SP1481E

SP1481E/SP1485E Enhanced Low Power Half-Duplex RS-485 Transceivers ■ +5V Only ■ Low Power BiCMOS ■ Driver/Receiver Enable for Multi-Drop configurations ■ Low Power Shutdown Mode (SP48E) ■ 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 R 8 VCC 7B 6A D 5 GND Now Available in Lead Free Packaging description The SP1481E and the SP1485E 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 Exar's SP481 and SP485 devices as well as popular industry standards. As with the original versions, the SP1481E and the SP1485E feature Exar's BiCMOS design allowing low power operation without sacrificing performance. The SP1481E and SP1485E meet the requirements of the RS-485 and RS-422 protocols up to 20Mbps under load. The SP1481E is equipped with a low power Shutdown mode. Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP48E-485E_00_06609  ABsoLUte MAXiMUM rAtinGs Output Voltages 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 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 eLectricAL cHArActeristics TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. pArAMeters sp1481e/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 sp1481e/sp1485e driver Ac characteristics Maximum Data Rate Driver Input to Output Driver Input to Output (SP1485EMN ONLY) Driver Input to Output Driver Input to Output (SP1485EMN ONLY) 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 Min. tYp. MAX. Units conditions 3.5 2 1.5 2.0 VCC VCC VCC 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 0.2 3 0.8 ±10 ±250 ±250 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 20 20 20 20 20 3 8 40 40 40 40 30 40 30 40 5 20 70 70 70 70 Mbps ns ns ns ns ns ns ns ns ns ns RE = 5V, DE = 5V; RDIFF = 54Ω, CL1 = CL2 = 00pF tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; see Figures 3 and 5 tPLH; RDIFF = 54Ω, CLI = CL2 = 100pF; See Figures 3 and 5 tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF; see Figures 3 and 5 tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF; see Figures 3 and 5 see Figures 3 and 5, tSKEW = | tPLH - tPHL | 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; S closed CL = 100pF; see Figures 4 & 6; S closed CL = 100pF; see Figures 4 & 6; S2 closed Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP48E-485E_00_06609 2 TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted pArAMeters sp1481e/sp1485e receiver dc characteristics Differential Input Threshold Differential Input Threshold (SP1485EMN ONLY) Input Hysteresis Output Voltage High Output Voltage Low Three-State (High Impedance) Output Current Input Resistance Input Current (A, B); VIN = 12V Input Current (A, B); VIN = -7V 12 15 ±1 +1.0 -0.8 95 µA kΩ mA mA mA 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 3.5 20 0.4 mV Volts Volts VCM = 0V IO = -4mA, VID = +200mV IO = +4mA, VID = -200mV -0.2 -0.4 +0.2 +0.4 Volts Volts -7V ≤ VCM ≤ +12V -7V ≤ VCM ≤ +12V Min. tYp. MAX. Units conditions speciFicAtions (continued) Short-Circuit Current 7 sp1481e/sp1485e receiver Ac characteristics Maximum Data Rate Receiver Input to Output Receiver Input to Output Diff. Receiver Skew ItPLH-tPHLI Receiver Enable to Output Low Receiver Enable to Output High Receiver Disable from Low sp1481e shutdown timing Time to Shutdown Driver Enable from Shutdown to Output High Driver Enable from Shutdown to Output Low Receiver Enable from Shutdown to Output High Receiver Enable from Shutdown to Output Low poWer reQUireMents Supply Voltage Supply Current SP1481E/1485E No Load SP48E Shutdown Mode environMentAL And MecHAnicAL Operating Temperature Commercial (_C_) Industrial (_E_) (_M_) Storage Temperature Package NSOIC (_N) 0 -40 -40 -65 +4.75 50 20 25 25 5 45 45 45 70 70 10 70 70 70 70 Mbps ns ns ns ns ns ns ns RE = 0V, DE = 0V tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 7 tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 7 RDIFF = 54Ω; CL1 = CL2 = 100pF; Figures 3 & 7 CRL = 15pF; Figures 2 & 8; S closed CRL = 15pF; Figures 2 & 8; S2 closed CRL = 15pF; Figures 2 & 8; S closed CRL = 15pF; Figures 2 & 8; S2 closed Receiver Disable from High 45 200 40 40 300 300 900 600 600 100 100 1000 1000 +5.25 10 ns ns ns ns ns Volts μA μA μA RE = 5V, DE = 0V CL = 100pF; See Figures 4 & 6; S2 closed CL = 100pF; See Figures 4 & 6; S closed CL = 15pF; See Figures 2 & 8; S2 closed CL = 15pF; See Figures 2 & 8; S closed RE, DI = 0V or VCC; DE = VCC RE = 0V, DI = 0V or 5V; DE = 0V DE = 0V, RE=VCC +70 +85 +125 +150 °C °C °C °C Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP48E-485E_00_06609 3 pin FUnction RO 1 RE 2 DE 3 DI 4 R 8 7 6 VCC B A GND Pin 1 – RO – Receiver Output. Pin 2 – RE – Receiver Output Enable Active LOW. Pin 3 – DE – Driver Output Enable Active HIGH. Pin 4 – DI – Driver Input. Pin 5 – GND – Ground Connection. D SP485 Top View 5 Pin 6 – A – Driver Output/Receiver Input Non-inverting. Pin 7 – B – Driver Output/Receiver Input Inverting. Pin 8 – Vcc – Positive Supply 4.75V