SP3221EEY-L/TR

The SP3221E is an RS-232 transceiver solution intended for portable applications such as notebook and hand held computers. This device uses an internal high-efficiency, charge-pump power supply that requires only 0.1μF capacitors in 3.3V operation. This charge pump and MaxLinear's driver architecture allow the SP3221E to deliver compliant RS-232 performance from a single power supply ranging from +3.0V to +5.5V. The SP3221E is a 1-driver/1-receiver device ideal for laptop/notebook computer and PDA applications. The SP3221E is offered in 16 pin TSSOP and SSOP packages. The AUTO ON-LINE® feature allows the device to automatically "wake-up" during a shut­ down state when an RS-232 cable is connected and a connected peripheral is turned on. Otherwise, the device automatically shuts itself down drawing less than 1μA. The SP3221E is a 1-driver/1-receiver device ideal for portable or handheld applications. The SP3221E transceiver meets the EIA/ TIA-232 and ITU-T V.28/V.24 communication protocols and can be implemented in battery-powered, portable, or handheld applications such as notebook or handheld computers. The SP3221E device features the MaxLinear proprietary and patented (U.S. - 5,306,954) on-board charge pump circuitry that generates ±5.5V RS-232 voltage levels from a single +3.0V to +5.5V power supply. This device is an ideal choice for power sensitive designs. Featuring AUTO ON-LINE® circuitry, the SP3221E reduces the power supply drain to a 1μA supply current. In many portable or handheld applications, an RS-232 cable can be disconnected or a connected peripheral can be turned off. Under these conditions, the internal charge pump and the drivers will be shut down. Otherwise, the system automatically comes online. This feature allows design engineers to address power saving concerns without major design changes.

Applications

• notebook and hand held computers
• laptop/notebook computer
• PDA
• portable or handheld applications

Key features

• Meets true EIA/TIA-232-F Standards from a +3.0V to +5.5V power supply
• Interoperable with EIA/TIA-232 and adheres to EIA/TIA-562 down to a +2.7V power source
• AUTO ON-LINE® circuitry automatically wakes up from a 1μA typical shutdown
• Minimum 250kbps data rate under load
• Regulated charge pump yields stable RS-232 outputs regardless of VCC variations
• ESD specifications: +15KV Human Body Model +15KV IEC61000-4-2 Air Discharge +8KV IEC61000-4-2 Contact Discharge