SP3232 Datasheet PDF – RS-232 Transceiver, 16 Pin – Sipex

Part Number: SP3232, SP3222E, SP3232E, SP3232ECP

Function : True +3.0V to +5.5V RS-232 Transceivers

Package: DIP, SOIC 16 Pin

Manufacturer: Sipex


SP3232 Transceiver SP3232E


The SP3232, SP3232E series is an RS-232 transceiver solution intended for portable or hand held applications such as notebook or palmtop computers. The SP3222E/3232E series has a high-efficiency, charge-pump power supply that requires only 0.1µF capacitors in 3.3V operation. This charge pump allows the SP3222E/3232E series to deliver true RS-232 performance from a single power supply ranging from +3.3V to +5.0V. The SP3222E, SP3232E are 2-driver/2-receiver devices. This series is ideal for portable or hand-held applications such as notebook or palmtop computers.


SP3232 datasheet pinout


1. Meets true EIA/TIA-232-F Standards from a +3.0V to +5.5V power supply

2. Minimum 120Kbps Data Rate Under Full  Load

3. 1µA Low-Power Shutdown with Receivers Active (SP3222E)

4. Interoperable with RS-232 down to +2.7V power source

SP3232 Datasheet


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RS232 Interface using MAX232 ( What is RS232 ? )

What is RS232 ?


In telecommunications, RS-232 is a standard for serial communication transmission of data. It formally defines the signals connecting between a DTE (data terminal equipment) such as a computer terminal, and a DCE (data circuit-terminating equipment or data communication equipment), such as a modem. The RS-232 standard is commonly used in computer serial ports. The standard defines the electrical characteristics and timing of signals, the meaning of signals, and the physical size and pinout of connectors. The current version of the standard is TIA-232-F Interface Between Data Terminal Equipment and Data Circuit-Terminating Equipment Employing Serial Binary Data Interchange, issued in 1997.

An RS-232 serial port was once a standard feature of a personal computer, used for connections to modems, printers, mice, data storage, uninterruptible power supplies, and other peripheral devices. However, RS-232 is hampered by low transmission speed, large voltage swing, and large standard connectors. In modern personal computers, USB has displaced RS-232 from most of its peripheral interface roles. Many computers do not come equipped with RS-232 ports and must use either an external USB-to-RS-232 converter or an internal expansion card with one or more serial ports to connect to RS-232 peripherals. Nevertheless, RS-232 devices are still used, especially in industrial machines, networking equipment, and scientific instruments.

Reference Site:

1. https://en.wikipedia.org/wiki/RS-232

2. http://www.camiresearch.com/Data_Com_Basics/RS232_standard.html

3. http://www.arcelect.com/rs232.htm




RS232 Interface using MAX232