MAX3421EEHJ+TG2C

Controllers Overview

The MAX3421EEHJ+TG2C is a USB peripheral/host controller compliant with USB specification revision 2.0, manufactured by Analog Devices Inc./Maxim Integrated. It integrates digital logic and analog circuitry to implement full-speed USB peripherals or full-/low-speed hosts. The device features an internal serial interface engine (SIE) handling low-level protocol details and a built-in transceiver with ±15kV ESD protection. It connects via a programmable 3- or 4-wire SPI interface operating up to 26MHz. Key electrical parameters include a supply voltage range of 3V to 3.6V for VCC and 1.4V to 3.6V for the logic interface voltage VL. It operates within an extended temperature range of -40°C to +85°C and is housed in a 32-pin TQFP package.

Controllers Feature Summary

• Microprocessor-independent USB solution compatible with MAX3420E firmware
• Intelligent USB SIE automatically handles flow control, double buffering, and error checking
• Internal level translators allow independent system interface voltage operation
• Integrated general-purpose inputs and outputs replace microprocessor I/O pins

Controllers Applications

• Embedded systems requiring USB host or peripheral connectivity
• Medical devices needing isolated or compact USB interfaces
• Custom USB devices connected to microprocessors or DSPs
• Cameras and MP3 players utilizing USB data transfer
• Instrumentation and PLCs interfacing with USB peripherals

Controllers Procurement Notes

Verify the specific suffix TG2C against official manufacturer documentation to confirm tape-and-reel packaging status, as standard datasheets may list tube packaging for the EHJ variant. Ensure the ordering information matches the exact lead-free/RoHS-compliant designation provided by the supplier. Cross-reference the part number with the latest Maxim Integrated product selector to confirm availability and any potential obsolescence notices before finalizing procurement plans.

Controllers Selection Notes

Select the MAX3421EEHJ+TG2C when a microprocessor requires USB functionality without dedicated hardware controllers. This component is suitable for applications needing both host and peripheral modes with software compatibility to the MAX3420E. Consider this part for designs requiring internal D+/D- pull-up/pull-down resistors and VBUS detection. It is ideal for space-constrained PCB layouts due to the 5mm x 5mm TQFP package and supports SPI interfaces up to 26MHz for high-speed data exchange.

Controllers Part Context

The MAX3421E series serves as a bridge between SPI-based processors and USB networks. It simplifies firmware development by handling USB timing and signaling internally. The device allows designers to add USB capabilities to any SPI master, including ASICs and DSPs. It supports both point-to-point connections and hub configurations, making it versatile for various embedded applications ranging from simple input devices to complex data storage solutions.

Controllers Replacement Considerations

The MAX3420E is a compatible alternative for peripheral-only applications, offering register compatibility in that mode. For direct replacements, verify pinout and package dimensions of other MAX3421 variants such as the TQFN version if board space differs. Ensure any substitute maintains the same SPI interface speed and voltage levels.