UNISONIC TECHNOLOGIES CO., LTD UTRS3088 Preliminary CMOS IC FAIL-SAFE, 1.0MBPS, RS-485 / RS-422 TRANSCEIVERS WITH ±15KV ESD-PROTECTED DESCRIPTION The UTC UTRS3088 is a half-duplex transceiver designed for RS-485 data bus network, which contains one transmitter and one receiver. The UTC UTRS3088 features a fail-safe receiver, which guarantees the receiver to output high when the receiver inputs are open, short or idle. The UTC UTRS3088 also features a hot-swap glitch free protection circuits which guarantee outputs of both the transmitter and the receiver in a high impedance state during the power up period. So that the large short current from power to ground will be disable by glitch free function, which will save the power and enhance the efficiency of the power up. The UTC UTRS3088 is optimized for signal rates up to 1.0Mbps with differential voltage of 2.3V. The UTC UTRS3088 also has the thermal shutdown function when the temperature is over 150℃ and the protection of the current limitation in the transmitter to protect the itself from the damage by the system-fault conditions during normal operation. FEATURES * Meet the requirements of the EIA/TIA-485 standards. * 5.0V single power supply. * 1µA low-current shutdown mode. * HBM ±15kV ESD protection. * True fail-safe receiver while maintaining EIA/TIA-485 compatibility. * Hot-Swap glitch free protection on control inputs. * Up to 256 transceivers on the bus. * Maximum baud rate up to 1.0Mbps. * Transmitter short circuit current limit. * Thermal shutdown for overload protection. ORDERING INFORMATION Ordering Number UTRS3088G-S08-R Package SOP-8 Packing Tape Reel UTRS3088G-S08-R (1)Packing Type (1) R: Tape Reel (2)Package Type (2) S08: SOP-8 (3)Green Package (3) G: Halogen Free and Lead Free www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd 1 of 8 QW-R113-012.a UTRS3088 Preliminary MARKING PIN CONFIGURATION RO 1 8 VCC REB 2 7 B DE 3 6 A DI 4 CMOS IC 5 GND PIN DESCRIPTION PIN NO. PIN NAME 1 RO 2 REB 3 DE 4 DI 5 6 7 8 GND A B VCC DESCRIPTION Receiver Output: When REB is low and if (A-B) ≥ -50mV, RO is high; if (A-B) ≤ -200mV, RO is low. Receiver Output Enable: REB is low to enable the Receiver; REB is high to disable the Receiver. Transmitter Output Enable: DE is high to enable the transmitter; DE is low to disable the transmitter. Transmitter Input: When DE is high, a low on DI forces A output low and B output high. Similarly, a high on DI forces A output high and B output low. Ground pin. Must be connected to 0V. Non-inverting Receiver Input and Non-inverting Transmitter Output Inverting Receiver Input and Inverting Transmitter Output Power Supply Input 5.0V. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 8 QW-R113-012.a UTRS3088 Preliminary CMOS IC BLOCK DIAGRAM RO 1 RX 8 VCC REB 2 7 B 3 6 A DE DI 4 TX UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 GND 3 of 8 QW-R113-012.a UTRS3088 Preliminary CMOS IC ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT Power Supply VCC VCC -0.3~8.0 V Control Input Voltage REB, DE -0.3~ (VCC+0.3) V Receiver Input Voltage A, B ±13 V Receiver Output Voltage RO -0.3~ (VCC+0.3) V Transmitter Output Voltage A, B ±13 V Transmitter Input DI -0.3~ (VCC+0.3) V Operating Temperature TOP -40~+85 °C Storage Temperature 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. DC ELECTRICAL CHARACTERISTICS (VCC=5.0V ±5% with TA= TMIN to TMAX, , unless otherwise specified. Typical values are at VCC=5.0V and TAMB=25°C.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT TRANSMITTER Differential Transmitter Output VOD1 No Load 5.0 V Differential Transmitter Output VOD2 Fig.1, RL=27Ω 1.5 V Change in Magnitude of ∆VOD Fig.1, RL=27Ω 0.2 V Differential Output Voltage Transmitter Common- Mode VOC Fig.1, RL=27Ω 3.0 V Output Voltage Change in Magnitude of ∆VOC Fig.1, RL=27Ω 0.2 V Common- Mode Voltage Input High Voltage VIH DE, DI, REB 2.0 V Input Low Voltage VIL DE, DI, REB 0.8 V Input Current IIN1 DI ±1 µA Input Current IIN2 DE, REB ±50 µA DI Input Hysteresis VHYS 100 mV VIN=12V 125 µA DE=GND, Input Current (A and B) IIN3 VCC=GND or 5.25V VIN=-7V -75 µA -250 mA -7V≤VOUT≤VCC Transmitter Short-Circuit IOS Output Current 0V≤VOUT≤12V 250 mA RECEIVER Receiver Differential Threshold VTH -7V≤VCM≤+12V -200 -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=-200mV 0.5 V Three- State Output Current at IOZR 0.4V≤VCM≤2.4V ±1 µA Receiver Receiver Input Resistance RIN -7V≤VCM≤+12V 96 kΩ Receiver Output Short-Circuit IOSR Fig.6 , 0V≤VRO≤VCC ±7 ±95 mΑ Current SUPPLY CURRENT DE=VCC 420 600 µA No Load, Supply Current ICC REB=GND, DE=GND 320 500 µA DI=VCC or GND. Supply Current in Shutdown ISHDN REB=VCC, DE=GND 1.0 15 µA Mode UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 8 QW-R113-012.a UTRS3088 Preliminary CMOS IC SWITCHING CHARACTERISTICS (VCC=5.0V ±5% with TA= TMIN to TMAX, unless otherwise specified. Typical values are at VCC=5.0V and TAMB=25°C.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Fig.2 and 7, RDIFF=54Ω, 70 200 ns Transmitter Input to Output tDPLH, tDPHL CL1=CL2= 100pF Fig.2 and 7, RDIFF=54Ω, Transmitter Output Skew tDSKEW 10 ns | tDPLH - tDPHL | CL1=CL2= 100pF Fig.2 and 7, RDIFF=54Ω, 40 150 ns Transmitter Rise or Fall Time tDF, tDR CL1=CL2= 100pF Maximum Data Rate fMAX 1.0 Mbps Transmitter Enable to Output tDZL Fig.4 and 8, CDL=100pF, S1 Closed 150 ns Low Transmitter Enable to Output tDZH Fig.4 and 8, CDL=100pF, S2 Closed 150 ns High Transmitter Disable Time tDLZ Fig.4 and 8, CDL=15pF, S1 Closed 150 ns from Low Transmitter Disable Time tDHZ Fig.4 and 8, CDL=15pF, S2 Closed 150 ns from High Fig.5 and 9 , |VID|≥2.0V; Rise and 900 1200 ns Receiver Input to Output tRPLH, tRPHL Fall Time of VID≤15ns Fig.5 and 9 , |VID|≥2.0V; Rise and | tRPLH – tRPHL | Different tRSKD 10 ns Receiver Skew Fall Time of VID≤15ns Fig.3 and 10, CRL=100pF, S1 Receiver Enable to Output tRZL 60 150 ns Low Closed Fig.3 and 10, CRL=100pF, S2 Receiver Enable to Output tRZH 60 150 ns High Closed Fig.3 and 10, CRL=100pF, S1 Receiver Disable Time from tRLZ 60 150 ns Low Closed Fig.3 and 10, CRL=100pF, S2 Receiver Disable Time from tRHZ 60 150 ns High Closed Time to Shutdown tSHDN 500 1000 ns Transmitter Enable from tDZL(SHDN) Fig.4 and 8, CDL=15pF, S1 Closed 2500 ns Shutdown to Output Low Transmitter Enable from tDZH(SHDN) Fig.4 and 8, CDL=15pF, S2 Closed 2500 ns Shutdown to Output High Receiver Enable from Fig.3 and 10, CRL=100pF, S1 tRZL(SHDN) 3500 ns Shutdown to Output Low Closed Receiver Enable from Fig.3 and 10, CRL=100pF, S2 tRZH(SHDN) 3500 ns Shutdown to Output High Closed UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 8 QW-R113-012.a UTRS3088 Preliminary CMOS IC FUNCTION TABLE Table 1 TRANSMITTING REB X X 0 1 INPUTS DE 1 1 0 0 OUTPUTS DI 0 1 X X A 0 1 High-Z B 1 0 High-Z Shutdown Table 2 RECEIVING INPUTS DE X X X 1 0 REB A-B 0 ≥-0.05V 0 ≤-0.2V 0 Open/Shorted 1 X 1 X = Don’t care Shutdown mode, driver and receiver outputs high impedance UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw OUTPUTS RO 1 0 1 High-Z Shutdown 6 of 8 QW-R113-012.a UTRS3088 Preliminary CMOS IC TEST CIRCUIT A 1K B Rx VCC VCC DE S1 S1 CRL 1K CDL VDC Tx 500 A REB S2 S2 Fig. 3 Receiver Enable/Disable Timing Test Circuit UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw B Fig. 4 Transmitter Enable/Disable Timing Test Circuit 7 of 8 QW-R113-012.a UTRS3088 Preliminary CMOS IC TEST CIRCUIT (Cont.) VOH RO 1.5V 1.5V REB 3V 0V Output VOL 1.5V 1.5V tRZL tRLZ VCC RO tRPHL tRPLH A Input B -1V Fig. 9 Receiver Propagation Delays RO VOL VOH 0 1.5V Output Normally Low VOL+0.5V Output Normally High 1.5V tRZH VOH-0.5V tRHZ Fig. 10 Receiver Enable and Disable Times 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 8 of 8 QW-R113-012.a