USB2504A-JT Standard Microsystems (SMSC), USB2504A-JT Datasheet - Page 35

• 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
5.6.1.1
NAME
RESET_N
Strap Pins
t1
t2
t3
t4
t5
t6
t7
t8
VSS
VSS
Hardware
asserted
reset
RESET_N Asserted.
Strap Setup Time
Strap Hold Time.
hub outputs driven to inactive logic states
USB Attach (See Note).
Host acknowledges attach and signals USB
Reset.
USB Idle.
Completion time for requests (with or without data
stage).
RESET_N for Strapping Option Configuration
Notes:
Don’t Care
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.
Read Strap
t1
Options
Figure 5.2 Reset_N Timing for Default/Strap Option Mode
Table 5.5 Reset_N Timing for Default/Strap Option Mode
DESCRIPTION
t2
Valid
t3
t4
Don’t Care
Drive Strap
Outputs to
inactive
DATASHEET
levels
t5
35
Upstream
Attach
USB
Driven by Hub if strap is an output.
16.7
16.7
MIN
100
1
USB Reset
recovery
t6
undefined
TYP
2.0
t7
Idle
Section Chapter 8, "DC
MAX
1400
100
1.5
Revision 2.3 (08-27-07)
5
t8
completion
response
request
Start
UNITS
msec
msec
msec
msec
μsec
nsec
nsec
μsec