SP485EN

SP481/SP483/SP485 Low Power Half-Duplex RS-485 Transceivers ■ ■ ■ ■ +5V Only Low Power BiCMOS Driver/Receiver Enable Slew Rate Limited Driver for Low EMI (SP483) ■ Low Power Shutdown Mode (SP481 and SP483) ■ RS-485 and RS-422 Drivers/Receivers DESCRIPTION The SP481, SP483, and the SP485 are a family of half-duplex transceivers that meet the requirements of RS-485 and RS-422. Their BiCMOS design allows low power operation without sacrificing performance. The SP481 and SP485 meet the requirements of RS-485 and RS-422 up to 5Mbps. Additionally, the SP481 is equipped with a low power Shutdown mode. The SP483 is internally slew rate limited to reduce EMI and can meet the requirements of RS-485 and RS-422 up to 250kbps. The SP483 is also equipped with a low power Shutdown mode. RO 1 RE 2 DE 3 DI 4 R 8 Vcc 7B 6A D SP481, SP483, and SP485 5 GND Rev. 07/16/02 SP481/483/485 Low Power Half-Duplex RS485 Transceivers © Copyright 2002 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............................................................................................................±12V 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...........................................................................500mW SPECIFICATIONS TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS SP481/SP483/SP485 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 SP481/SP485 DRIVER AC Characteristics Maximum Data Rate Driver Input to Output Driver Input to Output 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 GND 2 1.5 VCC VCC VCC 0.2 3 Volts Volts Volts Volts Volts Volts Volts µA mA mA Unloaded; R = ∞ ; see figure 1 with load; R = 50Ω; (RS422); see figure 1 with load; R = 27Ω; (RS485); see figure 1 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 35 35 250 250 5 20 20 30 30 5 60 60 10 40 70 70 70 70 Mbps ns ns ns ns ns ns ns ns 3 15 40 40 40 40 RE = 5V, DE = 5V tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 and 6 tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 and 6 see figures 3 and 6, tSKEW = | tDPLH - tDPHL | From 10% to 90%; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 and 6 CL = 100pF; see figures 4 & 7; S2 closed CL = 100pF; see figures 4 & 7; S1 closed CL = 15pF; see figures 2 & 9; S1 closed CL = 15pF; see figures 2 & 9; S2 closed SP481/SP483/SP485 RECEIVER DC Characteristics Differential Input Threshold -0.2 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 +0.2 10 0.4 ±1 15 +1.0 -0.8 95 Volts mV Volts Volts µA kΩ mA mA mA -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 ≤ VCM ≤ VCC Rev. 07/16/02 SP481/483/485 Low Power Half-Duplex RS485 Transceivers © Copyright 2002 Sipex Corporation 2 SPECIFICATIONS (continued) TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS SP481/SP485 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 Receiver Disable from High SP481 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 SP481/485 No Load SP483 No Load SP481/SP483 Shutdown Mode ENVIRONMENTAL AND MECHANICAL Operating Temperature Commercial (_C_) Industrial (_E_) Storage Temperature Package Plastic DIP (_S) NSOIC (_N) MIN. TYP. MAX. UNITS CONDITIONS 5 60 60 90 90 13 20 20 20 20 200 200 Mbps ns ns ns RE = 0V, DE = 0V tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 8 tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 8 RDIFF = 54Ω; CL1 = CL2 = 100pF; Figures 3 & 8 CRL = 15pF; Figures 2 & 9; S1 closed CRL = 15pF; Figures 2 & 9; S2 closed CRL = 15pF; Figures 2 & 9; S1 closed CRL = 15pF; Figures 2 & 9; S2 closed 50 50 50 50 ns ns ns ns 50 200 40 40 300 300 600 100 100 1000 1000 ns ns ns ns ns RE = 5V, DE = 0V CL = 100pF; See figures 4 & 7; S2 closed CL = 100pF; See figures 4 & 7; S1 closed CL = 15pF; See figures 2 & 9; S2 closed CL = 15pF; See figures 2 & 9; S1 closed +4.75 900 600 +5.25 Volts µA µA µA µA RE, DI = 0V or VCC; DE = VCC RE = 0V, DI = 0V or 5V; DE = 0V RE, DI = 0V or VCC; DE = VCC RE=0V, DI = 0V or 5V; DE = 0V DE = 0V, RE=VCC 10 µA 0 -40 -65 +70 +85 +150 °C °C °C Rev. 07/16/02 SP481/483/485 Low Power Half-Duplex RS485 Transceivers © Copyright 2002 Sipex Corporation 3 SP483 AC SPECIFICATIONS TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS SP483 DRIVER AC Characteristics Maximum Data Rate Driver Input to Output Driver Skew Driver Rise and Fall Time MIN. TYP. MAX. UNITS CONDITIONS 250 250 250 800 800 100 2000 2000 800 2000 2000 2000 3000 3000 kbps ns ns ns ns ns ns ns ns tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 & 6 tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 & 6 see figures 3 & 6, tSKEW = |tDPLH - tDPHL| 250 Driver Enable to Output High Driver Enable to Output Low Driver Disable Time from Low Driver Disable Time from High SP483 RECEIVER AC Characteristics Maximum Data Rate Receiver Input to Output Diff. Receiver Skew ItPLH-tPHLI Receiver Enable to Output Low Receiver Enable to Output High Receiver Disable from Low Receiver Disable from High SP483 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 250 250 300 300 From 10% to 90%; RDIFF = 54Ω, CL1 = CL2 = 100pF, see figures 3 & 6 CL = 100pF; See figures 4 & 7; S2 closed CL = 100pF; See figures 4 & 7; S1 closed CL = 15pF; See figures 4 & 7; S1 closed CL = 15pF; See figures 4 & 7; S2 closed 250 250 100 20 20 20 20 2000 kbps ns ns tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 8 RDIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 8 CRL = 15pF; Figures 2 & 9; S1 closed CRL = 15pF; Figures 2 & 9; S2 closed CRL = 15pF; Figures 2 & 9; S1 closed CRL = 15pF; Figures 2 & 9; S2 closed 50 50 50 50 ns ns ns ns 50 200 600 2000 2000 2500 2500 ns ns ns ns ns RE = 5V, DE = 0V CL = 100pF; See figures 4 & 7; S2 closed CL = 100pF; See figures 4 & 7; S1 closed CL = 15pF; See figures 4 & 7; S2 closed CL = 15pF; See figures 4 & 7; S1 closed RO 1 R 8 VCC PIN FUNCTION Pin# Name Description 1 2 3 RO RE DE DI GND A B Vcc Receiver Output. Receiver Output Enable Active LOW. Driver Output Enable Active HIGH. Driver Input. Ground Connection. Driver Output/Receiver Input Non-inverting. Driver Output/Receiver Input Inverting. Positive Supply 4.75V