Holtek HT48R05A-1, Handbook, Page: 16 / 125

D.C. Characteristics
Ta=25
°
C
Symbol Parameter
Test Conditions
Min. Typ. Max. Unit
V
DD
Conditions
V
DD
Operating Voltage
¾
f
SYS
=4MHz
2.2
¾
5.5 V
¾
f
SYS
=8MHz 3.3
¾
5.5 V
I
DD1
Operating Current (Crystal OSC)
3V
No load, f
SYS
=4MHz
¾
0.6 1.5 mA
5V
¾
2 4 mA
I
DD2
Operating Current (RC OSC)
3V
No load, f
SYS
=4MHz
¾
0.8 1.5 mA
5V
¾
2.5 4 mA
I
DD3
Operating Current
(Crystal OSC, RC OSC)
5V
No load, f
SYS
=8MHz
¾
4 8 mA
I
STB1
Standby Current (WDT Enabled)
3V
No load, system HALT
¾ ¾
5
m
A
5V
¾ ¾
10
m
A
I
STB2
Standby Current (WDT Disabled)
3V
No load, system HALT
¾ ¾
1
m
A
5V
¾ ¾
2
m
A
V
IL1
Input Low Voltage for I/O Ports,
TMR and INT
¾ ¾
0
¾
0.3V
DD
V
V
IH1
Input High Voltage for I/O Ports,
TMR and INT
¾ ¾
0.7V
DD
¾
V
DD
V
V
IL2
Input Low Voltage (RES)
¾ ¾
0
¾
0.4V
DD
V
V
IH2
Input High Voltage (RES)
¾ ¾
0.9V
DD
¾
V
DD
V
V
LVR
Low Voltage Reset
¾
LVR enabled 2.7 3 3.3 V
I
OL
I/O Port Sink Current
3V
V
OL
=0.1V
DD
4 8
¾
mA
5V V
OL
=0.1V
DD
10 20
¾
mA
I
OH
I/O Port Source Current
3V
V
OH
=0.9V
DD
-
2
-
4
¾
mA
5V V
OH
=0.9V
DD
-
5
-
10
¾
mA
R
PH
Pull-high Resistance
3V
¾
20 60 100 k
W
5V
¾
10 30 50
k
W
Chapter 1 Hardware Structure
9