MAX202EESE+

MAX202EESE+ is a dual RS-232 transceiver from Maxim Integrated (two drivers, two receivers). It translates TTL/CMOS logic levels to RS-232 voltage levels and back, enabling microcontrollers to talk to PCs, modems, or other RS-232 devices. The device uses an on‑chip charge pump to generate the required RS-232 voltages from a single 3 V to 5.5 V supply, so no external ± voltages are needed. It requires four external capacitors for the charge pump and is designed for low power operation. The SE/+ suffixes denote package/temperature variants (extended ranges in some options). Typical applications include microcontroller-to-serial ports, embedded systems with RS-232 interfaces, data-logging equipment, and other serial communication links. Key specs to check in the datasheet: supply range, data rate, quiescent current, temperature range, and available package types.

Equivalent parts to MAX202EESE+ are other 2‑channel RS-232 transceivers with onboard charge pumps, such as TI SP3232E (SP3232), Analog Devices ADM232/ADM202, and STMicroelectronics ST232/ST3232. Check voltage range and pinout for drop‑in compatibility (typical operation around 3–5.5V).

Here are the core features of MAX202EESE+ (RS-232 transceiver family):
- 2 drivers and 2 receivers (4-channel RS‑232 interface)
- Single-supply operation from a 5V rail (typical) with on-chip charge pump
- Internal charge-pump to generate RS‑232 voltage levels (±V) from the supply
- Bipolar output swing suitable for RS‑232 signaling (at least ±6V)
- Data rate up to about 120 kbps
- Receiver input thresholds compatible with TTL/CMOS logic
- Receiver outputs are asserted logic high/low for RS‑232 minimum load conditions
- Industrial temperature variant: -40°C to +85°C
- External charge-pump capacitors required (typical small-value caps)
- Available in 8-pin packages (e.g., SOIC/DIP variants)
- Low power consumption for portable/embedded applications
Note: exact voltage ranges, caps, and package options may vary by exact part revision; refer to the datasheet for precise specs.

- Pin count: 16 pins (16-pin package).
- Function: Dual RS-232 transceiver. Provides two drivers and two receivers to convert between TTL/CMOS logic levels and RS-232 voltage levels; uses an internal charge-pump to generate the required RS-232 voltages (external capacitors required).

- Manufacturer: Maxim Integrated (now part of Analog Devices).
- Company type: A semiconductor company that designs and manufactures analog and mixed-signal integrated circuits.

MAX202EESE+ is a dual RS-232 transceiver (2 drivers, 2 receivers) with onboard charge pumps for level shifting from a single supply.
Applications:
- Embedded systems needing UART-to-RS-232 interfaces (microcontrollers to PCs/modems)
- Industrial instrumentation and data-acquisition equipment (loggers, sensors, PLCs)
- Test, measurement, and lab equipment (analyzers, programmers)
- Telecommunications and networking gear with serial console ports
- Point-of-sale devices, printers, and other serial peripherals

The MAX202EESE+ comes in an 8-pin SOIC (Small-Outline) package.