LC87FBL08A Datasheet, PDF (19/28 Pages) Sanyo Semicon Device – 8K-byte FROM and 256-byte RAM integrated 8-bit 1-chip Microcontroller

LC87FBL08A
Power-on Reset (POR) Characteristics at Ta = -40°C to +85°C, VSS1 = VSS2 = 0V
Parameter
Symbol
Pin/Remarks
Conditions
Option selected
voltage
Specification
min
typ
max
unit
POR release
voltage
PORRL
• Select from option.
(Note 7-1)
2.57V
2.87V
2.45
2.57
2.69
2.75
2.87
2.99
3.86V
4.35V
3.73
3.86
3.99
4.21
4.35
4.49
V
Detection
POUKS
• See Fig. 7.
voltage
(Note 7-2)
0.7
0.95
unknown state
Power supply
rise time
PORIS
• Power supply rise
time from 0V to 1.6V.
100
ms
Note7-1: The POR release level can be selected out of 4 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 = -40°C to +85°C, VSS1 = VSS2 = 0V
Parameter
LVD reset voltage
(Note 8-2)
Symbol
LVDET
LVD hysteresys
width
LVHYS
Detection voltage
unknown state
LVUKS
Pin/Remarks
Conditions
• Select from option.
(Note 8-1)
(Note 8-3)
• See Fig. 8.
• See Fig. 8.
(Note 8-4)
Option selected
voltage
2.81V
3.79V
4.28V
2.81V
3.79V
4.28V
min
2.71
3.67
4.15
Specification
typ
max
unit
2.81
2.91
3.79
3.91
V
4.28
4.41
60
65
mV
65
0.7
0.95
V
Low voltage
TLVDW
• LVDET-0.5V
detection
minimum width
• See Fig. 9.
0.2
ms
(Reply sensitivity)
Note8-1: The LVD reset level can be selected out of 3 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.A1955-19/28