MCF52223_07 Datasheet, PDF (27/56 Pages) Freescale Semiconductor, Inc – ColdFire Microcontroller

2.1
Electrical Characteristics
Maximum Ratings
Table 18. Absolute Maximum Ratings^{1, 2}
Rating
Symbol
Value
Unit
Supply voltage
Clock synthesizer supply voltage
RAM standby supply voltage
USB standby supply voltage
Digital input voltage ³
EXTAL pin voltage
XTAL pin voltage
Instantaneous maximum current
Single pin limit (applies to all pins)^{4, 5}
V_DD
–0.3 to +4.0
V
V_DDPLL
–0.3 to +4.0
V
V_STBY
–0.3 to +4.0
V
V_DDUSB
–0.3 to +4.0
V
V_IN
–0.3 to +4.0
V
V_EXTAL
0 to 3.3
V
V_XTAL
0 to 3.3
V
I_DD
25
mA
Operating temperature range (packaged)
T_A
–40 to 85
°C
(T_L - T_H)
Storage temperature range
T_stg
–65 to 150
°C
1 _{Functional operating conditions are given in DC Electrical Specifications. Absolute Maximum Ratings}
are stress ratings only, and functional operation at the maxima is not guaranteed. Stress beyond
those listed may affect device reliability or cause permanent damage to the device.
2 _{This device contains circuitry protecting against damage due to high static voltage or electrical fields;}
however, it is advised that normal precautions be taken to avoid application of any voltages higher
than maximum-rated voltages to this high-impedance circuit. Reliability of operation is enhanced if
unused inputs are tied to an appropriate logic voltage level (V_SS or V_DD).
3 _{Input must be current limited to the IDD value specified. To determine the value of the required}
current-limiting resistor, calculate resistance values for positive and negative clamp voltages, then
use the larger of the two values.
4 _{All functional non-supply pins are internally clamped to VSS and VDD.}
5 _{The power supply must maintain regulation within operating VDD range during instantaneous and}
operating maximum current conditions. If positive injection current (V_in > V_DD) is greater than I_DD, the
injection current may flow out of V_DD and could result in the external power supply going out of
regulation. Ensure that the external V_DD load shunts current greater than maximum injection current.
This is the greatest risk when the MCU is not consuming power (e.g., no clock).
MCF52223 ColdFire Microcontroller, Rev. 2
Freescale Semiconductor
27