ST485EBDR UMW | Alldatasheet
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Low Quiescent Current: 300µA -7V to +12V Common-Mode Input Voltage Range Three-State Outputs 30ns Propagation Delays, 5ns Skew Full-Duplex and Half-Duplex Versions Available Operate from a Single 5V Supply Allows up to 32 Transceivers on the Bus Data rate: 2,5 Mbps Current-Limiting and Thermal Shutdown for Driver Overload Protection U MW ST485E R www.umw-ic.com 1 UTD Semiconductor Co.,Limited
ply Voltage (VCC) 12V Continuous Power Dissipation (T A= +70°C) Control Input Voltage -0.5V to (VCC + 0.5V) 8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) 727mW Driver Input Voltage (DI) -0.5V to (VCC+ 0.5V) 8-Pin SO (derate 5.88mW/°C above +70°C) 471mW Driver Output Voltage (A, B) -8V to +12.5V Operating Temperature Ranges-40°C to +85°C Receiver Input Voltage (A, B) -8V to +12.5V Storage Temperature Range -65°C to +160°C Receiver Output Voltage (RO) -0.5V to (VCC+0.5V) Lead Temperature (soldering, 10sec) +300°C DC ELECTRICAL CHARACTERISTICS (VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Differential Driver Output (no load) VOD1 5 V R = 50Ω (RS-422) 2 Differential Driver Output (with load) VOD2 R = 27Ω (RS-485), Figure 4 1.5 5 V Change in Magnitude of Driver Differential Output Voltage for Complementary Output States ∆VOD R = 27Ω or 50Ω, Figure 4 0.2 V Driver Common-Mode Output Voltage VOC R = 27Ω or 50Ω, Figure 4 3 V Change in Magnitude of Driver Common-Mode Output Voltage for Complementary Output States ∆VOD R = 27Ω or 50Ω, Figure 4 0.2 V Input High Voltage VIH DE, DI, RE 2.0 V Input Low Voltage VIL DE, DI, RE 0.8 V Input Current IIN1 DE, DI, RE ±2 µA DE = 0V; VIN = 12V 1.0 Input Current (A, B) IIN2 VCC = 0V or 5.25V, VIN = -7V -0.8 mA Receiver Differential Threshold Voltage VTH -7V ≤ VCM ≤12V -0.2 0.2 V Receiver Input Hysteresis ∆VTH VCM = 0V 70 mV Receiver Output High Voltage VOH IO = -4mA, VID = 200mV 3.5 V Receiver Output Low Voltage VOL IO = 4mA, VID = -200mV 0.4 V Three-State (high impedance) Output Current at Receiver IOZR 0.4V ≤ VO ≤ 2.4V ±1 µA Receiver Input Resistance RIN -7V ≤ VCM ≤ 12V kΩ www.umw-ic.com 2 UTD Semiconductor Co.,Limited Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers UMW ST485E R
DC ELECTRICAL CHARACTERISTICS (continued) (VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DE = VCC 500 900 RE = 0V or VCC 300 500 No-Load Supply Current (Note 3) ICC DE = 0V µA Driver Short-Circuit Current, IOSD1 -7V ≤ VO ≤ 12V (Note 4) 35 250 mA VO = High Driver Short-Circuit Current, IOSD2 -7V ≤ VO ≤12V (Note 4) 35 250 mA VO = Low Receiver Short-Circuit Current IOSR 0V ≤ VO ≤ VCC 7 95 mA SWITCHING CHARACTERISTICS (VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS tPLH RDIFF = 54Ω 10 30 60 Driver Input to Output tPHL CL1 = CL2 = 100pF 10 30 60 ns Driver Output Skew to Output tSKEW RDIFF = 54Ω, CL1 = CL2 = 100pF 5 10 ns Driver Enable to Output High tZH CL= 100pF, S2 closed 40 70 ns Driver Enable to Output Low tZL CL= 100pF, S1 closed 40 70 ns Driver Disable Time from Low tLZ CL= 15pF, S1 closed 40 70 ns Driver Disable Time from High tHZ CL= 15pF, S2 closed 40 70 ns | tPLH - tPHL | Differential tSKD RDIFF = 54Ω 13 ns Receiver Skew CL1 = CL2 = 100pF Receiver Enable to Output Low tZL CRL = 15pF, S1 closed 20 50 ns Receiver Enable to Output High tZH CRL = 15pF, S2 closed 20 50 ns Receiver Disable Time from Low tLZ CRL = 15pF, S1 closed 20 50 ns Receiver Disable Time from High tHZ CRL = 15pF, S2 closed 20 50 ns Maximum Data Rate fMAX 2.5 Mbps www.umw-ic.com 3 UTD Semiconductor Co.,Limited Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers UMW ST485E R
Operation timing diagrams of ST485 Table of ST485 operation Transmission Receipt Inputs Outputs X Inputs Outputs RE DE DI Z Y RE DE A-B RO X 1 1 0 1 0 0 +0.2V 1 X 1 0 1 0 0 0 -0.2V 0 0 0 X Z Z 0 0 open 1 1 0 X Z Z 1 0 X Z X-don’t care Z-high resistance www.umw-ic.com 4 UTD Semiconductor Co.,Limited Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers UMW ST485E R
A 1.350 1.750 0.053 0.069 A1 0.100 0.250 0.004 0.010 A2 1.350 1.550 0.053 0.061 b 0.330 0.510 0.013 0.020 c 0.170 0.250 0.006 0.010 D 4.700 5.100 0.185 0.200 E 3.800 4.000 0.150 0.157 E1 5.800 6.200 0.228 0.244 e L 0.400 1.270 0.016 0.050 θ 0 °8 °0 °8 ° Dimensions In Millimeters Dimensions In InchesSymbol 1.270(BSC) 0.050(BSC)S OP-8www.umw-ic.com 5 UTD Semiconductor Co.,Limited Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers UMW ST485E R
Order code Package Baseqty Deliverymode SOP-8 2500 Tape and reelw ww.umw-ic.com 6 UTD Semiconductor Co.,Limited Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers UMW ST485E R UMW ST485EBDR