MB3793-37A Datasheet, PDF (6/21 Pages) Fujitsu Component Limited. – Power Voltage Monitoring IC with Watchdog Timer

MB3793-37A
s ELECTRICAL CHARACTERISTICS
1. DC Characteristics
Parameter
Symbol
Conditions
Min.
Power supply current
ICC1 After exit from reset
—
Detection voltage
Ta = +25°C
3.60
VSL VCC falling
Ta = –40°C to +85°C (3.55)*
Ta = +25°C
3.69
VSH
VCC rising
Ta = –40°C to +85°C (3.64)*
Detection voltage hysteresis
difference
VSHYS VSH – VSL
40
VCIH CK rising
Clock-input threshold voltage
VCIL CK falling
(1.4)*
0.8
Clock-input hysteresis
VCHTS
—
(0.4)*
VIIH
—
3.5
Inhibition-input voltage
VIIL
—
—
Input current
(CK1, CK2, INH)
IIH
VCK = 5 V
IIL
VCK = 0 V
—
–1.0
VOH IRESET = –5 mA
4.5
Reset output voltage
VOL IRESET = +5 mA
—
Reset-output minimum
power voltage
VCCL IRESET = +50 µA
—
(VCC = +5 V, Ta = +25°C)
Value
Typ.
Unit
Max.
30
50
µA
3.70 3.80
V
3.70 (3.85)*
3.79 3.89
V
3.79 (3.94)*
85
130 mV
1.9
2.5
V
1.3 (1.8)* V
0.6 (0.8)* V
—
—
V
0
0.8
0
1.0 µA
0
—
µA
4.75
—
V
0.12
0.4
V
0.8
1.2
V
* : The values enclosed in parentheses ( ) are setting assurance values.
2. AC Characteristics
Parameter
Symbol Conditions
Min.
Power-on reset hold time
tPR
CTP = 0.1 µF
80
VCC input pulse width
tPI
CTP = 0.1 µF
(110)*²
VCC delay time
tPD
CTP = 0.1 µF
—
Watchdog timer reset time
tWD
CTW = 0.01 µF,
CTP = 0.1 µF
7.5
Watchdog timer reset time
tWR CTP = 0.1 µF
5
Clock input pulse width
tCKW
—
500
Clock input pulse cycle
tCKT
—
20
Reset (RESET) output transition ^Rising
tr*¹ CL = 50 pF
—
time*¹
Falling
tf*² CL = 50 pF
—
*1:The voltage range is 10% to 90% at testing the reset output transition time.
*2:The values enclosed in parentheses ( ) are setting assurance values.
(VCC = +5 V, Ta = +25°C)
Value
Typ.
Unit
Max.
130
180 ms
—
—
µs
20
(100)*² µs
15
22.5 ms
10
15
ms
—
—
ns
—
—
µs
—
500
ns
—
500
ns
6