SP483EEP

SP483E_05 SIPEX | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 11

Technical content

SP483EDS/05 SP483E Low EMI Half-Duplex RS485 Transceiver © Copyright 2000 Sipex Corporation SP483E n +5V Only n Low Power BiCMOS n Driver/Receiver Enable for Multi-Drop configurations n Enhanced ESD Specifications: +15KV Human Body Model +15KV IEC1000-4-2 Air Discharge +8KV IEC1000-4-2 Contact Discharge n Low EMI Transceiver limited to 250kbps Enhanced Low EMI Half-Duplex RS-485 Transceiver R D RO 1 RE 2 DE 3 DI 4

8 Vcc

5 GND

DESCRIPTION

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 this device to over ±15kV for both Human Body Model and IEC1000-4-2 Air Discharge Method. This device is pin-to-pin compatible with Sipex's SP483 device as well as popular industry standards. As with the original version, the SP483E features Sipex's BiCMOS design allowing low power operation without sacrificing performance. The SP483E meet the requirements of the RS-485 and RS-422 protocols up to 250kbps under load. 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. Now Available in Lead Free Packaging

SP483EDS/05 SP483E Low EMI Half-Duplex RS485 Transceiver © Copyright 2000 Sipex Corporation SPECIFICATIONS TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP483E DRIVER DC Characteristics Differential Output Voltage GND V CC Volts Unloaded; R = ∞ ; see Figure 1 Differential Output Voltage 2 V CC Volts with load; R = 50Ω ; (RS-422); see Figure 1 Differential Output Voltage 1.5 V CC 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 = 27 Ω or R = 50Ω ; see Figure 1 Driver Common-Mode Output Voltage 3 Volts R = 27 Ω 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 Applies to DE, DI, RE Driver Input 10 µA DI Control Lines 1µA DE, RE Driver Short-Circuit Current V OUT = HIGH ±250 mA -7V ≤ VO ≤ +12V VOUT = LOW ±250 mA -7V ≤ VO ≤ +12V SP483E DRIVER AC Characteristics Maximum Data Rate 250 Kbps RE = 5V, DE = 5V; R DIFF = 54Ω , C L1 = CL2 = 100pF Driver Input to Output 250 800 2000 ns t PLH ; RDIFF = 54Ω , CL1 = CL2 = 100pF; see Figures 3 and 5 Driver Input to Output 250 800 2000 ns t PHL ; RDIFF = 54Ω , CL1 = CL2 = 100pF; see Figures 3 and 5 Driver Skew 100 800 ns see Figures 3 and 5, tSKEW = | tDPLH - tDPHL | Driver Rise or Fall Time 250 2000 ns From 10% to 90%; R DIFF = 54Ω , C L1 = CL2 = 100pF; see Figures 3 and 6 Driver Enable to Output High 250 2000 ns C L = 100pF; see Figures 4 & 6; S2 closed Driver Enable to Output Low 250 2000 ns C L = 100pF; see Figures 4 & 6; S1 closed Driver Disable Time from Low 300 3000 ns C L = 15pF; see Figures 2 & 8; S1 closed Driver Disable Time from High 300 3000 ns C L = 15pF; see Figures 2 & 8; S2 closed SP481E/SP485 E RECEIVER DC Characteristics Differential Input Threshold -0.2 +0.2 Volts -7V ≤ VCM ≤ +12V Input Hysteresis 20 mV V CM = 0V Output Voltage High 3.5 Volts I O = -4mA, VID = +200mV Output Voltage Low 0.4 Volts I O = +4mA, VID = -200mV Three-State (High Impedance) Output Current ±1 µA 0.4V ≤ V O ≤ 2.4V; RE = 5V Input Resistance 12 15 k Ω -7V ≤ VCM ≤ +12V Input Current (A, B); VIN = 12V +1.0 mA DE = 0V, V CC = 0V or 5.25V, VIN = 12V Input Current (A, B); VIN = -7V -0.8 mA DE = 0V, V CC = 0V or 5.25V, VIN = -7V Short-Circuit Current 7 95 mA 0V ≤ VCM ≤ VCC 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. V Input Voltages Output Voltages

SP483EDS/05 SP483E Low EMI Half-Duplex RS485 Transceiver © Copyright 2000 Sipex Corporation SPECIFICATIONS (continued) TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP483E RECEIVER AC Characteristics Maximum Data Rate 250 Kbps RE = 0V, DE = 0V Receiver Input to Output 250 2000 ns t PLH ; RDIFF = 54Ω , C L1 = CL2 = 100pF; Figures 3 & 7 Receiver Input to Output 250 2000 ns t PHL ; RDIFF = 54Ω , C L1 = CL2 = 100pF; Figures 3 & 7 Diff. Receiver Skew ItPLH -tPHL I 100 ns R DIFF = 54Ω ; CL1 = CL2 = 100pF; Figures 3 & 7 Receiver Enable to Output Low 45 70 ns C RL = 15pF; Figures 2 & 8; S1 closed Receiver Enable to Output High 45 70 ns C RL = 15pF; Figures 2 & 8; S2 closed Receiver Disable from Low 45 70 ns C RL = 15pF; Figures 2 & 8; S1 closed Receiver Disable from High 45 70 ns C RL = 15pF; Figures 2 & 8; S2 closed SP483E Shutdown Timing Time to Shutdown 50 200 600 ns RE = 5V, DE = 0V Driver Enable from Shutdown to Output High 2000 ns C L = 100pF; See Figures 4 & 6; S2 closed Driver Enable from Shutdown to Output Low 2000 ns C L = 100pF; See Figures 4 & 6; S1 closed Receiver Enable from Shutdown to Output High 300 2500 ns C L = 15pF; See Figures 2 & 8; S2 closed Receiver Enable from Shutdown to Output Low 300 2500 ns C L = 15pF; See Figures 2 & 8; S1 closed POWER REQUIREMENTS Supply Voltage +4.75 +5.25 Volts Supply Current SP483E No Load 900 µA RE = 0V, DI = 0V or V CC ; DE = VCC 600 µA RE = 0V, DI = 0V or 5V; DE = 0V SP483E Shutdown Mode 10 µA DE = 0V, RE=V CC ENVIRONMENTAL AND MECHANICAL Operating Temperature Commercial (_C_) 0 +70 °C Industrial (_E_) -40 +85 °C Storage Temperature -65 +150 °C Package Plastic DIP (_P) NSOIC (_N)

Pin 1 – RO – Receiver Output. Pin 2 – RE – Receiver Output Enable Active LOW. Pin 3 – DE – Driver Output Enable Active HIGH. Pin 5 – GND – Ground Connection. Pin 7 – B – Driver Output/Receiver Input Inverting. Pin 8 – Vcc – Positive Supply 4.75V<Vcc< 5.25V. Figure 5. Driver Propagation Delays Figure 1. RS-485 Driver DC Test Load Circuit Figure 2. Receiver Timing Test Load Circuit Figure 3. RS-485 Driver/Receiver Timing Test CircuitFigure 4. RS-485 Driver Timing Test Load #2 Circuit

10 X Z

Table 1. Transmit Function Truth Table Table 2. Receive Function Truth Table Figure 8. Receiver Enable and Disable Times Figure 7. Receiver Propagation Delays Figure 6. Driver Enable and Disable Times

SP483EDS/05 SP483E Low EMI Half-Duplex RS485 Transceiver © Copyright 2000 Sipex Corporation 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 common mode range of -7V to +12V allows for large ground potential differences between systems. The receivers have a tri-state enable 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 250 Kbps. 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 the driver and receiver must be disabled simultaneously. 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 1µA. ESD TOLERANCE... The SP483E device 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 nor latch-up. There are different methods of ESD testing applied: a) MIL-STD-883, Method 3015.7 b) IEC1000-4-2 Air-Discharge c) IEC1000-4-2 Direct Contact DESCRIPTION... The SP483E is a half-duplex differential transceiver that meets the requirements of RS-485 and RS-422. Fabricated with a Sipex proprietary BiCMOS process, the SP483E 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 receivers 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 differences. 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 differential outputs meeting the RS-485 and RS-422 stan- dards. 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 volt- age 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 DE (pin 3) will tri-state the driver outputs. The SP483E has internally slew rate limited driver outputs to minimize EMI. The maximum data rate for the SP483E drivers is 250 Kbps under load.

system before he or she even touches the system. power supply when the first switch (SW1) is on. receives a duration of voltage. capacitor (CS) are 330Ω an 150pF, respectively. Figure 11. ESD Test Waveform for IEC1000-4-2 Table 1. Transceiver ESD Tolerance Levels

SP483EDS/05 SP483E Low EMI Half-Duplex RS485 Transceiver © Copyright 2000 Sipex Corporation D ALTERNATE END PINS (BOTH ENDS) D1 = 0.005" min. (0.127 min.) E PACKAGE: PLASTIC DUAL–IN–LINE (NARROW) DIMENSIONS (Inches) Minimum/Maximum (mm) A = 0.210" max. (5.334 max). C ØL A1 = 0.015" min. (0.381min.) B e = 0.100 BSC (2.540 BSC) eA = 0.300 BSC (7.620 BSC) B C D E L Ø 0.115/0.195 (2.921/4.953) 0.014/0.022 (0.356/0.559) 0.045/0.070 (1.143/1.778) 0.008/0.014 (0.203/0.356) 0.355/0.400 (9.017/10.160) 0.300/0.325 (7.620/8.255) 0.240/0.280 (6.096/7.112) 0.115/0.150 (2.921/3.810) 0°/ 15° (0°/15°) 8–PIN

SP483EDS/05 SP483E Low EMI Half-Duplex RS485 Transceiver © Copyright 2000 Sipex Corporation D EH PACKAGE: PLASTIC SMALL OUTLINE (SOIC) (NARROW) DIMENSIONS (Inches) Minimum/Maximum (mm) 8–PIN A Ø LBe h x 45° A B D E e H h L Ø 0.053/0.069 (1.346/1.748) 0.004/0.010 (0.102/0.249 0.014/0.019 (0.35/0.49) 0.189/0.197 (4.80/5.00) 0.150/0.157 (3.802/3.988)

0.050 BSC

(1.270 BSC) 0.228/0.244 (5.801/6.198) 0.010/0.020 (0.254/0.498) 0.016/0.050 (0.406/1.270) 0°/8° (0°/8°)

SP483EDS/05 SP483E Low EMI Half-Duplex RS485 Transceiver © Copyright 2000 Sipex Corporation

ORDERING INFORMATION

Model Temperature Range Package Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others. Corporation SIGNAL PROCESSING EXCELLENCE Please consult the factory for pricing and availability on a Tape-On-Reel option. Sipex Corporation Headquarters and Sales Office

22 Linnell Circle

Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com Sales Office

233 South Hillview Drive

Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 Available in lead free packaging. To order, add "-L" suffix to the part number. Example: SP483ECN = standard; SP483ECN -L = lead free.