SP1485EEN

® PRELIMINARY SP1485E Enhanced Low Power Half-Duplex RS-485 Transceivers ■ +5V supply ■ Low Power BiCMOS ■ Driver/Receiver Enable for Multi-Drop configurations ■ Available in 8 Pin NSOIC or PDIP packages ■ Enhanced ESD Specifications: +15KV Human Body Model +15KV IEC1000-4-2 Air Discharge +8KV IEC1000-4-2 Contact Discharge RO 1 RE 2 DE 3 DI 4 8 VCC SP1485E 8 Pin - nSOIC 7B 6 A 5 GND DESCRIPTION The SP1485E is a half-duplex transceiver that meets the specifications of RS-485 and RS422 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 SP485 devices as well as popular industry standards. As with the original version, the SP1485E features Sipex's BiCMOS design allowing low power operation without sacrificing performance. The SP1485E meets the requirements of the RS-485 and RS-422 protocols up to 20Mbps under load. BLOCK DIAGRAM RO 1 RE 2 DE 3 DI 4 R 8 Vcc 7B 6A D SP1485E 5 GND Rev:C Date: 02/26/04 SP1485E Low Power Half-Duplex RS485 Transceivers © Copyright 2004 Sipex Corporation 1 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. VCC............................................................................................................+7V Input Voltages Logic........................................................-0.3V to (VCC+0.5V) Drivers..................................................-0.3V to (VCC+0.5V) Receivers................................................................. ±15V Output Voltages Logic........................................................-0.3V to (VCC+0.5V) Drivers...................................................................... ±15V Receivers............................................-0.3V to (VCC+0.5V) Storage Temperature.......................................................-65˚C to +150˚C Power Dissipation per Package 8-pin NSOIC (derate 6.60mW/oC above +70oC)...........................550mW 8-pin PDIP (derate 11.8mW/oC above +70oC)............................1000mW ELECTRICAL CHARACTERISTICS TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS SP1485E DRIVER DC Characteristics Differential Output Voltage Differential Output Voltage Differential Output Voltage Change in Magnitude of Driver Differential Output Voltage for Complimentary States Driver Common-Mode Output Voltage Input High Voltage Input Low Voltage Input Current Driver Short-Circuit Current VOUT = HIGH VOUT = LOW SP1485E DRIVER AC Characteristics Maximum Data Rate Driver Input to Output MIN. TYP. MAX. UNITS CONDITIONS 3.5 2 1.5 VCC VCC VCC 0.2 3 Volts Volts Volts Unloaded; R = ∞ ; see Figure 1 with load; R = 50Ω; (RS-422); see Figure 1 with load; R = 27Ω; (RS-485);see Figure 1 Volts Volts Volts Volts µA mA mA R = 27Ω or R = 50Ω; see Figure 1 R = 27Ω or R = 50Ω; see Figure 1 Applies to DE, DI, RE Applies to DE, DI, RE Applies to DE, DI, RE -7V ≤ VO ≤ +12V -7V ≤ VO ≤ +12V 2.0 0.8 ±10 ±250 ±250 20 10 10 30 40 Mbps ns ns 3 8 40 40 40 40 20 70 70 70 70 ns ns ns ns ns ns RE = 5V, DE = 5V; RDIFF = 54Ω, CL1 = CL2 = 100pF tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; see Figures 3 and 5 tPHL; RDIFF = 54Ω, CLI = CL2 = 100pF; Driver Skew Driver Rise or Fall Time Driver Enable to Output High Driver Enable to Output Low Driver Disable Time from Low Driver Disable Time from High see Figures 3 and 5, tSKEW = | tDPLH - tDPHL | From 10% to 90%; RDIFF = 54Ω, CL1 = CL2 = 100pF; see Figures 3 & 6 CL = 100pF; see Figures 4 & 6; S2 closed CL = 100pF; see Figures 4 & 6; S1 closed CL = 100pF; see Figures 4 & 6; S1 closed CL = 100pF; see Figures 4 & 6; S2 closed Rev:C Date: 02/26/04 SP1485E Low Power Half-Duplex RS485 Transceivers © Copyright 2004 Sipex Corporation 2 SPECIFICATIONS (continued) TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS MIN. SP1485E RECEIVER DC Characteristics Differential Input Threshold -0.2 Differential Input Threshold -0.4 (SP1485EMN ONLY) Input Hysteresis Output Voltage High 3.5 Output Voltage Low Three-State (High Impedance) Output Current Input Resistance 12 Input Current (A, B); VIN = 12V Input Current (A, B); VIN = -7V Short-Circuit Current 7 SP1485E RECEIVER AC Characteristics Maximum Data Rate 20 Receiver Input to Output 15 15 Diff. Receiver Skew ItPLH-tPHLI Receiver Enable to Output Low Receiver Enable to Output High Receiver Disable from Low Receiver Disable from High TYP. MAX. UNITS CONDITIONS +0.2 +0.4 20 0.4 ±1 15 +1.0 -0.8 95 Volts Volts mV Volts Volts µA kΩ mA mA mA -7V ≤ VCM ≤ +12V -7V ≤ VCM ≤ +12V VCM = 0V IO = -4mA, VID = +200mV IO = +4mA, VID = -200mV 0.4V ≤ VO ≤ 2.4V; RE = 5V -7V ≤ VCM ≤ +12V DE = 0V, VCC = 0V or 5.25V, VIN = 12V DE = 0V, VCC = 0V or 5.25V, VIN = -7V 0V ≤ VO ≤ VCC RE = 0V, DE = 0V tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 7 tPHL; RDIFF = 54Ω, CLI = CL2 = 100pF RDIFF = 54Ω; CL1 = CL2 = 100pF; Figures 3 & 7 CRL = 15pF; Figures 2 & 8; S1 closed CRL = 15pF; Figures 2 & 8; S2 closed CRL = 15pF; Figures 2 & 8; S1 closed CRL = 15pF; Figures 2 & 8; S2 closed 40 50 Mbps ns ns ns 5 10 45 45 45 45 70 70 70 70 ns ns ns ns POWER REQUIREMENTS Supply Voltage Supply Current SP1485E No Load +4.75 +5.25 Volts 900 600 µA µA RE, DI = 0V or VCC; DE = VCC RE = 0V, DI = 0V or 5V; DE = 0V ENVIRONMENTAL AND MECHANICAL Operating Temperature Commercial (_C_) Industrial (_E_) (_M_) Storage Temperature Package Plastic DIP (_P) NSOIC (_N) 0 -40 -40 -65 +70 +85 +125 +150 °C °C °C °C Rev:C Date: 02/26/04 SP1485E Low Power Half-Duplex RS485 Transceivers © Copyright 2004 Sipex Corporation 3 PIN FUNCTION RO 1 R 8 VCC Pin 1 – RO – Receiver Output. Pin 2 – RE – Receiver Output Enable Active LOW. RE 2 7 B Pin 3 – DE – Driver Output Enable Active HIGH. Pin 4 – DI – Driver Input. Pin 5 – GND – Ground Connection. DE 3 6 A D DI 4 SP485 Top View 5 GND Pin 6 – A – Driver Output/Receiver Input Non-inverting. Pin 7 – B – Driver Output/Receiver Input Inverting. Pin 8 – Vcc – Positive Supply 4.75V