Manual

W78C438C
Publication Release Date: July 1998
- 11 - Revision A1
DC CHARACTERISTICS
VDD−VSS = 5V ±10%, TA = 25° C, FOSC = 20 MHz, unless otherwise specified.
PARAMETER SYM. TEST CONDITIONS MIN. TYP. MAX. UNIT
Oper. Voltage VDD 4.5 5 5.5 V
Oper. Current IDD * No load - - 20 mA
Idle Current IIDLE Program idle mode - - 7 mA
Pwdn Current IPWDN Program power-down mode - - 50
µA
Input Leakage
Current
ILK1
INT2 , INT3
Internal pull-high Notes 1, 2
-300 - +10
µA
Input Leakage
Current
ILK2 RESET
Internal pull-low
Notes 1, 2
-10 - +300
µA
Input Leakage
Current
ILK3
EA , Port 0, DP4 Note 1
-10 - +10
µA
Input Leakage
Current
ILK4 P1, P2, P3, P8 Note 1 -50 - +10
µA
Output Low Voltage VOL1 IOL1 = 2 mA (Port 1, 2, 3, 8) - - 0.45 V
Output High Voltage VOH1
IOH1 = -100 µA (Port 1, 2, 3, 8)
2.4 - - V
Output Low Voltage VOL2 IOL2 = 4mA Note 3
(ALE, PSEN, P0, DP4)
- - 0.45 V
Output High Voltage VOH2
IOH2 = -400 µA Note 3
(ALE, PSEN, P0, DP4)
2.4 - - V
Output Low Voltage VOL3 IOL2 = 2 mA (AP5, AP6, AP7) - - 0.45 V
Output High Voltage VOH3
IOH2 = -100 µA (AP5, AP6, AP7)
2.4 - - V
Input Voltage VILT
VDD = 5V ±10%
0 - 0.8 V
Input Voltage VIHT
VDD = 5V ±10%
2.4 -
Note 4
V
Input Voltage VILC
VDD = 5V ±10%, XTAL1 Note 5
0 - 0.8 V
Input Voltage VIHC
VDD = 5V ±10%, XTAL1 Note 5
3.5 -
Note 4
V
Input Voltage VILR
VDD = 5V ±10%, RESET Note 5
0 - 0.8 V
Input Voltage VIHR
VDD = 5V ±10%, RESET Note 5
2.4 -
Note 4
V
Notes:
1. 0 < V
IN < VDD, 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.