Overview
The ST3232CWR, produced by STMicroelectronics, is a 3 V powered EIA/TIA-232 and V.28/V.24 communication interface. This device is designed with low power requirements and high data-rate capabilities, making it suitable for a variety of applications. It features a proprietary low dropout transmitter output stage that ensures true RS-232 performance from 3 to 5.5 V supplies. The ST3232CWR requires only four small 0.1 µF standard external capacitors for operation from a 3 V supply.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 3 | - | 5.5 | V |
| Supply Current (ISUPPLY) | 0.3 | 1 | - | mA |
| Data Rate | 250 | - | 400 | kbps |
| Slew Rate | 6 | - | - | V/µs |
| RS-232 Input Threshold Low | 0.6 | 1.1 | - | V (VCC = 3.3V) |
| RS-232 Input Threshold High | 1.5 | 2.4 | - | V (VCC = 3.3V) |
| Input Hysteresis | 0.3 | - | - | V |
| Input Resistance (RRIN) | 3 | 5 | 7 | kΩ |
| Operating Temperature | 0 | - | 70 | °C |
| Package | - | - | - | SO16, SO16L, TSSOP16 |
Key Features
- Low power consumption: 300 µA supply current
- High data-rate capabilities: up to 400 kbps
- High slew rate: 6 V/µs minimum guaranteed
- Meets EIA/TIA-232 specifications down to 3 V
- Available in SO16, SO16L, and TSSOP16 packages
- Requires only four small 0.1 µF standard external capacitors for operation from a 3 V supply
- Two receivers and two drivers
- ±15 kV ESD protection (for some variants)
Applications
The ST3232CWR is typically used in various applications requiring low power and high data-rate RS-232 communication. These include:
- Notebooks, subnotebooks, and palmtop computers
- Battery-powered equipment
- Hand-held equipment
- Peripherals
- Printers
Q & A
- What is the operating voltage range of the ST3232CWR?
The ST3232CWR operates from 3 to 5.5 V.
- What is the maximum guaranteed data rate of the ST3232CWR?
The maximum guaranteed data rate is up to 400 kbps.
- What is the slew rate of the ST3232CWR?
The minimum guaranteed slew rate is 6 V/µs.
- Does the ST3232CWR meet EIA/TIA-232 specifications?
Yes, it meets EIA/TIA-232 specifications down to 3 V.
- What packages are available for the ST3232CWR?
The device is available in SO16, SO16L, and TSSOP16 packages.
- How many external capacitors are required for operation from a 3 V supply?
Four small 0.1 µF standard external capacitors are required.
- How many receivers and drivers does the ST3232CWR have?
The device has two receivers and two drivers.
- What is the typical supply current of the ST3232CWR?
The typical supply current is 300 µA.
- Does the ST3232CWR have ESD protection?
Some variants of the ST3232 series have ±15 kV ESD protection.
- What are the typical applications of the ST3232CWR?
Typical applications include notebooks, subnotebooks, palmtop computers, battery-powered equipment, hand-held equipment, peripherals, and printers.
