MAX3421E is a USB 2.0 full-speed/low-speed peripheral and host controller from Texas Instruments that integrates digital logic and analog circuitry to support USB 2.0 protocol
The MAX3421E USB peripheral/host controller provides the digital logic and analog circuitry needed to implement a full‑speed USB peripheral or a full‑/low‑speed host compliant with USB specification rev 2.0. It features a built‑in transceiver with ESD protection, programmable USB connect/disconnect, and an SPI interface that can run up to 26 MHz.
The device operates over a –40 °C to +85 °C temperature range, is offered in 32‑pin TQFP and TQFN packages, and includes eight general‑purpose inputs and eight general‑purpose outputs. It supports USB full‑speed (12 Mbps) and low‑speed (1.5 Mbps) operation with double‑buffered 64‑byte FIFOs for data transfer.
| Operating Temperature | -40 °C to +85 °C |
|---|---|
| Package Types | 32‑pin TQFP (5 mm × 5 mm) and 32‑pin TQFN (6 mm × 5 mm) |
| SPI Voltage Range | 1.4 V to 3.6 V |
| USB Speed Support | Full‑Speed 12 Mbps peripheral, Full‑/Low‑Speed 12 Mbps/1.5 Mbps host |
| Pin Count | 32 pins |
It supports full‑speed (12 Mbps) and low‑speed (1.5 Mbps) USB operation.