SP1486EEN-L | DigiCamel IC Datasheet

Online Datasheet

Read SP1486EEN-L online.

SP1486E SIPEX | Alldatasheet

Document overview

Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
PDF pages: 15

Technical content

DESCRIPTION

FEATURES

APPLICATIONS

+5V, 20Mbps PROFIBUS RS485/RS422 Transceivers Advanced Failsafe, 1/8th Unit Load, ±15kV ESD-Protected

Recommended for PROFIBUS applications
High differential output drive, minimum 2.1V into 54Ω load
5.0V Single Supply Operation
ns driver and reveiver skew
20 Mbps data rate
/8th Unit Load, 256 transceivers on bus
Robust ESD Protection for RS485 pins
±15kV Air-Gap Discharge
±15kV Human Body Model
±8kV Contact Discharge
Hot Swap glitch protection on control inputs
Receiver failsafe on open, short or terminated lines
Driver short circuit current limit and thermal shutdown for overload protection
Very low 300μA static power consumption
1μA shutdown mode
High Speed RS485 Communications
Industrial Process Control
PROFIBUS applications SP486E is a half duplex differential line transceiver suitable for high speed bidirectional commu - nication on multipoint bus transmission lines. Each device contains one differential driver and one differential receiver. Devices comply with TIA/EIA-485 and TIA/EIA-422 standards and also meet the higher drive and tighter skew requirements of PROFIBUS applications. Lead-free and RoHS compli- ant packages are available for all models. PROFIBUS is in wide use in industrial control and automation applications and the SP486E is ruggedized for use in harsh operating conditions. Receivers are specially designed to fail-safe to a logic high output state if the inputs are left un-driven or shorted. All RS485 bus-pins are protected against severe ESD events up to ±15kV (Air-Gap and Human Body Model) and up to ±8kV Contact Discharge (IEC 1000-4-2). Drivers are protected from excess current flow caused by bus contention or output short-circuits by both an internal current limit and a thermal-overload shutdown. Devices are rated for Industrial (-40 to +85ºC) or Extended (-40 to +125ºC) operating temperatures. Receiv- ers have exceptionally high input impedance, which places only /8th the standard load on a shared bus. Up to 256 transceivers may coexist while preserving full signal margin. All devices operate from a single 5.0 V power supply and draw negligible quiescent power. Both driver and receiver can be enabled and disabled independently and the device enters a low power shutdown mode if both driver and receiver are disabled. The bus-pin outputs of disabled modules are in high impedance state. The high impedance driver output is maintained over the entire common- mode voltage range from -7 to +2V. Solved by TM B R B D A GND VCC RO RE DE DI +5V 100nF RT SP1486E

Rev J 3/8/2007 SP1486E PROFIBUS/RS485 Transceivers © Copyright 2007 Sipex Corporation PIN ASSIGNMENTS Pin Name Pin Function Pin Function 1 RO Receiver Output. When RE is low and if (A – B) ≥ -40mV, RO is High. If (A – B) ≤ - 200mV, RO is low. 2 RE Receiver Output Enable. RO is enabled when RE is low. When RE is high, RO is high imped- ance. Drive RE high and DE low to enter shutdown mode. RE is a hot-swap input. 3 DE Driver Output Enable. When DE is high, outputs are enabled. When DE is low, outputs are high impedance. Drive DE low and RE high to enter shutdown mode. DE is a hot-swap input. 4 DI Driver Input. With DE high, a low level on DI forces non-inverting output low and inverting out- put high. Similarly, a high level on DI forces non-inverting output high and inverting output low.

5 GND Ground

6 A Non-inverting Receiver Input and Non-inverting Driver Output

7 B Inverting Receiver Input and Inverting Driver Output

8 Vcc Positive Supply Vcc. Bypass Vcc to GND with a 0.1uF capacitor.

Rev J /8/2007 SP1486E PROFIBUS/RS485 Transceivers © Copyright 2007 Sipex Corporation Absolute MAxiMuM RAtings ReCoMMenDeD oPeRAting ConDitions Recommended Operating Conditions Min. Nom. Max. Unit Supply Voltage, Vcc 4.5 5 5.5 V Input Voltage on A and B pins -7 12 V High-level input voltage (DI, DE or RE), Vih 2 Vcc V Low-level input voltage (DI, DE or RE), Vil 0 0.8 V Output Current Driver -60 60 mA Receiver -8 8 Signaling Rate, 20 Mbps Operating Free Air Temperature, Ta Industrial Grade (E) -40 85 Extended Temp Grade (M) -40 125 Junction Temperature, Tj -40 150 °C Note: The least positive (most negative) limit is designated as the maximum value. Vcc=5V ±10%, Tmin to Tmax, unless otherwise noted, Typical values are Vcc=5V and Ta=25°C These are stress ratings only and functional opera - tion of the device at these ratings or any other above those indicated in the operation sections of the speci- fications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.

ELECTRICAL CHARACTERISTICS

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Digital Input Signals: DI, DE, RE Logic input thresholds High, Vih 2.0 V Low, Vil 0.8 Logic Input Current Ta=25°C, after first transition ±1 μA Input Hysteresis Ta=25°C 100 mV Driver Differential Driver Output (VOD) No Load Vcc V Differential Driver Output Rl=100Ω (RS422) 2.1 Vcc VRl=54Ω (RS485) 2.1 2.7 Vcc Differential Driver Output Vcm=-7 to +12V 2.1 2.7 Vcc Change in Magnitude of Differential Output Voltage (ΔVOD) (Note 1) Rl=54 or 100Ω ±0.2 V Driver Common Mode Output Voltage (Voc) Rl=54 or 100Ω 3 V Change in Common Mode Output Voltage (ΔVOC) Rl=54 or 100Ω ±0.2 V Driver Short Circuit Current Limit -7V≤Vout≤+12V ±250 mA Receiver Receiver Input Resistance -7V≤Vcm≤12V 96 KΩ Input Current (A, B pins) DE=0, RE=0, Vcc=0 or 5.5V Vin=12V 125 Vin=-7V -100 μA Receiver Differential Threshold (VA-VB) -7V≤Vcm≤12V -200 -125 -40 mV Receiver Input Hysteresis 25 mV Receiver Output Voltage Voh Iout=-8mA, Vid=-40mV Vcc-1.5 V Vol Iout=8mA, Vid=-200mV 0.4 High-Z Receiver Output Current Vcc=5.5V, 0≤Vout≤Vcc ± 1 μA Receiver Output Short Circuit Current 0V≤Vro ≤Vcc ± 95 mA Supply and Protection Supply Current IQ, Active Mode No load, DI=0 or Vcc 0.30 1 mA Shutdown Mode DE=0, RE=Vcc, DI=Vcc or 0 1 μA Thermal Shutdown Temperature Junction temperature 165 oC Thermal Shutdown Hysteresis 15 Notes: 1. Change in Magnitude of Differential Output Voltage and Change in Magnitude of Common Mode Output Voltage are the changes in output voltage when DI input changes state. 2. The transceivers are put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 50ns the device does not enter shutdown. If the enable inputs are held in this state for at least 600ns the device is assured to be in shutdown. In this low power mode most circuitry is disabled and supply current is typically 1nA. 3. Characterized, not 100% tested

Rev J 3/8/2007 SP1486E PROFIBUS/RS48 Transceivers © Copyright 2007 Sipex Corporation TIMING CHARACTERISTICS DRIVER CHARACTERISTICS: Conditions Min. Typ. Max. Unit Data Signaling Rate Duty Cycle 40 to 60% 20 Mbps Driver Propagation Delay (tPHL, tPLH) RL = 54Ω, CL = 0pF, 12 20 ns Driver Output Rise/Fall Time (tR, tF) 6 10 ns Driver Differential Skew (tPLH – tPHL) 1 ns Driver Enable to Output High (tDZH) RL = 500Ω, CL = 0pF, 0 ns Driver Enable to Output Low (tDZL) 0 ns Driver Disable from Output High (tDHZ) 0 ns Driver Disable from Output Low (tDLZ) 0 ns Shutdown to Driver Output Valid (tDZV) 10 ns RECEIVER CHARACTERISTICS: Conditions Min. Typ. Max. Unit Data Signaling Rate Duty Cycle 40 to 60% 20 Mbps Receiver Propagation Delay (tPLH, tPHL) Cl=15pF, Vid=±2V, 40 ns Propagation Delay Skew (tPLH, tPHL) 1 ns Receiver Output Rise/Fall Time Cl=15pF 1 ns Receiver Enable to Output High (tZH) Cl=15pF, RL=1kΩ 0 ns Receiver Enable to Output Low (tZL) Cl=15pF, RL=1kΩ 0 ns Receiver Disable from Output High (tHZ) Cl=15pF, RL=1kΩ 0 ns Receiver Disable from Output Low (tLZ) Cl=15pF, RL=1kΩ 0 ns Shutdown to Receiver Output Valid (tROV) 300 ns Time to Shutdown (Note 2,3) 0 200 600 ns Unless otherwise noted Vcc= +.0±0.V, ambient temperature Ta from -40 to +8ºC FUNCTION TABLES Receiving Inputs Output RE DE VA - VB RO

0 X ≥ -40mV 1

0 X ≤-200mV 0

0 X Open/shorted 1

Note: Receiver inputs -200mV < VA - VB < -40mV, should be considered indeterminate

Rev J 3/8/2007 SP1486E PROFIBUS/RS485 Transceivers © Copyright 2007 Sipex Corporation TYPICAL PERFORMANCE CHARACTERISTICS Output Current vs Receiver Output Low Voltage 0 1 2 3 4 5 Output Low Voltage (V) Output Current (mA) Output Current (mA) Output Current vs Receiver Output High Voltage 0 1 2 3 4 5 Output High Voltage (V) Output Current (mA) Receiver Output High Voltage vs Temperature 3.5 3.6 3.7 3.8 3.9 -60 -40 -20 0 20 40 60 80 100 Temperature (ºC) Output High Voltage (V) IOUT =8mA, V ID=-40mV Output-Low Voltage (V) Receiver Output Low Voltage vs Temperature 0.1 0.15 0.2 0.25 0.3 0.35 -60 -40 -20 0 20 40 60 80 100 Temperature (ºC) Output Low Voltage (V) IOUT =8mA, V ID=-200mV Output-Low Voltage (V) Driver Differential Output Voltage vs Temperature 2.2 2.4 2.6 2.8 3.2 3.4 -60 -40 -20 0 20 40 60 80 100 Temperature (ºC) Output Voltage (V) R L R L Output Voltage (V) Rl=100Ω Rl=54Ω 15Output Current (mA) Driver Output Current vs Differential Output Voltage 0.01 0.1 100 0 1 2 3 4 5 6 Differential Output Voltage (V) Output Current (mA) Output Current (mA)

Rev J 3/8/200 SP1486E PROFIBUS/RS485 Transceivers © Copyright 200 Sipex Corporation TYPICAL PERFORMANCE CHARACTERISTICS Output Current vs Driver Output Low Voltage 100 0 1 2 3 4 5 6 Output Low Voltage (V) Output Current (mA) Output Current (mA) Output Current vs Driver Output High Voltage -120 -100 -80 -60 -40 -20 -2 -1 0 1 2 3 4 5 6 Output High Voltage (V) Output Current (mA) Output Current (mA) No-load Supply Current vs Temperature 200 225 250 275 300 325 350 -60 -40 -20 0 20 40 60 80 100 Temperature (ºC) No-Load Supply Current (uA) DE = Vcc DE = GND No-Load Supply Current (µA) Driver Output Waveforms High to Low Driver Output Waveform Low to High Driver and Receiver Hot Swap Performance vs. Vcc

Rev J 3/8/2007 SP1486E PROFIBUS/RS485 Transceivers © Copyright 2007 Sipex Corporation Driver DC Test Circuit Receiver DC Test Circuit Driver Propagation Delay Time Test Circuit and Timing Diagram VSKEW = tPLH - tPHL 10% tR-VO VO VDIFF 10% tF 90% 90% VDIFF = V(Y) - V(Z) 1/2 VO Y Z DI 0 VCC/2VCC tPHLtPLH 1/2 VO VO DI D Y Z 3.3V VOD RL 54Ω CL 50pF DI D VCC VOD R/2 R/2 VOC VID B A R RE OUT

Rev J 3/8/2007 SP1486E PROFIBUS/RS485 Transceivers © Copyright 2007 Sipex Corporation VSKEW = tPLH - tPHL 10% tR-VO VO VDIFF 10% tF 90% 90% VDIFF = V(Y) - V(Z) 1/2 VO Y Z DI 0 VCC/2VCC tPHLtPLH 1/2 VO VO DI D Y Z 3.3V VOD RL 54Ω CL 50pF DI D VCC VOD R/2 R/2 VOC VID B A R RE OUT Driver Differential Output Test Circuit Driver Enable and Disable Times Test Circuit and Timing Diagram VOD 60Ω 375Ω 375Ω VCM DDI= 0 or VCC DE= 3V A/Y B/Z DI D Y Z 0 or VCC GENERATOR 50Ω CL=50pF OUT RL= 500Ω DE OUT VCC /2 VCC 0.25V tLZ tZL, tZL(SHDN) VOM = (VOL + VCC)/2

0 OR VCC DI D

Y Z 50Ω CL=50pF VCC OUT RL=500Ω VCC VCC/2 tLZ tZL, tZL(SHDN) 0.25VVOM = (VOL+ VCC)/2 VOL VCC OUT DE VID RE A B R OUT CL 15pF B A OUT tPHL 1.5V tPLH +1V -1V VOH VOL Driver Enable and Disable Times Test Circuit and Timing Diagram Receiver Propagation Delay Test Circuit and Timing Diagram

Rev J 3/8/2007 SP1486E PROFIBUS/RS485 Transceivers © Copyright 2007 Sipex Corporation Driver Enable and Disable Times Test Circuit and Timing Diagram Receiver Enable and Disable Times Test Circuit Receiver Enable and DisableTiming Diagram 1.5V -1.5V GENERATOR S3 B A RE 50Ω 1KΩ CL=15pF VCC RE 1.5V tZH, tZH(SHDN) OUT VOH VOH/2 S1 is open, S2 is closed, S3=1.5V S1 is closed, S2 is open, S3= -1.5V RE OUT VOL = VCC/2 VOL VCC 1.5V tZL, tZL(SHDN) S1 is open, S2 is closed, S3=1.5V RE 0.25V OUT 1.5V VOH S1 is closed, S2 is open, S3= -1.5V RE OUT 1.5V tLZ VCC VOL0.25V

Rev J 3/8/2007 SP1486E PROFIBUS/RS485 Transceivers © Copyright 2007 Sipex Corporation SP1486E is an advanced RS485/RS422 trans- ceiver, ideal for PROFIBUS applications. Each device contains one high speed driver and re - ceiver capable of speeds up to 20Mbps with low skew. The device is designed for reliability in demand- ing operating conditions. It features a fail-safe circuitry that guarantees a logic-high receiver output when the receiver inputs are open or shorted, or when they are connected to a termi- nated transmission line with all drivers disabled. Control inputs (DE and RE) also feature a hot- swap capability allowing live insertion without error data transfer. The device operates from a single 5.0V supply. Drivers are output short-circuit current limited. Thermal-shutdown circuitry protects drivers against excessive power dissipation. When ac- tivated, the thermal-shutdown circuitry places the driver outputs into a high-impedance state. PROFIBUS (EN50170 or DIN1245) The PROFIBUS standard originated in Europe but has spread worldwide as an industrial field- bus for use in process automation and factory control. There are a number of different imple- mentations, but one of the most widely used is PROFIBUS-DP (Process Field Bus - Distribut - ed Peripherals). DP uses RS485 as its physical layer along with a proprietary data-link layer. ADVANCED FAIL SAFE Ordinary RS485 differential receivers will be in an indeterminate state whenever A - B is less than ±200mV. This situation can occur when - ever the data bus is not being actively driven. The Advanced Failsafe feature of the SP1486E guarantees a logic-high receiver output if the receiver’s differential inputs are shorted, open- circuit, or if they are shunted by a termination resistor. The receiver thresholds of the SP1486E are very precise and offset by at least a 40mV noise margin from ground. This results in a logic-high receiver output at zero volts input differential while maintaining compliance with the EIA/TIA- 485 standard of ±200mV. HOT-SWAP CAPABILITY When a micro-processor or other logic device undergoes its power-up sequence its logic-out- puts are typically at high impedance. In this state they are unable to drive the DE and RE signals to a defined logic level. During this pe - riod, noise, parasitic coupling or leakage from other devices could cause standard CMOS en- able inputs to drift to an incorrect logic level. If circuit boards are inserted into an energized backplane (commonly called “live insertion” or “hot-swap”) power may be suddenly applied to all circuits. Without the hot-swap capability, this situation could improperly enable the transceiv- er’s driver or receiver, driving invalid data onto shared busses and possibly causing driver con- tention or device damage. The SP1486E contains a special power-on-re - set circuit that holds DE low and RE high for approximately 10 microseconds. After this ini - tial power-up sequence the hot-swap circuit becomes transparent, allowing for normal, un- skewed enable and disable timings. ±15KV ESD PROTECTION ESD-protection structures are incorporated on all pins to protect against electrostatic discharg- es encountered during handling and assembly. The driver output and receiver inputs have ex - tra protection against static electricity. Sipex uses state of the art structures to protect these pins against ESD of ±15kV without damage. The ESD structures withstand high ESD in all states: normal operation, shutdown, and pow - ered down. After an ESD event, the SP1486E keeps working without latch-up or damage. ESD protection can be tested in various ways. The transmitter outputs and receiver inputs of the SP1486E are characterized for protection to the following limits

±15kV using the Human Body Model
±8kV using the Contact Discharge method specified in IEC 1000-4-2
±15kV Air-gap

Rev J 3/8/2007 SP1486E PROFIBUS/RS485 Transceivers © Copyright 2007 Sipex Corporation The IEC 1000-4-2 standard covers ESD testing and performance of finished equipment. How - ever, it does not specifically refer to integrated circuits. The SP1486E helps you design equip- ment to meet IEC 1000-4-2, without sacrificing board-space and cost for external ESD-protec- tion components. The major difference between tests done using the Human Body Model and IEC 1000-4-2 is a higher peak current in IEC 1000-4-2. Series resistance is lower in the IEC 1000-4-2 model. Hence, the ESD withstand voltage measured to EC 1000-4-2 is generally lower than that mea - sured using the human body model. The air-gap test involves approaching the de - vice with a charged probe. The contact dis - charge method connects the probe to the de - vice before the probe is energized. MACHINE MODEL The machine model for ESD tests all pins using a 200pF storage capacitor and zero discharge resistance. The objective is to emulate the stress caused when I/O pins are contacted by handling equipment during test and assembly.

256 TRANSCEIVERS ON THE BUS

The standard RS485 receiver input impedance is 12kΩ (1 unit load). A standard driver can drive up to 32 unit loads. The SP1486E has only a 1/8th unit load receiver input impedance (96kΩ), thereby allowing eight times as many, up to 256, transceivers to be connected in par - allel on a communication line. Any combination of these devices and other RS485 transceivers up to a total of 32 unit loads may be connected to the line. LOW POWER SHUTDOWN MODE Low-power shutdown mode is initiated by bring- ing both RE high and DE low simultaneously. While in shutdown devices typically draw only 50nA of supply current. DE and RE may be tied together and driven by a single control signal. Devices are guaranteed not to enter shutdown if RE is high and DE is low for less than 50ns. If the inputs are in this state for at least 600ns, the parts are shut-down. Enable times tzh and tzl apply when the part is not in low-power shutdown state. Enable times tzh(shdn) and t zl(shdn) apply when the parts are shut down. The drivers and receivers take longer to become enabled from low-power shut- down mode t zh(shdn) and t zl(shdn) than from driver/receiver-disable mode (tzh, tzl). DRIVER OUTPUT PROTECTION Two mechanisms prevent excessive output cur- rent and power dissipation caused by faults or by bus contention. First, a driver-current limit on the output stage provides immediate protec- tion against short circuits over the whole com - mon-mode voltage range. Second, a thermal- shutdown circuit forces the driver outputs into a high-impedance state if junction temperature becomes excessive.

233 South Hillview Drive

Milpitas, CA 5035 TEL: (408) 34-7500 FAX: (408) 35-7600 Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the applica- tion or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.

ORDERING INFORMATION

Part number Temperature range Package Type SP1486EEN-L From -40 to +85°C Lead Free NSOIC 8 pin SP1486EMN-L From -40 to +125°C Lead Free NSOIC 8 pin For availability of “M” temperatures (-40 to +125ºC) or in other packages contact factory. For Tape and Reel add “/TR”. Example: SP1486EEN-L/TR = lead free and Tape and Reel. SP1486EEN/TR = standard in Tape and Reel. Reel quantity is 2,500 for NSOIC. Solved by TM

Product Information

SP1486EEN-L specifications and overview.

Summary

+5V, 20Mbps PROFIBUS RS485/RS422 Transceivers Advanced Failsafe, 1/8th Unit Load, 짹15kV ESD-Protected

Description

+5V, 20Mbps PROFIBUS RS485/RS422 Transceivers Advanced Failsafe, 1/8th Unit Load, 짹15kV ESD-Protected

Source title SP1486EEN-L Datasheet(PDF) - Sipex Corporation

Related Parts

More parts from the same family.

Browse manufacturer