SP485ECN

SP481E SIPEX | Alldatasheet

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Rev. 5/16/03 SP481E Low Power Half-Duplex RS485 Transceivers © Copyright 2003 Sipex Corporation SP481E/SP485E ■ +5V Only ■ Low Power BiCMOS ■ Driver/Receiver Enable for Multi-Drop configurations ■ Low Power Shutdown Mode (SP481E) ■ Enhanced ESD Specifications:

DESCRIPTION

The SP481E and the SP485E are a family of half-duplex transceivers that meet 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 IEC1000-4-2 Air Discharge Method. These devices are pin-to-pin compatible with Sipex's SP481 and SP485 devices as well as popular industry standards. As with the original versions, the SP481E and the SP485E feature Sipex's BiCMOS design allowing low power operation without sacrificing performance. The SP481E and SP485E meet the requirements of the RS-485 and RS-422 protocols up to 10Mbps under load. The SP481E is equipped with a low power Shutdown mode. +15KV Human Body Model +15KV IEC1000-4-2 Air Discharge +8KV IEC1000-4-2 Contact Discharge Enhanced Low Power Half-Duplex RS-485 Transceivers R D RO 1 RE 2 DE 3 DI 4

8 Vcc

5 GND

Rev. 5/16/03 SP481E Low Power Half-Duplex RS485 Transceivers © Copyright 2003 Sipex Corporation 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 SPECIFICATIONS TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP481E/SP485E 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 = 50 Ω; (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 ±10 µA Applies to DE, DI, RE Driver Short-Circuit Current VOUT = HIGH ±250 mA -7V ≤ VO ≤ +12V VOUT = LOW ±250 mA -7V ≤ VO ≤ +12V SP481E/SP485E DRIVER AC Characteristics Maximum Data Rate 10 Mbps RE = 5V, DE = 5V; R DIFF = 54Ω, CL1 = CL2 = 100pF Driver Input to Output 20 30 60 ns t PLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; see Figures 3 and 5 Driver Input to Output 20 30 80 ns t PLH; RDIFF = 54Ω, CLI = CL2 = 100pF; (SP485EMN ONLY) See Figures 3 and 5 Driver Input to Output 20 30 60 ns t PHL; RDIFF = 54Ω, CL1 = CL2 = 100pF; see Figures 3 and 5 Driver Input to Output 20 30 80 ns t PHL; RDIFF = 54Ω, CL1 = CL2 = 100pF; (SP485EMN ONLY) see Figures 3 and 5 Driver Skew 5 10 ns see Figures 3 and 5, tSKEW = | tDPLH - tDPHL | Driver Rise or Fall Time 3 15 40 ns From 10% to 90%; R DIFF = 54Ω, CL1 = CL2 = 100pF; see Figures 3 & 6 Driver Enable to Output High 40 70 ns C L = 100pF; see Figures 4 & 6; S2 closed Driver Enable to Output Low 40 70 ns C L = 100pF; see Figures 4 & 6; S1 closed Driver Disable Time from Low 40 70 ns C L = 100pF; see Figures 4 & 6; S1 closed Driver Disable Time from High 40 70 ns C L = 100pF; see Figures 4 & 6; S2 closed Output Voltages Power Dissipation per Package 8-pin NSOIC (derate 6.60mW/

Rev. 5/16/03 SP481E Low Power Half-Duplex RS485 Transceivers © Copyright 2003 Sipex Corporation SPECIFICATIONS (continued) TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP481E/SP485E RECEIVER DC Characteristics Differential Input Threshold -0.2 +0.2 Volts -7V ≤ VCM ≤ +12V Differential Input Threshold -0.4 +0.4 Volts -7V ≤ VCM ≤ +12V (SP485EMN ONLY) 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 ≤ VO ≤ 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 ≤ VO ≤ VCC SP481E/SP485E RECEIVER AC Characteristics Maximum Data Rate 10 Mbps RE = 0V, DE = 0V Receiver Input to Output 20 45 100 ns t PLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 7 Receiver Input to Output 20 45 100 ns t PHL; RDIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 7 Diff. Receiver Skew ItPLH-tPHLI1 3 n s 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 SP481E Shutdown Timing Time to Shutdown 50 200 600 ns RE = 5V, DE = 0V Driver Enable from Shutdown to Output High 40 100 ns C L = 100pF; See Figures 4 & 6; S2 closed Driver Enable from Shutdown to Output Low 40 100 ns C L = 100pF; See Figures 4 & 6; S1 closed Receiver Enable from Shutdown to Output High 300 1000 ns C L = 15pF; See Figures 2 & 8; S2 closed Receiver Enable from Shutdown to Output Low 300 1000 ns C L = 15pF; See Figures 2 & 8; S1 closed POWER REQUIREMENTS Supply Voltage +4.75 +5.25 Volts Supply Current SP481E/485E No Load 900 µA RE, DI = 0V or VCC; DE = VCC 600 µA RE = 0V, DI = 0V or 5V; DE = 0V SP481E Shutdown Mode 10 µA DE = 0V, RE=VCC ENVIRONMENTAL AND MECHANICAL Operating Temperature Commercial (_C_) 0 +70 °C Industrial (_E_) -40 +85 °C (_M_) -40 +125 °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 Circuit Figure 4. RS-485 Driver Timing Test Load #2 Circuit

00 Inputs Open 1

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

Rev. 5/16/03 SP481E Low Power Half-Duplex RS485 Transceivers © Copyright 2003 Sipex Corporation Receivers The SP481E and SP485E receivers have differ- ential 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 of the SP481E and SP485E 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 receiver for the SP481E and SP485E will operate up to at least 10Mbps. The receiver for each of the two devices is 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 SP481E The SP481E 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 SP481E into Shutdown mode. In Shutdown, supply current will drop to typically 1µA. ESD TOLERANCE The SP481E Family 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 dis- charges 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 The SP481E and SP485E are half-duplex differ- ential transceivers that meet the requirements of RS-485 and RS-422. Fabricated with a Sipex proprietary BiCMOS process, all three products require 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 SP481E and SP485E are differential 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 differ- ential outputs, the drivers can maintain greater than 1.5V voltage levels. The drivers of the SP481E, and SP485E 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 transmitters of the SP481E and SP485E will operate up to at least 10Mbps.

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 9. ESD Test Waveform for IEC1000-4-2

Rev. 5/16/03 SP481E Low Power Half-Duplex RS485 Transceivers © Copyright 2003 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

Rev. 5/16/03 SP481E Low Power Half-Duplex RS485 Transceivers © Copyright 2003 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°)

Rev. 5/16/03 SP481E Low Power Half-Duplex RS485 Transceivers © Copyright 2003 Sipex Corporation

ORDERING INFORMATION

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

233 South Hillview Drive

Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 Sales Office

22 Linnell Circle

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