
DS89C430/DS89C44/DS89C450 Ultra-High-Speed Flash Microcontrollers 
2 of 48 
ABSOLUTE MAXIMUM RATINGS 
Voltage Range on Any Pin Relative to Ground 
Voltage Range on V
CC
 Relative to Ground 
Ambient Temperature Range (under bias) 
Storage Temperature Range 
Soldering Temperature 
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, 
and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is 
not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS 
(V
CC
 = 4.5V to 5.5V, T
O 
= -40°C to +85°C.) (Note 1) 
-0.3V to (V
CC
 + 0.5V) 
-0.3V to +6.0V 
-40°C to +85°C 
-55°C to +125°C 
See IPC/JEDEC J-STD-020A
PARAMETER 
SYMBOL 
MIN 
TYP 
MAX 
UNITS 
Supply Voltage (Notes 2, 3) 
V
CC 
4.5 
5.0 
5.5 
V 
Power-Fail Warning (Notes 2, 4) 
V
PFW
4.2 
4.375 
4.6 
V 
Reset Trip Point (Min Operating Voltage) (Notes 2, 3, 4) 
V
RST
3.95 
4.125 
4.35 
V 
Supply Current, Active Mode (Note 5) 
I
CC
75 
110 
A 
Supply Current, Idle Mode at 33MHz (Note 6) 
I
IDLE
40 
50 
A 
Supply Current, Stop Mode, Bandgap Disabled (Note 7) 
I
STOP
1 
100 
A 
Supply Current, Stop Mode, Bandgap Enabled (Note 7) 
I
SPBG
150 
300 
A 
Input Low Level (Note 2) 
V
IL
-0.3 
+0.8 
V 
Input High Level (Note 2) 
V
IH
2.0 
V
CC
 + 0.3 
V 
Input High Level XTAL and RST (Note 2) 
V
IH2
3.5 
V
CC
 + 0.3 
V 
Output Low Voltage, Port 1 and 3 at I
OL
 = 1.6mA (Note 2) 
V
OL1
0.15 
0.45 
V 
Output Low Voltage, Port 0 and 2, ALE, 
PSEN
 at I
OL
 = 3.2mA 
(Note 2) 
V
OL2
0.15 
0.45 
V 
Output High Voltage, Port 1, 2, and 3, at I
OH
 = -50 A 
(Notes 2, 8) 
V
OH1
2.4 
V 
Output High Voltage, Port 1, 2, and 3 at I
OH
 = -1.5mA (Notes 2, 9)
V
OH2
2.4 
V 
Output High Voltage, Port 0, 1, 2, ALE, 
PSEN
, 
RD
, 
WR
 in Bus 
Mode at I
OH
 = -8mA (Notes 2, 10)  
V
OH3
2.4 
V 
Output High Voltage, RST at I
OL
 = -0.4mA (Note 2, 11) 
V
OH4
2.4 
V 
Input Low Current, Port 1, 2, and 3 at 0.4V 
I
IL
-50 
A 
Transition Current from 1 to 0, Port 1, 2, and 3 at 2V (Note 12) 
I
TL
-650 
A 
Input Leakage Current, Port 0 in I/O Mode and 
EA
(Note 13) 
I
L
-10 
+10 
A 
Input Current, Port 0 in Bus Mode (Note 14) 
I
L
-300 
+300 
A 
RST Pulldown Resistance (Note 13) 
R
RST 
50 
120 
200 
k