w78e52b Winbond Electronics Corp America, w78e52b Datasheet - Page 13

• Manufacturer Part Number: w78e52b
• Description: 8-bit Mtp Microcontroller
• Manufacturer: Winbond Electronics Corp America

DC Characteristics, continued
Notes:
*1. Pins P1, P2 and P3 source a transition current when they are being externally driven from 1 to 0. The transition current reaches
*2. RST pin has an internal pull-down resistor.
*3. P0, ALE, PSEN are in the external access memory mode.
*4. XTAL1 is a CMOS input and RST is a Schmitt trigger input.
Input Leakage Current
P0, EA
Output Low Voltage
P1, P2, P3
Output Low Voltage
ALE, PSEN , P0
Output High Voltage
P1, P2, P3
Output High Voltage
ALE, PSEN , P0
Input Low Voltage
(Except RST)
Input Low Voltage
RST
Input Low Voltage
XTAL1
Input High Voltage
(Except RST)
Sink Current
P1, P2, P3, P4
Input High Voltage
RST
Input High Voltage
XTAL1
Sink Current
P0, ALE, PSEN
Source Current
P1, P2, P3, P4
Source Current
P0, ALE, PSEN
its maximum value when V
(*4)
(*4)
(*4)
(*4)
PARAMETER
(*3)
(*3)
(*3)
(*3)
IN
is approximately 2V.
SYMBOL
V
V
V
V
V
V
V
V
V
V
I
I
I
I
I
SR1
SR2
SK1
SK2
OH1
OH2
OL1
OL2
LK
IH1
IH2
IH3
IL1
IL2
IL3
V
0V < V
V
I
V
I
V
I
V
I
V
V
V
V
V
V
V
V
V
V
V
V
V
V = 2.4V
OL1
OL2
OH1
OH2
TEST CONDITIONS
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
S
DD
DD
DD
S
DD
S
DD
= 2.4V
= 0.45V
= 0.45V
- 13 -
= +2 mA
= +4 mA
= 5.5V
= 4.5V
= 4.5V
= 4.5V
= 4.5V
= 4.5V
= 4.5V
= 4.5V
= 4.5V
= 4.5V
= 4.5V
= 4.5V
= 4.5V
= 4.5V
= 4.5V
= -100 A
= -400 A
IN
< V
DD
Preliminary W78E52B
Publication Release Date: December 1998
0.67 V
0.67 V
MIN.
SPECIFICATION
-100
-10
2.4
2.4
2.4
-8
0
0
0
4
8
-
-
DD
DD
V
V
V
DD
DD
DD
MAX.
-250
0.45
0.45
+10
-14
0.8
0.8
0.8
12
16
-
-
+0.2
+0.2
+0.2
Revision A1
mA
UNIT
mA
mA
uA
V
V
V
V
V
V
V
V
V
V
A