Winbond W78C438C, Manual

Page: 11 / 16

W78C438C
Publication Release Date: July 1998
- 11 - Revision A1
DC CHARACTERISTICS
V
DD
− V
SS
= 5V
±
10%, T
A
= 25
°
C, F
OSC
= 20 MHz, unless otherwise specified.
PARAMETER SYM. TEST CONDITIONS MIN. TYP. MAX. UNIT
Oper. Voltage V
DD
4.5 5 5.5 V
Oper. Current I
DD
* No load - - 20 mA
Idle Current I
IDLE
Program idle mode - - 7 mA
Pwdn Current I
PWDN
Program power-down mode - - 50
µ
A
Input Leakage
Current I
LK1
INT2
,
INT3
Internal pull-high
Notes 1, 2
-300 - +10
µ
A
Input Leakage
Current I
LK2
RESET
Internal pull-low
Notes 1, 2
-10 - +300
µ
A
Input Leakage
Current I
LK3 EA , Port 0, DP4
Note 1
-10 - +10
µ
A
Input Leakage
Current I
LK4
P1, P2, P3, P8
Note 1
-50 - +10
µ
A
Output Low Voltage V
OL1
I
OL1
= 2 mA (Port 1, 2, 3, 8) - - 0.45 V
Output High Voltage V
OH1
I
OH1
= -100
µ
A (Port 1, 2, 3, 8)
2.4 - - V
Output Low Voltage V
OL2
I
OL2
= 4mA
Note 3
(ALE, PSEN, P0, DP4)
- - 0.45 V
Output High Voltage V
OH2
I
OH2
= -400
µ
A
Note 3
(ALE, PSEN, P0, DP4)
2.4 - - V
Output Low Voltage V
OL3
I
OL2
= 2 mA (AP5, AP6, AP7) - - 0.45 V
Output High Voltage V
OH3
I
OH2
= -100
µ
A (AP5, AP6, AP7)
2.4 - - V
Input Voltage V
ILT
V
DD
= 5V
±
10%
0 - 0.8 V
Input Voltage V
IHT
V
DD
= 5V
±
10%
2.4 - Note 4 V
Input Voltage V
ILC
V
DD
= 5V
±
10%, XTAL1
Note 5
0 - 0.8 V
Input Voltage V
IHC
V
DD
= 5V
±
10%, XTAL1
Note 5
3.5 - Note 4 V
Input Voltage V
ILR
V
DD
= 5V
±
10%, RESET
Note 5
0 - 0.8 V
Input Voltage V
IHR
V
DD
= 5V
±
10%, RESET
Note 5
2.4 -
Note 4
V
Notes:
1. 0 < V
IN
< V
DD
, for INT2 , INT3 , RESET, EA , Port 0, DP4, P1, P2, P3 and P8 inputs in leakage.
2. Using an internal pull low/high resistor (approx. 30K).
3. ALE, PSEN , P0 and DP4 in external program or data access mode.
4. The maximum input voltage is V
DD
+0.2V.
5. XTAL1 is a CMOS input and RESET is a Schmitt trigger input.