MAX3421EEHJ+

Controllers Overview

The MAX3421EEHJ+ is a USB peripheral/host controller compliant with USB specification revision 2.0, manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 3V to 3.6V and supports an operating temperature range from -40°C to +85°C. The device features a programmable SPI interface capable of clock frequencies up to 26MHz. In host mode, it supports full-speed (12Mbps) and low-speed (1.5Mbps) operations. The component is housed in a 32-pin TQFP package measuring 5mm x 5mm.

Controllers Feature Summary

• Microprocessor-independent USB solution compatible with MAX3420E firmware
• Integrated USB transceiver with ±15kV ESD protection on D+, D-, and VBCOMP
• Intelligent Serial Interface Engine (SIE) handling flow control, double buffering, and error checking
• Internal level translators allow independent system interface voltage between 1.4V and 3.6V

Controllers Applications

• Embedded Systems
• Medical Devices
• Custom USB Devices
• Cameras
• Desktop Routers

Controllers Procurement Notes

Verify the specific ordering suffix EEHJ+ corresponds to the 32-pin TQFP package variant when sourcing components. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors. Ensure the procurement channel provides valid traceability for the Analog Devices/Maxim Integrated brand. Cross-reference the part number against current datasheet revisions to confirm pinout and electrical characteristics remain unchanged.

Controllers Selection Notes

Select this component when a microprocessor requires USB host or peripheral functionality via a simple SPI interface. It is suitable for applications needing software compatibility with the MAX3420E while requiring additional host capabilities. Consider the integrated transceiver and internal timers if the host processor lacks precise timing resources for USB protocol management. Verify that the system logic voltage falls within the 1.4V to 3.6V range supported by the VL input.

Controllers Part Context

The MAX3421E series includes variants such as the MAX3421ETJ+ in a TQFN package. The EEHJ+ designation specifically identifies the lead-free, RoHS-compliant version in the 32-lead Thin Quad Flatpack (TQFP) housing. This package option provides a 5mm x 5mm footprint, offering a space-saving alternative to larger packages while maintaining the same electrical performance and register compatibility across the series.

Controllers Replacement Considerations

The MAX3420E serves as a functional predecessor for peripheral-only applications but lacks host mode capabilities. Direct replacement requires verifying that the target application does not utilize host-specific registers or features unique to the MAX3421E. Package differences between TQFP and TQFN variants may necessitate PCB layout adjustments.