USB3450 datasheet(1/39 Pages) MICROCHIP

Part #	USB3450

Description	Hi-Speed USB Host or Device PHY With UTMI Interface

PDF	39 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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1 / 39 page

 2005 - 2016 Microchip Technology Inc.

DS00002105A-page 1

Highlights

• USB-IF “Hi-Speed” certified to the Universal Serial

Bus Specification Rev. 2.0

• Interface compliant with the UTMI+ Specification,

Rev. 1.0

• Functional as a host or device PHY

• Supports HS, FS, and LS data rates

• Supports FS pre-amble for FS hubs with a LS

device attached (UTMI+ Level 3)

• Supports HS SOF and LS keep alive pulse

• Low Latency Hi-Speed Receiver (43 Hi-Speed

clocks Max)

• Internal 1.8 volt regulators allow operation from a

single 3.3 volt supply

• Internal short circuit protection of DP and DM

lines to VBUS or ground

• Integrated 24MHz Crystal Oscillator supports

either crystal operation or 24MHz external clock

input

• Internal PLL for 480MHz Hi-Speed USB operation

• Supports Hi-Speed USB and legacy USB 1.1

devices

• 55mA Unconfigured Current (typical) - ideal for

bus powered applications

• 83uA suspend current (typical) - ideal for battery

powered applications

• Full Commercial operating temperature range

from 0

C to +70C

• 40 pin QFN RoHS compliant package

(6 x 6 x 0.9mm height)

Functional Overview

The USB3450 is a highly integrated USB transceiver

system. It contains a complete Hi-Speed PHY with the

UTMI+ industry standard interface to support fast time

to market for a USB controller. The USB3450 is com-

posed of the functional blocks shown below.

USB3450 Block Diagram

UTMI+

Digital

24 MHz

XTAL

Internal

Regulator &

POR

Bias

Gen.

XCVRSEL[1:0]

VDD3.3

XTAL &

PLL

VDD3.3

DP

DM

USB3450

RBIAS

Mini-AB

USB

Connector

HS XCVR

FS/LS

XCVR

Resistors

TERMSEL

TXREADY

SUSPENDN

TXVALID

RESET

RXACTIVE

OPMODE[1:0]

CLKOUT

LINESTATE[1:0]

HOSTDISC

DATA[7:0]

HOST

RXERROR

USB3450

Hi-Speed USB Host or Device PHY With UTMI+ Interface

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USB3450 Datasheet(PDF) 1 Page - Microchip Technology

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