
Electrical Specifications
Technical Data
MC68HC912DG128 — Rev 3.0
388
Electrical Specifications
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MOTOROLA
Ram standby current
I
sb
—
50
μ
A
DC injection current
(3)
(4)
(5)
(6)
(7)
(V
NEGCLAMP
=V
SS
–0.3V, V
POSTCLAMP
=V
DDE
+0.3)
Steady state single pin limit
Steady state package limit includes sum of all stressed pins (25
pins max.)
Transient single pin limit
Transient package limit includes sum of all stressed pins (25 pins
max.)
I
ICsss
I
ICssP
I
ICTRs
I
ICTRP
–0.5
–10
–25
–25
0.5
10
25
25
mA
1. Specification is for parts in the -40 to +85
°
C range. Higher temperature ranges will result in increased
current leakage.
2. See
Table 19-5
.
3. It is recommended to tie V
DD
if standby mode is not being used.
4. All functional no-supply pins are internally clamped to V
SS
and V
DD
or V
SS
and V
DDX
.
5. Input must be current limited to the 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.
6. Power supply must maintain regulation within operating V
DD
or V
DDX
range during instantaneous and operating maximum
current conditions. If positive injection current (V
in
>V
DD
or V
in
>V
DDX
) is greater than I
DD
or I
DDX
, injection current may flow
out of V
DD
/V
DDX
and could result in external power supply going out of regulation. Ensure external V
DD
/V
DDX
load will shunt
current greater than maximum injection current. This will be the greatest risk when the MCU is not consuming power. Ex-
amples are: if no system clock is present, or if clock rate is very low, which would reduce overall power consumption.
7. Current injection specification does not include ATD pins.
Table 19-3. DC Electrical Characteristics
V
DD
=
5.0 Vdc
±
10%, V
SS
=
0 Vdc, T
A
=
T
L
to T
H
, unless otherwise noted
Characteristic
Symbol
Min
Max
Unit
F
Freescale Semiconductor, Inc.
n
.