EM78P257
OTP ROM
6. ELECTRICAL CHARACTERISTICS
6.1 DC Electrical Characteristic
(Ta=0~70°C, VDD=5.0V±5%, VSS=0V)
Symbol
Parameter
Condition
Min
DC
DC
DC
F±30%
F±35%
Typ
Max
4
8
20
F±30%
F±35%
Unit
MHz
MHz
MHz
KHz
XTAL (VDD to 2.3V)
XTAL (VDD to 3V)
XTAL (VDD to 5V)
ERC (VDD to 5V)
Two cycle with two clocks
Fxt
830
F
R: 5.1KW, C: 100 pF
4MHz, 1MHz, 455KHz,
32.768KHz
IRC (VDD to 5 V)
Hz
IC, ER (VDD to 5V)
4.3
MHz
R: 51KW
VIN = VDD, VSS
F±30%
2.0
F±30%
±1
IIL
VIH1
VIL1
Input Leakage Current for input pins
Input High Voltage (VDD=5V)
Input Low Voltage (VDD=5V)
mA
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
Ports 5, 6
Ports 5, 6
/RESET, TCC
/RESET, TCC
OSCI
OSCI
Ports 5, 6
Ports 5, 6
0.8
0.8
1.0
0.4
0.4
0.6
0.4
0.4
VIHT1 Input High Threshold Voltage (VDD=5V)
VILT1 Input Low Threshold Voltage (VDD=5V)
2.0
VIHX1
VILX1
VIH2
VIL2
Clock Input High Voltage ,(VDD=5V)
Clock Input Low Voltage(VDD=5V)
Input High Voltage (VDD=3V)
Input Low Voltage (VDD=3V)
2.5
1.5
VIHT2 Input High Threshold Voltage (VDD=3V)
VILT2 Input Low Threshold Voltage (VDD=3V)
/RESET, TCC
/RESET, TCC
OSCI
1.5
VIHX2
VILX2
VOH1
VOL1
Clock Input High Voltage (VDD=3V)
Clock Input Low Voltage (VDD=3V)
Output High Voltage (Ports 5, 6)
Output Low Voltage (Ports 5, 6)
1.5
OSCI
IOH = -9.0 mA
IOL = 9.0 mA
IOH = -20.0 mA
IOL = 20.0 mA
Pull-high active, input pin at VSS
Pull-down active, input pin at VDD
All input and I/O pins at VDD,
output pin floating, WDT disabled
All input and I/O pins at VDD,
output pin floating, WDT enabled
/RESET= 'High', Fosc=32KHz
(Crystal type, two clocks), output
pin floating, WDT disabled
/RESET= 'High', Fosc=32KHz
(Crystal type, two clocks), output
pin floating, WDT enabled
/RESET= 'High', Fosc=2MHz
(Crystal type, two clocks), output
pin floating
2.4
VOH2 Output High Voltage (P67 set to IR OUT)
VOL2 Output Low Voltage (P67 set to IR OUT)
2.4
IPH
IPD
Pull-high current
Pull-down current
Power down current
-50
25
-100 -240
50
mA
mA
120
ISB1
ISB2
1
mA
mA
Power down current
1
10
30
Operating supply current
(VDD=3V) at two clocks
ICC1
ICC2
ICC3
ICC4
15
mA
Operating supply current
(VDD=3V) at two clocks
19
35
mA
Operating supply current
(VDD=5.0V) at two clocks
2.0
mA
Operating supply current
(VDD=5.0V) at two clocks
/RESET= 'High', Fosc=4MHz
(Crystal type, two clocks), output
pin floating
4.0
mA
* These parameters are characterizes and tested.
This specification is subject to change without prior notice.
72
07.27.2004 (V1.4)
ELAN [ ELAN MICROELECTRONICS CORP ]
