8.3 Standard Operating Conditions

For all other device characteristics to be valid, the device must operate within the ratings listed in this section.

Table 8-2. Standard Operating Conditions
Parameter		Ratings	Units
V_DD - Operating Supply Voltage⁽¹⁾
Industrial temperature	V_DD (3.3V)	+3.135 to +3.465	V
Industrial temperature	V_DD (5.0V)	+4.75 to +5.25	V
V_DDUREG - Operating Supply Voltage to use internal USB Regulator^(1,3)
Industrial temperature	V_DDUREGMIN	+3.9	V
Industrial temperature	V_DDUREGMAX	+5.25	V
V_USB - SupplyVoltage for the USB Transceiver^(1,3)
Industrial temperature	V_USB	+3.3	V
V_BUS - Voltage for detecting whether the device is on USB Bus or not⁽¹⁾
Industrial temperature	V_BUSMIN	+2.85	V
Industrial temperature	V_BUSMAX	+3.15	V
f_USB - USB Input Clock Frequency
Industrial temperature	f_USBMIN	47.88	MHz
Industrial temperature	f_USBMAX	48.12	MHz
C_VUSB - External Capacitor Value on V_USB⁽²⁾
Industrial temperature	C_VUSB	470	nF
T_A - Operating Ambient Temperature Range
	T_{A_MIN}	-40	°C
	T_{A_MAX}	+85	°C
Note: Refer to the Supply Voltage parameter in the Supply Voltage section. Use a ceramic or film capacitor to ensure a sufficiently low ESR between 0.5Ω and 4.0Ω. When 3.9V ≤ V_DD ≤ 5.25V, the internal USB regulator is ON, and the V_USB pin must be connected to an external capacitor (C_VUSB). When 3.135V ≤ V_DD < 3.9V, 3.3V must be provided externally on the V_USB pin.