MAX202ECSE+

MAX202ECSE+ is a dual RS-232 transceiver from Maxim Integrated (now Analog Devices). It provides two drivers and two receivers to bridge TTL/CMOS logic levels with RS-232 interfaces, enabling MCU-to-PC or modem-style serial connections. It operates from a single supply (typically 3–5.5 V) and uses a charge-pump to generate the RS-232 voltage swings. The ECSE+ suffix indicates a specific package/temperature/RoHS variant. Applications include microcontroller serial links and other RS-232 peripherals. For exact electrical specs, data rates, capacitor requirements, and pinout, refer to the latest datasheet.

Equivalent devices: 2-channel RS-232 transceivers with charge pumps from other vendors, e.g., ST SP232/SP3232 family, Analog Devices ADM202/ADM232, TI SN75C322x family, and older MC1488/1489 style transceivers. These offer similar RS-232 drivers/receivers with internal charge pumps. They can be substitutes, but pinout and voltage ranges may differ; always verify datasheets/footprints.

Concise features of MAX202ECSE+ (RS-232 transceiver, 2 drivers/2 receivers):
- 2 drivers and 2 receivers (dual RS-232 transceiver)
- Single-supply operation: 3.0V to 5.5V
- On-chip charge pump with four external capacitors to generate RS-232 voltages
- RS-232 level outputs with TTL/CMOS-compatible inputs
- Data rate up to about 120 kbps (verify exact max for your variant)
- Low power consumption; supports idle/low-power modes
- Robust protections: short-circuit protection and ESD protection on RS-232 lines
- Wide operating temperature options (industrial range; see datasheet for exact temp)
- RoHS/lead-free package options; available in compact packages
Note: exact voltage ranges, max data rate, and temperature specs vary by package/grade; consult the latest MAX202ECSE+ datasheet for precise figures.

Pin count: 8 pins (SOIC-8).
Function: Single-channel RS-232 transceiver (one driver and one receiver) that converts between TTL/CMOS UART levels and RS-232 voltage levels. It uses an internal charge-pump to generate the RS-232 swing and requires external charge-pump capacitors (per datasheet). Typical supply range is 3V–5.5V.

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

MAX202ECSE+ is a low-power quad RS-232 transceiver. Key application areas:
- Embedded systems/microcontroller projects needing up to four RS-232 channels
- Host interfaces: PCs, laptops, modems, printers, POS terminals
- Industrial automation and instrumentation: controllers, data loggers, test equipment
- Networking/telecom gear: routers, switches, telecom test equipment
- Automotive diagnostics and telemetry tools
- USB-to-RS-232 adapters and other space-constrained serial links

16-pin surface-mount SOIC (Small-Outline Integrated Circuit); RoHS compliant.