MAX3233EEWP

MAX3233EEWP is Maxim’s three-channel RS-232 transceiver. It provides three TX drivers and three RX receivers to interface a microcontroller’s TTL/CMOS UARTs with RS-232 devices (PC COM ports, modems, etc.). It runs from a single 4.5–5.5 V supply and uses an on‑chip charge pump with external capacitors to generate the RS-232 voltage swings. It translates TTL/CMOS logic levels to RS-232 levels and back, handles standard RS-232 signaling, and supports typical serial data rates in the hundreds of kbps range. The EEWP suffix indicates the specific lead-free, package variant used for compact surface-mount designs. Typical applications include MCU-to-serial peripherals, data links, and embedded systems requiring multiple RS-232 channels. For exact specs (pinout, capacitor values, speed limits), consult the datasheet.

Key equivalents (2-channel RS-232 transceivers, 3.3–5V operate):
- Analog Devices: ADM3232 / ADM3233
- STMicroelectronics: ST3232 / ST3232E
- Exar (Intersil): SP3232 / SP3232E
- Maxim: MAX3232 / MAX3233 (same family)
Note: check pinout and voltage requirements to ensure a drop-in replacement.

Here are the typical features of the MAX3233EEWP RS-232 transceiver:
- 2 TX drivers and 2 RX receivers (2-channel RS-232 transceiver)
- Single-supply operation from 3.0V to 5.5V
- On-chip charge-pump voltage generator requiring four external capacitors
- RS-232 level outputs: typical ±6V to ±9V; TTL/CMOS compatible inputs
- Data rates up to ~250 kbps per channel
- Low quiescent current and suitable for portable apps
- Wide temperature range (typical -40°C to +85°C)
- ESD protection on I/O pins
- 16-pin package (EEWP RoHS/lead-free variant)
Note: exact capacitor values and performance may vary slightly by revision; consult the datasheet for precise specs.

Pin count: 16 pins (in a 16‑pin package, e.g., SOIC/TSSOP).
Function: MAX3233EEWP is a dual RS-232 transceiver (two drivers and two receivers) that converts TTL/CMOS logic levels to RS-232 voltage levels and back, using an internal charge pump to generate the required RS-232 voltages. It operates from a single supply of typically 3.0–5.5 V.

- Manufacturer: Maxim Integrated Products (now part of Analog Devices).
- What kind of company: A semiconductor company that designs and sells analog and mixed-signal integrated circuits.

- Embedded systems: MCU to RS-232 peripherals
- PC/host serial links (COM ports), modems, printers
- Industrial control panels and instrumentation
- Data acquisition and telemetry systems
- Medical and laboratory equipment with RS-232 interfaces
- Rapid evaluation, development, and prototyping of RS-232 links using the MAX3233EEWP kit

16-pin SSOP (Small-Outline) package, RoHS-compliant.