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ISP1520 Datasheet(PDF) 6 Page - NXP Semiconductors

Part No. ISP1520
Description  Hi-Speed Universal Serial Bus hub controller
Download  51 Pages
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

ISP1520 Datasheet(HTML) 6 Page - NXP Semiconductors

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Philips Semiconductors
ISP1520
Hi-Speed USB hub controller
Product data
Rev. 02 — 04 May 2004
6 of 51
9397 750 11689
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
RREF
7
AI
reference resistor connection; connect this pin through a
resistor of 12 k
Ω± 1 % to an analog band gap ground
reference
TEST_HIGH
8
-
test pin; connect to 3.3 V
VCC1
9
-
analog supply voltage 1 (3.3 V)
GND
10
-
ground supply
VCC4
11
-
crystal and PLL supply voltage 4 (3.3 V)
TEST_HIGH
12
-
test pin; connect to 3.3 V
VCC2
13
-
transceiver supply voltage 2 (3.3 V)
GND
14
-
ground supply
DM1
15
AI/O
downstream facing port 1 D
− connection (analog)[3]
DP1
16
AI/O
downstream facing port 1 D+ connection (analog)[3]
TEST_LOW
17
-
connect to GND
TEST_HIGH
18
-
connect to
+5.0 V through a 10 kΩ resistor
OC1_N
19
AI/I
overcurrent sense input for downstream facing port 1
(analog/digital)
PSW1_N
20
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
GND
21
-
ground supply
GND
22
-
ground supply
VCC3
23
-
digital supply voltage 3 (3.3 V)
VREF(5V0)
24
-
reference voltage (5 V
± 5 %); used to power internal pull-up
resistors of PSWn_N pins and also for the analog
overcurrent detection
OC4_N
25
AI/I
overcurrent sense input for downstream facing port 4
(analog/digital)
PSW4_N
26
I/O
output — power switch control output (open-drain) with an
internal pull-up resistor for downstream facing port 4
input — function of the pin when used as an input is given in
Table 5
OC3_N
27
AI/I
overcurrent sense input for downstream facing port 3
(analog/digital)
PSW3_N
28
I/O
output — power switch control output (open-drain) with an
internal pull-up resistor for downstream facing port 3
input — function of the pin when used as an input is given in
Table 5
OC2_N
29
AI/I
overcurrent sense input for downstream facing port 2
(analog/digital)
PSW2_N
30
I/O
output — power switch control output (open-drain) with an
internal pull-up resistor for downstream facing port 2
input — function of the pin when used as an input is given in
Table 5
Table 2:
Pin description[1]…continued
Symbol[2]
Pin
Type
Description


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