MB3793-45PF-G-BND-JN-6E1 Fujitsu Semiconductor America Inc, MB3793-45PF-G-BND-JN-6E1 Datasheet - Page 12

IC PWR VOLT MON WD TIMER 8SOP

MB3793-45PF-G-BND-JN-6E1

Manufacturer Part Number
MB3793-45PF-G-BND-JN-6E1
Description
IC PWR VOLT MON WD TIMER 8SOP
Manufacturer
Fujitsu Semiconductor America Inc
Type
Simple Reset/Power-On Resetr
Datasheet

Specifications of MB3793-45PF-G-BND-JN-6E1

Number Of Voltages Monitored
1
Output
CMOS Inverted
Reset
Active Low
Reset Timeout
80 ms Minimum
Voltage - Threshold
4.5V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
865-1030
MB3793-45PF-G-JN-6E1

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MB3793-45PF-G-BND-JN-6E1
Manufacturer:
Fujitsu Semiconductor America
Quantity:
135
12
MB3793-45
(4) When the voltage at the watchdog timer monitor time setting pin C
(5) If the CK2 pin inputs a clock pulse (positive edge trigger) when the C
(6) If no clock pulse is fed to the CK1 or CK2 pin within the watchdog timer monitor time t
(7) When a certain period of time t
(8) If V
(9) When V
(10) When the CTP pin voltage reaches or exceeds V
(11) Making the inhibit pin active (setting the INH pin to “H” from “L”) forces the watchdog timer to stop operation.
(12) Canceling the inhibit input (setting the INH pin to “L” from “H”) restarts the watchdog timer.
(13) The reset signal is output when the power supply is turned off to set V
The V
The power-on reset hold timer monitor time t
t
The value of A is about 1300 with V
time setting capacitor (C
V
The value of V
order or simultaneously, the C
The MB3793 repeats operations (4) and (5) as long as the CK1/CK2 pin inputs clock pulses with the system
logic circuit operating normally.
lem with the system logic circuit, the CTW pin is set to the “L” level threshold voltage V
MB3793 outputs a reset signal (setting the RESET pin to “L” level from “H” level).
The value of V
The watchdog timer monitor time t
t
The value of B is hardly affected by the supply voltage; it is about 1500 with V
recharging the C
The watchdog timer monitor reset time t
t
The value of D is about 100 with V
The MB3793 repeats operations (4) and (5) as long as the CK1/CK2 pin inputs clock pulses. If no clock
pulse is input, the MB3793 repeats operations (6) and (7).
MB3793 outputs a reset signal (setting the RESET pin to “L” level from “H” level).
The value of V
the watchdog timer. It repeats operations (4) and (5) as long as the CK1/CK2 pin inputs clock pulses.
This stops only the watchdog timer, leaving the MB3793 monitoring V
The watchdog timer remains inactive unless the inhibit input is canceled.
PR
WD
WR
H
, the C
(ms)
(ms)
(ms)
CC
is lowered to the fall-time detected voltage (V
th
value is about 3.6 V with V
CC
.
. =
.
. =
.
. =
TW
A
reaches or exceeds V
B
D x C
switches from the charge state to the discharge state.
C
H
L
SL
C
TP
is always about 0.24 V regardless of the detected voltage.
is always about 1.24 V regardless of the detected voltage.
TW
TP
TP
is 4.5 V
( F)
), the MB3793 cancels the reset signal and starts operating the watchdog timer.
( F)
( F)
TW
).
WR
TW
SH
has passed (until the CTP pin voltage reaches or exceeds Vth again after
switches from the discharge state to the charge state.
WD
CC
CC
CC
again, the MB3793 starts charging the C
= 5.0 V. The MB3793 also starts charging the watchdog timer monitor
= 5.0 V
= 5.0 V.
is set with the following equation:
WR
is set with the following equation:
PR
is set with the following equation:
th
, the MB3793 cancels the reset and restarts operating
SL
) or less, the CTP pin voltage decreases and the
TW
reaches the “H” level threshold voltage
TW
CC
is being discharged in the CK1-CK2
CC
(operations (8) to (10)).
to V
TP
SL
.
CC
or less.
= 5.0 V.
WD
L
due to some prob-
or less and the

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