USB3450 datasheet(17/40 Pages) SMSC

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

Datasheet

SMSC USB3450

Revision 0.1 (05-11-05)

DATASHEET

Table 5.4 DC Electrical Characteristics: Analog I/O Pins (DP/DM)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

FS FUNCTIONALITY

Input levels

Differential Receiver Input

Sensitivity

VDIFS

| V(DP) - V(DM) |

0.2

Differential Receiver

Common-Mode Voltage

VCMFS

0.8

2.5

Single-Ended Receiver Low

Level Input Voltage

VILSE

0.8

Single-Ended Receiver High

Level Input Voltage

VIHSE

2.0

Single-Ended Receiver

Hysteresis

VHYSSE

0.050

0.150

Output Levels

Low Level Output Voltage

VFSOL

Pull-up resistor on DP;

RL = 1.5kΩ to VDD3.3

0.3

High Level Output Voltage

VFSOH

Pull-down resistor on DP,

DM;

RL = 15kΩ to GND

2.8

3.6

Termination

Driver Output Impedance for

HS and FS

ZHSDRV

Steady state drive

40.5

49.5

Input Impedance

ZINP

TX, RPU disabled

1.0

MΩ

Pull-up Resistor Impedance

ZPU

Bus Idle

0.900

1.24

1.575

kΩ

Pull-up Resistor Impedance

ZPURX

Device Receiving

1.425

2.26

3.09

kΩ

Pull-dn Resistor Impedance

ZPD

14.25

15.0

15.75

kΩ

HS FUNCTIONALITY

Input levels

HS Differential Input

Sensitivity

VDIHS

| V(DP) - V(DM) |

100

HS Data Signaling Common

Mode Voltage Range

VCMHS

-50

500

HS Squelch Detection

Threshold (Differential)

VHSSQ

Squelch Threshold

100

Un-squelch Threshold

150

Output Levels

Hi-Speed Low Level

Output Voltage (DP/DM

referenced to GND)

VHSOL

45Ω load

-10

Hi-Speed High Level

Output Voltage (DP/DM

referenced to GND)

VHSOH

45Ω load

360

440

USB3450 Datasheet(PDF) 17 Page - SMSC Corporation

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