MAX3227ECAE+

MAX3227ECAE+ is a Maxim/Analog Devices RS-232 transceiver. It provides the bidirectional level shifting needed to connect a microcontroller (TTL/CMOS logic) to RS-232 devices (PC COM ports, modems, printers, etc.).
Key points
- Single-supply operation (typically 3.0 V to 5.5 V) with an on‑chip charge pump to generate RS‑232 voltage levels.
- Usually a dual-channel device (two drivers and two receivers) for full‑duplex serial communication.
- External charge-pump capacitors required for the RS‑232 voltage generation.
- Outputs swing to standard RS‑232 levels; inputs accept RS‑232 signals; protection and low quiescent current are typical.
- Suitable for common data rates used in RS‑232 links; supports industrial temperature variants in the ECAE+ suffix family.
Applications
- Microcontroller to PC serial port interfaces, modems, data loggers, industrial sensors, PLCs.
Interface overview
- MCU TX/RX connect to the transmitter/receiver inputs; RS-232 lines connect to the driver/receiver outputs. For exact channel count, voltage specs, data rate, capacitor values, and package details, consult the latest MAX3227ECAE+ datasheet.

Are you looking for drop‑in cross‑references for MAX3227ECAE+ (a 4‑channel RS‑232 transceiver)? If yes, please specify the supply voltage (3.3V or 5V) and package. I can then give exact equivalents (e.g., Analog Devices ADM3227 family, Renesas SP3227 family) that match the voltage and pinout.

Here are the typical features of MAX3227ECAE+ (RS-232 transceiver):
- Dual RS-232 transceiver: two drivers and two receivers
- Single-supply operation: supports 3.0 V to 5.5 V
- On-chip charge pump with external capacitors (usually four 0.1 µF caps)
- RS-232 level outputs (≈±6 V) to meet RS-232 specs; TTL/CMOS-compatible inputs
- Data rates suitable for standard UARTs (up to about 1 Mbps, depending on baud and capacitor values)
- Low quiescent current; supports optional shutdown/disable
- ESD protection on RS-232 lines
- Available in extended temperature variants (industrial/ automotive) and RoHS compliant
- Various package options (e.g., small-outline packages)
Note: Always confirm exact voltage range, temperature range, and cap requirements from the specific datasheet for the ECAE+ variant you’re using.

- Pin count: 20 pins (20-pin package, ECAE+ RoHS variant).
- Function: Dual RS-232 transceiver with two drivers and two receivers. It translates TTL/CMOS UART signals to RS-232 levels (T1IN/T2IN to T1OUT/T2OUT) and RS-232 signals to TTL/CMOS (R1IN/R2IN to R1OUT/R2OUT). Includes an on-chip charge-pump voltage generator (requires external capacitors) to generate the RS-232 voltages from a single supply.

Manufacturer: Maxim Integrated (now part of Analog Devices).
Company type: A semiconductor company that designs and markets analog and mixed-signal integrated circuits; traditionally fabless (outsources fabrication).

MAX3227ECAE+ is a low‑power RS‑232 line driver/receiver for 3.0–5.5 V systems. Common application areas include:
- Embedded systems and MCUs needing RS‑232 console/data interfaces
- PC/industrial equipment serial ports (routers, switches, modems)
- Industrial automation, instrumentation, and data‑logging gear
- Medical and laboratory equipment with legacy RS‑232 ports
- Point‑of‑sale terminals and kiosks
- Test, measurement, and development equipment requiring robust serial links
It enables reliable two‑way RS‑232 communication with minimal external components.

A 16-pin RoHS-compliant plastic SSOP package (lead-free) for the MAX3227ECAE+.