USB2503A-HZH SMSC, USB2503A-HZH Datasheet - Page 11

• Manufacturer Part Number: USB2503A-HZH
• Description: IC HUB 3PORT USB COMPATBL 48-QFN
• Manufacturer: SMSC
• Type: Integrated USB Compatible 3 Port Hubr

Specifications of USB2503A-HZH

• Controller Type: USB Hub
• Interface: Serial EEPROM
• Voltage - Supply: 1.62 V ~ 3.6 V
• Current - Supply: 100mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-QFN
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 638-1030

Integrated USB 2.0 Compatible 3-Port Hub
Datasheet
SMSC USB2503/USB2503A
Polarity strapping.
Serial Clock/SMB
USB Transceiver
Serial Data/SMB
EEPROM Select
Input/External
Clock Input
Programming
Over Current
Chip Select /
CFG_SEL1
Port Power
Crystal
NAME
NAME
Sense
Select
Clock
SMB
Data
Bias
0
1
1
&
SDA/SMBDATA
PRTPWR_POL
CFG_SEL0
SCL/SMBCLK/
SYMBOL
OCS[3:1]_N
XTAL1/
CFG_SEL0
CFG_SEL1
CLKIN
SYMBOL
RBIAS
X
0
1
Table 4.1 3-Port Hub Pin Descriptions (continued)
Table 4.2 SMBus or EEPROM Interface Behavior
Configured as an SMBus slave for external download of user-defined
descriptors. SMBus slave address is :0101101
Internal Default Configuration via strapping options.
2-wire (I2C) EEPROMS are supported, and CFG_SEL0 has no other
functionality.
SMBus or EEPROM interface behavior.
IOSD12
IOSD12
Table 4.3 Miscellaneous Pins
SERIAL PORT INTERFACE
TYPE
I/O12
ICLKx
TYPE
IPU
I-R
I
DATASHEET
Port Power Polarity strapping determination for the active
signal polarity of the PRTPWR[3:1] pins.
While RESET_N is asserted, the logic state of this pin will
(though the use of internal combinatorial logic) determine
the active state of the PRTPWR[3:1] pins in order to ensure
that downstream port power is not inadvertently enabled to
inactive ports during a hardware reset.
When RESET_N is negated, the logic value will be latched
internally, and will retain the active signal polarity for
PRTPWR[3:1] pins.
‘1’ = PRTPWR[3:1] pins have an active ‘high’ polartity
‘0’ = PRTPWR[3:1] pins have an active ‘low’ polarity
Input from external current monitor indicating an over-
current condition. {Note: Contains internal pull-up to 3.3V
supply}
A 12.0k Ω ( +/− 1%) resistor is attached from ground to this
pin to set the transceiver’s internal bias settings.
(Serial Data)/(SMB Data) signal.
(Serial Clock)/(SMB Clock) signal. This multifunction pin is
read on the rising edge of RESET_N negation and will
determine the hub configuration method as described in
Table
This pin is read on the rising edge of RESET_N negation
and will detemine the hub configuration method as
described in
11
24MHz crystal or external clock input.
This pin connects to either one terminal of the crystal or
to an external 24MHz clock when a crystal is not used.
4.2.
Table
4.2.
FUNCTION
FUNCTION
Revision 2.3 (08-27-07)