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SP483EEN-L EXAR | Alldatasheet

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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP483E_00_02092

DESCRIPTION

+5V Only
Low Power BiCMOS
Driver / Receiver Enable for Multi-Drop Configurations
Enhanced ESD Specifications: +/-5kV Human Body Model +/-15kV IEC61000-4-2 Air Discharge +/-8kV IEC61000-4-2 Contact Discharge
Low EMI Transceiver limited to 250kbps
Low Power µA Shutdown Mode SP483E Enhanced Low EMI Half-Duplex RS-485 Transceiver The SP483E is a half-duplex transceiver that meets the specifications of RS-485 and RS-422 serial protocols with enhanced ESD performance. The ESD tolerance has been improved on these devices to over +15kV for both Human Body Model and IEC61000-4-2 Air Discharge Method. This devices is pin-to-pin compatible with Exar's SP483 device as well as popular industry standards. As with the original versions, the SP483E feature Exar's BiCMOS de- sign allowing low power operation without sacrificing performance. The SP483E is internally slew rate limited to reduce EMI and can meet the requirements of RS-485 and RS-422 up to 250kbps. The SP483E is also equipped with a low power shutdown mode.

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP483E_00_02092 ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. Input Voltages

ELECTRICAL CHARACTERISTICS

TMIN to TMAX and VCC = +5.0V +/-5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP483E DRIVER DC Characteristics Differential Output Voltage GND Vcc Volts Unloaded; R = ∞ ; See Figure 1 Differential Output Voltage 2 Vcc Volts With Load; R = 50Ω (RS-422); See Figure 1 Differential Output Voltage .5 Vcc Volts With Load; R = 27Ω (RS-485); See Figure 1 Change in Magnitude of Driver Differential Output Voltage for Complimentary states

0.2 Volts R = 27Ω or R = 50Ω; See Figure 1

3 Volts R = 27Ω or R = 50Ω; See Figure 1

Input High Voltage 2.0 Volts Applies to DE, DI, RE Input Low Voltage 0.8 Volts Applies to DE, DI, RE Input Current, Driver Input 0 µA Applies to DI Input Current, Control Lines µA Applies to DE, RE Driver Short Circuit Current VOUT = HIGH +/-250 mA -7V ≤ VO ≤ +12V VOUT = LOW +/-250 mA -7V ≤ VO ≤ +12V SP483E DRIVER AC Characteristics Max. Transmission Rate 250 kbps RE = 5V, DE = 5V; RDIFF = 54Ω, CL = CL2 = 00pF Driver Input to Output, tPLH 250 800 2000 ns See Figures 3 & 5, RDIFF = 54Ω, CL = CL2 = 00pF Driver Input to Output, tPHL 250 800 2000 ns See Figures 3 & 5, RDIFF = 54Ω, CL = CL2 = 00pF Driver Skew 00 800 ns See Figures 3 and 5, tSKEW = |tDPHL - tDPLH| Driver Rise or Fall Time 250 2000 ns From 0%-90%; RDIFF = 54Ω CL = CL2 = 00pF; See Figures 3 and 6 Output Voltages

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP483E_00_02092 PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP483E DRIVER (continued) AC Characteristics Driver Enable to Output High 250 2000 ns CL = 100pF, See Figures 4 and 6, S2 closed Driver Enable to Output Low 250 2000 ns CL = 100pF, See Figures 4 and 6, S closed Driver Disable Time from High 300 3000 ns CL = 15pF, See Figures 4 and 6, S2 closed Driver Disable Time from Low 300 3000 ns CL = 15pF, See Figures 4 and 6, S closed SP483E RECEIVER DC Characteristics Differential Input Threshold -0.2 +0.2 Volts -7V ≤ VCM ≤ +12V Input Hysteresis 20 mV VCM = 0V Output Voltage High 3.5 Volts IO = -4mA, VID = +200mV Output Voltage Low 0.4 Volts IO = +4mA, VID = +200mV Three-State ( High Impedance) Output Current +/- µA 0.4V ≤ VO ≤ 2.4V; RE = 5V Input Resistance 2 5 kΩ -7V ≤ VCM ≤ +12V Input Current (A, B); VIN = 2V +.0 mA DE = 0V, VCC = 0V or 5.25V, VIN = 2V Input Current (A, B); VIN = -7V -0.8 mA DE = 0V, VCC = 0V or 5.25V, VIN = -7V Short Circuit Current 7 95 mA 0V ≤ VO ≤ VCC SP483E RECEIVER AC Characteristics Max. Transmission Rate 250 kbps RE = 0V, DE = 0V Receiver Input to Output 250 2000 ns tPLH ; See Figures 3 & 7, RDIFF = 54Ω, CL = CL2 = 00pF Receiver Input to Output 250 2000 ns tPHL ; See Figures 3 & 7, RDIFF = 54Ω, CL = CL2 = 00pF Differential Receiver Skew |tPHL - tPLH| 00 ns RDIFF = 54Ω, CL = CL2 = 00pF, See Figures 3 and 7 Receiver Enable to Output Low 45 70 ns CRL = 15pF, Figures 2 & 8; S Closed Receiver Enable to Output High 45 70 ns CRL = 15pF, Figures 2 & 8; S2 Closed Receiver Disable from LOW 45 70 ns CRL = 15pF, Figures 2 & 8; S Closed Receiver Disable from High 45 70 ns CRL = 15pF, Figures 2 & 8; S2 Closed TMIN to TMAX and VCC = +5.0V +/-5% unless otherwise noted.

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP483E_00_02092 PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP483E Shutdown Timing Time to Shutdown 50 200 600 ns RE = 5V, DE = 0V Driver Enable from Shutdown to Output High 2000 ns CL = 100pF; See Figures 4 and 6; S2 Closed Driver Enable from Shutdown to Output Low 2000 ns CL = 100pF; See Figures 4 and 6; S Closed Receiver Enable from Shutdown to Output High 300 2500 ns CL = 15pF; See Figures 2 and 8; S2 Closed Receiver Enable from Shutdown to Output Low 300 2500 ns CL = 15pF; See Figures 2 and 8; S Closed POWER REQUIREMENTS Supply Voltage VCC +4.75 +5.25 Volts Supply Current No Load 900 µA RE, DI = 0V or VCC; DE = VCC 600 µA RE = 0V, DI = 0V or 5V; DE = 0V Shutdown Mode 0 µA DE = 0V, RE = VCC ENVIRONMENTAL AND MECHANICAL Operating Temperature Commercial (_C_) 0 70 ºC Industrial (_E_) -40 +85 ºC Storage Temperature -65 +50 ºC Package Plastic DIP (_P) NSOIC (_N) TMIN to TMAX and VCC = +5.0V +/-5% unless otherwise noted.

Figure 6. Driver Enable and Disable Times Figure 8. Receiver Enable and Disable Times Table 1. Transmit Function Truth Table

0 X Z

Table 2. Receive Function Truth Table Figure 7. Receiver Propagation Delays

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP483E_00_02092 The SP483E is a half-duplex differential transceiver that meets the requirements of RS-485 and RS-422. Fabricated with an Exar proprietary BiCMOS process, this product requires a fraction of the power of older bipolar designs. The RS-485 standard is ideal for multi-drop applications and for long-distance interfaces. RS-485 allows up to 32 drivers and 32 receiv- ers to be connected to a data bus, making it an ideal choice for multi-drop applications. Since the cabling can be as long as 4,000 feet, RS-485 transceivers are equipped with a wide (-7V to +12V) common mode range to accommodate ground potential differ - ences. Because RS-485 is a differential interface, data is virtually immune to noise in the transmission line. Drivers The driver outputs of the SP483E are dif - ferential outputs meeting the RS-485 and RS-422 standards. The typical voltage output swing with no load will be 0 Volts to +5 Volts. With worst case loading of 54Ω across the differential outputs, the drivers can maintain greater than 1.5V voltage levels. The drivers have an enable control line which is active HIGH. A logic HIGH on DE (pin 3) will enable the differential driver outputs. A logic LOW on the DE (pin 3) will tri-state the driver outputs. The SP483E has internally slew rate lim - ited driver outputs to minimize EMI. The maximum data rate for the SP483E drivers is 250kbps under load. Receivers The SP483E receivers have differential inputs with an input sensitivity as low as ±200mV. Input impedance of the receivers is typically 15kΩ (12kΩ minimum). A wide com- mon mode range of -7V to +12V allows for large ground potential differences between systems. The receivers have a tri-state en- able control pin. A logic LOW on RE (pin 2) will enable the receiver, a logic HIGH on RE (pin 2) will disable the receiver. The SP483E receiver is rated for data rates up to 250kbps. The receivers are equipped with the fail-safe feature. Fail- safe guarantees that the receiver output will be in a HIGH state when the input is left unconnected. Shutdown Mode The SP483E is equipped with a Shutdown mode. To enable the shutdown state, both driver and receiver must be disabled simul- taneously. A logic LOW on DE (pin 3) and a Logic HIGH on RE (pin 2) will put the SP483E into Shutdown mode. In Shutdown, supply current will drop to typically µA. ESD TOLERANCE The SP483E incorporates ruggedized ESD cells on all driver output and receiver input pins. The ESD structure is improved over our previous family for more rugged applications and environments sensitive to electro-static discharges and associated transients. The improved ESD tolerance is at least ±15kV without damage or latch-up. There are different methods of ESD testing applied: a) MIL-STD-883, Method 3015.7 b) IEC61000-4-2 Air-Discharge c) IEC61000-4-2 Direct Contact

before he or she even touches the system. will tend to change the discharge current. current varies with the approach speed. the PCB and finally to the IC. Figure 11. ESD Test Waveform for IEC61000-4-2 resistor, onto the device under test (DUT). to the test point when SW2 is switched on. the current charge onto the test point. Table 1. Transceiver ESD Tolerance levels

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP483E_00_02092

ORDERING INFORMATION

Model Temperature Range Package Types

REVISION HISTORY

2000 05 Legacy Sipex Datasheet 02/09/2 .0.0 Convert to Exar Format. Update ordering information. Change ESD specification to IEC6000-4-2. Notice EXAR Corporation reserves the right to make changes to any products contained in this publication in order to improve design, performance or reliabil- ity. EXAR Corporation assumes no representation that the circuits are free of patent infringement. Charts and schedules contained herein are only for illustration purposes and may vary depending upon a user's specific application. While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized ; (b) the user assumes all such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances. Copyright 2012 EXAR Corporation Datasheet February 2012 Send your serial transceiver technical questions with technical details to: serialtechsupport@exar.com Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited. Note: /TR = Tape and Reel

Product Information

SP483EEN-L specifications and overview.

Summary

Enhanced Low EMI Half-Duplex RS-485 Transceiver

Description

Enhanced Low EMI Half-Duplex RS-485 Transceiver

Source title SP483EEN-L Datasheet(PDF) - Exar Corporation

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