TRS3318E Datasheet | Texas Instruments

FEATURES - ESD Protection for RS-232 I/O Pins - ±15 k V (Human-Body Model) - ±8 k V (IEC 61000-4-2, Contact Discharge) - ±15 k V (IEC 61000-4-2, Air-Gap Discharge) - 300-µA Operating Supply Current - 1-µA Low-Power Standby Mode (With Receivers Active) - Designed to Transmit at a Data Rate of 460 kbps - Auto-Powerdown Plus Option Features Flexible Power-Saving Mode - Operates From a Single 2.25-V to 3-V VCC Supply - Designed to be Interchangeable With Industry Standard '3318 Devices APPLICATIONS - Battery-Powered Systems - PDAs - Cellular Phones - Notebooks - Hand-Held Equipment - Pagers DESCRIPTION The TRS3318E is a dual-driver, dual-receiver, RS232-patible transceiver. The device features auto-powerdown plus and enhanced electrostatic discharge (ESD) protection integrated into the chip. Driver output and receiver input are protected to ±15 k V using the IEC 61000-4-2 Air-Gap Discharge method, ±8 k V using the IEC 61000-4-2 Contact Discharge method, and ±15 k V using the Human Body Model (HBM). The device operates at a data rate of 460 kbps. The transceiver has a proprietary low-dropout driver output stage, enabling RS-232-patible operation from a 2.25-V to 3-V supply with a dual charge pump. The charge pump requires only four 0.1-µF capacitors and features a logic-level output (READY) that asserts when the charge pump is regulating and the device is ready to begin transmitting. The TRS3318E achieves a 1-µA supply current using the auto-powerdown feature . This device automatically enters a low-power power-down mode when the RS-232 cable is disconnected or the drivers of the connected peripherals are inactive for more than 30 s. The device turns on again when it senses a valid transition at any driver or receiver input. Autopowerdown saves power without changes to the existing BIOS or operating system. This device is available in two space-saving packages: 20-pin SSOP and 20-pin TSSOP. DB OR PW PACKAGE (TOP VIEW) READY 1 C1+ 2 V+ 3 C1- 4 C2+ 5 C2- 6 V- 7 DOUT2 8 RIN2...