedance that allows up to 256 transceivers on the bus. SOP-8 FEATURES * True fail-safe receiver while maintaining EIA/TIA-485 compatibility * Enhanced slew-rate limiting facilitates Error-Free data transmission * 5.0V single power supply * 1µA low-current shutdown mode * Allow up to 256 transceivers on the Bus * Driver short circuit current limit * Thermal shutdown for overload protection ORDERING INFORMATION Ordering Number UTRS3080G-S08-R UTRS3080G-S14-R www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd Package SOP-8 SOP-14 Packing Tape Reel Tape Reel 1 of 9 QW-R113-017.a UTRS3080 Preliminary CMOS IC MARKING SOP-8 SOP-14 PIN CONFIGURATION RO 1 8 VCC RE 2 7 B DE 3 6 A DI 4 5 GND N.C. 1 14 VCC RO 2 13 N.C. RE 3 12 A DE 4 11 B DI 5 10 Z GND 6 9 Y GND 7 8 N.C. SOP-8 SOP-14 PIN DESCRIPTION PIN NO. 1, 8, 13 PIN NAME N.C. 2 RO 3 RE 4 DE 5 DI 6, 7 9 10 11 12 14 GND Y Z B A VCC DESCRIPTION Not connected. Not internally connected. Receiver output. When RE is low and if A-B≥-50mV, RO will be high; if A-B≤ -500mV, RO will be low. Receiver output enable. Drive RE low to enable RO; RO is high impedance when RE is high. Drive RE high and DE low to enter low-power shutdown mode. Driver output enable. Drive DE high to enable driver outputs. These outputs are high impedance when DE is low. Drive RE high and DE low to enter low-power shutdown mode. Driver input. With DE high, a low on DI forces non-inverting output low and inverting output high. Similarly, a high on DI forces non-inverting output high and inverting output low. Ground Non-inverting driver output Inverting driver output Inverting receiver input Non-inverting receiver input Positive supply; 4.75V≤VCC≤5.25V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 9 QW-R113-017.a UTRS3080 Preliminary CMOS IC BLOCK DIAGRAM RD 1 8 VCC R 14 VCC N.C. 1 RO 2 RE DE 2 7 3 6 B A DI 4 5 GND SOP-8 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 13 N.C. RE 3 12 A DE 4 11 B DI 5 GND 6 D R 10 Z D GND 7 9 Y 8 N.C. SSOP-14 3 of 9 QW-R113-017.a UTRS3080 Preliminary CMOS IC ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL VCC Supply Voltage Control Input Voltage ( RE , DE) Driver Input Voltage Driver Output Voltage (A, B, Y, Z) Receiver Input Voltage (A, B) Receiver Input Voltage, Full Duplex (A, B) Receiver Output Voltage (RO) Continuous Power Dissipation (Derate 8.33mW/°C above +70°C) RATINGS +7.0 UNIT V -0.3~(VCC+0.3) V -0.3~(VCC+0.3) V ±13 V ±13 V ±25 V -0.3~(VCC+0.3) V SOP-8 471 mW PD 667 mW SOP-14 Lead Temperature (Soldering, 10s) TL +300 °C Operating Temperature Ranges TOPR -40~+85 °C Storage Temperature Range TSTG -65~+150 °C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. DI DC ELECTRICAL CHARACTERISTICS (VCC=+5.0V ±5%, TA=TMIN to TMAX, unless otherwise noted. Typical values are at VCC=+5.0V and TA=+25°C) (Note 1) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT DRIVER Differential Driver Output VOD1 RT=10kΩ 5.0 V (No Load) Fig.1, R=50Ω (RS-422) 1.6 V Differential Driver Output VOD2 Fig.1, R=27Ω (RS-485) 1.0 V Change in Magnitude of Differential Output Voltage ∆VOD Fig.1, R=50Ω or R=27Ω 0.2 V (Note 2) Driver Common-Mode Output VOC Fig.1, R=50Ω or R=27Ω 3 V Voltage Change In Magnitude of Common-Mode Voltage ∆VOC Fig.1, R=50Ω or R=27Ω 0.2 V (Note 2) Input High Voltage VIH1 DE, DI, RE Input Low Voltage VIL1 DI Input Hysteresis VHYS DE, DI, RE SRL=VCC or Unconnected SRL Input Current IIN1 Input Current (A and B) Full Duplex IIN4 Output Leakage (Y and Z) Full Duplex IO Driver Short-Circuit Output Current (Note 4) VOD1 V 0.8 100 V mV DE, DI, RE ±2 µA VIN=12V VIN=-7V VIN=12V DE=GND, VCC=GND or 5.25V VIN=-7V -7V≤VOUT≤VCC 0V≤VOUT≤12V 0V≤VOUT≤VCC 125 -75 125 µA µA µA µA mA mA mA DE=GND, VCC=GND or 5.25V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2.0 -100 -250 250 ±25 4 of 9 QW-R113-017.a UTRS3080 Preliminary CMOS IC DC ELECTRICAL CHARACTERISTICS (Cont.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT RECEIVER Receiver Differential Threshold VTH -7V≤VCM≤+12V -500 -125 50 mV Voltage Receiver Input Hysteresis ∆VTH 25 mV Receiver Output High Voltage VOH IO=-4mA, VID=-50mV VCC-1.5 V Receiver Output Low Voltage VOL IO=4mA, VID=-500mV 0.4 V Three-State Output Current at IOZR 0.4V≤VO≤ 2.4V ±1 µA Receiver Receiver Input Resistance RIN -7V≤VCM≤+12V 96 kΩ Receiver Output Short-Circuit IOSR 0V≤VRO≤VCC ±7 ±95 mA Current SUPPLY CURRENT No Load, DE=VCC 430 900 µA DE=GND 375 600 µA RE =DI=GND or VCC Supply Current ICC No Load, DE=VCC 475 1000 µA DE=GND 420 800 µA RE =DI=GND or VCC Supply Current in Shutdown ISHDN DE=GND, VRE =VCC 1 10 µA Mode Notes: 1. All currents into the device are positive; all currents out of the device are negative. All voltages are referred to device ground unless otherwise noted 2. ∆VOD and ∆VOC are the changes in VOD and VOC, respectively, when the DI input changes state 3. The SRL pin is internally biased to VCC/ 2 by a 100kΩ/100kΩ resistor divider. It is guaranteed to be VCC/ 2 if left unconnected 4. Maximum current level applies to peak current just prior to foldback-current limiting; minimum current level applies during current limiting UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 9 QW-R113-017.a UTRS3080 Preliminary CMOS IC SWITCHING CHARACTERISTICS (VCC=+5.0V ±5%, TA=TMIN to TMAX, unless otherwise noted. Typical values are at VCC=+5.0V and TA=+25°C) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX tDPLH 2030 2600 Driver Input to Output Fig.3 and 5, RDIFF=54Ω, CL1=CL2=100pF tDPHL 2030 2600 Driver Output Skew -3 ±200 tDSKEW Fig.3 and 5, RDIFF=54Ω, CL1=CL2=100pF | tDPLH - tDPHL | Driver Rise or Fall Time tDR, tDF Fig.3 and 5, RDIFF=54Ω, CL1=CL2=100pF 1320 2500 Maximum Data Rate fMAX 115 Driver Enable to Output High tDZH Fig.4 and 6, CL=100pF, S2 Closed 3500 Driver Enable to Output Low tDZL Fig.4 and 6, CL=100pF, S1 Closed 3500 Driver Disable Time from Low tDLZ Fig.4 and 6, CL=15pF, S1 Closed 100 Driver Disable Time from High tDHZ Fig.4 and 6, CL=15pF, S2 Closed 100 tRPLH, Fig.7 and 9, |VID|≥2.0V; Rise and Fall Time Receiver Input to Output 200 400 tRPHL of VID≤15ns |tRPLH - tRPHL| Differential Fig.7 and 9, |VID|≥2.0V; Rise and Fall Time 3 100 tRSKD Receiver Skew of VID≤15ns Receiver Enable to Output Low tRZL Fig.2 and 8, CL=100pF, S1 Closed 20 100 Receiver Enable to Output High tRZH Fig.2 and 8, CL=100pF, S2 Closed 20 100 Receiver Disable Time from Low tRLZ Fig.2 and 8, CL=100pF, S1 Closed 20 300 Receiver Disable Time from Fig.2 and 8, CL=100pF, S2 Closed 20 300 tRHZ High Time to Shutdown tSHDN Note 1 50 200 600 Driver Enable from Shutdown to 6000 tDZH(SHDN) Fig. 4 and 6, CL=15pF, S2 Closed Output High Driver Enable from Shutdown to 6000 tDZL(SHDN) Fig.4 and 6, CL=15pF, S1 Closed Output Low Receiver Enable from Shutdown 3500 tRZH(SHDN) Fig.4 and 6, CL=100pF, S2 Closed to Output High Receiver Enable from Shutdown 3500 tRZL(SHDN) Fig. 4 and 6, CL=100pF, S1 Closed to Output Low UNIT ns ns ns ns kbps ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns Note: The device is put into shutdown by bringing RE high and DE low. If the enable inputs are in this state for less than 50ns, the device is guaranteed not to enter shutdown. If the enable inputs are in this state for at least 600ns, the device is guaranteed to have entered shutdown UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 9 QW-R113-017.a UTRS3080 Preliminary CMOS IC FUNCTION TABLE Table 1 TRANSMITTING INPUTS RE X X 0 1 OUTPUTS DE DI Z Y 1 1 0 0 1 0 X X 0 1 High-Z 1 0 High-Z Shutdown Table 2 RECEIVING INPUTS DE A-B RE 0 X ≥-0.05V 0 X ≤-0.5V 0 X Open/Shorted 1 1 X 1 0 X X = Don’t care Shutdown mode, driver and receiver outputs high impedance UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw OUTPUT RO 1 0 1 High-Z Shutdown 7 of 9 QW-R113-017.a UTRS3080 Preliminary CMOS IC TEST CIRCUIT Y TEST POINT RECEIVER OUTPUT R CRL VOD + 15pF VOC R 1KΩ VCC S1 1KΩ S2 Z Fig. 2 Receiver Enable/Disable Timing Test Load Fig. 1 Driver DC Test Circuit 3V DE DI Y CL1 VID OUTPUT UNDER TEST VCC S1 CL RDIFF + 500Ω Z CL2 S2 Fig. 3 Driver Timing Test Circuit VOH RO Fig. 4 Driver Enable/Disable Timing Test Load 1.5V 1.5V RE 1.5V 1.5V tZL(SHDN), tZL tLZ VCC tPHL A B Fig. 7 Receiver Propagation Delays UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw RO 1.5V OUTPUT NORMALLY LOW RO 1.5V tPLH Input -1V 0V Output VOL 1V 3V VOL+0.5V OUTPUT NORMALLY HIGH 0 tZH(SHDN), tZH VOH-0.5V tHZ Fig. 8 Receiver Enable and Disable Times 8 of 9 QW-R113-017.a UTRS3080 Preliminary TEST CIRCUIT (Cont.) TYPICAL APPLICATION CIRCUIT DE VCC 4 VCC RE 0.1µF 14 9 DI 5 CMOS IC D Y Rt 10 RO R Z 12 A RO 2 R Rt D 11 DI B NC 1,8,13 3 6,7 GND RE GND DE UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 9 of 9 QW-R113-017.a