| Drivers per package | 2 |
| Receivers per package | 2 |
| Logic voltage (Min) (V) | 2.5 |
| Data rate (Max) (kbps) | 460 |
| Main supply voltage (Nom) (V) | 2.5 |
| Features | Auto-Powerdown Plus |
| ESD HBM (kV) | 15 |
| Rating | Catalog |
| Operating temperature range (C) | 0 to 70, -40 to 85 |
| Vout (Typ) (V) | 5.4 |
- ESD Protection for RS-232 I/O Pins
- ±15 kV (Human-Body Model)
- ±8 kV (IEC 61000-4-2, Contact Discharge)
- ±15 kV (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
The TRS3318E is a dual-driver, dual-receiver, RS-232-compatible 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 kV using the IEC 61000-4-2 Air-Gap Discharge method, ±8 kV using the IEC 61000-4-2 Contact Discharge method, and ±15 kV 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-compatible 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. Auto-powerdown 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.
