USB2514I-AEZG Ver la hoja de datos (PDF) - SMSC -> Microchip

Número de pieza

componentes Descripción

Lista de partido

USB2514I-AEZG

Industrial Temperature Rated USB 2.0 High-Speed 4-Port Hub Controller

SMSC -> Microchip 

SYMBOL

SUSP_IND/

LOCAL_PWR/

NON_REM0

TEST

SEL48

REG_EN

Industrial Temperature Rated USB 2.0 High-Speed 4-Port Hub Controller

Datasheet

Table 3.1 USB2514 Pin Descriptions (continued)

36 QFN 48 QFN

28

39

11

14

n/a

40

n/a

11

BUFFER

TYPE

DESCRIPTION

I/O

Active/Suspend status LED or Local-Power & Non

Removable Strap Option

Suspend Indicator: Indicates USB state of the hub.

‘negated’ = Unconfigured, or configured and in USB

Suspend

‘asserted’ = Hub is configured, and is active (i.e., not in

suspend)

Local Power: Detects availability of local self-power

source.

Low = Self/local power source is NOT available (i.e.,

Hub gets all power from Upstream USB VBus).

High = Self/local power source is available.

NON_REM0 Strap Option:

If this strap is enabled by package and configuration

settings (see Table 3.2), this pin will be sampled (in

conjunction with NON_REM1) at RESET_N negation to

determine if ports [4:1] contain permanently attached

(non-removable) devices. Also, the active state of the

LED will be determined as follows:

NON_REM[1:0] = ‘00’, All ports are removable, and the

LED is active high

NON_REM[1:0] = ‘01’, Port 1 is nonremovable, and the

LED is active low

NON_REM[1:0] = ‘10’, Ports 1 & 2 are non-removable,

and the LED is active high

NON_REM[1:0] = ‘11’, Ports 1, 2 & 3 are non-

removable, and the LED is active low

IPD

TEST pin

XNOR continuity tests all signal pins on the hub, please

contact your SMSC representative for a detailed

description of how this test mode is enabled and utilized.

I

Select 48 MHz clock input

48MHz external clock input select. When the hub is

clocked from an external clock source, this pin selects

either 24MHz or 48MHz mode.

‘0’ = 24MHz

‘1’ = 48MHz

IPU

Regulator Enable

REG_EN: This pin is internally pulled up to enable the

internal 1.8V regulators, and this pin should be treated

as a no-connect.

In order to disable the regulators, this pin will need to be

externally connected to ground.

When the internal regulator is enabled, the 1.8V power

pins must be left unconnected, except for the required

bypass capacitors.

Revision 1.98 (11-19-07)

14

DATASHEET

SMSC USB2514i

Share Link: