AT43301-SU Atmel, AT43301-SU Datasheet - Page 5

• Manufacturer Part Number: AT43301-SU
• Description: IC USB HUB CTRLR 4PORT 24SOIC
• Manufacturer: Atmel

Specifications of AT43301-SU

• Controller Type: USB Hub
• Interface: Serial
• Voltage - Supply: 4.4 V ~ 5.25 V
• Current - Supply: 24mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 1-3.
1137J–USB–01/06
CEXT1
DP0
DM0
DP[1:4]
DM[1:4]
LFT
LPSTAT
48
OSC1
OSC2
OVC
PWR
SELF/BUS
STAT
TEST
VCC
VSS
NC
Signal Descriptions
O
B
B
B
B
I
I
I
I
O
I
O
I
O
I
V
V
-
External Capacitor. For proper operation of the on-chip regulator, a 0.27 µF capacitor must be connected to
CEXT1.
Upstream Plus USB I/O. This pin should be connected to the CEXT1 pin through an external 1.5 kΩ pull-up
resistor. DP0 and DM0 form the differential signal pin pairs connected to the USB host controller or an
upstream Hub.
Upstream Minus USB I/O.
Port Plus USB I/O. This pin should be connected to VSS through an external 15 kΩ resistor. DP[1:4] and DM[1:4]
are the differential signal pin pairs to connect downstream USB devices.
Port Minus USB I/O. This pin should be connected to VSS through an external 15 kΩ resistor.
PLL Filter. For proper operation of the PLL, this pin should be connected through a 2.2 nF capacitor in parallel
with a 100Ω resistor in series with a 10 nF capacitor to ground (VSS).
Local Power Status. Schmitt Trigger input pin that is used in the self-powered mode to indicate the condition of the
local power supply. This pin should be connected to the local power supply through a 100 kΩ resistor.
48 MHz Select, 32-lead LQFP only. This pin sets the clock input to the AT43301-AC. If it is tied low, a 48 MHz
clock must be input to OSC1. If it is tied high (to CEXT1 or to 5V through a 47 kΩ resistor), a 6 MHz crystal must
be connected between OSC1 and OSC2, or a 6 MHz clock input to OSC1.
Oscillator Input. Input to the inverting 6 MHz oscillator amplifier.
Oscillator Output. Output of the inverting oscillator amplifier.
Port Overcurrent. This is the Schmitt Trigger input signal used to indicate to the AT43301 that there is a power
supply problem with the ports. If OVC is asserted, the AT43301 will de-assert PWR and report the status to the
USB Host.
Power Switch. This is an output signal to enable or disable the external port power switch for the port power
supply. PWR is de-asserted when an overcurrent is detected at OVC.
Power Mode. Schmitt Trigger input pin to set power mode of hub. If high, the AT43301 works in the self-powered
mode. If low, the bus-powered mode.
Status. Output pin which is asserted by the AT43301 whenever it is enumerated. STAT is de-asserted when the
hub enters the suspend state. An LED in series with a resistor can be connected to this pin to provide visual
feedback to the user.
Test. This pin has an internal pull up and should be left unconnected in the normal operating mode.
5V Power Supply from the USB.
Ground.
No Connect. This pin should be left unconnected.
AT43301
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