MAX202ESE

MAX202ESE is a dual RS-232 transceiver from Maxim Integrated. It provides two RS-232 drivers and two receivers, letting a microcontroller’s TTL/CMOS UART talk to RS-232 ports. It operates from a single supply (typically 3.0–5.5 V) and uses a charge-pump to generate RS-232 voltage swings from that supply. The device converts TTL/CMOS inputs to RS-232 outputs and RS-232 inputs back to TTL/CMOS levels, with standard ± volt signaling and common baud rates. It features low quiescent current, ESD protection, and often extended-temperature Pb-free variants (suffix ESE). Applications include embedded serial interfaces, modems, and industrial controllers. For exact pinout, capacitor requirements, and timing, consult the datasheet.

Equivalent 2‑channel RS-232 transceivers (drop‑in 2 drivers/2 receivers) from other vendors include:
- Maxim: MAX3232 (and MAX232 variants)
- Analog Devices: ADM202 / ADM232
- STMicroelectronics: ST232 / ST232E
- Exar: SP232
- Texas Instruments: SN75C32x family (e.g., SN75C322)

Key features of MAX202ESE (RS-232 transceiver):
- 2 drivers and 2 receivers (2 TX, 2 RX)
- Single-supply operation (typical 3V–5.5V)
- On-chip charge pump generates RS-232 voltage levels
- Meets EIA/TIA-232 (RS-232) interface standards
- TTL/CMOS-compatible input thresholds
- Data rate up to about 1 Mbps
- Low quiescent current with selectable shutdown/low-power mode
- ESD/over-voltage protection on RS-232 lines
- Small package option suitable for compact designs
Note: Exact packaging and extended-temperature variants may vary by device revision.

- Pin count: 16 pins (16-pin package).
- Function: Dual RS-232 transceiver (two drivers and two receivers) that converts TTL/CMOS UART signals to RS-232 levels (and RS-232 levels back to TTL/CMOS), using an internal charge-pump to generate the required RS-232 voltages.

Manufacturer: Maxim Integrated (now part of Analog Devices).
What kind of company: Maxim Integrated is a fabless American semiconductor company that designs analog and mixed-signal integrated circuits. It is now part of Analog Devices, a global semiconductor company.

MAX202ESE is a dual RS-232 transceiver. Common application areas include:
- Embedded systems and microcontroller/FPGA UART interfaces needing RS-232 levels
- PCs, modems, printers, and other RS-232 peripherals
- Industrial automation, control panels, and SCADA equipment
- Instrumentation, test and measurement gear, data loggers
- Medical devices requiring robust RS-232 serial links
- Point-of-sale terminals and retail peripherals
- Any system needing TTL/CMOS to RS-232 level shifting, including devices operating in extended industrial temperature ranges

16-pin surface-mount package (SO-16, also referred to as SO-16/SOP-16).