LC87F2C64A Datasheet, PDF (20/28 Pages) Sanyo Semicon Device – 8-bit 1-chip Microcontroller

LC87F2C64A
Power-on Reset (POR) Characteristics at Ta=-30 to +70°C, VSS1=VSS2=VSS3=0V
Parameter
POR release
voltage
Symbol
PORRL
Pin/Remarks
Conditions
• Select from option.
(Note 7-1)
Specification
Option selected voltage
min
typ
max unit
1.67V
1.67
1.97V
1.97
2.07V
2.07
2.37V
2.57V
2.87V
2.37
2.57
V
2.87
3.86V
3.86
4.35V
4.35
Detection voltage
unknown state
POUKS
• See Fig. 8.
(Note 7-2)
0.7 0.95
Power supply rise
time
PORIS
• Power supply rise time
from 0V to x V.
100 ms
Note7-1: The POR release level can be selected out of 7 levels only when the LVD reset function is disabled.
Note7-2: POR is in an unknown state before transistors start operation.
Low Voltage Detection Reset (LVD) Characteristics at Ta=-30 to +70°C, VSS1=VSS2=VSS3=0V
Parameter
LVD reset
Voltage
(Note 8-2)
Symbol Pin/Remarks
Conditions
Option selected voltage
min
LVDET
• Select from option.
(Note 8-1)
(Note 8-3)
• See Fig. 9.
1.91V
2.01V
2.31V
2.51V
Specification
typ
max unit
1.91
2.01
2.31
2.51
V
2.81V
2.81
LVD hysteresis width LVHYS
3.79V
3.79
4.28V
4.28
1.91V
55
2.01V
55
2.31V
2.51V
55
55
mV
2.81V
60
3.79V
65
4.28V
65
Detection voltage
unknown state
LVUKS
• See Fig. 9.
(Note 8-4)
0.7 0.95 V
Low voltage detection TLVDW
• LVDET-0.5V
minimum width
• See Fig. 10.
0.2
ms
(Reply sensitivity)
Note8-1: The LVD reset level can be selected out of 7 levels only when the LVD reset function is enabled.
Note8-2: LVD reset voltage specification values do not include hysteresis voltage.
Note8-3: LVD reset voltage may exceed its specification values when port output state changes and/or when a large
current flows through port.
Note8-4: LVD is in an unknown state before transistors start operation.
No.A1935-20/28