TECHNICAL DATA Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers General Description The ILX3485 is low-power transceivers for RS-485-3.3 and RS- 422-3.3 communication. IC contains one driver and one receiver. The driver slew rates of the ILX3485 is not limited, allowing them to transmit up to 2.5Mbps. These transceivers draw between 120µA and 500µA of supply current when unloaded or fully loaded with disabled drivers. All parts operate from a single 3.3V supply. Drivers are short-circuit current limited and are protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state.The receiver input has a fail-safe feature that guarantees a logic-high output if the input is open circuit. ILX3485 ORDERING INFORMATION ILX3485N Plastic ILX3485D SOIC Features § 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 3.3V Supply Allows up to 32 Transceivers on the Bus Data rate: 2,5 Mbps Current-Limiting and Thermal Shutdown for Driver Overload Protection § The transmitter outputs and receiver inputs are protected to ±15kV Air ESD. § § § § § § § § Rev. 01 ILX3485 ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC) 7V Control Input Voltage -0.3V to 7V Driver Input Voltage (DI) -0.3V to 7V Driver Output Voltage (A, B) -7.5V to +12.5V Receiver Input Voltage (A, B) -7.5V to +12.5V Receiver Output Voltage (RO) -0.3V to (VCC+0.3V) Continuous Power Dissipation (T A= +70°C) 8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) 727mW 8-Pin SOP (derate 5.88mW/°C above +70°C) 471mW Operating Temperature Ranges 0°C to +70°C Storage Temperature Range -65°C to +160°C Lead Temperature (soldering, 10sec) +300°C DC ELECTRICAL CHARACTERISTICS (VCC = 3.3V ±10%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2) PARAMETER SYMBOL Differential Driver Output (no load) Differential Driver Output (with load) Change in Magnitude of Driver Differential Output Voltage for Complementary Output States Driver Common-Mode Output Voltage Change in Magnitude of Driver Common-Mode Output Voltage for Complementary Output States Input High Voltage VOD1 VOD2 CONDITIONS ∆VOD R = 100Ω (RS-422) R = 54Ω (RS-485), Figure 4 R = 54Ω or 50Ω, Figure 4 VOC ∆VOD MIN TYP MAX UNITS 2 V 1 0.8 V 0.2 V R = 54Ω or 100Ω, Figure 4 2 V R = 54Ω or 100Ω, Figure 4 0.2 V VIH DE, DI, RE Input Low Voltage VIL DE, DI, RE 0.8 V Input Current Input Current (A, B) IIN1 DE, DI, RE DE = 0V; ±2 µA 1.0 mA IIN2 VCC = 0V or 5.25V, Receiver Differential Threshold Voltage Receiver Input Hysteresis Receiver Output High Voltage Receiver Output Low Voltage Three-State (high impedance) Output Current at Receiver Receiver Input Resistance VTH ∆VTH VOH VOL IOZR RIN 2.0 VIN = 12V VIN = 7V -7V ≤ VCM ≤12V VCM = 0V IO = -1.5mA, VID = 200mV IO = 2.5mA, VID = -200mV 0.4V ≤ VO ≤ 2.4V -7V ≤ VCM ≤ 12V V -0.8 -0.2 0.2 V 0.4 ±1 mV V V µA 70 2.5 12 kΩ Rev. 01 ILX3485 DC ELECTRICAL CHARACTERISTICS (continued) (VCC = 3.3V ±10%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2) PARAMETER No-Load Supply Current (Note 3) SYMBOL ICC CONDITIONS MIN DE = VCC RE = 0V or VCC DE = 0V TY P MAX UNITS 500 300 800 400 µA Driver Short-Circuit Current, IOSD1 -7V ≤ VO ≤ 12V (Note 4) 250 mA IOSD2 -7V ≤ VO ≤12V (Note 4) 250 mA IOSR 0V ≤ VO ≤ VCC 95 mA VO = High Driver Short-Circuit Current, VO = Low Receiver Short-Circuit Current ±6.5 SWITCHING CHARACTERISTICS (VCC = 3.3V ±10%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2) PARAMETER Driver Input to Output Driver Output Skew to Output Driver Enable to Output High Driver Enable to Output Low Driver Disable Time from Low Driver Disable Time from High | tPLH - tPHL | Differential Receiver Skew Receiver Enable to Output Low Receiver Enable to Output High Receiver Disable Time from Low Receiver Disable Time from High Maximum Data Rate SYMBOL CONDITIONS MIN TYP MAX UNITS tPLH tPHL 10 10 30 30 5 45 45 40 40 13 60 60 10 90 90 80 80 ns tZL tZH tLZ RDIFF = 54W CL1 = CL2 = 100pF RDIFF = 54W, CL1 = CL2 = 100pF CL= 100pF, S2 closed CL= 100pF, S1 closed CL= 15pF, S1 closed CL= 15pF, S2 closed RDIFF = 54W CL1 = CL2 = 100pF CRL = 15pF, S1 closed CRL = 15pF, S2 closed CRL = 15pF, S1 closed tHZ CRL = 15pF, S2 closed tSKEW tZH tZL tLZ tHZ tSKD fMAX 2.5 ns ns ns ns ns ns 20 20 50 50 50 ns ns ns 20 50 ns Mbps Rev. 01 ILX3485 Rev. 01 ILX3485 Operation timing diagrams of ILX3485 Table of ILX 3485 operation Transmitting RE X X 0 1 Inputs DE 1 1 0 0 DI 1 0 X X Outputs X Z Y 0 1 1 0 Z Z Z Z RE 0 0 0 1 Receiving Inputs DE A-B 0 +0.2V 0 -0.2V 0 open 0 X Outputs RO 1 0 1 Z X-don’t care Z-high impedance Rev. 01 ILX3485 N SUFFIX PLASTIC DIP (MS – 001BA) A Dimension, mm 5 8 B 1 4 F C -T- SEATING PLANE G M K 0.25 (0.010) M J H D MIN MAX A 8.51 10.16 B 6.1 7.11 5.33 C L N Symbol T NOTES: 1. Dimensions “A”, “B” do not include mold flash or protrusions. Maximum mold flash or protrusions 0.25 mm (0.010) per side. D 0.36 0.56 F 1.14 1.78 G 2.54 H 7.62 J 0° 10° K 2.92 3.81 L 7.62 8.26 M 0.2 0.36 N 0.38 D SUFFIX SOIC (MS - 012AA) Dimension, mm A 8 5 B H 1 G P 4 R x 45 C -TD K SEATING PLANE J F 0.25 (0.010) M T C M NOTES: 1. Dimensions A and B do not include mold flash or protrusion. 2. Maximum mold flash or protrusion 0.15 mm (0.006) per side for A; for B ‑ 0.25 mm (0.010) per side. M Symbol MIN MAX A 4.8 5 B 3.8 4 C 1.35 1.75 D 0.33 0.51 F 0.4 1.27 G 1.27 H 5.72 J 0° 8° K 0.1 0.25 M 0.19 0.25 P 5.8 6.2 R 0.25 0.5 Rev. 01