MAX202CPE

MAX202CPE is a Maxim RS-232 transceiver that converts TTL/CMOS logic to RS-232 voltage levels using an on-chip charge pump. It is a dual-channel device (two drivers and two receivers) that runs from a single supply in the 3.0–5.5 V range and generates the necessary RS-232 ± voltages.
Key points:
- Dual RS-232 transceiver: 2 TX inputs and 2 RX outputs.
- Supply: 3–5.5 V; RS-232 outputs around ±6 V typical.
- Data rate: up to about 120 kbps.
- External components: four external charge-pump capacitors (typically 0.1 µF) plus a bypass cap on Vcc.
- Package/grade: CPE suffix indicates commercial-temperature range; available in common 8-pin packages.
Typical use: microcontroller serial interfaces, embedded systems, modems, or any board needing level-shifted RS-232 without a separate ±supply.
For exact pinout, capacitor values, and electrical specs, consult the MAX202CPE datasheet.

Equivalents are other dual RS-232 transceivers with a charge-pump. Examples:
- Maxim: MAX232, MAX232A, MAX3232
- Analog Devices: ADM202, ADM232
- STMicroelectronics: ST3232
- Exar: SP3232

Here are the features of MAX202CPE (dual RS-232 transceiver):
- 2 drivers and 2 receivers (RS-232 transceiver)
- Operates from 3.0 V to 5.5 V; 3.3 V logic compatibility
- External charge-pump capacitors required (four 1 µF caps)
- TTL/CMOS-compatible inputs; RS-232 level outputs
- RS-232 voltage swings (typical) suitable for standard interfaces
- Data rates up to about 1 Mbps
- Low power consumption for portable apps
- 8-pin package, Pb-free, Commercial temperature range (CPE suffix)

- Pin count: 16 pins (DIP-16/SO-16 package, MAX202CPE).
- Function: Dual RS-232 transceiver (two drivers and two receivers) with internal charge-pump. Converts TTL/CMOS logic to RS-232 levels and RS-232 levels back to TTL/CMOS, powered from a single supply.

- Manufacturer: Maxim Integrated Products (now part of Analog Devices).
- What kind of company: A fabless semiconductor company that designs and markets analog, mixed-signal, and interface integrated circuits for electronics.

MAX202CPE is a 2-channel RS-232 transceiver with an internal charge pump (TTL/CMOS to RS-232 level shifting). Applications include:
- Connecting microcontrollers/DSPs to RS-232 devices
- PC serial interfaces, modems, routers
- Industrial control, SCADA, PLCs, instrumentation, and test equipment
- Point-of-sale terminals and data loggers
- Medical devices requiring RS-232 communication
In short: used wherever a single-supply RS-232 interface is needed for two independent serial channels.

MAX202CPE comes in an 8-pin package, typically an SOIC-8 (surface-mount) version.