3-V to 5.5-V Single-Channel RS-232 1-Mbit/s Line Driver/Receiver With +/-15-kV IEC ESD Protection
Product details
Parameters
Package | Pins | Size
Features
- ESD Protection for RS-232 Pins
- ±15-kV Human-Body Model (HBM)
- ±8-kV IEC 61000-4-2 Contact Discharge
- ±15-kV IEC 61000-4-2 Air-Gap Discharge
- Operates With 3-V to 5.5-V VCC Supply
- Operates up to 1 Mbit/s
- Low Standby Current . . . 1 µA Typ
- External Capacitors . . . 4 × 0.1 µF
- Accepts 5-V Logic Input With 3.3-V Supply
- RS-232 Bus-Pin ESD Protection Exceeds ±15 kV Using HBM
- Auto-Powerdown Feature Automatically Disables Drivers for Power Savings
- APPLICATIONS
- Battery-Powered, Hand-Held, and Portable Equipment
- PDAs and Palmtop PCs
- Notebooks, Sub-Notebooks, and Laptops
- Digital Cameras
- Mobile Phones and Wireless Devices
Description
The TRSF3221E consists of one line driver, one line receiver, and a dual charge-pump circuit with ±15-kV IEC ESD protection pin to pin (serial-port connection pins, including GND). The TRSF3221E provides the electrical interface between an asynchronous communication controller and the serial-port connector. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V supply. The TRSF3221E operates at data signaling rates up to 1 Mbit/s and a driver output slew rate of 24 V/µs to 150 V/µs.
Flexible control options for power management are available when the serial port is inactive. The auto-powerdown feature functions when FORCEON is low and FORCEOFF is high. During this mode of operation, if the TRSF3221E does not sense a valid RS-232 signal on the receiver input, the driver output is disabled. If FORCEOFF is set low and the enable (EN) input is high, both the driver and receiver are shut off, and the supply current is reduced to 1 µA. Disconnecting the serial port or turning off the peripheral drivers causes the auto-powerdown condition to occur. Auto-powerdown can be disabled when FORCEON and FORCEOFF are high. With auto-powerdown enabled, the device is activated automatically when a valid signal is applied to the receiver input. The INVALID output notifies the user if an RS-232 signal is present at the receiver input. INVALID is high (valid data) if the receiver input voltage is greater than 2.7 V or less than -2.7 V, or has been between -0.3 V and 0.3 V for less than 30 µs. INVALID is low (invalid data) if the receiver input voltage is between -0.3 V and 0.3 V for more than 30 µs.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | 3-V to 5.5-V Single-Channel RS-232 1-Mbit/s Line Driver/Receiver datasheet | Jul. 13, 2007 |
More literature | RS-232 IEC ESD-Protected Devices From TI (Rev. A) | Jul. 27, 2007 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
This evaluation module is used to evaluate the TRS3221E or TRSF3221E with RGT package. All signals are available through headers and test points. The charge pump output V+ and V- are accessible too. The board interfaces data and control CMOS logic levels on the terminal block to RS-232 levels (...)
Features
- Provides access to logic pins, bus signal
- Provides access to charge pump output pins
- Silkscreen is labeled thoroughly for easy use
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Reference designs
Design files
-
download TIDA-060008 BOM.pdf (56KB) -
download TIDA-060008 CAD files.zip (1688KB) -
download TIDA-060008 Assembly Drawing.pdf (101KB) -
download TIDA-060008 PCB.pdf (458KB) -
download TIDA-060008 Gerber.zip (1858KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
SSOP (DB) | 16 | View options |
TSSOP (PW) | 16 | View options |
VQFN (RGT) | 16 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
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