SP3483EP

® SP3483 +3.3V Low Power Slew Rate Limited Half-Duplex RS-485 Transceiver ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ RS-485 and RS-422 Transceiver Operates from a single +3.3V supply Interoperable with +5.0V logic Driver/Receiver Enable Low Power Shutdown Mode -7V to +12V Common-Mode Input Voltage Range Allows up to 32 transceivers on the serial bus Compatibility with the industry standard 75176 pinout Driver Output Short-Circuit Protection Slew Rate Limited Driver for Low EMI (SP3483) RO 1 RE 2 DE 3 DI 4 8 VCC SP3483 8 Pin nSOIC 7B 6A 5 GND Now Available in Lead Free Packaging DESCRIPTION The SP3483 device is part of a family of +3.3V low power half-duplex transceivers that meet the specifications of the RS-485 and RS-422 serial protocols. This device is pin-to-pin compatible with the Sipex SP483 device as well as popular industry standards. The SP3483 features Sipex's BiCMOS process, allowing low power operation without sacrificing performance. The SP3483 is internally slew rate limited to reduce EMI and can meet the requirements of RS-485 and RS-422 up to 250kbps. TRUTH TABLES INPUTS RE X X X DE 1 1 0 LINE DI CONDITION 1 No Fault 0 No Fault X X OUTPUTS B 0 1 Z A 1 0 Z INPUTS RE DE 0 0 0 0 0 0 1 0 OUTPUTS A-B R +0.2V 1 -0.2V 0 Inputs Open 1 X Z Table 1. Transmit Function Truth Table Table 2. Receive Function Truth Table Date: 6/23/04 SP3483 Low Power Slew Rate Limited 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 ............................................................................................ +6.0V Input Voltages Logic ............................................. -0.3V to +6.0V Drivers .......................................... -0.3V to +6.0V Receivers ..................................................... ±15V Output Voltages Drivers ......................................................... ±15V Receivers ...................................... -0.3V to +6.0V Storage Temperature ............................................... -65˚C to +150˚C Power Dissipation per package 8-pin NSOIC (derate 6.14mW/˚C above +70˚C) .................... 500mW 8-pin PDIP (derate 11.8mW/˚C above +70˚C) ..................... 1000mW ELECTRICAL CHARACTERISTICS TMIN to TMAX and VCC = +3.3V ± 5% unless otherwise noted. PARAMETERS DRIVER DC Characteristics Differential Output Voltage Differential Output Voltage MIN. TYP. MAX. UNITS CONDITIONS GND 2 VCC VCC VCC 0.2 3 0.8 ±10 ±250 ±250 Volts Volts Volts Volts Volts Volts Volts µA mA mA Unloaded; R = ∞; Figure 1 with load; R = 50Ω; (RS-422); Figure 1 with load; R = 27Ω; (RS-485); Figure 1 R = 27Ω or R = 50Ω; Figure 1 R = 27Ω or R = 50Ω; Figure 1 Applies to DE, DI, RE Applies to DE, DI, RE Applies to DE, DI, RE -7V ≤ VO ≤ +12V -7V ≤ VO ≤ +12V Differential Output Voltage 1.5 Change in Magnitude of Driver Differential Output Voltage for Complimentary States Driver Common-Mode Output Voltage Input High Voltage 2.0 Input Low Voltage Input Current Driver Short-Circuit Current VOUT = HIGH VOUT = LOW DRIVER AC Characteristics Maximum Data Rate 250 Driver Input to Output, tPLH Driver Input to Output, tPHL 400 400 900 900 10 700 700 690 80 90 kbps 1500 1500 1000 1300 1300 120 120 ns ns ns ns ns ns ns ns RE = VCC, DE = VCC Figures 2 and 8 Figures 2 and 8 tDO1 - tDO2 Figures 2 and 9 From 10% to 90% Figures 3 and 9 Figures 4 and 10 Figures 5 and 10 Figures 5 and 10 Figures 4 and 10 Differential 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 RECEIVER DC Characteristics Differential Input Threshold -0.2 Input Hysteresis Output Voltage High VCC-0.4 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 20 0.4 +1 15 1.0 -0.8 60 Volts mV Volts Volts µA kΩ mA mA mA -7V ≤ VCM ≤ +12V VCM = 0V VID = +200mV, -1.5mA VID = -200mV, 2.5mA 0V ≤ VO ≤ VCC; RE = VCC -7V ≤ VCM ≤ +12V DE = 0V, VCC = 0V or 3.6V, VIN = 12V DE = 0V, VCC = 0V or 3.6V, VIN = -7V 0V ≤ VCM ≤ VCC Date: 6/23/04 SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers © Copyright 2004 Sipex Corporation 2 ELECTRICAL CHARACTERISTICS TMIN to TMAX and VCC = +3.3V ± 5% unless otherwise noted. PARAMETERS RECEIVER AC Characteristics Maximum Data Rate Receiver Input to Output, tPLH Receiver Input to Output, tPHL Differential Receiver Skew Receiver Enable to Output Low Receiver Enable to Output High Receiver Disable from Low Receiver Disable from High MIN. TYP. MAX. UNITS CONDITIONS 250 35 35 70 70 50 45 45 45 45 120 120 kbps ns ns ns RE = 0V, DE = 0V Figures 6 and 11 Figures 6 and 11 tRSKEW = tRPHL - tRPLH Figures 6 and 11 70 70 70 70 ns ns ns ns Figures 7 and 12; S1 closed, S2 open Figures 7 and 12; S2 closed, S1 open Figures 7 and 12; S1 closed, S2 open Figures 7 and 12; S2 closed, S1 open 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 Current No Load Shutdown Mode 50 200 600 2000 2000 2500 2500 ns ns ns ns ns RE = 5V, DE = 0V Figures 4 and 10 Figures 5 and 10 Figures 7 and 12; S2 closed, S1 open Figures 7 and 12; S1 closed, S2 open 350 250 650 10 µA µA µA RE, DI = 0V or VCC; DE = VCC RE = 0V, DI = 0V or VCC; DE = 0V DE = 0V, RE=VCC Date: 6/23/04 SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers © Copyright 2004 Sipex Corporation 3 PIN FUNCTION Pin 1 – RO – Receiver Output. RO 1 R 8 VCC Pin 2 – RE – Receiver Output Enable Active LOW. Pin 3 – DE – Driver Output Enable Active HIGH. RE 2 7 B Pin 4 – DI – Driver Input. Pin 5 – GND – Ground Connection. Pin 6 – A – Driver Output/Receiver Input Non-inverting. Pin 7 – B – Driver Output/Receiver Input Inverting. Pin 8 – Vcc – Positive Supply +3.00V < VCC < +3.60V DE 3 6 A D DI 4 SP485 Top View 5 GND SP3483 Pinout (Top View) DESCRIPTION The SP3483 device is part of a family of +3.3V low power half-duplex transceivers that meet the specifications of the RS-485 and RS-422 serial protocols. The device is pin-to-pin compatible with the Sipex SP483 device as well as popular industry standards. The SP3483 features Sipex's BiCMOS process allowing low power operation without sacrificing performance. Drivers The driver outputs of the SP3483 are differential outputs meeting the RS-485 and RS-422 standards. The typical voltage output swing with no load will be 0 Volts to +3.3 Volts. With a loading of 54Ω across the differential outputs, the drivers maintain greater than 1.5V voltage levels. The drivers 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 force the driver outputs into high impedance (high-Z). The SP3483 has internally slew rate limited driver outputs to minimize EMI. The tranceivers will operate up to 250kbps. The 250mA ISC maximum limit on the driver output allows the SP3483 to withstand an infinite short circuit over the -7.0V to +12.0V common mode range without catastrophic damage to the IC. Receivers The SP3483 receiver has 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 receiver of the SP3483 has a high impedance (high-z) 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 of the SP3483 will operate up to 250kbps. The receiver is equipped with a fail-safe feature that guarantees the receiver output will be in a HIGH state when the input is left unconnected. Shutdown Mode The SP3483 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 SP3483 into Shutdown mode. In Shutdown, supply current will drop to typical 1µA, 10µA maximum. Date: 6/23/04 SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers © Copyright 2004 Sipex Corporation 4 VDM R S1 R L = 2 7Ω D GENERATOR (NOTE 1) 50Ω VCC VOM = VOH + VOL 2 D VCC VOD R VOC OUT CL = 15pF (NOTE 2) 1.5V Figure 1. Driver DC Test Load Circuit Figure 2. Driver Propagation Delay Test Circuit S1 D OUT CL = 50pF (NOTE 2) GENERATOR (NOTE 1) 50Ω RL = 110Ω CL D GENERATOR (NOTE 1) 50Ω VCC RL = 60Ω OUT CL = 15pF (NOTE 2) VOM = VOH + VOL 2 1.5V Figure 3. Driver Differential Output Delay and Transition Time Circuit VCC RL = 110Ω OUT CL = 50pF (NOTE 2) GENERATOR (NOTE 1) 50Ω Figure 4. Driver Enable and Disable Timing Circuit, Output HIGH S1 0V OR 3V D VID GENERATOR (NOTE 1) R OUT CL = 15pF (NOTE 2) 50Ω 1.5V 0V VOM = VCC 2 Figure 5. Driver Enable and Disable Timing Circuit, Output LOW Figure 6. Receiver Propagation Delay Test Circuit 1.5V -1.5V S3 1k VID R S1 VCC S2 CL = 15pF (NOTE 2) GENERATOR (NOTE 1) 50Ω Figure 7. Receiver Enable and Disable Timing Circuit Date: 6/23/04 SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers © Copyright 2004 Sipex Corporation 5 3V INPUT 0V VOH Y OUTPUT VOL tPHL VOH Z OUTPUT VOL tTD tTD 1.5V tPLH VOM 1.5V tPHL VOM IN 1.5V 1.5V 3V 0V tDO1 tDO2 2.0V 90% 50% 10% -2.0V tPLH VOM VOM OUT 50% 10% 90% VOM = VOH + VOL ≈ 1.5V 2 Figure 8. Driver Propagation Delay Waveforms Figure 9. Driver Differential Output Delay and Transition Time Waveforms 3V DE 0V VOH OUTPUT HIGH 0V VCC OUTPUT LOW VOL VOM = VOH + VOL ≈ 1.5V 2 tPZL VOM tPLZ 0.25V tPZH VOM tPHZ 0.25V 1.5V 1.5V 3V INPUT 0V tRPLH VCC OUTPUT 0V VOM = VCC 2 VOM VOM tRPHL 1.5V 1.5V Figure 10. Driver Enable and Disable Timing Waveforms Figure 11. Receiver Propagation Delay Waveforms S1 is open S2 is closed S3 = 1.5V 3V RE 0V tPRHZ VOH OUTPUT 0V 10% 1.5V tPRZH tPRSH OUTPUT VOL 3V S1 is closed S2 is open S3 = -1.5V 1.5V 1.5V RE 0V 1.5V tPRLZ VCC 1.5V tPRZL tPRSL 1.5V 10% Figure 12. Receiver Enable and Disable Waveforms NOTE 1: The input pulse is supplied by a generator with the following characteristics: PRR=250KHz, 50% duty cycle, tr < 6.0ns, Z0=50Ω. NOTE 2: CL includes probe and stray capacitance. Date: 6/23/04 SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers © Copyright 2004 Sipex Corporation 6 PACKAGE: 8 PIN PDIP N INDEX AREA E E1 E 1 2 3 N/2 A1 c eA eB D A e D1 L b3 b2 b A2 8 PIN PDIP JEDEC MS-001 (BA) Variation A A1 A2 b b2 b3 c D D1 E E1 e eA eB L Dimensions in inches MIN .015 .115 .014 .045 .030 .008 .355 .005 .300 .240 NOM MAX .130 .018 .060 .039 .010 .365 .310 .250 .100 BSC .300 BSC .115 .130 .430 .150 .210 .195 .022 .070 .045 .014 .400 .325 .280 b c 8 PIN PDIP Date: 6/23/04 SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers © Copyright 2004 Sipex Corporation 7 PACKAGE: 8 PIN NSOIC D e E/2 E1 E E1/2 SEE VIEW C 1 INDEX AREA (D/2 X E1/2) A b Ø1 TOP VIEW Gauge Plane L2 Seating Plane Ø1 L L1 Ø VIEW C A A2 SEATING PLANE A1 SIDE VIEW 8 Pin NSOIC (JEDEC MS-012, AA - VARIATION) DIMENSIONS Minimum/Maximum (mm) WITH PLATING b COMMON HEIGHT DIMENSION SYMBOL A A1 A2 b c D E E1 e L L1 L2 Ø Ø1 MIN NOM MAX 1.75 1.35 0.25 0.10 1.25 1.65 0.31 0.51 0.17 0.25 4.90 BSC 6.00 BSC 3.90 BSC 1.27 BSC 0.40 1.27 1.04 REF 0.25 BSC 0º 8º 5º 15º c BASE METAL CONTACT AREA PACKAGE: 8 PIN NSOIC © Copyright 2004 Sipex Corporation Date: 6/23/04 SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers 8 ORDERING INFORMATION Part Number Temperature Range Package SP3483CN ........................................................ 0˚C to +70˚C ......................................................... 8-pin NSOIC SP3483CN/TR .................................................. 0˚C to +70˚C ......................................................... 8-pin NSOIC SP3483CP ........................................................ 0˚C to +70˚C ............................................................ 8-pin PDIP SP3483EN ...................................................... .-40˚C to +85˚C ....................................................... 8-pin NSOIC SP3483EN/TR ................................................ .-40˚C to +85˚C ....................................................... 8-pin NSOIC SP3483EP ...................................................... -40˚C to +85˚C .......................................................... 8-pin PDIP Available in lead free packaging. To order add "-L" suffix to part number. Example: SP3483EN/TR = standard; SP3483EN-L/TR = lead free /TR = Tape and Reel Pack quantity is 2,500 for NSOIC. Corporation ANALOG EXCELLENCE Sipex Corporation Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 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. Date: 6/23/04 SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers © Copyright 2004 Sipex Corporation 9