Current limiters for fast digital automation inputs Speed In: 400 kbit/s VR Energy harvesting LED status Serializer Robustness IEC 61000-4 x compliant Speed Out: 6.25 MHz VR CLT01-38S4 400 kbit/s datarate for fast sensors and high-speed sampling digital inputs The CLT01-38S4 adds to the existing current-limiter family, with the same concern for power consumption savings, to give you a full range of solutions. The CLT01-38S4 is an octal input termination device with a highspeed SPI output. Its maximum input datarate is 400 kbit/s while the SPI output rate is 6.25 MHz. As for previous CLT devices, robustness is a key parameter for the CLT01-38S4, with compliance to IEC 61000-4-x surge standards. The CLT01-38S4 runs with all types of sensor according to IEC 61131-2: type 1 and 3, with a 2.35 mA limited current, and type 2, using two inputs per sensor with the correct RREF. KEY BENEFITS Energy harvesting Robustness • LED powered with unused current • IEC 61000-4-2 • LED powered only in on-state ±8 kV contact • ±15 kV air • IEC 61000-4-4 • ±4 kV • IEC 61000-4-5 • 2.5 kV • Reverse polarity (-30 V) • Adjustable ILIM, with typical 2.1 mA to Speed • Remote IO controllers • • 8-bit mode, 400 kbit/s input datarate • 16-bit mode, 200 kbit/s input datarate 2.6 mA at RREF = 15 kΩ • 1 W saved per CLT01-38S4 MAIN APPLICATIONS • Factory automation • Building automation • Proximity sensor interfaces (EN 60947-5-2) www.st.com CURRENT-LIMITING TERMINATION (CLT) SERIES SCLT3-8BT8 CLT01-38S4 Control • Thermal alarm • Overvoltage alarm • Undervoltage alarm Output • Input datarate @ 400 kbit/s • Scalable (daisy chain) • SPI interface • CMOS interface • (Opto-)coupler interface TSSOP14 PCLT-2A TSSOP20 CLT3-4B HTSSOP38 Immunity • Programmable current • Digital filtrer • Reverse polarity • ESD protection • Current limiter 4 • Number of channels 2 8 • Sensors (IEC 61131-2) • Type 1 • Type 2 • Type 3 8 Quad Quad CLT01-38S4 WIRING DIAGRAM VCS RPD VCC UVA SPI CLT01-38S4 VC RC VI Voltage regulator COMP RI VIN IN1 8/16-bit State transfer SPI 8-input Type 1/3 CLT CPHA = 0 CPOL = 0 IN8 RREF REF VDD COMS SCK O-T /CS O-T MISO Field bus Controller RS O-T MOSI SPM DVR LD1 xCLT product O-T = opto-transistor or isolator LD8 CLT3-4BT6 PCLT-2AT4 SCLT3-8BT8 CLT01-38S4 Number of inputs 4 2 8 8 Input IEC 61131-2 Type 1 and 3 Type 1, 2 and 3 Type 1, 2 and 3 Type 1, 2 and 3 Output type Isolated Isolated Non-isolated Isolated Non-isolated SPI serialized transfer Isolated Non-isolated SPI serialized transfer Output drive Opto transistor Opto transistor CMOS compatible Opto transistor Electromagnetic isolator CMOS compatible Opto transistor Electromagnetic isolator CMOS compatible 2.8 mA 2.5 to 7.5 mA 2.35 mA 2.35 mA 25% 18% 10% 10% Yes, using type 1 Yes Yes Yes > 1 kV Type 3: 1 kV Type 2: 0.5 kV > 1 kV > 1 kV Input current limiter Current tolerance Front-end LED status Surge level ESD level 8 kV 15 kV 15 kV 15 kV Package TSSOP-20 TSSOP-14 HTSSOP-38 HTSSOP-38 Input datarate 10 kbit/s 10 kbit/s 40 kbit/s 400 kbit/s Evaluation board STEVAL-IPF008V1 STEVAL-IPF004V1 STEVAL-IPF007V1 STEVAL-IPF023V1 Application note AN2527 AN2482 AN2846 and AN3031 - © STMicroelectronics - March 2013 - Printed in United Kingdom - All rights reserved The STMicroelectronics corporate logo is a registered trademark of the STMicroelectronics group of companies All other names are the property of their respective owners Order code: FLCLIMITERS0313 For more information on ST products and solutions, visit www.st.com