**ADM202EARUZ-REEL7: Complete Datasheet, Application Circuit, and Replacement Guide**

The **ADM202EARUZ-REEL7** is a robust, dual-channel RS-232 line driver/receiver (transceiver) from Analog Devices, supplied on a 7-inch reel. This IC is engineered to facilitate serial data communication between devices by converting TTL/CMOS logic levels to RS-232 compliant voltage levels and vice versa, which is essential for interfacing with PCs, industrial controllers, and various serial port equipment.

**Complete Datasheet Overview**

A thorough review of the datasheet reveals the IC's key electrical characteristics and capabilities. The device operates from a single **+5V power supply**, a significant advantage as it generates the necessary ±7.5V RS-232 outputs using internal charge-pump voltage converters, eliminating the need for a costly dual power supply. It features a **high data rate capability of up to 230kbps**, making it suitable for a wide range of standard and higher-speed serial communications. The ADM202EARUZ-REEL7 is designed with enhanced electrostatic discharge (ESD) protection, rated at **±15kV on the transceiver I/O pins** (Human Body Model), greatly improving system reliability in harsh electrical environments. It comes in a compact 16-lead SOIC package (R-16), ideal for space-constrained applications.

**Typical Application Circuit**

The standard application circuit for the ADM202EARUZ-REEL7 is straightforward, requiring a minimal number of external components. The core of the circuit involves four **0.1µF charge-pump capacitors** to generate the positive and negative high-voltage rails required for RS-232 transmission. A typical connection for a dual-channel interface is shown below:

1. Connect VCC (Pin 16) to +5V and GND (Pin 15) to ground.

2. Place one 0.1µF capacitor between C1+ (Pin 1) and C1- (Pin 3).

3. Place a second 0.1µF capacitor between C2+ (Pin 4) and C2- (Pin 5).

4. Place two additional 0.1µF capacitors from V+ (Pin 2) to GND and from V- (Pin 6) to GND.

The TTL/CMOS inputs (T1IN, T2IN) are connected to a UART's transmit pins, and the RS-232 outputs (T1OUT, T2OUT) go to the DB9 connector. Conversely, the RS-232 inputs (R1IN, R2IN) receive data from the connector, and the converted logic outputs (R1OUT, R2OUT) connect to the UART's receive pins.

**Replacement and Cross-Reference Guide**

When the ADM202EARUZ-REEL7 is unavailable, several potential replacements can be considered. The most direct substitutes are from the same family, such as the **ADM202E** (non-reel version) or the earlier **MAX202E** from Maxim Integrated (now part of Analog Devices), which is a widely used industry standard with a nearly identical pinout and functionality. Other alternatives include the **SP202ECP** from Sipex/Microchip and the **ST202EC** from STMicroelectronics. It is crucial to **verify the pinout configuration** of any alternative component, as some may have slight variations. Furthermore, while most are drop-in replacements, always confirm that the operating voltage, data rate, and ESD ratings meet or exceed the requirements of your specific application.

**ICGOODFIND**

In summary, the ADM202EARUZ-REEL7 is a highly reliable and efficient solution for RS-232 communication interfaces. Its integration of charge-pump circuitry and robust ESD protection into a compact form factor makes it an excellent choice for a vast array of industrial, telecom, and embedded applications. When sourcing, always ensure you are procuring from authorized distributors to guarantee authenticity.

**Keywords:**

1. **RS-232 Transceiver**

2. **Charge-Pump Voltage Converter**

3. **ESD Protection**

4. **Line Driver/Receiver**

5. **SOIC-16**