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Maxim USB transceivers guard against ESD

Posted: 13 May 2003 ?? ?Print Version ?Bookmark and Share

Keywords:maxim integrated products? usb transceiver? mic2550a? max3450e? max3451e?

Designed to provide a USB-compliant PHY interface for ASICs and CPUs in cellphones and PDAs, three USB transceivers from Maxim Integrated Products feature 15kV HBM ESD protection on their D+ and D- data lines, thus eliminating the need for external ESD circuitry.

Available in QFN or TSSOP packaging, the MAX3450E is a pin-compatible upgrade to the MIC2550A from Micrel Semiconductor. The MAX3451E includes a 1.5-kilohm pullup resistor and an enumerate input, enabling software control of USB enumeration and eliminating the need for an external resistor, Maxim said.

The MAX3452E detects the availability of VBUS, provides a logic-level output to the ASIC/CPU, and comes in QFN or TSSOP packages.

All three comply with USB 1.1 and 2.0, operating at low speed (1.5Mbps) and full speed (12Mbps).

The MAX3450E and MAX3451E are powered through VBUS from the USB host, directly from a Li+ battery or from a 3.3V supply. The MAX3452E requires a 4V to 5.5V supply provided by the USB host. All three feature a low-power suspend mode and work with ASICs that operate down to 1.65V.

The MAX3450E, MAX3451E and MAX3452E are specified over the extended temperature range (-40C to 85C) and start at 73 cents in lots of 1,000.

EE Times

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