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MAX3344E：±15kV ESD-Protected USB Transceivers in UCSP with USB Detect

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 x 4 UCSP™, as well as the small 16-pin TSSOP, and are specified over the extended temperature range, -40°C to +85°C.

Key Features ±15kV ESD Protection On D+ and D- Comply with USB Specification 1.1 (Full Speed 2.0) Separate VP and VM Inputs/Outputs VL Down to 1.65V Allows Connection with Low-Voltage ASICs Enumerate Input—Allows USB Connection through Software USB Detect Function 3.6V (min) to 4V (max)—MAX3344E 1V (min) to 2.8V (max)—MAX3345E Allow Single-Ended or Differential Logic I/O Internal Linear Regulator Allows Direct Powering from the USB Internal Pullup Resistor for Full-Speed Operation Three-State Outputs No Power-Supply Sequencing Required Driver Active in Suspend Mode Available in Miniature Chip-Scale Package

MAX3344E, MAX3345E: Typical Operating Circuit Applications/Uses Cell Phones Data Cradles Digital Cameras Information Appliances MP3 Players PC Peripherals PDAs

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• MAX3345EEVKIT

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• MAX3346E：±15kV ESD-Protected USB Transceiver in UCSP

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