The MAX3346E is a bidirectional transceiver that converts logic-level signals to USB signals, and USB signals to logic-level signals. It includes an internal 1.5kΩ USB pullup resistor and supports both full-speed (12Mbps) and low-speed (1.5Mbps) USB operation. The device features built-in ±15kV ESD protection circuitry for the USB I/O pins, D+ and D-. It operates with VL voltages as low as 1.65V, ensuring compatibility with low-voltage ASICs. The MAX3346E has a logic-selectable suspend mode that reduces current draw to less than 40µA. It also has an enumerate function that allows devices to logically disconnect while plugged in. The MAX3346E is fully compliant with USB specification 1.1 and supports full-speed and low-speed operation under USB specification 2.0. It is available in the miniature 4 x 4 chip-scale package (UCSP), as well as the small 14-pin TSSOP, and is rated for the -40°C to +85°C extended temperature range.
The MAX3346E converts logic‑level signals to USB signals and vice‑versa. It includes an internal 1.5 kΩ pull‑up resistor, a linear regulator that provides a 3.3 V output, and a logic‑selectable suspend mode that reduces current draw to under 40 µA.
The device operates from 1.65 V to 3.6 V on the system side and from 4.0 V to 5.5 V on the USB side, supporting both full‑speed (12 Mbps) and low‑speed (1.5 Mbps) USB specifications. It is offered in a 4 × 4 mm UCSP package and a 14‑pin TSSOP package, and is rated for –40 °C to +85 °C operation.
| Operating Temperature Range | -40°C to +85°C |
|---|---|
| Supply Voltage (VCC) | -0.3 V to +6 V |
| Input Voltage (D+, D-) | -0.3 V to +6 V |
| ESD Protection (D+, D-) | ±15 kV (Human Body Model) |
| Suspend Mode Current Draw | < 40 µA |
| Internal Linear Regulator Output | 3.3 V |
| USB Pull‑up Resistor | 1.5 kΩ |
The suspend mode draws less than 40 µA.
The device provides ±15 kV ESD protection on the D+ and D‑ pins.
It supports full‑speed (12 Mbps) and low‑speed (1.5 Mbps) USB operation.