USB2504A-JT Standard Microsystems (SMSC), USB2504A-JT Datasheet - Page 13

• Manufacturer Part Number: USB2504A-JT
• Manufacturer: Standard Microsystems (SMSC)

Specifications of USB2504A-JT

• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Operating Temperature (max): 70C
• Package Type: TQFP
• Rad Hardened: No
• Lead Free Status / RoHS Status: Compliant

Integrated USB 2.0 Compatible 4-Port Hub
Datasheet
SMSC USB2504/USB2504A
Serial Clock/SMB
Serial Data/SMB
Crystal Output
Input/External
CFG_SEL2
Clock Input
Clock Input
Programming
Programming
Programming
Configuration
Configuration
Configuration
Crystal
Enable
NAME
NAME
Select
Select
Select
Clock
X
X
X
0
1
Data
CFG_SEL1
SDA/SMBDATA
CLKIN_EN
SCL/SMBCLK
SYMBOL
XTAL1/
CFG_SEL0
CFG_SEL1
CFG_SEL2
XTAL2
CLKIN
0
0
1
1
1
SYMBOL
Table 4.1 4-Port Hub Pin Descriptions (continued)
Table 4.2 SMBus or EEPROM Interface Behavior
CFG_SEL0
0
1
0
0
1
IOSD12
IOSD12
IOSD12
Table 4.3 Miscellaneous Pins
OCLKx
SERIAL PORT INTERFACE
TYPE
ICLKx
TYPE
I
I
I
DATASHEET
SMBus or EEPROM interface behavior.
Configured as an SMBus slave for external download of user-
defined descriptors. SMBus slave address is 0101100
Configured as an SMBus slave for external download of user-
defined descriptors. SMBus slave address is 0101101
Internal Default Configuration
Internal Default Configuration via strapping options.
2-wire (I2C) EEPROMS are supported,
(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
This pin is read on the rising edge of RESET_N (see the
applicable RESET_N timing table in
determine the hub configuration method as described in
Table
This pin is read on the rising edge of RESET_N negation
and will determine the hub configuration method as
described in
13
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.
24MHz Crystal
This is the other terminal of the crystal, or left
unconnected when an external clock source is used to
drive XTAL1/CLKIN. It must not be used to drive any
external circuitry other than the crystal circuit.
Clock In Enable:
Low = XTAL1 and XTAL2 pins configured for use with
external crystal
High = XTAL1 pin configured as CLKIN, and must be
driven by an external CMOS clock.
4.2.
Table
4.2.
FUNCTION
FUNCTION
Section
Table
Revision 2.3 (08-27-07)
4.2.
5.6.1) and will