Datasheet
Electrical Specifications
3.3V DC Electrical Characteristics
MC68HC908LJ24/LK24 — Rev. 2.1 Data Sheet
Freescale Semiconductor Electrical Specifications 439
24.7 3.3V DC Electrical Characteristics
Notes:
1. V
DD
= 4.5 to 5.5 Vdc, V
SS
= 0 Vdc, T
A
= T
L
to T
H
, unless otherwise noted.
2. Typical values reflect average measurements at midpoint of voltage range, 25 °C only.
3. Run (operating) I
DD
measured using external square wave clock source. All inputs 0.2 V from rail. No dc loads. Less than
100 pF on all outputs. C
L
= 20 pF on OSC2. All ports configured as inputs. OSC2 capacitance linearly affects run I
DD
.
4. Wait I
DD
measured using external square wave clock source. All inputs 0.2 V from rail. No dc loads. Less than 100 pF on
all outputs. C
L
= 20 pF on OSC2. All ports configured as inputs. OSC2 capacitance linearly affects wait I
DD
.
5. The 8kHz clock is from a 32kHz external square wave clock input at OSC1, for the driving the RTC. Due to loading effects,
the I
DD
values will be larger when a 32kHz crystal circuit is connected.
6. LCD driver configured for low current mode.
7. Maximum is highest voltage that POR is guaranteed.
8. If minimum V
DD
is not reached before the internal POR reset is released, RST must be driven low externally until minimum
V
DD
is reached.
9. R
PU1
and
R
PU2
are measured at
V
DD
= 5.0V
Table 24-5. 3.3V DC Electrical Characteristics
Characteristic
(1)
Symbol Min Typ
(2)
Max Unit
Output high voltage (I
LOAD
= –1.0 mA)
All ports
V
OH
V
DD
–0.4
——V
Output low voltage
(I
LOAD
= 0.8mA) All ports
(I
LOAD
= 10.0 mA) PTB0–PTB5, PTC0–PTC7,
PTE0–PTE7, PTF0–PTF7
V
OL
——0.4V
Input high voltage
All ports, RST
, IRQ, OSC1
V
IH
0.7 ×
V
DD
—
V
DD
V
Input low voltage
All ports, RST
, IRQ, OSC1
V
IL
V
SS
—
0.3 ×
V
DD
V
V
DD
supply current
Run
(3)
, f
OP
= 4 MHz
with all modules on
with ADC on
with ADC off
Wait
(4)
, f
OP
= 4 MHz (all modules off)
Stop, f
OP
= 8 kHz
(5)
with OSC, RTC, LCD
(6)
, LVI on
with OSC, RTC, LCD
(6)
on
with OSC, RTC on
all modules off
I
DD
—
—
—
—
—
—
—
—
5.5
4.5
3
1.5
180
15
2.5
—
8
6
5
2.5
250
20
4
1
mA
mA
mA
mA
µA
µA
µA
µA
Digital I/O ports Hi-Z leakage current
All ports, RST
I
IL
——± 10 µA
Input current
IRQ
I
IN
——± 1 µA