V6602H RS-485 Transceiver

Transcription

1 V6602H RS-485 Transceiver Version: 0.5 Release Date: October 22, 2017 Specifications are subject to change without notice This document contains information that is proprietary to Unauthorized reproduction of this information in whole or in part is strictly prohibited.

2 Revision History Date Version Description Initial release Updated supply voltage range: 3.3V~24V Updated power consumption in shut down mode to 2μ Updated Receiver Switching Characteristics Updated supply voltage range Updated function descriptions of PIN1, PIN2, PIN4, PIN6,PIN7, and PIN8 dded polarity detection and adaption Updated LDO driving capability from 60m to 150m Updated Specifications Updated Figure 4-4 Receiver Output High Voltage vs. Temperature Updated Figure 6-2 RS-485 Network Using V6602H dded built-in LDO to Features Removed low-power shutdown mode Removed quiescent current Updated Table 2-1 Transmitting Updated Table 2-2 Receiving dd absolute maximum ratings Updated some electrical characteristic due to chip-version update - 1 -

3 General Description The V6602H with built-in LDO is an RS-485 transceiver featuring half-duplex, low power consumption and low slew-rate drivers. It is completely compliant with the EI/TI-485 standard. The V6602H integrates one driver and one receiver. The V6602H has high driving capability allowing up to 256 transceivers on the same communication bus. The low-slew-rate driver can reduce EMI and reflections caused by inappropriate terminal matching. It can also realize the error-free data transmission up to 500 Kbps. V6602H with built-in LDO can support the wide supply voltage input ranging from 3.3V and 5V~24V. In the application of 3.3V power supply, the input/output logic level is 3.3 V. In the application of 5-V power supply, the input/output logic level is 5 V. LDO can support the driving capability up to 150 m. The V6602H, with built-in pull-up and pull-down resistors, be of less than 0.8-m supply current under the no-load condition. The V6602H is protected from faults due to shorted or open receiver input, and integrates over-temperature, over-current, and over-voltage protection. Features Supply voltage range: 3.3 Vand 5V~24V uilt-in LDO: 3.3V input; 5V@ 5V~24V input Half-duplex mode Data rate: <500 Kbps High driving capability: Up to 256 transceivers on one bus Differential driver output: 1.5V V OD V ESD protection: ± 15kV Human ody Model (HM) Fail-safe receiver Over-temperature, over-current, and over-voltage protection Low-slew-rate driver to minimize EMI and reduce reflections caused by inappropriate terminal matching Operation temperature: -40 C ~+85 C Package: SOP-8 pplications Utility meters Industrial control - 2 -

4 Table of Contents Revision History... 1 General Description... 2 Features... 2 pplications... 2 Table of Contents... 3 Figure List... 4 Table List Pin Descriptions Truth Table Specifications bsolute Maximum Ratings Electrical Characteristics Typical Operating Characteristics Test Circuits and Waveform Circuits Description uilt-in LDO Fail-Safe Protection Over-Temperature Protection Output Protection Up to 256 Transceivers on One us Outline Dimensions

5 Figure List Figure 4-1 Supply Current vs. Temperature Figure 4-2 Driver Differential Output Voltage vs. Temperature Figure 4-3 Regulator Output Voltage vs. Temperature Figure 4-4 Receiver Output High Voltage vs. Temperature Figure 4-5 Driver Propagation Delay Figure 4-6 Receiver Propagation Delay Figure 5-1 Driver Test Circuits Figure 5-2 Driver Propagation Delay Waveform Figure 5-3 Receiver Propagation Delay Test Circuit and Waveform Figure 6-1Typical pplication of V6602H with built-in LDO Figure 6-2 RS-485 Network Using V6602H

6 Table List Table 2-1 Transmitting... 7 Table 2-2 Receiving

7 1. Pin Descriptions V CC 1 LDO 8 V IN RO 2 R 7 MODE 3 6 DI 4 D 5 GND No. Pin Description 1 V CC 2 RO 3 MODE 4 DI Main Power: 3.3V or 5V LDO output ypass V CC to GND with a 10uF capacitor. Receiver output. When MODE is logic low, if (-) >-10mV, RO is logic high; and if (-) <-50mV, RO is logic low. When MODE is input logic high, the transmitting mode is enabled. When MODE is input logic low, the receiving mode is enabled. Driver input. 5 GND Ground With MODE high, logic low at DI enforces noninverting output low and inverting output high, and logic high at DI enforces noninverting output high, and inverting output low. 6 Noninverting receiver input/ Noninverting driver output 7 Inverting Receiver input/ Inverting driver output 8 V IN Positive Supply Input: 3.3V and 5V V IN 24V ypass V IN to GND with a 10uF capacitor

8 2. Truth Table Table 2-1 Transmitting Input Output MODE DI Table 2-2 Receiving X Z Z Input Output MODE - RO 0 >-10mV 1 0 <-50mV 0 0 Open/shorted 1 1 X Z In the table, 1 represents logic high, 0 represents logic low, Z represents high impedance state, and X represents Don t care

9 3. Specifications 3.1 bsolute Maximum Ratings Parameter Symbol Test Conditions Min. Max. Unit Supply Voltage V IN +29 V Control Input Voltage /RE, DE V Driver Input Voltage DI V Driver Output Voltage, V Receiver Input Voltage, V Receiver Output Voltage RO -0.3 V CC +0.3 V Continuous Power Dissipation T =+70 C, Derate 5.85 mw/ C above +70 C 471 mw Operating Temperature C Storage Temperature Range C Soldering temperature Sodering, 10s 300 C Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications are not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. 3.2 Electrical Characteristics ll maximum/minimum specifications apply over the entire recommended operation range, unless otherwise noted. ll typical specifications are at T =25 C, V IN =10.0V, C IN =10uF, and C OUT =10uF, unless otherwise noted. ll current into the device is positive, and all current out of the device is negative. ll voltages are relative to the respective ground. Parameter Symbol Test Conditions Min. Typ. Max. Unit Power Unit Input Voltage V IN V V IN =7V ~ 24V Output Voltage No-load Regulation Load Regulation V CC Δ V CC/V CC Δ V CC/V CC V IN =3.3V 3.3 V IN =5.0V 5.0 7V V IN 24V, I OUT =0.5m 0.5m I OUT 50m, V IN =10V V mv mv - 8 -

10 Parameter Symbol Test Conditions Min. Typ. Max. Unit Maximum Output Current I PK m Minimum Input Voltage in No Load V IN,MIN 6 V Temperature Voltage coefficient of Output Δ V CC / Δ T I OUT =0.5m, 50m 0.23 mv/ Driver Supply Voltage Range V CC V Driver Differential Outputs Change in Magnitude of Differential Output Voltage 1 V OD R L =100Ω 2.5 V CC R L =54Ω V CC No load V CC Δ V OD R L =100Ω or 54Ω 0.2 V Common-Mode Output Voltage V OC R L =100Ω or 54Ω V CC /2 V Change in Magnitude of Common-Mode Output Voltage Δ V OC R L =100Ω or 54Ω 0.2 V Input Threshold High V IH MODE,DI 3.0 V Input Threshold Low V IL MODE,DI 0.8 V Input Hysteresis V HYS MODE,DI 100 mv Driver Short-Circuit Output Current I OSD 0 V OUT +12V V V OUT V CC Thermal-Shutdown Threshold T TS 150 C Thermal-Shutdown Hysteresis T TSH 30 C Receiver Receiver Differential Threshold Voltage V TH -7V V CM 12V mv Receiver Input Hysteresis Δ V TH mv RO Threshold High V OH I O =-5m RO Threshold Low V OL I O =5m 0.5 V Three-State Output Current at Receiver V CC I ORZ 0 V O V CC -1 1 μ Receiver Input Impedance R IN -7V V CM 12V 96 KΩ Internal Pull-Up/Pull-Down Resistance R IS -7V V CM 12V 40 KΩ Receiver Short-Circuit Output Current I OSR 0 V RO V CC 40 m ESD Protection V m V 1 Δ V OD denotes the change in magnitude of V OD, and Δ V OC denotes the change in magnitude of V OC, when the DI input changes state

11 Parameter Symbol Test Conditions Min. Typ. Max. Unit, port ESD Protection Supply Current Supply Current Driver Switching Characteristics Propagation Delay Driver Differential Output Rise or Fall Time I CC Human ody Model (HM) Contact Discharge, IEC No load, MODE=V CC No load, MODE=0 ±15 KV ±15 KV DI= V CC m DI= m DI=0 /V CC m t DPLH R DIFF =54Ω,C L =50pF 500 ns t DPHL 500 ns 500 ns Maximum Data Rate F MX 500 kbps Receiver Switching Characteristics Propagation Delay Receiver Input Rise or Fall Time t RPLH t RPHL t RSKD V -V 2.0V Rise or fall time is less than 15 ns V -V 2.0V Rise or fall time is less than 15 ns 200 ns ns 200 ns Maximum Data Rate F MX 500 kbps Temperature Operation Temperature T C Storage Temperature T S C Lead Temperature (Soldering, 10s) 300 C

12 Differential Output Voltage (V) Supply Current (u) 4. Typical Operating Characteristics Supply Current vs Temperature MODE=0 MODE=DI=V CC Temperature ( ) Figure 4-1 Supply Current vs. Temperature Driver Differential Output Voltage vs. Temperature V CC R DIFF =54ohm Temperature( ) Figure 4-2 Driver Differential Output Voltage vs. Temperature

13 Receiver Output High Voltage (V) Regulator Output(V) Regulator Output vs. Temperature I O =0.5m Temperature( ) Figure 4-3 Regulator Output Voltage vs. Temperature Receiver Output High Voltage vs. Temperature I O =5m Temperature( ) Figure 4-4 Receiver Output High Voltage vs. Temperature

14 DI 5V/div V 1V/div Figure 4-5 Driver Propagation Delay V 1V/div RO 5V/div Figure 4-6 Receiver Propagation Delay

15 5. Test Circuits and Waveform V CC DE R L /2 DI D VOD R L C L VOD R L /2 VOC Driver DC Test Load Driver Timing Test Circuit Figure 5-1 Driver Test Circuits V CC V CC /2 V CC /2 0V t DPLH t DPHL VOD VOD/2 +V OD 90% 90% -V OD 10% 10% t DR t DF Figure 5-2 Driver Propagation Delay Waveform +1V 0V 0V TE VID R RO t RPLH t RPHL -1V V OH V CC /2 Test Circuit RO Waveform V OL Figure 5-3 Receiver Propagation Delay Test Circuit and Waveform

16 6. Circuits Description The V6602H with built-in LDO is an RS-485 transceiver featuring half-duplex, low power consumption and low slew-rate drivers. It is completely compliant with the EI/TI-485 standard. The V6602H integrates one driver and one receiver. The V6602H has high driving capability allowing up to 256 transceivers on the same communication bus. The low-slew-rate driver can reduce EMI and reflections caused by inappropriate terminal matching. It can also realize the error-free data transmission up to 500 Kbps. The V6602H, with built-in pull-up and pull-down resistors, be of less than 0.8-m supply current under the no-load condition. The V6602H is protected from faults due to shorted or open receiver input, and integrates over-temperature, over-current, and over-voltage protection. 6.1 uilt-in LDO V6602H with built-in LDO can support the wide supply voltage input ranging from 3.3V and 5V~24V. In the application of 3.3V power supply, the input/output logic level is 3.3 V. In the application of 5-V power supply, the input/output logic level is 5 V. LDO can support the driving capability up to 150 m. Power supply input (V IN ) and LDO output (V CC ) should be connected to a 10-μF capacitor, and then connected to GND. Input 3.3V/5V-24V VIN VCC Output 3.3V/5V,150m C IN =10uF V6602H C OUT =10uF GND Figure 6-1Typical pplication of V6602H with built-in LDO 6.2 Fail-Safe Protection The V6602H has a fail-safe-protected receiver input. When the receiver input is shorted or open, or when all the drivers on the terminated cable are disabled, the device can guarantee the RO is logic high. In the device, the receiver differential threshold voltage is -10mV and -50mV. If the differential input of the receiver (-) is higher than -10mV, RO will be logic high. If all the drivers on the terminated cable are disabled, the differential input of the receiver (-) will be pulled down to 0V, and RO will be logic high

17 6.3 Over-Temperature Protection The integrated thermal shutdown circuit in the V6602H can protect the device from the power dissipation caused by faults. When the temperature of the device exceeds +150 C, the device goes to thermal shut-down mode. 6.4 Output Protection In the V6602H, the overvoltage protection is intended to protect the device from over-voltage. The overvoltage protection circuit compares the output voltage of port and port all the time when both RE and DE are in the transmitting state (MODE=V CC ). When V or V is less than GND, or V or V is higher than V CC, the device enters over-voltage protecting mode, and the circuit will protect the device from damage due to the overvoltage faults. 6.5 Up to 256 Transceivers on One us With regard to a standard RS-485 transceiver, the receiver input impedance is 12kΩ (1-unit load), and the driver can drive up to 32-unit loads. s for the V6602H, the receiver input impedance is higher than 1/8-unit loads (R1>96kΩ), which allows up to 256 tranceivers on the bus. ll tranceivers can be connected to one bus in any combination only if the total loads are no more than 32 units. The total receiver resistor should be the parallel of receiver input resistance and pull-up/pull-down resistance. VCC LDO VIN VIN LDO VCC RO R R RO MODE MODE DI D VIN V CC D DI R R LDO R 485 HU VCC RO MODE D DI Figure 6-2 RS-485 Network Using V6602H

18 7. Outline Dimensions 2 1 E1 θ3 θ4 D 3 E θ1 θ2 b b1 Section - c1 c h θ h L (L1) R1 R L2 Dimensions (Unit: mm) Symbol MIN NOM MX b b c c D E E e L SC L1 L2 R REF 0.25SC - - R h θ 0-8 θ θ θ θ e b