USB3450 Datasheet, PDF (1/39 Pages) SMSC Corporation – HI-SPEED USB HOST OR DEVICE PHY WITH UTMI+INTERFACE

USB3450
Hi-Speed USB Host or Device PHY With UTMI+ Interface
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
VDD3.3
Internal
Regulator &
POR
24 MHz
XTAL
XTAL &
PLL
XCVRSEL[1:0]
TERMSEL
TXREADY
SUSPENDN
TXVALID
RESET
RXACTIVE
OPMODE[1:0]
CLKOUT
LINESTATE[1:0]
HOSTDISC
DATA[7:0]
HOST
RXERROR
UTMI+
Digital
HS XCVR
FS/LS
XCVR
USB3450
VDD3.3
DP
DM
Mini-AB
USB
Connector
Resistors
Bias
Gen.
RBIAS
 2005 - 2016 Microchip Technology Inc.
DS00002105A-page 1