LC87FBH08A_16 Datasheet, PDF (22/32 Pages) ON Semiconductor – 8-bit Microcontroller

LC87FBH08A
Reference voltage (VREF17) Characteristics at Ta = 40C to +85C, VSS1 = VSS2 = 0V
Parameter
Output voltage
Symbol
VOVREF
Pin/Remarks
Conditions
VDD[V]
2.0 to 5.5
min
1.67
Specification
typ
max
unit
1.75
1.83
V
Reference voltage operation
current (Note 7-1)
IDDVREF
2.0 to 5.5
110
A
Operation stabilization time
(Note 7-2)
tVRW
2.0 to 5.5
100 s
Note 7-1: IDDVREF denotes the currents that only flow to multivariable RC oscillator circuit’s reference voltage circuit.
Note 7-2: tVRW denotes the stabilization time from starting multivariable RC oscillator.
Power-on Reset (POR) Characteristics at Ta = 40C to +85C, VSS1 = VSS2 = 0V
Specification
Parameter
Symbol
Pin/Remarks
Conditions
Option selected
voltage
min
typ
max
unit
POR release
PORRL
 Select from option.
1.67V
1.55
1.66
1.77
voltage
(Note 8-1)
1.97V
1.85
1.96
2.07
2.07V
1.93
2.05
2.17
2.37V
2.23
2.35
2.47
2.57V
2.87V
2.43
2.55
2.67
V
2.71
2.85
2.99
3.86V
3.65
3.83
4.00
4.35V
4.12
4.32
4.50
Detection voltage
unknown state
POUKS
 See Fig. 7.
(Note 8-2)
0.7
0.95
Power supply rise
time
PORIS
 Power supply rise
time from 0V to 1.6V.
100
ms
Note8-1: The POR release level can be selected out of 8 levels only when the LVD reset function is disabled.
Note8-2: 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
Specification
Parameter
Symbol
Pin/Remarks
Conditions
Option selected
min
typ
max
unit
voltage
LVD reset voltage
LVDET
 Select from option.
1.91V
1.81
1.91
2.01
(Note 9-2)
(Note 9-1)
(Note 9-3)
 See Fig. 8.
2.01V
2.31V
2.51V
1.90
2.00
2.10
2.20
2.30
2.40
2.40
2.50
2.60
V
2.81V
2.68
2.80
2.92
3.79V
3.62
3.78
3.94
4.28V
4.09
4.27
4.45
LVD hysteresis width
LVHYS
1.91V
50
2.01V
50
2.31V
50
2.51V
50
mV
2.81V
50
3.79V
50
4.28V
50
Detection voltage
unknown state
LVUKS
 See Fig. 8.
(Note 9-4)
0.7
0.95
V
Low voltage detection TLVDW
 LVDET-0.5V
minimum width
 See Fig. 9.
0.2
ms
(Reply sensitivity)
Note9-1: The LVD reset level can be selected out of 7 levels only when the LVD reset function is enabled.
Note9-2: LVD reset voltage specification values do not include hysteresis voltage.
Note9-3: LVD reset voltage may exceed its specification values when port output state changes and/or when a large
current flows through port.
Note9-4: LVD is in an unknown state before transistors start operation.
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