Datasheet

 2010 - 2015 Microchip Technology Inc. DS00001692C-page 39
USB251xB/xBi
6.0 DC PARAMETERS
6.1 Maximum Ratings
6.2 Operating Conditions
Parameter Symbol MIN MAX Units Comments
Storage
Temperature
T
STOR
-55 150 °C
Lead
Temperature
Refer to
JEDEC Specification J-STD-
020D [5]
3.3 V supply
voltage
VDD33
VDDA33
4.6 V Applies to all packages
Voltage on any
I/O pin
-0.5 5.5 V
Voltage on
XTALIN
-0.5 4.0 V
Voltage on
XTALOUT
-0.5 2.5 V
Note 6-1
• Stresses above the specified parameters could cause permanent damage to the device. This is a stress rating
only. Therefore, functional operation of the device at any condition above those indicated in the operation sec-
tions of this specification are not implied.
• When powering this device from laboratory or system power supplies, it is important that the absolute maximum
ratings not be exceeded or device failure can result. Some power supplies exhibit voltage spikes on their outputs
when the AC power is switched on or off. In addition, voltage transients on the AC power line may appear on the
DC output. When this possibility exists, it is suggested that a clamp circuit be used.
Parameter Symbol MIN MAX Units Comments
Extended Commercial
Operating Temperature
T
AE
0 85 °C Ambient temperature in still air
Industrial
Operating Temperature
T
AI
-40 85 °C Ambient temperature in still air
Only applies to USB251xBi products
3.3 V supply voltage VDD33
VDDA33
3.0 3.6 V Applies to all parts
3.3 V supply rise time t
RT33
0400sSee Figure 6-1 and Note 6-2
Voltage on any I/O pin -0.3 5.5 V If any 3.3 V supply voltage drops
below 3.0 V, then the MAX
becomes:
(3.3 V supply voltage) + 0.5
Voltage on XTALIN -0.3 VDD33 V