Overview
The ST3232E, specifically the ST3232EBN, is a 3 V powered EIA/TIA-232 and V.28/V.24 communication interface developed by STMicroelectronics. This device is characterized by its low power requirements, high data-rate capabilities, and enhanced electrostatic discharge (ESD) protection. The ST3232E features a proprietary low-dropout transmitter output stage that ensures true RS-232 performance from 3 to 5 V supplies, utilizing a dual charge pump that requires only four small 0.1 μF external capacitors for operation from a 3 V supply.
The device includes two receivers and two drivers, guaranteeing data rates of up to 250 kbps while maintaining RS-232 output levels. It is available in SO-16 and TSSOP16 packages, making it versatile for various applications.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | -0.3 | - | 6 | V |
| Supply Current (ISUPPLY) | 0.3 | 1 | - | mA |
| Data Rate | 250 | - | - | kbps |
| Slew Rate | 6 | - | - | V/μs |
| Transmitter Output Voltage (VTOUT) | ±5 | ±5.4 | - | V |
| Receiver Input Voltage Range (VRIN) | -25 | - | 25 | V |
| ESD Protection (Human Body Model) | ±15 | - | - | kV |
| ESD Protection (IEC 1000-4-2 Contact Discharge) | ±8 | - | - | kV |
| Operating Temperature Range | -40 | - | 85 | °C |
Key Features
- ESD protection for RS-232 I/O pins up to ±15 kV (human body model) and ±8 kV (IEC 1000-4-2 contact discharge)
- Low power consumption with a supply current of 300 μA
- High data-rate capability of up to 250 kbps
- Minimum guaranteed slew rate of 6 V/μs
- Compliance with EIA/TIA-232 specifications down to 3 V
- Available in SO-16 and TSSOP16 packages
- Proprietary low-dropout transmitter output stage ensuring true RS-232 performance from 3 to 5 V supplies
Applications
- Notebook, subnotebook, and palmtop computers
- Battery-powered equipment
- Hand-held equipment
- Peripherals and printers
- Communications equipment
Q & A
- What is the operating voltage range of the ST3232E?
The ST3232E operates from 3 to 5.5 V.
- What is the maximum guaranteed data rate of the ST3232E?
The device is guaranteed to run at data rates of up to 250 kbps.
- What type of ESD protection does the ST3232E offer?
The ST3232E offers ESD protection up to ±15 kV (human body model) and ±8 kV (IEC 1000-4-2 contact discharge).
- What are the available package types for the ST3232E?
The device is available in SO-16 and TSSOP16 packages.
- What is the typical supply current of the ST3232E?
The typical supply current is 300 μA.
- Does the ST3232E meet EIA/TIA-232 specifications?
Yes, the ST3232E meets EIA/TIA-232 specifications down to 3 V.
- What is the slew rate of the ST3232E?
The minimum guaranteed slew rate is 6 V/μs.
- How many receivers and drivers does the ST3232E have?
The device has two receivers and two drivers.
- What is the operating temperature range of the ST3232E?
The operating temperature range is from -40 to 85 °C.
- What type of capacitors are required for the charge pump operation?
The charge pump requires four small 0.1 μF standard external capacitors.
