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MXL1535EEWI Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MXL1535EEWI Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 25 page General Description The MAX3535E/MXL1535E isolated RS-485/RS-422 full- duplex transceivers provide 2500VRMS of galvanic isola- tion between the RS-485/RS-422 side and the processor or control logic side. These devices allow fast, 1000kbps communication across an isolation barrier when the common-mode voltages (i.e., the ground potentials) on either side of the barrier are subject to large differences. Isolation is achieved through integrat- ed high-voltage capacitors. The MAX3535E/MXL1535E also feature a 420kHz transformer driver that allows power transfer to the RS-485 side using an external transformer. The MAX3535E/MXL1535E include one differential driver, one receiver, and internal circuitry to send the RS-485 signals and control signals across the isolation barrier (including the isolation capacitors). The MAX3535E/ MXL1535E RS-485 receivers are 1/8 unit load, allowing up to 256 devices on the same bus. The MAX3535E/MXL1535E feature true fail-safe circuitry. The driver outputs and the receiver inputs are protected from ±15kV electrostatic discharge (ESD) on the inter- face side, as specified in the Human Body Model (HBM). The MAX3535E/MXL1535E feature driver slew-rate select that minimizes electromagnetic interference (EMI) and reduces reflections. The driver outputs are short-cir- cuit and overvoltage protected. Other features are hot- swap capability and isolation-barrier fault detection. The MAX3535E operates with a single +3V to +5.5V power supply. The improved secondary supply range of the MAX3535E allows the use of step-down transformers for +5V operation, resulting in considerable power sav- ings. The MXL1535E operates with a single +4.5V to +5.5V power supply. The MXL1535E is a function-/pin- compatible improvement of the LTC1535. The MAX3535E/MXL1535E are available over the commer- cial 0°C to +70°C and extended -40°C to +85°C temper- ature ranges. Applications Isolated RS-485 Systems Systems with Large Common-Mode Voltages Industrial-Control Local Area Networks Telecommunications Systems Features ♦ 2500VRMS RS-485 Bus Isolation Using On-Chip High-Voltage Capacitors ♦ 1000kbps Full-Duplex RS-485/RS-422 Communication ♦ +3V to +5.5V Power-Supply Voltage Range (MAX3535E) ♦ +4.5V to +5.5V Power-Supply Voltage Range (MXL1535E) ♦ 1/8 Unit Receiver Load, Allowing 256 Devices on Bus ♦ ±15kV ESD Protection Using HBM ♦ Pin-Selectable Slew-Rate Limiting Controls EMI ♦ Hot-Swap-Protected Driver-Enable Input ♦ Undervoltage Lockout ♦ Isolation-Barrier Fault Detection ♦ Short-Circuit Protected ♦ Thermal Shutdown ♦ Open-Line and Shorted-Line Fail-Safe Receiver Inputs +3V to +5V, 2500VRMS Isolated RS-485/RS-422 Transceivers with ±15kV ESD Protection ________________________________________________________________ Maxim Integrated Products 1 28 27 26 25 18 17 16 15 1 2 3 4 11 12 13 14 RO1 RE DE DI B SLO RO2 A VCC2 PINS 5–10 and 19–24 ARE REMOVED FROM THE PACKAGE Y Z GND2 GND1 ST2 ST1 VCC1 WIDE SO TOP VIEW MAX3535E MXL1535E PART TEMP RANGE PIN- PACKAGE POWER- SUPPLY RANGE (V) MAX3535ECWI 0°C to +70°C 28 Wide SO +3.0 to +5.5 MAX3535EEWI -40°C to +85°C 28 Wide SO +3.0 to +5.5 MXL1535ECWI 0°C to +70°C 28 Wide SO +4.5 to +5.5 MXL1535EEWI -40°C to +85°C 28 Wide SO+4.5 to +5.5 Pin Configuration Ordering Information 19-3270; Rev 0; 4/04 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Typical Application Circuit appears at end of data sheet. |
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