The MAX3344E/MAX3345E USB transceivers convert logic-level signals to USB signals, and USB signals to logic-level signals. An internal 1.5kΩ USB pullup resistor supports full-speed (12Mbps) USB operation. The MAX3344E/MAX3345E provide built-in ±15kV ESD-protection circuitry on the USB I/O pins, D+ and D-, and VCC. The MAX3344E/MAX3345E operate with logic supply voltages as low as 1.65V, ensuring compatibility with low-voltage ASICs. The suspend mode lowers supply current to less than 40µA. An enumerate function allows devices to logically disconnect while plugged in. The MAX3344E/MAX3345E are fully compliant with USB specification 1.1, and full-speed operation under USB specification 2.0. The MAX3344E/MAX3345E have a USB detect that monitors the USB bus for insertion and signals this event. The MAX3344E USB_DET threshold is between 3.6V (min) and 4V (max), while the MAX3345E USB_DET threshold is between 1V (min) and 2.8V (max). The MAX3344E/MAX3345E are available in the miniature 4 ✕ 4 UCSP™, as well as the small 16-pin TSSOP, and are specified over the extended temperature range, -40°C to +85°C.
The MAX3344E and MAX3345E are bidirectional USB transceivers that convert logic‑level signals to USB signals and vice‑versa. They include an internal 1.5 kΩ pull‑up resistor, ±15 kV ESD protection on the USB I/O pins, and support operation from a low logic supply of 1.65 V.
The devices are available in 4 × 4 UCSP and 16‑pin TSSOP packages, operate over –40 °C to +85 °C, and feature an enumerate function, USB detect output, and suspend mode current below 40 µA, making them suitable for low‑power and battery‑powered applications.
| MAX3344E USB_DET Threshold | 3.6 V (min) – 4 V (max) |
|---|---|
| MAX3345E USB_DET Threshold | 1 V (min) – 2.8 V (max) |
| Suspend Mode Current | < 40 µA |
| ESD Protection | ±15 kV on D+ and D‑ |
| Internal Linear Regulator Output | 3.3 V |
The MAX3344E USB_DET threshold ranges from 3.6 V (minimum) to 4 V (maximum).
In suspend mode the supply current is less than 40 µA.
The device provides ±15 kV ESD protection on the D+ and D‑ pins.