TRS3318E Texas instruments

TRS3318E

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TRS3318E

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Описание

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.

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 V_CC Supply
Designed to be Interchangeable With Industry Standard '3318 Devices

Drivers per package	2
Receivers per package	2
Logic voltage (min) (V)	2.5
Data rate (max) (MBits)	0.46
Main supply voltage (nom) (V)	2.5
Features	Auto-Powerdown Plus
ESD HBM (kV)	15
Rating	Catalog
Operating temperature range (°C)	-40 to 85, 0 to 70
Vout (typ) (V)	5.4