Overview
The ST3243EBTR, produced by STMicroelectronics, is a highly integrated RS-232 transceiver designed to operate within a voltage range of 3 to 5.5 V. This device is optimized for high data rate applications and features enhanced electrostatic discharge (ESD) protection. The ST3243EBTR includes three drivers, five receivers, and a dual charge-pump circuit, ensuring compliance with EIA/TIA and V.28/V.24 communication standards. It is particularly suited for use in portable and battery-powered devices due to its low power consumption and auto power-down feature.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | 3 to 5.5 | V |
| Data Rate | 250 kbps (minimum guaranteed) | kbps |
| ESD Protection | ± 15 kV (human body model), ± 8 kV (IEC 1000-4-2 contact discharge) | kV |
| Auto Power-Down Supply Current | 1 µA | µA |
| Transmitter Output Voltage Range | ± 13.2 V | V |
| Receiver Input Voltage Range | ± 25 V | V |
| Storage Temperature Range | -65 to 150 °C | °C |
| Package Type | TSSOP28 |
Key Features
- ESD protection for RS-232 I/O pins: ± 8 kV IEC 1000-4-2 contact discharge and ± 15 kV human body model.
- Low power consumption: 1 µA supply current in auto power-down mode.
- High data rate capability: Guaranteed minimum data rate of 250 kbps.
- Guaranteed slew rate range: 6 V/ms.
- Guaranteed mouse drive ability.
- External capacitors: 0.1 µF required.
- Compliance with EIA/TIA-232 specifications down to 3 V.
- Auto power-down feature with wake-up capability through receiver R2.
Applications
The ST3243EBTR is suitable for various applications, particularly in portable and battery-powered devices. Typical applications include:
- Notebook computers
- Handheld devices
- Industrial automation equipment
- Medical devices
- Any system requiring high data rate RS-232 communication with low power consumption.
Q & A
- What is the operating voltage range of the ST3243EBTR?
The ST3243EBTR operates within a voltage range of 3 to 5.5 V.
- What is the minimum guaranteed data rate of the ST3243EBTR?
The minimum guaranteed data rate is 250 kbps.
- What level of ESD protection does the ST3243EBTR offer?
The device offers ± 15 kV ESD protection using the human body model and ± 8 kV using IEC 1000-4-2 contact discharge.
- How does the auto power-down feature work?
The auto power-down feature disables the driver outputs and reduces supply current to 1 µA when no valid RS-232 signal is detected. It can be overridden by setting FORCEON high and FORCEOFF high.
- What is the typical supply current in auto power-down mode?
The supply current is reduced to 1 µA in auto power-down mode.
- What type of package is the ST3243EBTR available in?
The device is available in a TSSOP28 package.
- Does the ST3243EBTR meet EIA/TIA-232 specifications?
Yes, the device meets EIA/TIA-232 specifications down to 3 V.
- What is the purpose of the dual charge-pump circuit?
The dual charge-pump circuit enables true RS-232 performance from a 3.0 V to 5.5 V supply.
- Can the ST3243EBTR drive a serial mouse?
Yes, the device is capable of driving a serial mouse, but auto power-down should be disabled in this case.
- What is the storage temperature range for the ST3243EBTR?
The storage temperature range is -65 to 150 °C.
