SP481/SP483/SP485 Low Power Half-Duplex RS-485 Transceivers FEATURES ■ +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 R 8 VCC RE 2 7 B DE 3 6 A 5 GND RO 1 D DI 4 SP485 Top View SP481, SP483, SP485 Pinout (Top View) 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 R 8 Vcc RE 2 7 B DE 3 6 A DI 4 D 5 GND SP481, SP483, and SP485 Rev. 07/28/04 SP481/483/485 Low Power Half-Duplex RS485 Transceivers 1 © Copyright 2002 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. 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 ELECTRICAL CHARACTERISTICS TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS SP481/SP483/SP485 DRIVER DC Characteristics Differential Output Voltage Differential Output Voltage MAX. UNITS CONDITIONS GND 2 VCC VCC Volts Volts 1.5 VCC Volts Unloaded; R = ∞ ; see figure 1 with load; R = 50Ω; (RS422); see figure 1 with load; R = 27Ω; (RS485); see figure 1 0.2 Volts R = 27Ω or R = 50Ω; see figure 1 3 0.8 ±10 Volts Volts Volts µA R = 27Ω or R = 50Ω; see figure 1 Applies to DE, DI, RE Applies to DE, DI, RE Applies to DE, DI, RE 250 250 mA mA -7V ≤ VO ≤ +12V -7V ≤ VO ≤ +12V 30 60 Mbps ns Driver Input to Output 30 60 ns Driver Skew 5 10 ns Driver Rise or Fall Time 15 40 ns Driver Enable to Output High Driver Enable to Output Low Driver Disable Time from Low Driver Disable Time from High 40 40 40 40 70 70 70 70 ns ns ns ns 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 +0.2 Volts mV Volts Volts -7V ≤ VCM ≤ +12V VCM = 0V IO = -4mA,VID = +200mV IO = +4mA,VID = -200mV 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 ≤ VCM ≤ VCC 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 MIN. 2.0 35 35 5 SP481/SP483/SP485 RECEIVER DC Characteristics Differential Input Threshold Input Hysteresis Output Voltage High 2.4 Output Voltage Low 0.0 Three-State (High Impedance) Output Current Input Resistance Input Current (A, B); VIN = 12V Input Current (A, B); VIN = -7V Short-Circuit Current Rev. 07/28/04 TYP. 10 5 0.4 ±1 15 +1.0 -0.8 95 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 SP481/483/485 Low Power Half-Duplex RS485 Transceivers 2 © Copyright 2002 Sipex Corporation ELECTRICAL CHARACTERISTICS TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS SP481/SP485 RECEIVER MIN. TYP. MAX. UNITS CONDITIONS AC Characteristics Maximum Data Rate Receiver Input to Output 5 60 90 200 Mbps ns Receiver Input to Output 60 90 200 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; Diff. Receiver Skew ItPLH-tPHLI 13 ns Figures 3 & 8 Receiver Enable to Output Low Receiver Enable to Output High Receiver Disable from Low Receiver Disable from High 20 50 ns CRL = 15pF; Figures 2 & 9; S1 closed 20 20 20 50 50 50 ns ns ns CRL = 15pF; Figures 2 & 9; S2 closed CRL = 15pF; Figures 2 & 9; S1 closed CRL = 15pF; Figures 2 & 9; S2 closed 200 600 ns RE = 5V, DE = 0V 40 100 ns CL = 100pF; See figures 4 & 7; S2 closed 40 100 ns CL = 100pF; See figures 4 & 7; S1 closed 300 1000 ns CL = 15pF; See figures 2 & 9; S2 closed 300 1000 ns CL = 15pF; See figures 2 & 9; S1 closed +5.25 Volts 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 50 +4.75 SP483 No Load SP481/SP483 Shutdown Mode ENVIRONMENTAL AND MECHANICAL Operating Temperature Commercial (_C_) Industrial (_E_) Storage Temperature Package Plastic DIP (_S) NSOIC (_N) Rev. 07/28/04 0 -40 -65 900 µA µA RE, DI = 0V or VCC; DE = VCC RE = 0V, DI = 0V or 5V; DE = 0V 600 µA µA RE, DI = 0V or VCC; DE = VCC RE=0V, DI = 0V or 5V; DE = 0V 10 µA DE = 0V, RE=VCC +70 +85 +150 °C °C °C SP481/483/485 Low Power Half-Duplex RS485 Transceivers 3 © Copyright 2002 Sipex Corporation 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 MIN. TYP. MAX. UNITS CONDITIONS 250 250 800 2000 kbps ns tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; Driver Skew 250 800 2000 ns tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF; 100 800 ns 250 2000 ns Driver Enable to Output High Driver Enable to Output Low Driver Disable Time from Low Driver Disable Time from High 250 250 300 300 2000 2000 3000 3000 ns ns ns ns SP483 RECEIVER AC Characteristics Maximum Data Rate Receiver Input to Output 250 250 2000 kbps ns see figures 3 & 6 Driver Rise and Fall Time see figures 3 & 6 see figures 3 & 6, tSKEW = |tDPLH - tDPHL| 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 tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 8 Diff. Receiver Skew ItPLH-tPHLI 100 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 50 R 8 VCC RE 2 7 B DE 3 6 A 5 GND DI 4 D SP485 20 50 ns CRL = 15pF; Figures 2 & 9; S1 closed 20 20 20 50 50 50 ns ns ns CRL = 15pF; Figures 2 & 9; S2 closed CRL = 15pF; Figures 2 & 9; S1 closed CRL = 15pF; Figures 2 & 9; S2 closed 200 600 ns RE = 5V, DE = 0V 2000 ns CL = 100pF; See figures 4 & 7; S2 closed 2000 ns CL = 100pF; See figures 4 & 7; S1 closed 2500 ns CL = 15pF; See figures 4 & 7; S2 closed 2500 ns CL = 15pF; See figures 4 & 7; S1 closed PIN FUNCTION Pin# Name Description Top View SP481, SP483, SP485 Pinout (Top View) Rev. 07/16/02 RDIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 8 Receiver Enable to Output Low Receiver Enable to Output High Receiver Disable from Low Receiver Disable from High RO 1 ns 1 2 RO RE 3 DE 4 5 6 DI GND A 7 B 8 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<Vcc< 5.25V. SP481/483/485 Low Power Half-Duplex RS485 Transceivers 4 © Copyright 2002 Sipex Corporation DESCRIPTION SP481, SP483, SP485 Receivers SP481, SP483, SP485 The SP481, SP483, and SP485 are half-duplex differential 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 SP481, SP483, and SP485 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 of the SP481, SP483 and SP485 have a tri-state enable control pin. A logic LOW on RE (pin 4) will enable the receiver, a logic HIGH on RE (pin 4) will disable the receiver. 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. The receiver for the SP481 and SP485 will operate up to at least 5Mbps. The SP483 receiver is rated for data rates up to 250kbps. The receiver for each of the three 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 and floating. Drivers SP481, SP483, SP485 Shutdown Mode SP481/SP483 The driver outputs of the SP481, SP483, and SP485 are differential outputs meeting the RS485 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 differential outputs, the drivers can maintain greater than 1.5V voltage levels. The drivers of the SP481, SP483 and SP485 have an enable control line which is active HIGH. A logic HIGH on DE (pin 5) will enable the differential driver outputs. A logic LOW on DE (pin 5) will tri-state the driver outputs. The SP481 and SP483 are 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 5) and a logic HIGH on RE (pin 4) will put the SP481 or SP483 into Shutdown mode. In Shutdown, supply current will drop to typically 1µA. The transmitters of the SP481 and SP485 will operate up to at least 5Mbps. The SP483 has internally slew rate limited driver outputs to minimize EMI. The maximum data rate for the SP483 driver is 250kbps. Rev. 07/28/04 SP481/483/485 Low Power Half-Duplex RS485 Transceivers 5 © Copyright 2002 Sipex Corporation A VOD R Test Point Receiver Output R CRL VOC 1K B 1K VCC S1 S2 Figure 1. Driver DC Test Load Circuit Figure 2. Receiver Timing Test Load Circuit 3V DE DI A CL1 RDIFF A RO Output Under C L Test B B CL2 15pF 500 S1 VCC S2 Figure 3. Driver/Receiver Timing Test Circuit Figure 4. Driver Timing Test Load #2 Circuit fSP481/485 = 1MHz; fSP483 = 100kHz ; tR < 10ns; tF < 10ns +3V DI DRIVER OUTPUT 1.5V 0V 1.5V tPLH B tPHL VO 1/2VO 1/2VO A tDPLH DIFFERENTIAL VO+ OUTPUT 0V VA – VB VO– tDPHL tR tF tSKEW = | tDPLH - tDPHL | Figure 6. Driver Propagation Delays INPUTS RE X X X X DE 1 1 0 1 OUTPUTS DI 1 0 X X LINE CONDITION No Fault No Fault X Fault B 0 1 Z Z INPUTS RE DE 0 0 0 0 0 0 1 0 A 1 0 Z Z A-B +0.2V -0.2V Inputs Open X OUTPUTS R 1 0 1 Z Table 2. Receive Function Truth Table Table 1. Transmit Function Truth Table Rev. 07/28/04 SP481/483/485 Low Power Half-Duplex RS485 Transceivers 6 © Copyright 2002 Sipex Corporation fSP481/485 = 1MHz; fSP483 = 100kHz; tR < 10ns; tF < 10ns +3V DE A, B 1.5V 0V 1.5V tZL 5V tLZ 2.3V VOL VOH A, B 2.3V 0V Output normally LOW 0.5V Output normally HIGH 0.5V tZH tHZ Figure 7. Driver Enable and Disable Times A–B R V0D2+ 0V V0D2– VOH 1.5V VOL 0V INPUT 1.5V OUTPUT tPHL tPLH fSP481/485 = 1MHz; fSP483 = 100kHz; tR < 10ns; tF < 10ns tSKEW = | tPHL - tPLH | Figure 8. Receiver Propagation Delays fSP481/485 = 1MHz; fSP483 = 100kHz; tR < 10ns; tF < 10ns +3V RE R 0V 5V VIL 1.5V 1.5V tZL 1.5V VIH R 0V 1.5V tLZ Output normally LOW 0.5V Output normally HIGH 0.5V tZH tHZ Figure 9. Receiver Enable and Disable Times Rev. 07/28/04 SP481/483/485 Low Power Half-Duplex RS485 Transceivers 7 © Copyright 2002 Sipex Corporation PACKAGE: 8 PIN NSOIC D Ø e E/2 L2 E1/2 E1 E Seating Plane L1 1 Gauge Plane VIEW C b INDEX AREA (D/2 X E1/2) Ø L Ø1 TOP VIEW A1 A Seating Plane A2 8 Pin NSOIC JEDEC MO-012 (AA) Variation MIN NOM MAX SYMBOL A 1.35 1.75 A1 0.1 0.25 A2 1.25 1.65 b 0.31 0.51 c 0.17 0.24 D 4.90 BSC E 6.00 BSC E1 3.90 BSC e 1.27 BSC L 0.4 1.27 L1 1.04 REF L2 0.25 BSC ø 0º 8º ø1 5º 15º SIDE VIEW B B SEE VIEW C b c Note: Dimensions in (mm) BASE METAL SECTION B-B WITH PLATING Rev. 07/28/04 SP481/483/485 Low Power Half-Duplex RS485 Transceivers 8 © Copyright 2002 Sipex Corporation PACKAGE: 8 PIN PDIP N E INDEX AREA E1 1 2 3 E N/2 c eA A1 eB D A e A2 D1 L b3 b b2 b c 8 PIN PDIP JEDEC MS-001 (BA) Variation SYMBOL MIN NOM MAX A 0.21 A1 0.15 A2 0.115 0.13 0.195 b 0.014 0.018 0.022 b2 0.045 0.06 0.07 b3 0.3 0.039 0.045 c 0.008 0.01 0.014 D 0.355 0.365 0.4 D1 0.005 E 0.3 0.31 0.325 E1 0.24 0.25 0.28 e .100 BSC eA .300 BSC eB 0.43 L 0.115 0.13 0.15 Note: Dimensions in (mm) Rev. 07/28/04 SP481/483/485 Low Power Half-Duplex RS485 Transceivers 9 © Copyright 2002 Sipex Corporation ORDERING INFORMATION Model Temperature Range Package SP481CN .............EOL, recommended upgrade SP481E............ 0˚C to +70˚C ............................................................................... 8-pin NSOIC SP481CN/TR .......EOL, recommended upgrade SP481E............ 0˚C to +70˚C ............... ......................... ................................ 8-pin NSOIC SP481CS .............EOL, recommended upgrade SP481E............ 0˚C to +70˚C ............................................................................. 8-pin PDIP SP481EN .............EOL, recommended upgrade SP481E.......... .-40˚C to +85˚C ........................................................................... 8-pin NSOIC SP481EN/TR ........EOL, recommended upgrade SP481E...........-40˚C to +85˚C .......................................................................... 8-pin NSOIC SP481ES ..............EOL, recommended upgrade SP481E............ -40˚C to +85˚C ......................................................................... 8-pin PDIP SP483CN ...................................................................................... 0˚C to +70˚C ............................................................................... 8-pin NSOIC SP483CN/TR ................................................................................ 0˚C to +70˚C ............................................................................... 8-pin NSOIC SP483CS ...................................................................................... 0˚C to +70˚C ................................................................................ 8-pin PDIP SP483EN ..................................................................................... -40˚C to +85˚C ............................................................................. 8-pin NSOIC SP483EN/TR ............................................................................... -40˚C to +85˚C ............................................................................. 8-pin NSOIC SP483ES ..................................................................................... -40˚C to +85˚C .............................................................................. 8-pin PDIP SP485CN ...................................................................................... 0˚C to +70˚C ............................................................................... 8-pin NSOIC SP485CN/TR ................................................................................ 0˚C to +70˚C ............................................................................... 8-pin NSOIC SP485CS ...................................................................................... 0˚C to +70˚C ................................................................................ 8-pin PDIP SP485EN ..................................................................................... -40˚C to +85˚C ............................................................................. 8-pin NSOIC SP485EN/TR ............................................................................... -40˚C to +85˚C ............................................................................. 8-pin NSOIC SP485ES ..................................................................................... -40˚C to +85˚C .............................................................................. 8-pin PDIP For lead-free packages, improved ESD protection and performance: upgrade to SP485E, SP481E, SP483E Example: SP485EN/TR = upgrade to SP485EEN-L/TR /TR = Tape and Reel Pack quantity is 2,500 for NSOIC. CLICK HERE TO ORDER SAMPLES Corporation ANALOG EXCELLENCE Sipex Corporation Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 e-mail: [email protected] 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. Rev. 07/28/04 SP481/483/485 Low Power Half-Duplex RS485 Transceivers 10 © Copyright 2002 Sipex Corporation