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Product Detailed Parameters
- Description：IC TRANSCEIVER FULL 5/3 28SSOP
- Mfr：Analog Devices Inc./Maxim Integrated
- Package：Tape & Reel (TR)
- Series：-
- Type：Transceiver
- Protocol：RS232
- Number of Drivers/Receivers：5月3日
- Duplex：Full
- Data Rate：250kbps
- Voltage - Supply：3V ~ 5.5V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：28-SSOP (0.209", 5.30mm Width)
- Supplier Device Package：28-SSOP
- Receiver Hysteresis：300 mV
- Grade：-
- Qualification：-
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Overview
The MAX3237EAI-T is a true RS-232 transceiver manufactured by Analog Devices/Maxim Integrated, housed in a 28-pin SSOP package. It operates from a single +3.0V to +5.5V supply and features five drivers and three receivers. The device utilizes a dual charge pump requiring only four 0.1µF external capacitors. In normal mode (MBAUD = GND), it guarantees data rates up to 250kbps. In MegaBaud mode (MBAUD = VCC), it supports speeds up to 1Mbps with specific load conditions. The operating temperature range for the 'E' suffix is -40°C to +85°C.
Feature Summary
- Integrated dual charge pump eliminates the need for bipolar ±12V supplies
- Always-active complementary receiver outputs enable monitoring without forward biasing protection diodes
- Low-power shutdown mode reduces supply current to less than 1µA while keeping receivers active
Applications
- Battery-powered equipment
- Hand-held devices
- Peripherals
- Datacom equipment
Procurement Notes
Verify the ordering suffix against official documentation to confirm the specific package type and temperature rating. Ensure that the required external capacitor values match the selected supply voltage to maintain proper charge pump operation. Confirm pin compatibility if replacing existing designs with other members of the MAX3222/MAX3232/MAX3241 family.
Selection Notes
Select this component when a high driver count (five) is required alongside standard RS-232 communication needs. The MegaBaud feature allows for higher speed transmission when system loads permit. Verify that the application can accommodate the necessary 0.1µF external capacitors for the internal voltage converters.
Part Context
This part belongs to the MAX3222/MAX3232/MAX3237/MAX3241 family of low-power RS-232 transceivers. While sharing the same core architecture and power management features, the MAX3237 is distinguished by its specific configuration of five drivers and three receivers, differing from the two-driver variants in the series.
Replacement Considerations
MAX3237EAI+ is the lead-free equivalent with identical electrical characteristics.
FAQ
How does the MAX3237 achieve 1Mbps data rates?
By connecting the MBAUD pin to VCC, the device enters MegaBaud mode, which increases the slew rate to support data rates up to 1Mbps under specified load conditions.
What is the function of the R_OUTB pins?
The R_OUTB pins provide always-active complementary receiver outputs. They allow external devices to be monitored even when the main receiver outputs are disabled or in shutdown mode.
Can the MAX3237 operate without external capacitors?
No, the device requires four external 0.1µF capacitors to power the internal dual charge pump that generates the necessary ±5.5V levels for RS-232 signaling.
