XR33202EEHBTR-F

XR33202 Wide Supply RS-485/RS-422 Transceiver with 1.65V-5.5V I/O Interface Description The XR33202 is a high performance RS-485/RS-422 transceiver designed to meet the increasing system requirements found in today’s portable/handheld, process control and industrial equipment environments. This is a wide supply (3.0V to 5.5V) device that operates at maximum data rate of 20Mbps and features a 1.65V to 5.5V I/O logic supply, simplifying multi-voltage system interfacing requirements. The receiver includes full fail-safe circuitry, guaranteeing a logichigh receiver output when the receiver inputs are open, shorted or undriven. The XR33202 receiver input impedance is at least 96kΩ (1/8 unit load), allowing more than 256 devices on the bus. The driver is protected by short circuit detection as well as thermal shutdown and maintains high impedance in shutdown or when powered off. The XR33202 does not have slew limiting and is intended for high speed applications requiring data rates up to 20Mbps. The DE and RE pins include hot swap circuitry to prevent false transitions on the bus during power up or live insertion and can enter a 1µA low current shutdown mode for extreme power savings. The XR33202 is a half-duplex device that operates at max data rates of 20Mbps. It is available in a 10-pin DFN package. FEATURES ■■ Wide 3.0V to 5.5V supply operation ■■ 1.65V to 5.5V I/O logic interface VL pin ■■ Enhanced receiver fail-safe protection for open, shorted or terminated but idle data lines ■■ Max data rate of 20Mbps ■■ 1/8 unit load, up to 256 receivers ■■ Hot swap glitch protection on DE and RE Pins ■■ Robust ESD (Electrostatic Discharge) protection for RS-485 bus pins ±15kV human body model ±15kV IEC61000-4-2 air discharge ±8kV IEC61000-4-2 contact discharge ■■ Driver short circuit limit and thermal shutdown for overload protection ■■ -40°C to 125°C ambient operating temperature range ■■ Lead-free (RoHS 6) DFN APPLICATIONS ■■ Portable and handheld equipment ■■ Industrial and process control equipment ■■ Point-of-sale equipment ■■ Building security and automation Typical Application 2.5V 2.5V 3.3V 3.3V 1.8V VL VCC VCC VL 1.8V VCC VCC UART TX DI DE RX R RE 120Ω 120Ω XR33202 DI DE TX R RE RX MICRO PROCESSOR XR33202 Figure 1. Typical Application REV2B 1/16 XR33202 Absolute Maximum Ratings Operating Conditions Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Maximum Rating condition for extended periods may affect device reliability and lifetime. Operating temperature range....................... -40°C to 125°C Supply voltage (VCC)....................................... -0.3V to 7.0V Logic interface voltage (VL)....................................VL ≤ VCC Junction temperature.................................................. 150°C VCC supply range..............................................3.0V to 5.5V VL I/O supply range (VL ≤ VCC).......................1.65V to 5.5V Thermal Information θJA......................................................................... 40.5°C/W θJC........................................................................... 8.5°C/W Input voltage DE and DI........................................................ -0.3V to 6.0V RE.......................................................... -0.3V to (VL + 0.3V) Output voltage....................................... -0.3V to (VL + 0.3V) Driver output voltage A/Y, B/Z...................................... ±18V Receiver input voltage A/Y, B/Z.................................... ±18V ESD Ratings HBM - Human Body Model (RS-485 bus pins A/Y, B/Z)........................................ ±15kV HBM - Human Body Model (all other pins)................... ±4kV IEC61000-4-2 Air Discharge (RS-485 bus pins A/Y, B/Z)........................................ ±15kV IEC61000-4-2 Contact Discharge (RS-485 bus pins A/Y, B/Z).......................................... ±8kV REV2B 2/16 XR33202 Pin Configuration VL 1 10 VCC RO 2 9 B/Z DE 3 8 A/Y RE 4 7 NC DI 5 6 GND DFN Pin Functions Pin Number Pin Name Type Description 1 VL Supply I/O power supply, sets the logic levels for RO, DE, RE and DI 2 RO Output Receiver output 3 DE Input Driver enable, driver active when DE = 1, disabled when DE = 0 4 RE Input Receiver enable, receiver is disabled when RE = 1, enabled when RE = 0 5 DI Input Driver input 6 GND Supply 7 NC 8 A/Y I/O ±15kV ESD protected, RS-485/RS-422 half-duplex non-inverting receiver input and non-inverting driver output 9 B/Z I/O ±15kV ESD protected, RS-485/RS-422 half-duplex inverting receiver input and inverting driver output 10 VCC Supply * Paddle Ground No connection, can be connected to ground Power supply Exposed paddle (DFN package), connect to ground Transmitting Receiving Inputs Outputs Inputs Output nRE DE DI A/Y B/Z nRE DE VA/Y - VB/Z RO X 1 1 1 0 0 X ≥ -50mV 1 X 1 0 0 1 0 X -200mV < VA/Y - VB/Z < -50mV Undefined 0 0 X High-Z 0 X ≤ -200mV 0 1 0 X Shutdown 0 X Open/Shorted/Idle 1 1 1 X High-Z 1 0 X Shutdown REV2B 3/16 XR33202 Electrical Characteristics Specifications are at TA = 25°C, VCC = 3.3V ±10% or 5.0V ±10%, VL = VCC unless otherwise noted. Typical values represent the most likely parametric norm at TA = 25°C, and are provided for reference purposes only. Symbol Parameter Conditions Min Typ Max Units RL = 100Ω (RS-422), VCC = 3.0V 2.0 V RL = 54Ω (RS-485), VCC = 3.0V 1.5 V RL = 100Ω (RS-422), VCC = 4.5V 2.25 V RL = 54Ω (RS-485), VCC = 4.5V 2.25 V -0.2 Driver DC Characteristics VOD Differential driver output ∆VOD Change in magnitude of differential output voltage RL = 100Ω or 54Ω VCM Driver common-mode output voltage (steady state) RL = 100Ω or 54Ω ∆VCM Change in magnitude of common-mode output voltage RL = 100Ω or 54Ω IA, B IOL IOSD Input current (A and B) Output leakage (Y and Z) Driver short-circuit output current VCC/2 -0.2 VOUT = 12V, DE = 0V VCC = 0V or 5.5V VOUT = -7V, DE = 0V VCC = 0V or 5.5V 0.2 V 3 V 0.2 V 125 µA -100 µA VOUT = 12V, DE = 0V VCC = 0V or 5.5V 125 VOUT = -7V, DE = 0V VCC = 0V or 5.5V -100 -7V ≤ VOUT ≤ +12V -250 -200 µA µA 250 mA -50 mV Receiver DC Characteristics VTH Receiver differential threshold voltage (VA - VB) -7V ≤ VCM ≤ 12V ∆VOH Receiver input hysteresis VCM = 0V RIN Receiver input resistance -7V ≤ VCM ≤ 12V IOSC Receiver output short-circuit current 0V ≤ VRO ≤ VL -120 Logic input high 2/3*VL -125 25 mV 96 kΩ 120 mA Logic Inputs and Outputs VIH VIL Logic input thresholds (DI, DE, RE) 1.65V ≤ VL ≤ 5.5V & VL ≤ VCC V Logic input low VHYS Input hysteresis (DI, DE, RE) IIN Logic input current (DI, DE, RE) 0V ≤ VIN ≤ VL, after first transition IINHS Logic input current hot swap (DE and RE) Until first transition VOH Receiver output high voltage (RO) 3.0V ≤ VL ≤ 5.5V, IOUT = -1mA 1.6V ≤ VL ≤ 3.0V, IOUT = -1mA VOL Receiver output low voltage (RO) 3.0V ≤ VL ≤ 5.5V, IOUT = 1mA 1.6V ≤ VL ≤ 3.0V, IOUT = 1mA IOZR High-Z receiver output current 0V ≤ VOUT ≤ VL 1/3*VL 50 REV2B mV 1 μA ±320 μA VL - 0.6 -1 V V 0.4 V 1 μA 4/16 XR33202 Electrical Characteristics (Continued) Specifications are at TA = 25°C, VCC = 3.3V ±10% or 5.0V ±10%, VL = VCC unless otherwise noted. Typical values represent the most likely parametric norm at TA = 25°C, and are provided for reference purposes only. Symbol Parameter Conditions Min Typ Max Units 5.5 V Supply VCC ICC ISHDN Supply voltage range Supply current Supply current in shutdwon mode 3.0 No load. RE = 0V, DE = VL, DI = 0V 400 600 μA No load. RE = VL, DE = VL, DI = 0V 300 600 μA No load. RE = 0V, DE = 0V, receiver A and B inputs open 300 500 μA RE = VL, DE = 0V 0.05 3 μA Driver AC Characteristics Specifications are at TA = 25°C, VCC = 3.3V ±10% or 5.0V ±10%, VL = VCC unless otherwise noted. Typical values represent the most likely parametric norm at TA = 25°C, and are provided for reference purposes only. Symbol Parameter tDPLH Driver prop. delay (low to high) tDPHL Driver prop. delay (high to low) |tDPLH-tDPHL| Differential driver output skew tDR, tDF Driver differential output rise or fall time Maximum data rate tDZH Driver enable to output high tDZL Driver enable to output low tDHZ Driver disable from output high tDLZ Driver disable from output low tDZH(SHDN) Driver enable from shutdown to output high tDZL(SHDN) Driver enable from shutdown to output low tSHDN Time to shutdown Conditions Min Typ CL = 50pF, RL = 54Ω, 1/tUI, duty cycle 40% to 60% Max Units 30 ns 30 ns 5 ns 17 ns 20 Mbps CL = 50pF, RL = 500Ω, 50 ns 50 ns 50 ns 50 ns 250 ns 250 ns 600 ns CL = 50pF, RL = 500Ω, 50 REV2B 200 5/16 XR33202 Electrical Characteristics (Continued) Receiver AC Characteristics Specifications are at TA = 25°C, VCC = 3.3V±10% or 5.0V±10%, VL = VCC unless otherwise noted. Typical values represent the most likely parametric norm at TA = 25°C, and are provided for reference purposes only. Symbol Parameter Conditions tRPLH Receiver prop. delay (low to high) tRPHL Receiver prop. delay (high to low) |tRPLH-tRPHL| Receiver propagation delay skew Receiver enable to output high tRZL Receiver enable to output low tRHZ Receiver disable from output high tRLZ Receiver disable from output low tRZH(SHDN) Receiver enable from shutdown to output high tRZL(SHDN) Receiver enable from shutdown to output low tSHDN Time to shutdown Typ CL = 50pF, RL = 54Ω Maximum data rate tRZH Min 1/tUI, duty cycle 40% to 60% Max Units 50 ns 50 ns 5 ns 20 Mbps CL = 50pF, RL = 1kΩ, 50 ns 50 ns 50 ns 50 ns 2200 ns 2200 ns 600 ns CL = 50pF, RL = 1kΩ, 50 200 Functional Block Diagram VL VCC B RO A A/Y RE DE Y DI B/Z Z XR33202 Figure 2. Functional Block Diagram REV2B 6/16 XR33202 Applications Information DI = OV or VCC RL 2 VOD D RL 2 DE = VCC Z VCM Y Figure 3. Differential Driver Output Voltage Z 375Ω DI = OV or VCC VOD D VCM 60Ω 375Ω Y DE = VCC Figure 4. Differential Driver Output Voltage Over Common Mode Z DI = OV or VCC D IOSD Y -7V to 12V V DE = OV or VCC Figure 5. Driver Output Short Circuit Current REV2B 7/16 XR33202 Applications Information (Continued) DI 3V 1.5V OV Z 1.5V tDPHL tDPLH VOD Y VOD (VY - VZ) tSKEW = tDPLH – tDPHL VOD+ OV VOD– 90% 10% 90% tDR 10% tDF Z DI VOD D RL CL Y DE = VCC Figure 6. Driver Propagation Delay Test Circuit and Timing Diagram REV2B 8/16 XR33202 Applications Information (Continued) Z TESTING Z: DI = OV D VOUT TESTING Y: DI = VCC Y DE 3V DE OV 1.5V CL 1.5V tDHZ tDZH VOUT RL VOH VOH – 0.25V VOH + VOL 2 VOL VCC Z TESTING Z: DI = VCC RL D VOUT TESTING Y: DI = OV Y CL DE 3V DE OV 1.5V 1.5V tDLZ tDZL VOUT VOH VOL VOH + VOL 2 VOL + 0.25V Figure 7. Driver Enable and Disable Timing Test Circuits and Timing Diagrams REV2B 9/16 XR33202 Applications Information (Continued) B R RO CL A RE = OV +1V 0V –1V B VID A tRPLH tRPHL VOH RO VCC/2 VCC/2 VOL Figure 8. Receiver Propagation Delay Test Circuit and Timing Diagram REV2B 10/16 XR33202 Applications Information (Continued) B R A 3V RE OV RO RL RE 1.5V 1.5V VA = VCC VB = OV tRHZ tRZH VOH RO CL VOH – 0.25V VOH 2 OV VCC B RL R A 3V RE OV VA = OV VB = VCC RO RO CL RE 1.5V 1.5V tRLZ tRZL VCC VOL VCC + VOL 2 VOL + 0.25V Figure 9. Receiver Enable and Disable Test Circuits and Timing Diagrams REV2B 11/16 XR33202 Applications Information (Continued) The XR33202 RS-485/RS-422 devices are part of MaxLinear’s high performance serial interface product line. Enhanced Failsafe Ordinary RS-485 differential receivers will be in an indeterminate state whenever the data bus is not being actively driven. The enhanced failsafe feature of the XR33202 guarantees a logic-high receiver output when the receiver inputs are open, shorted or when they are connected to a terminated transmission line with all drivers disabled. In a terminated bus with all transmitters disabled, the receivers’ differential input voltage is pulled to 0V by the termination. The XR33202 interprets 0V differential as a logic high with a minimum 50mV noise margin while maintaining compliance with the RS-485 standard of ±200mV. Although the XR33202 does not need failsafe biasing resistors, it can operate without issue if biasing is used. Hot Swap Capability When VCC is first applied the XR33202 holds the driver enable and receiver enable inactive for approximately 10μs. During power ramp-up, other system ICs may drive unpredictable values or tristated lines may be influenced by stray capacitance. The hot swap feature prevents the XR33202 from driving any output signal until power has stabilized. After the initial 10μs, the driver and receiver enable pins are weakly pulled to their disabled states (low for DE and high for RE) until the first transition. After the first transition, the DE and RE pins operate as high impedance inputs. If circuit boards are inserted into an energized backplane (commonly called “live insertion” or “hot swap”) power may suddenly be applied to all circuits. Without the hot swap capability, this situation could improperly enable the transceiver’s driver or receiver, driving invalid data onto shared buses and possibly causing driver contention or device damage. Driver Output Protection Two mechanisms prevent excessive output current and power dissipation caused by faults or by bus contention. First, a driver current limit on the output stage provides immediate protection against short circuits over the whole common-mode voltage range. Second, a thermal shutdown circuit forces the driver outputs into a high impedance state if junction temperature becomes excessive. Line Length The RS-485/RS-422 standard covers cable lengths up to 4000 feet. Maximum achievable line length for a specific application is a function of many factors, the data rate, cable properties, the driver/receiver characteristics and whether or not termination or stubs are used. For lower speed applications, data rates