W78c58 – Rainbow Electronics W78C58 User Manual
Page 13
W78C58
Publication Release Date: December 1997
- 13 -
Revision A5
DC Characteristics, continued
PARAMETER
SYM.
SPECIFICATION
UNIT
TEST CONDITIONS
MIN.
MAX.
Input Low Voltage
P0, P1, P2, P3, P4,
EA
V
IL1
0
0.8
V
V
DD
= 4.5V
Input Low Voltage
RST
V
IL2
0
0.8
V
V
DD
= 4.5V
Input Low Voltage
XTAL1[*4]
V
IL3
0
0.8
V
V
DD
= 4.5V
Input High Voltage
P0, P1, P2, P3, P4,
EA
V
IH1
2.4
V
DD
+0.2
V
V
DD
= 5.5V
Input High Voltage
RST
V
IH2
3.5
V
DD
+0.2
V
V
DD
= 5.5V
Input High Voltage
XTAL1 [*4]
V
IH3
3.5
V
DD
+0.2
V
V
DD
= 5.5V
Output Low Voltage
P1, P2, P3, P4
V
OL1
-
0.45
V
V
DD
= 4.5V
I
OL
= +2 mA
Output Low Voltage
P0, ALE, PSEN [*3]
V
OL2
-
0.45
V
V
DD
= 4.5V
I
OL
= +4 mA
Sink Current
P1, P2, P3, P4
I
SK1
4
8
mA
V
DD
= 4.5V
Vs = 0.45V
Sink Current
P0, ALE, PSEN
I
SK2
10
14
mA
V
DD
= 4.5V
Vs = 0.45V
Output High Voltage
P1, P2, P3, P4
V
OH1
2.4
-
V
V
DD
= 4.5V
I
OH
= -100
µA
Output High Voltage
P0, ALE, PSEN [*3]
V
OH2
2.4
-
V
V
DD
= 4.5V
I
OH
= -400
µA
Source Current
P1, P2, P3, P4
I
SR1
-120
-180
µA
V
DD
= 4.5V
Vs = 2.4V
Source Current
P0, ALE, PSEN
I
SR2
-8
-14
mA
V
DD
= 4.5V
Vs = 2.4V
Notes:
*1. RST pin is a Schmitt trigger input. RST has internal pull-low resistors of about 30 K
Ω.
*3. P0, ALE and /PSEN are tested in the external access mode.
*4. XTAL1 is a CMOS input.
*5. Pins of P1, P2, P3, P4 can source a transition current when they are being externally driven from 1 to 0. The transition
current reaches its maximum value when V
IN
approximates to 2V.