ISP1521 datasheet(6/53 Pages) PHILIPS

6 / 53 page

Philips Semiconductors

ISP1521

Hi-Speed USB hub controller

Product data

Rev. 03 — 24 November 2004

6 of 53

9397 750 13702

DP0

AI/O

upstream facing port 0 D+ connection (analog)

RPU

pull-up resistor connection; connect this pin through a resistor of

1.5 k

Ω± 5 % to 3.3 V

GND

ground supply

RREF

reference resistor connection; connect this pin through a resistor

of 12 k

Ω± 1 % to an analog band gap ground reference

GND

ground supply

DM5

AI/O

downstream facing port 5 D

− connection (analog)[3]

DP5

AI/O

downstream facing port 5 D+ connection (analog)[3]

VCC1

analog supply voltage 1 (3.3 V)

GND

ground supply

VCC4

crystal and PLL supply voltage 4 (3.3 V)

GND

ground supply

DM6

AI/O

downstream facing port 6 D

− connection (analog)[3]

DP6

AI/O

downstream facing port 6 D+ connection (analog)[3]

VCC2

transceiver supply voltage 2 (3.3 V)

GND

ground supply

DM1

AI/O

downstream facing port 1 D

− connection (analog)[4]

DP1

AI/O

downstream facing port 1 D+ connection (analog)[4]

TEST_LOW

connect to GND

TEST_HIGH

connect to 5.0 V through a 10 k

Ω resistor

OC1_N

AI/I

overcurrent sense input for downstream facing port 1

(analog/digital)

PSW1_N

I/O

output — power switch control output (open-drain) with an

internal pull-up resistor for downstream facing port 1

input — function of the pin when used as an input is given in

Table 5

OC6_N

AI/I

overcurrent sense input for downstream facing port 6

(analog/digital)

PSW6_N

I/O

output — power switch control output (open-drain) with an

internal pull-up resistor for downstream facing port 6

input — function of the pin when used as an input is given in

Table 5

OC5_N

AI/I

overcurrent sense input for downstream facing port 5

(analog/digital)

PSW5_N

I/O

output — power switch control output (open-drain) with an

internal pull-up resistor for downstream facing port 5

input — function of the pin when used as an input is given in

Table 5

GND

ground supply

VCC3

digital supply voltage 3 (3.3 V)

VREF(5V0)

reference voltage (5 V

± 5 %); used to power internal pull-up

resistors of PSWn_N pins and also for the analog overcurrent

detection

Table 2:

Pin description[1]…continued

Symbol[2]

Type Description

ISP1521 Datasheet(PDF) 6 Page - NXP Semiconductors

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