MB3793-27A Datasheet, PDF (6/25 Pages) Fujitsu Component Limited. – Power Voltage Monitoring IC with Watchdog Timer

MB3793-27A
■ ELECTRICAL CHARACTERISTICS
1. DC Characteristics
(VCC = +3.3 V, Ta = +25°C)
Parameter
Symbol
Conditions
Value
Unit
Min
Typ
Max
Power supply current
ICC After exit from reset
—
31
55
µA
Detection voltage
Ta = +25 °C
2.63 2.70 2.77
VSL VCC falling
V
Ta = –40 °C to +85 °C (2.59)* 2.70 (2.81)*
Ta = +25 °C
2.69 2.76 2.87
VSH
VCC rising
V
Ta = –40 °C to +85 °C (2.65)* 2.76 (2.87)*
Detection voltage hysteresis
difference
VSHYS VSH – VSL
35
65
95 mV
VCIH CK rising
Clock-input threshold voltage
VCIL CK falling
(0.7)* 1.3
1.9
V
0.5
1.0 (1.5)* V
Clock-input hysteresis
VCHTS
—
(0.1)* 0.3 (0.6)* V
VIIH
—
2.2
—
—
Inhibition-input voltage
V
VIIL
—
—
0
0.8
Input current
(CK1, CK2, INH)
IIH
VCK = 5 V
IIL
VCK = 0 V
—
0
–1.0
0
1.0 µA
—
µA
Reset output voltage
VOH IRESET = –5 mA
VOL IRESET = +5 mA
2.8
3.10
—
V
—
0.12
0.4
V
Reset-output minimum
power voltage
VCCL IRESET = +50 µA
—
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
30
VCC input pulse width
tPI
CTP = 0.1 µF
(8)*²
VCC delay time
tPD
CTP = 0.1 µF
—
Watchdog timer monitor time
tWD
CTW = 0.01 µF,
CTP = 0.1 µF
8
Watchdog timer reset time
tWR CTP = 0.1 µF
2
Clock input pulse width
tCKW
—
500
Clock input pulse cycle
tCKT
—
20
Reset (RESET) output transition ^Rising
tr*¹ CL = 50 pF
—
time
Falling
tf*¹ 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 = +3.3 V, Ta = +25°C)
Value
Typ
Unit
Max
75
120 ms
—
—
µs
2
(10)*² µs
16
24
ms
5.5
9
ms
—
—
ns
—
—
µs
—
500
ns
—
500
ns
6