Overview
The SN65C3221EPWR is a single-channel RS-232 line driver/receiver integrated circuit produced by Texas Instruments. This device is designed to provide the electrical interface between an asynchronous communication controller and the serial-port connector. It operates with a single 3-V to 5.5-V supply and includes a dual charge-pump circuit, enabling it to function efficiently in various voltage environments. The SN65C3221EPWR features robust ESD protection, low standby current, and auto-powerdown capabilities, making it suitable for a wide range of applications.
Key Specifications
| Parameter | Description |
|---|---|
| Package | TSSOP-16 |
| Pins | 16 |
| Operating Temperature Range | -40°C to 85°C |
| Data Rate (Max) | 1 Mbps |
| Drivers Per Package | 1 |
| Receivers Per Package | 1 |
| ESD HBM | ±15 kV |
| Logic Voltage (Min) | 3.3 V |
| Main Supply Voltage (Nom) | 3.3 V, 5 V |
| Standby Current | 1 µA (typical) |
| External Capacitors | 4 × 0.1 µF |
Key Features
- Operates with 3-V to 5.5-V VCC supply
- Operates up to 1 Mbit/s data signaling rate
- Low standby current: 1 µA typical
- 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 human-body model (HBM)
- Auto-powerdown feature for power savings
- INVALID output to notify valid or invalid RS-232 signal
Applications
- Industrial PCs
- Wired networking
- Data center and enterprise computing
- Battery-powered systems
- PDAs, notebooks, laptops, and palmtop PCs
- Hand-held equipment
Q & A
- What is the operating voltage range of the SN65C3221EPWR?
The SN65C3221EPWR operates with a single 3-V to 5.5-V supply.
- What is the maximum data rate supported by the SN65C3221EPWR?
The device supports data signaling rates up to 1 Mbit/s.
- What type of ESD protection does the SN65C3221EPWR offer?
The device offers ±15-kV ESD protection using the human-body model (HBM) and ±8-kV IEC 61000-4-2 contact discharge protection.
- How does the auto-powerdown feature work in the SN65C3221EPWR?
The auto-powerdown feature disables the drivers when a valid RS-232 signal is not detected on the receiver input, reducing the supply current to 1 µA.
- What is the standby current of the SN65C3221EPWR?
The standby current is typically 1 µA.
- Can the SN65C3221EPWR accept 5-V logic input with a 3.3-V supply?
- What is the INVALID output used for in the SN65C3221EPWR?
The INVALID output notifies the user if an RS-232 signal is present at the receiver input.
- What is the operating temperature range of the SN65C3221EPWR?
The operating temperature range is -40°C to 85°C.
- Is the SN65C3221EPWR RoHS compliant?
- What package type does the SN65C3221EPWR come in?
The device comes in a TSSOP-16 package.
