XR3072X / XR3078X Data Sheet Low Power, 18V Tolerant, 3.3V RS-485 / RS-422 Transceivers General Description Features The XR3072X and XR3078X high performance RS-485 / 10% higher SNR (Signal-to-Noise Ratio) compared to RS-422 devices are designed for improved performance in other RS-485 devices (1.65V vs. 1.5V) noisy industrial environments and increased tolerance to 18V fault tolerance on analog bus pins system faults. The analog bus pins can withstand direct shorts up to 18V, Robust ESD (ElectroStatic Discharge) protection: and are protected against ESD events up to 15kV. The 15kV IEC 61000-4-2 Air Gap Discharge differential high output driver delivers 10% higher SNR than 8kV IEC 61000-4-2 Contact Discharge standard RS-485 / RS-422 devices, affording additional noise 15kV Human Body Model margin or extended cable lengths. 4kV Human Body Model on non-bus pins The receivers include full fail-safe circuitry, guaranteeing a 3.0V to 3.6V operation (3.3V 10%) logic-high receiver output when the receiver inputs are open, shorted or undriven. The receiver input impedance is at 300A idle current, 1nA shutdown current minimum 96k (1/8 unit load), allowing up to 256 devices on the bus while preserving the full signal margin. Enhanced receiver fail-safe protection for open, shorted or terminated but idle data lines The drivers are protected by short circuit detection as well as thermal shutdown, and maintain high impedance in shutdown Hot-swap glitch protection on DE and RE pins or when powered off. The XR3072X drivers are slew limited Driver short circuit current limit and thermal shutdown for for reduced EMI and error-free communication over long or overload protection unterminated data cables. th The devices with DE and RE pins include hot swap circuitry 1/8 unit load allows up to 256 devices on bus to prevent false transitions on the bus during powerup or live Industrial operating temperature range (-40C to 85C) insertion, and can enter a 1nA low current shutdown mode for extreme power savings. Industry standard 8- and 14 -pin NSOIC packages The transceivers draw less than 600A from a 3.3V supply, and typically only 300A when idling with the receivers active. Applications Motor control Security systems Building and process automation Remote utility meter reading Energy monitoring and control Long or unterminated transmission lines Ordering Information - page 15 Product Selector Guide Table 1: Selector Guide Part Number Duplex Data Rate Shutdown Receiver and Driver Enable Transceivers on Bus Footprint XR3072XIDTR-F Half 250kbps Yes Yes 256 SN75176 XR3078XIDTR-F Half 20Mbps Yes Yes 256 SN75176 www.maxlinear.com XR3072X / XR3078X 3.3V RS-485 / RS-422 Transceivers Data Sheet Revision History Revision History Document No. Release Date Change Description 1.0.0 Sept 2013 Production release. 1.0.1 Dec 2013 Updated typical driver differential rise / fall time, page 7. Added extended temp range -40C to 125C part numbers, updated I for industrial SHDN 1.0.2 May 2015 and extended temp range, updated ordering information table and table 7. ECN 1525-07. Update to MaxLinear format, update Ordering Information and move to page 15. Move ESD Ratings to below Absolute Maximum Ratings section, Pinout and Block Diagram to Pin 1.0.3 8/30/19 Information section, and Product Selector Guide to first page. Remove obsolete products: XR3070X, XR3071X, XR3073X, XR3074X, XR3075X, XR3076X and XR3077X. 8/30/19 ii