USB2502-HT SMSC, USB2502-HT Datasheet - Page 34

• Manufacturer Part Number: USB2502-HT
• Description: CONTROLLER, HUB, USB2.0, 2PORT, 36QFN
• Manufacturer: SMSC

Specifications of USB2502-HT

• Supply Voltage Range: 1.62V To 1.98V, 3V To 3.6V
• Digital Ic Case Style: TQFP
• No. Of Pins: 48
• Operating Temperature Range: 0°C To +70°C
• Supply Voltage Max: 3.6V
• Supply: RoHS Compliant
• Package / Case: TQFP
• Data Rate Max: 480Mbps
• Rohs Compliant: Yes

Revision 2.3 (08-27-07)
5.6.1.2
NAME
NAME
RESET_N
t6
t7
t8
t1
t2
t3
t4
t5
t6
t7
VSS
Hardware
asserted
Host acknowledges attach and signals USB
Reset.
USB Idle.
Completion time for requests (with or without data
stage).
RESET_N Asserted.
Hub Recovery/Stabilization.
EEPROM Read / Hub Config.
USB Attach (See Note).
Host acknowledges attach and signals USB
Reset.
USB Idle.
Completion time for requests (with or without data
stage).
reset
Notes:
RESET_N for EEPROM Configuration
Notes:
When in Bus-Powered mode, the Hub and its associated circuitry must not consume more than
100mA from the upstream USB power source during t1+t5.
All Power Supplies must have reached the operating levels mandated in
Parameters", prior to (or coincident with) the assertion of RESET_N.
When in Bus-Powered mode, the Hub and its associated circuitry must not consume more than
100mA from the upstream USB power source during t4+t5+t6+t7.
Table 5.5 Reset_N Timing for Default/Strap Option Mode (continued)
Read Strap
t1
Options
DESCRIPTION
DESCRIPTION
Figure 5.3 Reset_N Timing for EEPROM Mode
Table 5.6 Reset_N Timing for EEPROM Mode
Read EEPROM
Set Options
t2
+
DATASHEET
t4
t3
34
Upstream
Attach
USB
MIN
MIN
100
100
1
USB Reset
recovery
t5
undefined
undefined
TYP
TYP
2.0
t6
Idle
2-Port USB 2.0 Hub Controller
Section Chapter 7, "DC
MAX
MAX
99.5
500
100
5
5
t7
completion
response
request
SMSC USB2502
Start
UNITS
UNITS
Datasheet
msec
msec
msec
msec
msec
msec
msec
msec
μ sec
μ sec