사양
| 속성 | 가치 |
| Package | Tube,Tube |
| ProductStatus | Obsolete |
| Type | Transceiver |
| Protocol | RS232 |
| NumberofDrivers/Receivers | 2/2 |
| Duplex | Full |
| ReceiverHysteresis | 500 mV |
| DataRate | 120Kbps |
| Voltage-Supply | 4.5V ~ 5.5V |
| OperatingTemperature | 0°C ~ 70°C |
| MountingType | Surface Mount |
| Package/Case | 16-SOIC (0.295, 7.50mm Width) |
개요
Description
MAX232CWE is a dual RS-232 transceiver from Maxim (now Analog Devices). It provides two transmitter/receiver channels to connect a microcontroller’s UART to RS-232 devices. It runs from a single 4.5–5.5 V supply and uses an on‑chip charge pump to generate RS-232 voltage levels (roughly ±V) from VCC, so no external ±12 V supply is needed.
Key points:
- 2 TTL/CMOS input/2 RS-232 output channels: T1IN/T2IN (TTL) to T1OUT/T2OUT (RS-232) and R1IN/R2IN (RS-232) to R1OUT/R2OUT (TTL).
- Requires four external capacitors (C1+, C1−, C2+, C2−) for the charge pump (typical values are 0.1 µF to 1 µF; check datasheet).
- Low power, standard 16-pin packages (DIP, SOIC, MSOP variants).
Typical use: MCU UART to PC/serial device via a DB9 connector.
Note: Check the exact datasheet for the specific MAX232CWE variant you have (cap values, voltage range, data-rate limits, temp range).
Key points:
- 2 TTL/CMOS input/2 RS-232 output channels: T1IN/T2IN (TTL) to T1OUT/T2OUT (RS-232) and R1IN/R2IN (RS-232) to R1OUT/R2OUT (TTL).
- Requires four external capacitors (C1+, C1−, C2+, C2−) for the charge pump (typical values are 0.1 µF to 1 µF; check datasheet).
- Low power, standard 16-pin packages (DIP, SOIC, MSOP variants).
Typical use: MCU UART to PC/serial device via a DB9 connector.
Note: Check the exact datasheet for the specific MAX232CWE variant you have (cap values, voltage range, data-rate limits, temp range).
Equivalent
Common drop-in equivalents (2-channel RS-232 transceivers, external capacitors) to MAX232CWE include:
- STMicroelectronics ST232 (and ST232C/ST232E)
- Analog Devices ADM232
- Renesas/Intersil ISL232
- Exar SP3232
- Microchip MCP2321 / MCP2322
- Maxim MAX3221 / MAX3232
Note: pinouts vary by package; always verify against the datasheet for your exact part and footprint.
- STMicroelectronics ST232 (and ST232C/ST232E)
- Analog Devices ADM232
- Renesas/Intersil ISL232
- Exar SP3232
- Microchip MCP2321 / MCP2322
- Maxim MAX3221 / MAX3232
Note: pinouts vary by package; always verify against the datasheet for your exact part and footprint.
Features
Key features of MAX232CWE (RS-232 transceiver):
- Dual RS-232 transceiver: 2 drivers and 2 receivers.
- TTL/CMOS to RS-232 translation and back (bidirectional).
- On-chip charge-pump voltage converter; generates the RS-232 ± voltages from a single supply.
- External capacitors: four small capacitors are required (typical 1 µF each) for the charge pump.
- No dual supply needed: operates from a single 4.5–5.5 V supply ( RS-232 levels generated on-chip).
- Data rate up to about 120 kbps (typical for MAX232-class devices).
- Output voltage swing and input thresholds compatible with standard RS-232 and TTL/CMOS levels.
- Small package options (e.g., 8-pin SOIC/DIP) and RoHS-compliant.
- Low external components, compact and cost-effective for serial links.
- Available in industrial/extended temperature variants (check datasheet for exact range).
Note: Exact voltage ranges, speeds, and temp range may vary by specific package/steppings; refer to the MAX232CWE datasheet for your exact part variant.
- Dual RS-232 transceiver: 2 drivers and 2 receivers.
- TTL/CMOS to RS-232 translation and back (bidirectional).
- On-chip charge-pump voltage converter; generates the RS-232 ± voltages from a single supply.
- External capacitors: four small capacitors are required (typical 1 µF each) for the charge pump.
- No dual supply needed: operates from a single 4.5–5.5 V supply ( RS-232 levels generated on-chip).
- Data rate up to about 120 kbps (typical for MAX232-class devices).
- Output voltage swing and input thresholds compatible with standard RS-232 and TTL/CMOS levels.
- Small package options (e.g., 8-pin SOIC/DIP) and RoHS-compliant.
- Low external components, compact and cost-effective for serial links.
- Available in industrial/extended temperature variants (check datasheet for exact range).
Note: Exact voltage ranges, speeds, and temp range may vary by specific package/steppings; refer to the MAX232CWE datasheet for your exact part variant.
Pinout
- Pin count: 16 pins (DIP-16/SO-16).
- Function: Dual RS-232 transceiver (two drivers and two receivers) that converts TTL/CMOS logic levels to RS-232 levels and vice versa, using an internal charge pump with four external capacitors.
- Function: Dual RS-232 transceiver (two drivers and two receivers) that converts TTL/CMOS logic levels to RS-232 levels and vice versa, using an internal charge pump with four external capacitors.
Manufacturer
Manufacturer: Maxim Integrated Products, Inc. (now part of Analog Devices).
What kind of company: A global semiconductor company that designs and manufactures analog and mixed-signal integrated circuits (ICs) for various applications.
What kind of company: A global semiconductor company that designs and manufactures analog and mixed-signal integrated circuits (ICs) for various applications.
Application
MAX232CWE is a dual RS-232 transceiver. Common application areas include:
- Microcontroller/embedded systems needing RS-232 interfaces
- Serial connections between PCs/terminals/modems and microcontrollers
- Industrial automation and instrumentation (PLCs, data loggers, sensors) with RS-232
- Point-of-Sale terminals, printers, cash registers, kiosks
- Test and measurement equipment and diagnostic tools
- Any device requiring TTL/CMOS to RS-232 level conversion on a single 3–5 V supply
- Microcontroller/embedded systems needing RS-232 interfaces
- Serial connections between PCs/terminals/modems and microcontrollers
- Industrial automation and instrumentation (PLCs, data loggers, sensors) with RS-232
- Point-of-Sale terminals, printers, cash registers, kiosks
- Test and measurement equipment and diagnostic tools
- Any device requiring TTL/CMOS to RS-232 level conversion on a single 3–5 V supply
Package
MAX232CWE is offered in a 16‑pin wide SOIC (Small Outline IC) package.
