MAX202ECSE

MAX202ECSE is a Maxim/Analog Devices RS-232 transceiver. It provides level translation between TTL/CMOS UART signals and RS-232 signals, enabling microcontrollers to talk to PCs, modems, and serial peripherals.
Key features:
- Dual drivers and dual receivers (two RS-232 channels)
- On‑chip charge pump to generate RS-232 voltages from a single 3–5.5 V supply
- 8‑pin package (suffix CSE) and extended temperature range (-40°C to +85°C)
Benefits:
- No external RS-232 driver ICs or bulky capacitors required
- Small footprint and low power
- Simple connection to UARTs with minimal external components
Typical applications:
- Microcontroller-to-PC serial links
- Embedded systems, industrial equipment with RS-232 interfaces
Note:
- Check the datasheet for exact electrical specs, data rates, pinout, and recommended capacitors.

Equivalents are other dual RS-232 transceivers with charge-pump capability. Common cross-refs include:
- Analog Devices ADM202/ADM202A
- STMicroelectronics ST232 / SP232 family
- Renesas SP232 (formerly Intersil)
- Exar SP3232 / SP3232E
- Maxim MAX232 family (e.g., MAX232, MAX232A)
These parts provide similar 2‑driver/2‑receiver RS-232 interfaces with built‑in or external charge pumps.

Here are the core features of MAX202ECSE (dual RS-232 transceiver):
- 2 transmitters and 2 receivers (dual RS-232 transceiver)
- Operates from a single 5V supply
- Integrated charge-pump to generate RS-232 levels (requires four external capacitors)
- TTL/CMOS-compatible logic inputs
- RS-232 level outputs swing typically to ±6V to ±9V
- Data rates up to about 120 kbps (suitable for UARTs)
- Low power consumption
- Available in compact 8-pin packages (e.g., SOIC/DIP)
- RoHS-compliant packaging (ECSE variant)
Note: exact drive, speed, and temperature ranges vary by package/revision; check the datasheet for precise specs.

- Pin count: 16 pins (SOIC-16/DIP-16 common).
- Function: Dual RS-232 transceiver. It provides two drivers and two receivers, converting TTL/CMOS logic to RS-232 levels and vice versa (TIN2 -> TOUT2, RIN1 -> ROUT1, etc.). Uses an on-chip charge pump needing external capacitors to generate the RS-232 voltage rails.

Manufacturer: Maxim Integrated (now part of Analog Devices).
What kind of company: A global semiconductor company that designs and manufactures analog and mixed-signal integrated circuits (op-amps, data converters, transceivers, power management, etc.). Founded in 1983, Maxim was acquired by Analog Devices in 2021.

MAX202ECSE is a dual RS-232 transceiver (two drivers and two receivers) that converts UART/TTL signals to RS-232 levels and back. Typical applications:
- Embedded systems and microcontroller projects needing RS-232 I/O
- PCs/terminals, modems, routers with serial consoles
- Industrial automation (PLCs, data loggers, sensors)
- Point-of-sale terminals and other telecom/industrial equipment requiring RS-232 interfaces

MAX202ECSE uses a 16-pin Small-Outline package (SO-16), RoHS-compliant.