Overview
The SN75C3221PWRG4, produced by Texas Instruments, is a dual-channel RS-232 transceiver designed for use in a variety of applications requiring serial communication. This device integrates one line driver, one line receiver, and a dual charge-pump circuit, providing the necessary 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 features such as auto-powerdown for power savings and ±15-kV ESD protection on serial-port connection pins.
Key Specifications
| Parameter | Min | Typical | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 3.0 | 3.3 / 5.0 | 5.5 | V |
| Operating Temperature (TA) | 0 | 25 | 70 | °C |
| Data Signaling Rate | 1 | Mbit/s | ||
| Driver Output Slew Rate | 24 | 150 | V/μs | |
| Standby Current | 1 | μA | ||
| ESD Protection | ±15 | kV | ||
| External Capacitors | 4 x 0.1 μF |
Key Features
- Operates with 3-V to 5.5-V VCC supply.
- Supports data signaling rates up to 1 Mbit/s.
- Low standby current of 1 μA typical.
- Accepts 5-V logic input with a 3.3-V supply.
- RS-232 bus-pin ESD protection exceeds ±15 kV using the human-body model (HBM).
- Auto-powerdown feature automatically disables drivers for power savings.
- INVALID output pin notifies the user if an RS-232 signal is present at the receiver input.
Applications
- Industrial PCs
- Wired networking
- Data center and enterprise computing
- Battery-powered systems
- PDAs and palmtop PCs
- Notebooks, sub-notebooks, and laptops
- Hand-held equipment
- Digital cameras
- Mobile phones and wireless devices
Q & A
- What is the operating voltage range of the SN75C3221PWRG4?
The SN75C3221PWRG4 operates with a supply voltage (VCC) ranging from 3.0 V to 5.5 V.
- What is the maximum data signaling rate supported by this device?
The device supports data signaling rates up to 1 Mbit/s.
- What is the typical standby current of the SN75C3221PWRG4?
The typical standby current is 1 μA.
- Does the SN75C3221PWRG4 support 5-V logic input with a 3.3-V supply?
Yes, it accepts 5-V logic input with a 3.3-V supply.
- What level of ESD protection does the SN75C3221PWRG4 offer?
The device offers RS-232 bus-pin ESD protection exceeding ±15 kV using the human-body model (HBM).
- How does the auto-powerdown feature work?
The auto-powerdown feature automatically disables the drivers for power savings when the device does not sense a valid RS-232 signal on the receiver input.
- What is the purpose of the INVALID output pin?
The INVALID output pin notifies the user if an RS-232 signal is present at the receiver input.
- What types of applications is the SN75C3221PWRG4 suitable for?
It is suitable for industrial PCs, wired networking, data center and enterprise computing, battery-powered systems, PDAs, notebooks, laptops, hand-held equipment, digital cameras, and mobile phones.
- What are the package options available for the SN75C3221PWRG4?
The device is available in SSOP (DB) and TSSOP (PW) packages.
- What is the operating temperature range for the SN75C3221PWRG4?
The operating temperature range is from 0°C to 70°C.
