LTC4332 SPI Extender Over Rugged Differential Link FEATURES DESCRIPTION n 2MHz SCK Over 10m, Operation Up to 1200m The LTC 4332 is a point-to-point rugged SPI extender n Three Extended Slave Selects designed for operation in high noise industrial environ- n Protected from Overvoltage Lines Fault to 60V ments over long distances. Using a 60V fault protected n 40kV HBM ESD on Link Pins differential transceiver, the LTC4332 can transmit SPI data, n IEC ESD 6kV and EFT 4kV on Link Pins including an interrupt signal, up to 2MHz over two twisted n Extended Common Mode Range: 25V pair cables. The extended common mode range and high n Extended Interrupt common mode rejection on the differential link provides n Separate Programmable SPI Modes tolerance to large ground differences betweennodes. n 3V to 5.5V Supply Voltage The LTC4332 provides a control interface using a separate n 1.62V to 5.5V Logic Supply slave select for configuration and fault monitoring. n 4mm 5mm 20-Lead QFN Package All registered trademarks and trademarks are the property of their respective owners. APPLICATIONS n Industrial Control and Sensors n Lighting and Sound System Control TYPICAL APPLICATION Extended SPI Network Over 10m CAT5, 2MHz SCK 3.3V LTC4332 LTC4332 V V 3.3V 3.3V CC CC 620 V V L L 10m 620 620 ON Y A ON 10k 10k 110 LINK LINK Z B MCU INT INT INT REM INT 3.3V 620 MCU SCK SCK SCK REM SCK MCU MISO MISO MISO REM MISO 620 MCU MOSI MOSI MOSI REM MOSI 10m A Y MCU SS1 SS1 SS1 REM SS1 MCU SS2 SS2 SS2 REM SS2 110 MCU SS3 SS3 SS3 REM SS3 B Z MCU SS4 SSC 620 REMOTE REMOTE 3.3V SPEED1 SPEED1 SPEED2 SPEED2 4332 TA01 V GROUND LOOP GND1 GND2 25V PEAK BYPASS CAPACITORS OMITTED FOR CLARITY Rev. A 1 Document Feedback For more information www.analog.comLTC4332 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW Supply Voltages V ........................................................... 0.3V to 6V 20 19 18 17 CC V ............................................................ 0.3V to 6V V 1 16 GND L CC V 2 15 SPEED2 Logic Signals L SPEED1 ON 3 14 ON, LINK, INT, SSC .................................. 0.3V to 6V 21 GND REMOTE 4 13 SS3 REMOTE, SCK, MISO, MOSI, SS1, SS2, SS3, LINK 5 12 SS2 SPEED1, SPEED2 ................. GND 0.3V to V + 0.3V L SSC 6 11 SS1 Interface I/O: A, B, Y, Z ................................ 60V to 60V 7 8 9 10 Operating Temperature Range (Note 11) LTC4332C ................................................ 0C to 70C LTC4332I .............................................40C to 85C UFD PACKAGE 20-LEAD (4mm 5mm) PLASTIC QFN LTC4332H .......................................... 40C to 125C T = 150C, = 43C/W, = 3.4C/W JMAX JA JC EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB Storage Temperature Range .................. 65C to 150C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC4332CUFD PBF LTC4332CUFD TRPBF 4332 20-Lead (4mm 5mm) Plastic QFN 0C to 70C LTC4332IUFD PBF LTC4332IUFD TRPBF 4332 20-Lead (4mm 5mm) Plastic QFN 40C to 85C LTC4332HUFD PBF LTC4332HUFD TRPBF 4332 20-Lead (4mm 5mm) Plastic QFN 40C to 125C Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with TRMPBF suffix. ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T = 25C. V = 5V, V = 3.3V, GND = 0V unless otherwise noted. (Note 6) A CC L SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Power Supplies l V Operating Supply Range 3 5.5 V CC I Operating Supply Current Low Power: ON = 0 l 1 40 A CC Idle: ON = 1, Idle SPI l 12 mA Active: SCK = 2MHz, SPEED INDEX = 8 l 120 mA (Note 7) l V Logic Interface Supply Range 1.62 5.5 V L I Logic Supply Current l 140 A L Differential Driver (Pins Y, Z) V Differential Driver Output Voltage R = l 1.5 V V OD CC R = 27 (Figure1) l 1.5 5 V l I Maximum Driver Short-Circuit Current 60V (Y or Z) 60V (Figure2) 150 250 mA OSD Differential Receiver (Pins A, B) R Receiver Input Resistance 0V V 5.5V (Figure3) 112 k IN CC l V Receiver Common Mode Input Voltage 25 V CM Rev. A 2 For more information www.analog.com SCK A MOSI B Z MISO Y INT