USB2504-JD Standard Microsystems Corp., USB2504-JD Datasheet - Page 14

• Manufacturer Part Number: USB2504-JD
• Description: Interface, Integrated USB2.0 Compatible 4-Port Hub
• Manufacturer: Standard Microsystems Corp.

Revision 1.3 (06-28-04)
VDDAPLL3P3
VDDAPLL1P8
Internal 1.8V
Self-Power /
Analog Test
Bus-Power
TEST Pins
VDDIO3P3
VDDA3P3
regulator
VDD1P8
BUFFER
voltage
NAME
enable
NAME
Detect
VSS
IPD
IPU
IS
&
I
Input.
Input, 40kΩ - 100kΩ Internal pull-down.
Input, 40kΩ - 100kΩ Internal pull-up.
Input with Schmitt trigger.
VDDA33PLL
VDDA18PLL
SELF_PWR
TEST[1:0]
SYMBOL
SYMBOL
REG_EN
VDDA33
ATEST/
VDD18
VDD33
VSS
Table 4.4 Power, Ground, and No Connect
Table 4.3 Miscellaneous Pins (continued)
Table 4.5 Buffer Type Descriptions
TYPE
TYPE
AIO
IPD
I
8
Detects availability of local self-power source.
Low = Self/local power source is NOT available (i.e., Hub
gets all power from Upstream USB VBus).
High = Self/local power source is available.
Used for testing the chip. User must treat as a no-
connect or connect to ground.
This signal is used for testing the analog section of the
chip, and to enable or disable the internal 1.8v regulator.
This pin must be connected to VDDA33 to enable the
internal 1.8V regulator, or to VSS to disable the internal
regulator.
When the internal regulator is enabled, the 1.8V power
pins must be left unconnected, except for the required
bypass capacitors.When the PHY is in test mode, the
internal regulator is disabled and the ATEST pin
functions as a test pin.
+1.8V core power.
If the internal regulator is enabled, then VDD18 pin 54
must have a 4.7
capacitor to VSS
+3.3V Filtered analog power for the internal PLL
If the internal PLL 1.8V regulator is enabled, then this pin
acts as the regulator input
+1.8V Filtered analog power for internal PLL.
If the internal regulator is enabled, then this pin must
have a 4.7
to VSS
+3.3V I/O power.
+3.3V Filtered analog power.
Ground.
DESCRIPTION
µ
F (or greater) ±20% (ESR <0.1
µ
F (or greater) ±20% (ESR <0.1
Integrated USB2.0 Compatible 4-Port Hub
FUNCTION
FUNCTION
Ω)
SMSC USB2504
capacitor
Datasheet
Ω)