w78l812a Winbond Electronics Corp America, w78l812a Datasheet - Page 20

• Manufacturer Part Number: w78l812a
• Description: 8-bit Mcu Series 80c51-based
• Manufacturer: Winbond Electronics Corp America

DC Characteristics, continued
Notes:
*1. RST pin has an internal pull-down.
*2. Pins of P1 and P3 can source a transition current when they are being externally driven from 1 to 0.
*3. RST is a Schmitt trigger input and XTAL1 is a CMOS input.
*4. P0, P2, ALE and
*5. P3.4 to P3.7 are in normal mode.
*6. P3 (P3.4 − P3.7) is used LED driver port by set SFR.
Output
Output Low Voltage
P1, P2, P3, P4
Output Low Voltage
P0, ALE,
Output Low Voltage
P3
Sink current
P1, P2, P3
Sink current
P0, ALE,
Sink current P3.4 to P3.7
in High-Drive mode
Output High Voltage
P1, P2, P3, P4
Output High Voltage
P0, ALE,
Source current
P1, P2, P3, P4<0:4>
Source current
P0, ALE,
[*6]
PARAMETER
PSEN
PSEN
PSEN
PSEN
[5]
, P4<0:4>
PSEN
[*4]
, P4.6
[*4]
, P4.6
are tested in the external access mode.
SYM.
V
V
V
V
V
I
I
I
I
I
SK1
SK2
SK3
SR1
SR2
OH1
OH2
OL1
OL2
OL3
MIN.
-120
-1.9
-20
-10
1.8
4.5
2.4
1.4
2.4
1.4
10
12
4
-
-
-
-
-
SPECIFICATION
- 20 -
MAX.
-250
0.45
0.25
0.45
0.25
0.22
-3.3
-40
-14
5.4
18
12
24
9
-
-
-
-
W78LE812/W78L812A
UNIT
mA
mA
mA
mA
mA
mA
mA
μA
μA
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
= 4.5V, V
= 2.4V, V
= 4.5V, I
= 2.4V, I
= 4.5V, I
= 2.4V, I
= 4.5V, I
= 2.4V, I
= 4.5V, I
= 4.5V, V
= 2.4V, V
= 4.5V, V
= 2.4V, V
= 4.5V, V
= 4.5V, V
= 2.4V, V
= 4.5V, V
= 2.4V, V
TEST CONDITIONS
OH
OH
OL
OL
OL
OL
OL
OH
OH
OL
OL
OL
OL
OL
OH
OH
OH
OH
= -400 μA
= -200 μA
= +2 mA
= +1 mA
= +4 mA
= +2 mA
= +2 mA
= -100 μA
= -20 μA
= 0.45V
= 0.4V
= 0.45V
= 0.4V
= 0.45V
= 2.4V
= 1.4V
= 2.4V
= 1.4V