ADM1487

PRELIMINARY TECHNICAL DATA a Low-Current (1µA) Shutdown Mode Slew Rate Control for Error-Free Data Transmission and Low EMI Ultra-Low Power RS-485/RS-422 Transceiver with Low EMI and +/-10kV ESD Protection Preliminary Technical Data FEATURES Low Power - 120µA Max ICC with Driver Disabled High Input Impedance — Up to 256 Transceivers on Bus GENERAL DESCRIPTION ADM1487 The ADM1487 is an ultra-low power RS-485/RS-422 transceiver consisting of one driver and one receiver per package. Quiescent operating current is typically 80µA and 1µA in shutdown mode. The driver and receiver both have three-state outputs. This allows multiple drivers to be connected to an RS-485/RS-422 bus, or several receiver outputs to be connected to a serial data bus. The driver will maintain a high-impedance output state even with power off, while the receiver features fail-safe operation that guarantees a logic high output if the inputs are left open-circuit. The device has slew-rate limited drivers to minimize electromagnetic interference (EMI) and reduce reflections caused by incorrectly terminated cables. ±10kV ESD Protection (Human Body Model) on RS-485 I/O pins Thermal Protection of Driver Glitch-Free Driver Power-Up Allows Hot Connection Driver Maintains High Output Impedance with Power Off Wide Common-Mode Range Allows ±7V Ground Differences Between Devices Pin-Compatible with Industry Standard 75176 APPLICATIONS Battery-Powered RS-485/RS-422 Systems Level Translation FUNCTIONAL BLOCK DIAGRA...