XD3485

XL3483 SOP8 XL3485 SOP8 XD3485 DIP8 True RS-485/RS-422 Transceivers General Description Features 3483 and 3485, 3.3V, low-power transceivers for RS-485 and RS-422 communication. Each part contains one driver and one receiver. The 3483 feature slew-rate-limited drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 250kbps. 2.5Mbps. 3485, transmit at up to 10Mbps. 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 both inputs are open circuit. Operate from a Single 3.3V Supply— No Charge Pump! ◆ Interoperable with +5V Logic ◆ ♦ 8ns Max Skew 3485 ◆ Slew-Rate Limited for Errorless Data Transmission ♦ 3483 ◆ ♦ 2nA Low-Current Shutdown Mode 3483/3485 -7V to +12V Common-Mode Input Voltage Range ◆ ♦ ♦ ♦ Allows up to 32 Transceivers on the Bus ◆ ◆ ♦ Full-Duplex and Half-Duplex Versions Available ♦ ◆ Current-Limiting and Thermal Shutdown for Driver Overload Protection Applications Ordering Information Low-Power RS-485/RS-422 Transceivers PART XL3483 Telecommunications XL3485 XD3485 Transceivers for EMI-Sensitive Applications Industrial-Control Local Area Networks 1 PIN-PACKAGE SOP8 TEMP. RANGE SOP8 0°C to +70°C 0°C to +70°C DIP8 0°C to +70°C XL3483 SOP8 XL3485 SOP8 XD3485 DIP8 ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC) ...............................................................7V Control Input Voltage (RE, DE) ...................................-0.3V to 7V Driver Input Voltage (DI) .............................................-0.3V to 7V Driver Output Voltage (A, B, Y, Z)..........................-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 (TA = +70°C) 8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) .....727mW 8-Pin SO (derate 5.88mW/°C above +70°C)..................471mW 14-Pin Plastic DIP (derate 10mW/°C above +70°C) ......800mW 14-Pin SO (derate 8.33mW/°C above +70°C)................667mW Operating Temperature Ranges 3483/3485...............................................................0°C to +70°C Storage Temperature Range .............................-65°C to +160°C Lead Temperature (soldering, 10sec) .............................+300°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICS (VCC = 3.3V ±0.3V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C) PARAMETER Differential Driver Output SYMBOL VOD CONDITIONS MIN RL = 100Ω (RS-422), Figure 2 2.0 RL = 54Ω (RS-485), Figure 2 1.5 RL = 60Ω (RS-485), VCC = 3.3V, Figure 3 1.5 TYP MAX UNITS V Change in Magnitude of Driver Differential Output Voltage for Complementary Output States (Note 1) ∆VOD RL = 54Ω or 100Ω, Figure 4 0.2 V Driver Common-Mode Output Voltage VOC RL = 54Ω or 100Ω, Figure 4 3 V ∆VOC RL = 54Ω or 100Ω, Figure 4 0.2 V Change in Magnitude of Common-Mode Output Voltage (Note 1) Input High Voltage VIH DE, DI, RE Input Low Voltage VIL DE, DI, RE 2.0 0.8 V V Logic Input Current IIN1 DE, DI, RE ±2 µA Input Current (A, B) IIN2 DE = 0V, VCC = 0V or 3.6V Receiver Differential Threshold Voltage VTH -7V ≤ VCM ≤ 12V VIN = 12V 1.0 VIN = -7V -0.8 -0.2 0.2 mA V Receiver Input Hysteresis ∆VTH VCM = 0V Receiver Output High Voltage VOH IOUT = -1.5mA, VID = 200mV, Figure 4 Receiver Output Low Voltage VOL IOUT = 2.5mA, VID = 200mV, Figure 4 0.4 V Three-State (High Impedance) Output Current at Receiver IOZR VCC = 3.6V, 0V ≤ VOUT ≤ VCC ±1 µA Receiver Input Resistance RIN -7V ≤ VCM ≤ 12V 50 12 2 mV VCC - 0.4 V kΩ XL3483 SOP8 XL3485 SOP8 XD3485 DIP8 DC ELECTRICAL CHARACTERISTICS (continued) (VCC = 3.3V ±0.3V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C) PARAMETER Supply Current SYMBOL ICC Supply Current in Shutdown Mode ISHDN Driver Short-Circuit Output Current IOSD Receiver Short-Circuit Output Current IOSR CONDITIONS No load, DI = 0V or VCC MIN TYP MAX DE = VCC, RE = 0V or VCC 1.1 2.2 DE = 0V, RE = 0V 0.95 mA DE = 0V, RE = VCC, DI = VCC or 0V 0.002 1.9 1 VOUT = -7V -250 VOUT = 12V 250 0V ≤ VRO ≤ VCC UNITS ±8 ±60 µA mA mA DRIVER SWITCHING CHARACTERISTICS—3485 (VCC = 3.3V, TA = +25°C) MIN TYP MAX Driver Differential Output Delay PARAMETER SYMBOL tDD RL = 60Ω, Figure 5 1 22 35 ns Driver Differential Output Transition Time tTD RL = 60Ω, Figure 5 3 8 25 ns Driver Propagation Delay, Low-to-High Level tPLH RL = 27Ω, Figure 6 7 22 35 ns Driver Propagation Delay, High-to-Low Level tPHL RL = 27Ω, Figure 6 7 22 35 ns |tPLH - tPHL| Driver Propagation Delay Skew (Note 2) DRIVER OUTPUT ENABLE/DISABLE TIMES (3485) tPDS RL = 27Ω, Figure 6 8 ns Driver Output Enable Time to Low Level tPZL RL = 110Ω, Figure 8 45 90 ns Driver Output Enable Time to High Level tPZH RL = 110Ω, Figure 7 45 90 ns Driver Output Disable Time from High Level tPHZ RL = 110Ω, Figure 7 40 80 ns Driver Output Disable Time from Low Level tPLZ RL = 110Ω, Figure 8 40 80 ns 3 CONDITIONS UNITS XL3483 SOP8 XL3485 SOP8 XD3485 DIP8 DRIVER SWITCHING CHARACTERISTICS—3483 (VCC = 3.3V, TA = +25°C) MIN TYP Driver Differential Output Delay PARAMETER SYMBOL tDD RL = 60Ω, Figure 7 CONDITIONS 600 900 MAX 1400 UNITS ns Driver Differential Output Transition Time tTD RL = 60Ω, Figure 7 400 700 1200 ns Driver Propagation Delay, Low-to-High Level tPLH RL = 27Ω, Figure 8 700 1000 1500 ns Driver Propagation Delay, High-to-Low Level tPHL RL = 27Ω, Figure 8 700 1000 1500 ns |tPLH - tPHL| Driver Propagation Delay Skew (Note 2) DRIVER OUTPUT ENABLE/DISABLE TIMES (3483 only) tPDS RL = 27Ω, Figure 8 100 Driver Output Enable Time to Low Level tPZL RL = 110Ω, Figure 10 900 1300 ns Driver Output Enable Time to High Level tPZH RL = 110Ω, Figure 9 600 800 ns Driver Output Disable Time from High Level tPHZ RL = 110Ω, Figure 9 50 80 ns Driver Output Disable Time from Low Level tPLZ RL = 110Ω, Figure 10 50 80 ns Driver Output Enable Time from Shutdown to Low Level tPSL RL = 110Ω, Figure 10 1.9 2.7 µs Driver Output Enable Time from Shutdown to High Level tPSH RL = 110Ω, Figure 9 2.2 3.0 µs MIN TYP MAX 3483/3485 (Note 3) 80 190 300 ns RECEIVER SWITCHING CHARACTERISTICS (VCC = 3.3V, TA = +25°C) PARAMETER SYMBOL Time to Shutdown tSHDN Receiver Propagation Delay, Low-to-High Level tRPLH Receiver Propagation Delay, High-to-Low Level tRPHL |tPLH - tPHL| Receiver tRPDS Propagation Delay Skew CONDITIONS VID = 0V to 3.0V, CL = 15pF, Figure 9 25 65 90 3483 25 75 120 VID = 0V to 3.0V, CL = 15pF, Figure 9 25 65 90 3483 25 75 120 VID = 0V to 3.0V, CL = 15pF, Figure 9 10 3483 20 UNITS ns ns ns ns Receiver Output Enable Time to Low Level tPRZL CL = 15pF, Figure 10, 3483/3485 25 ns Receiver Output Enable Time to High Level tPRZH CL = 15pF, Figure 10, 3483/3485 25 ns Receiver Output Disable Time from High Level tPRHZ CL = 15pF, Figure 10, 3483/3485 25 ns Receiver Output Disable Time from Low Level tPRLZ CL = 15pF, Figure 10, 3483/3485 25 ns Receiver Output Enable Time from Shutdown to Low Level tPRSL CL = 15pF, Figure 10, 3483/3485 720 ns Receiver Output Enable Time from Shutdown to High Level tPRSH CL = 15pF, Figure 10, 3483/3485 720 ns Note 1: ∆VOD and ∆VOC are the changes in VOD and VOC, respectively, when the DI input changes state. Note 2: Measured on |tPLH (Y) - tPHL (Y)| and |tPLH (Z) - tPHL (Z)|. Note 3: The transceivers are put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 80ns, the parts are guaranteed not to enter shutdown. If the inputs are in this state for at least 300ns, the parts are guaranteed to have entered shutdown. See Low-Power Shutdown Mode section. 4 XL3483 SOP8 XL3485 SOP8 XD3485 DIP8 Typical Operating Characteristics (VCC = 3.3V, TA = +25°C, unless otherwise noted.) OUTPUT CURRENT vs. RECEIVER OUTPUT LOW VOLTAGE RECEIVER OUTPUT HIGH VOLTAGE vs. TEMPERATURE OUTPUT CURRENT vs. RECEIVER OUTPUT HIGH VOLTAGE 25 -20 3.30 IRO = 1.5mA 15 10 OUTPUT HIGH VOLTAGE (V) 20 OUTPUT CURRENT (mA) OUTPUT CURRENT (mA) -18 -16 -14 -12 -10 -8 -6 -4 5 3.25 3.20 3.15 3.10 3.05 -2 0 0 0 0.5 1.0 1.5 2.0 2.5 3.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 -40 OUTPUT HIGH VOLTAGE (V) RECEIVER OUTPUT LOW VOLTAGE vs. TEMPERATURE DRIVER OUTPUT CURRENT vs. DIFFERENTIAL OUTPUT VOLTAGE DIFFERENTIAL OUTPUT VOLTAGE (V) OUTPUT CURRENT (mA) 0.6 0.5 0.4 0.3 0.2 80 70 60 50 40 30 20 0.1 10 0 0 -20 0 20 40 60 80 100 40 0.5 1.0 1.5 2.0 2.5 3.0 DIFFERENTIAL OUTPUT VOLTAGE (V) OUTPUT CURRENT vs. DRIVER OUTPUT LOW VOLTAGE OUTPUT CURRENT (mA) 150 125 100 75 50 2.3 2.2 2.1 2.0 1.9 1.8 1.7 3.5 -40 -20 0 20 40 -80 -60 -40 -20 0 0 6 8 10 12 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 OUTPUT HIGH VOLTAGE (V) OUTPUT LOW VOLTAGE (V) 5 60 TEMPERATURE (°C) 25 4 100 2.4 -100 2 80 R = 54Ω 2.5 OUTPUT CURRENT vs. DRIVER OUTPUT HIGH VOLTAGE 175 0 60 1.6 0 TEMPERATURE (°C) OUTPUT CURRENT (mA) -40 20 2.6 90 0.7 0 DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs.TEMPERATURE 100 IRO = 2.5mA -20 TEMPERATURE (°C) OUTPUT LOW VOLTAGE (V) 0.8 OUTPUT LOW VOLTAGE (V) 3.00 0 3.5 4 5 80 100 XL3483 SOP8 XL3485 SOP8 XD3485 DIP8 Typical Operating Characteristics (continued) SHUTDOWN CURRENT vs. TEMPERATURE SUPPLY CURRENT vs. TEMPERATURE 1.2 100 90 SHUTDOWN CURRENT (nA) SUPPLY CURRENT (mA) X = DON’T CARE 1.1 DE = VCC, RE = X 1.0 DE = 0, RE = 0 0.9 0.8 80 70 60 50 40 30 20 10 0.7 0 -40 -20 0 20 40 60 80 -40 100 -20 0 20 40 60 80 100 TEMPERATURE (°C) TEMPERATURE (°C) Pin Description PIN NAME FUNCTION 1 RO Receiver Output. If A > B by 200mV, RO will be high; if A < B by 200mV, RO will be low. 2 – RE Receiver Output Enable. RO is enabled when RE is low; RO is high impedance when RE is high. If RE is high and DE is low, the device will enter a low-power shutdown mode. 3 DE Driver Output Enable. The driver outputs are enabled by bringing DE high. They are high impedance when DE is low. If RE is high and DE is low, the device will enter a low-power shutdown mode. If the driver outputs are enabled, the parts function as line drivers. While they are high impedance, they function as line receivers if RE is low. 4 DI Driver Input. A low on DI forces output Y low and output Z high. Similarly, a high on DI forces output Y high and output Z low. 5 GND — Y Noninverting Driver Output — Z Inverting Driver Output 6 A Noninverting Receiver Input and Noninverting Driver Output — A Noninverting Receiver Input 7 B Inverting Receiver Input and Inverting Driver Output — B Inverting Receiver Input 8 VCC Positive Supply: 3.0V ≤ VCC ≤ 3.6V — N.C. No Connect—not internally connected 3483/3485 Ground 6 XL3483 SOP8 XL3485 SOP8 XD3485 DIP8 TOP VIEW DE 3483/3485 R VCC RO RE 2 7 B RE 2 DE 3 6 A DE 3 5 GND DI 4 DI 4 D R 1 8 1 RO 8 VCC 7 B Rt 6 A 5 GND D D DI B Rt A RO R RE DIP/SO NOTE: PIN LABELS Y AND Z ON TIMING, TEST, AND WAVEFORM DIAGRAMS REFER TO PINS A AND B WHEN DE IS HIGH. Figure 1. 3483/3485 Pin Configuration and Typical Operating Circuit 375Ω RL 2 VCM = -7V to +12V VOD D D RL 2 VCC VOD RL VOC VCC Figure 2. Driver VOD and VOC VID 375Ω Figure 3. Driver VOD with Varying Common-Mode Voltage R 0V VOL IOL (+) VOH IOH (-) Figure 4. Receiver VOH and VOL 3V IN 1.5V 1.5V CL D GENERATOR (NOTE 4) 0V RL = 60Ω OUT tDO tDO ≈ 50Ω 90% VCC OUT CL CL = 15pF (NOTE 5) 50% 10% tTD Figure 5. Driver Differential Output Delay and Transition Times 7 90% 50% 10% tTD 2.0V ≈ -2.0V XL3483 SOP8 XL3485 SOP8 XD3485 DIP8 3V VOM IN 1.5V 1.5V RL = 27Ω 0V S1 GENERATOR (NOTE 4) tPLH OUT D 50Ω VOH Y OUT CL = 15pF (NOTE 5) VCC tPHL VOM VOM VOL VOM = VOH + VOL 2 tPHL ≈ 1.5V tPLH VOH Z OUT VOM VOM VOL Figure 6. Driver Propagation Times 3V S1 0V OR 3V OUT D IN 1.5V 1.5V 0V GENERATOR (NOTE 4) RL = 110Ω CL = 50pF (NOTE 5) tPZH tPHZ 50Ω 0.25V OUT VOH + VOL VOM = 2 VOH VOM ≈ 1.5V 0V Figure 7. Driver Enable and Disable Times (tPZH, tPSH, tPHZ) VCC 3V RL = 110Ω IN S1 0V OR 3V 1.5V 1.5V 0V OUT D tPSL GENERATOR (NOTE 4) CL = 50pF (NOTE 5) tPLZ VCC OUT 50Ω VOM 0.25V Figure 8. Driver Enable and Disable Times (t PZL, tPSL, tPLZ) 8 VOL XL3483 SOP8 XL3485 SOP8 XD3485 DIP8 3.0V GENERATOR (NOTE 4) VID OUT R IN 50Ω 1.5V 1.5V CL = 15pF (NOTE 5) 0V tRPLH tRPHL VCC 1.5V VOM = 0V VOM OUT VCC 2 VOM 0V Figure 9. Receiver Propagation Delay S1 S3 1.5V 1k -1.5V VID VCC R S2 CL (NOTE 5) GENERATOR (NOTE 4) 50Ω 3V IN 1.5V 0V 3V S1 OPEN S2 CLOSED S3 = 1.5V IN 1.5V 0V tPRZH tPRSH tPRZL tPRSL VOH OUT VCC OUT 1.5V 1.5V 0V VOL 3V IN S1 CLOSED S2 OPEN S3 = -1.5V 1.5V 0V 3V S1 OPEN S2 CLOSED S3 = 1.5V IN 1.5V 0V S1 CLOSED S2 OPEN S3 = -1.5V tPRHZ OUT 0.25V tPRLZ VOH OUT 0V VCC 0.25V VOL Figure 10. Receiver Enable and Disable Times Note 4: The input pulse is supplied by a generator with the following characteristics: PRR = 250kHz, 50% duty cycle, tr ≤ 6.0ns, ZO = 50Ω. Note 5: CL includes probe and stray capacitance. 9 XL3483 SOP8 XL3485 SOP8 XD3485 DIP8 910 XL3483 SOP8 XL3485 SOP8 XD3485 DIP8 911