Datasheet

MC68HC908QB8 Data Sheet, Rev. 3
Freescale Semiconductor 207
Chapter 18
Electrical Specifications
18.1 Introduction
This section contains electrical and timing specifications.
18.2 Absolute Maximum Ratings
Maximum ratings are the extreme limits to which the microcontroller unit (MCU) can be exposed without
permanently damaging it.
NOTE
This device is not guaranteed to operate properly at the maximum ratings.
Refer to 18.5 5-V DC Electrical Characteristics and 18.8 3-V DC Electrical
Characteristics for guaranteed operating conditions.
NOTE
This device contains circuitry to protect the inputs against damage due to
high static voltages or electric fields; however, it is advised that normal
precautions be taken to avoid application of any voltage higher than
maximum-rated voltages to this high-impedance circuit. For proper
operation, it is recommended that V
IN
and V
OUT
be constrained to the
range V
SS
≤ (V
IN
or V
OUT
) ≤ V
DD
. Reliability of operation is enhanced if
unused inputs are connected to an appropriate logic voltage level (for
example, either V
SS
or V
DD
.)
Characteristic
(1)
1. Voltages references to V
SS
.
Symbol Value Unit
Supply voltage V
DD
–0.3 to +6.0 V
Input voltage V
IN
V
SS
–0.3 to V
DD
+0.3 V
Mode entry voltage, IRQ
pin V
TST
V
SS
–0.3 to +9.1 V
Maximum current per pin excluding
PTA0–PTA5, V
DD
, and V
SS
I±15mA
Maximum current for pins PTA0–PTA5 I
PTA0—
I
PTA5
±25 mA
Storage temperature T
STG
–55 to +150 °C
Maximum current out of V
SS
I
MVSS
100 mA
Maximum current into V
DD
I
MVDD
100 mA