MAX3420E is a microprocessor-independent USB solution from Microchip that complies with USB Specification Revision 2.0 (Full-Speed Operation) and integrates a full-speed USB transceiver with ±15kV ESD protection and programmable USB connect and disconnect functionality.
The MAX3420E is a full‑speed USB peripheral controller that implements the USB 2.0 specification via an SPI‑based interface. It provides a built‑in full‑speed transceiver with +15 kV ESD protection, programmable USB connect/disconnect, and internal level translators allowing operation from 1.71 V to 3.6 V system voltage. The device includes four general‑purpose inputs and four general‑purpose outputs, endpoint FIFOs, and an internal serial‑interface engine that handles low‑level USB protocol details.
The datasheet supplies a functional diagram, pin‑out tables, register map, absolute maximum ratings, and electrical characteristics. It also lists the two available packages—24‑pin TQFN (4 mm × 4 mm) and 32‑pin LQFP (7 mm × 7 mm)—and provides ordering information, revision history, and contact details for Maxim Integrated Products.
| Logic‑Core Supply Voltage (VL) | 1.71 V to 3.6 V |
|---|---|
| Operating Temperature Range | -40 °C to +85 °C |
| Maximum SPI Clock Frequency | 26 MHz |
| General‑Purpose I/O | 4 inputs and 4 outputs |
The device operates from –40 °C to +85 °C and accepts supply voltages from 0.3 V to 4 V, with normal operation at 3.0 V to 3.6 V.
The MAX3420E provides four general‑purpose inputs and four general‑purpose outputs.
The SPI interface can be clocked up to 26 MHz.