mcf51em256 Freescale Semiconductor, Inc, mcf51em256 Datasheet - Page 17

• Manufacturer Part Number: mcf51em256
• Description: Microcontrollers Covers Mcf51em256 Mcf51em128
• Manufacturer: Freescale Semiconductor, Inc

2.2
Absolute maximum ratings are stress ratings only, and functional operation at the maxima is not
guaranteed. Stress beyond the limits specified in
damage to the device. For functional operating conditions, refer to the remaining tables in this section.
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 (for instance, either V
Freescale Semiconductor
P
C
D
T
Absolute Maximum Ratings
1
2
Supply voltage
Input voltage
Instantaneous maximum current
Single pin limit (applies to all port pins except PTB1
and PTB3)
Instantaneous maximum current
Single pin limit (applies to PTB1 and PTB3)
Maximum current into V
Storage temperature
Those parameters are guaranteed during production testing on each individual device.
Those parameters are achieved by the design characterization by measuring a statistically relevant
sample size across process variations.
Those parameters are achieved by design characterization on a small sample size from typical devices
under typical conditions unless otherwise noted. All values shown in the typical column are within this
category.
Those parameters are derived mainly from simulations.
Input must be current limited to the value specified. To determine the value of the required
current-limiting resistor, calculate resistance values for positive (V
voltages, then use the larger of the two resistance values.
All functional non-supply pins are internally clamped to V
The classification is shown in the column labeled “C” in the parameter
tables where appropriate.
1
,
2
MCF51EM256 Series ColdFire Microcontroller Data Sheet, Rev.3
,
3
Rating
Preliminary—Subject to Change Without Notice
DD
Table 6. Absolute Maximum Ratings
Table 5. Parameter Classifications
Table 6
4
NOTE
,
5
,
6
may affect device reliability or cause permanent
Symbol
T
V
V
I
I
I
DD
stg
DD
SS
D
D
In
and V
DD
DD
–0.3 to V
) and negative (V
.
–0.3 to 4.0
–55 to 150
SS
Value
120
±25
±50
or V
DD
+ 0.3
DD
Electrical Characteristics
).
SS
) clamp
Unit
mA
mA
mA
°C
V
V
17