ISP1521BEUM ST-Ericsson Inc, ISP1521BEUM Datasheet - Page 15

• Manufacturer Part Number: ISP1521BEUM
• Description: IC USB HUB CONTROLLER HS 80-LQFP
• Manufacturer: ST-Ericsson Inc

Specifications of ISP1521BEUM

• Controller Type: USB Hub
• Interface: I²C
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 80-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Other names: 568-1884-2; ISP1521BE,518; ISP1521BE-T

Table 6.
CD00222695
Product data sheet
Power switching mode
None
Global
Individual
Overcurrent protection mode pin configuration
8.1.4 Nonremovable port
8.1.5 Port indicator support
For global overcurrent protection mode, only PSW1_N and OC1_N are active; that is, in
this mode, the remaining overcurrent indicator pins are disabled. To inhibit the analog
overcurrent detection, OC_N pins must be connected to V
Both analog and digital overcurrent modes are supported; see
For digital overcurrent detection, the normal digital TTL level is accepted on overcurrent
input pins. For analog overcurrent detection, the threshold is given in
mode, to filter out false overcurrent conditions because of in rush and spikes, a dead time
of 15 ms is built into the IC, that is, overcurrent must persist for 15 ms before it is reported
to the host.
Table 7.
A nonremovable port, by definition, is a port that is embedded inside the hub application
box and is not externally accessible. The LED port indicators (pins AMBn_N) of such a
port are not used. Therefore, the corresponding amber LED port indicators are disabled to
signify that the port is nonremovable; see
More than one nonremovable port can be specified by appropriately connecting the
corresponding amber LED indicators. At least one port should, however, be left as a
removable port.
The detection of any nonremovable port sets the hub descriptor to a compound hub.
Table 8.
The port indicator support can be disabled by grounding all green port indicators (all
pins GRNn_N); see
only one port.
Pin ADOC
3.3 V or 5.0 V
Ground
AMBn_N (n = 1 to 7)
Ground
Pull-up with amber LED
NOOC
HIGH
LOW
LOW
Overcurrent detection mode selection pin configuration
Nonremovable port pin configuration
PSW1_N
ground
internal
pull-up
internal
pull-up
analog
digital
Mode selection
Table
Rev. 07 — 4 February 2010
PSW2_N
ground
ground
internal
pull-up
9. This is a global feature. You cannot disable port indicators for
PSW3_N
ground
ground
internal
pull-up
Table
Nonremovable port
nonremovable
removable
Description
threshold ΔV
normal digital TTL level
8.
PSW4_N
ground
ground
internal
pull-up
trip
REF(5V0)
Hi-Speed USB hub controller
PSW5_N PSW6_N
ground
ground
internal
pull-up
Table
.
© ST-ERICSSON 2010. All rights reserved.
ground
ground
internal
pull-up
7.
Section
ISP1521
14. In this
PSW7_N
ground
ground
internal
pull-up
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