MAX232N pinout & circuit | pin diagram & capacitors

Explore the MAX232N reference manual for comprehensive details on pinout, circuit configurations, pin diagram, required capacitors, and complete circuit diagram. This essential document provides all the technical specifications and insights needed for effective utilization in your projects.

Brands: Texas Instruments

Download: MAX232N Datasheet PDF

Price: inquiry

In Stock: 4,247

Type: Transceiver

Protocol: RS232

Number of Drivers/Receivers: 2/2

Package: 16-DIP (0.300, 7.62mm)

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MAX232N Pinout

MAX232N Pinout
The MAX232N is a dual driver/receiver IC designed to convert TTL logic levels to RS-232 signal levels, and vice versa. It is commonly used in serial communication applications where a microcontroller or TTL device needs to communicate with RS-232 devices. The chip features 16 pins, including charge pump capacitor connections, two transmitters (T1, T2), and two receivers (R1, R2), as well as power and ground pins. This pin configuration ensures proper signal translation and reliable communication.

NAME	NO.	TYPE	DESCRIPTION
C1+	1	—	Positive lead of C1 capacitor
VS+	2	O	Positive charge pump output for storage capacitor only
C1-	3	—	Negative lead of C1 capacitor
C2+	4	—	Positive lead of C2 capacitor
C2-	5	—	Negative lead of C2 capacitor
VS-	6	O	Negative charge pump output for storage capacitor only
T2OUT	7	O	RS232 line data output (to remote RS232 system)
R2IN	8	I	RS232 line data input (from remote RS232 system)
R2OUT	9	O	Logic data output (to UART)
T2IN	10	I	Logic data input (from UART)
T1IN	11	I	Logic data input (from UART)
R1IN	13	I	RS232 line data input (from remote RS232 system)
T1OUT	14	O	RS232 line data output (to remote RS232 system)
GND	15	—	Ground
Vcc	16	—	Supply Voltage, Connect to external 5V power supply

Understanding the MAX232N pin configuration is essential for implementing RS-232 level translation in embedded systems. Each pin has a specific role in voltage generation, signal input/output, or power management. When connected correctly, the MAX232N enables seamless data exchange between TTL-level logic and RS-232 compliant devices.