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ESD-protected USB transceivers

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MAXIM Integrated Products, represented by Arrow Electronics , has introduced the MAX3344E, MAX3345E, and MAX3346E ±15kV ESD-protected USB transceivers.

Packaged in a tiny UCSP, these devices save 55% of the board space over existing solutions.

They provide a USB-compliant physical-layer interface for low-voltage ASIC and CPUs, and are ideal for handheld devices such as cell phones and PDAs.

The USB D+ and D- data lines are protected to ±15kV per the Human Body Model to provide enhanced protection against ESD strikes along the cable and to eliminate external-protection circuitry.

The MAX3344E, MAX3345E, and MAX3346E include a 1.5 kilohm pullup resistor and enumerate input, eliminating the need for an external resistor and allowing the devices to logically disconnect while plugged in.

In addition, the MAX3344E and MAX3345E detect the availability of VBUS and provide a logic-level output to the ASIC and CPU.

The MAX3346E is compliant with the USB specification revisions 1.1 and 2.0, operating at low speed (1.5Mbps) and full speed (12Mbps). The MAX3344E and MAX3345E are only specified for full-speed operation.

The MAX3344E, MAX3345E, and MAX3346E are powered in three ways: VBUS from the USB host, directly from a lithium-ion (Li+) battery, or from a 3.3V supply.

Each device features a low-power suspend mode to work with ASICs that operate down to 1.65V.

The MAX3344E, MAX3345E, and MAX3346E operate over the extended temperature range (-40°C to +85°C).

They are available in space-saving, 4mm x 4mm UCSP or 16-pin TSSOP packages, and the MAX3346E is available in a 4mm x 4mm UCSP or 14-pin TSSOP package.

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