The MAX13450E/MAX13451E are half-duplex and full-duplex RS-485 transceivers. These devices feature internal 100Ω and 120Ω termination resistors. The resistor values are pin selectable. A logic supply input allows interfacing to logic levels down to +1.8V. The MAX13450E/MAX13451E feature strong drivers specified to drive low-impedance lines found when a fully loaded bus, based on today's 100Ω characteristic impedance cable, is doubly terminated. Both devices allow slew-rate limiting of the driver output to reduce EMI and reflections for data rates up to 500kbps. The MAX13451E has a FAULT alarm indication output to signal to the system that an error condition exists in the driver. The MAX13451E also features a logic inversion function. The logic inversion allows phase reversal of the A-B signals in case these are inadvertently connected wrongly. The MAX13450E/MAX13451E have 1/8-unit load receiver input impedance, allowing up to 256 transceivers on the bus. All driver outputs are protected to ±30kV ESD using the Human Body Model (HBM). The MAX13450E/MAX13451E are available in a 14-pin TSSOP package and operate over the automotive −40°C to +125°C temperature range. Applications * Industrial Control Systems * Medical Networks * Motor Control * Portable Industrial Equipment * Security Networks * Easy Configuration of RS-485 Networks Up to 20Mbps (max) Data Rate * Software/Pin-Selectable 100Ω/120Ω Termination * Integrated, Switchable Resistors Eliminate the Need for External Resistors or DIP Switches * Driver Drives 100Ω Double Termination and Supports Cat-5/Cat-6 and 24-AWG Cables * Pin-Selectable Slew-Rate Limiting Reduces EMI for Data Rates Up to 500kbps * 1/8 Unit Load Allows Up to 256 Transceivers On the Bus * Designed to Perform in Harsh Environments * Extended ESD Protection * ±30kV Human Body Model * ±15kV Air Gap Discharge per IEC 61000-4-2 * ±7kV Contact Discharge per IEC 61000-4-2 * Inverting of A, B Line Polarity (MAX13451E) Allows Phase Reversal if Misconnected * Thermal and Overcurrent Protection * Driver Fault Indication (MAX13451E) * Fail-Safe Receivers * −40°C to +125°C Temperature Range * +4.5V to +5.5V Supply Voltage Range * Integrated Low-Voltage Logic Interface (Down to 1.8V) Interfaces with Small-Geometry ASICs and FPGA https://elecena.pl/product/22314712/rs-485-transceivers-with-integrated-100-120-termination-resistors 2022-12-27 https://elecena.pl/product/22314712/rs-485-transceivers-with-integrated-100-120-termination-resistors 2025-01-18