R510xx SERIES
Microprocessor Supervisory Circuit
NO.EA-210-100217
OUTLINE
The R510xx Series are CMOS-based microprocessor supervisory circuit, or high accuracy and ultra low
supply current voltage detector with built-in delay circuit and watchdog timer. When the supply voltage is down
across the threshold, or the watchdog timer does not detect the system clock from the microprocessor, the reset
output is generated.
The voltage detector circuit is used for the system reset, etc. The detector threshold is fixed internally, and the
accuracy is
±1.0%.
The released delay time (Power-on Reset Delay) circuit is built-in, and output delay time is
∗
adjustable with an external capacitor, and the accuracy is
±16%
. When the supply voltage becomes higher
than the released voltage, the reset state will be maintained during the delay time. The output type of the reset
is selectable, Nch open-drain, or CMOS.
The time out period of the watchdog timer can be also set with an external capacitor, and the accuracy is
∗
±33%
.
There are 5 products by the difference of packages and the function of voltage detector and watchdog timer.
The packages of R5105N and R5106N are SOT-23-6. The packages of R5107G, R5108G and R5109G are
SSOP-8G.
FEATURES
•
Supply Current...................................................................... Typ. 11μA (R5109G: 11.5μA)
•
Operating Voltage Range ..................................................... 0.9V to 6.0V (R5108G: 1.5V to 6.0V)
< Voltage Detector Part >
•
Detector Threshold Range.................................................... Stepwise setting with a step of 0.1V in the
range of 1.5V to 5.5V
•
Detector Threshold Accuracy................................................
±1.0%
∗
•
Power-on Reset Delay Time accuracy .................................
±16%
(−40°C
≤
T
opt
≤
105°C)
•
Power-on reset delay time of the voltage detector ............... Typ. 370ms with an external capacitor : 0.1μF
< Watchdog Timer Part >
∗
•
Built-in a watchdog timer's time out period accuracy ...........
±33%
(−40°C
≤
T
opt
≤
105°C)
•
Timeout period for watchdog timer ....................................... Typ. 310ms with an external capacitor : 0.1μF
•
Reset timer for watchdog timer............................................. Typ. 34ms with an external capacitor : 0.1μF
•
Packages .............................................................................. SOT-23-6 (R5105N, R5106N)
SSOP-8G (R5107G, R5108G, R5109G)
∗)
Accuracy to center value of (Min.+Max.)/2
APPLICATIONS
•
Supervisory circuit for equipment with using microprocessors.
1
R510xx
PIN CONFIGURATIONS
•
SOT-23-6
6
5
4
•
SSOP-8G
8 7 6 5
(mark side)
1
2
3
1 2 3 4
PIN DESCRIPTIONS
•
R5105N (SOT-23-6)
Pin No.
1
2
3
4
5
6
Symbol
SCK
C
TW
V
DD
RESETB
GND
C
D
Description
Clock Input Pin from Microprocessor
External Capacitor Pin for setting Reset and Watchdog Timer
Timeout Period
Power supply Pin
Output Pin for Reset signal of Watchdog timer and Voltage Detector.
(Output "L" at detecting Detector Threshold and Watchdog Timer
Reset.)
Ground Pin
External Capacitor Pin for Setting delay time of Voltage Detector
•
R5106N (SOT-23-6)
Pin No.
1
2
3
4
5
6
Symbol
SCK
INH
V
DD
RESETB
GND
C
T
Description
Clock Input Pin from Microprocessor
Inhibit Pin ("L": Inhibit the watchdog timer)
Power supply Pin
Output Pin for Reset signal of Watchdog timer and Voltage Detector.
(Output "L" at detecting Detector Threshold and Watchdog Timer
Reset.)
Ground Pin
External Capacitor Pin for Setting Reset and Watchdog Timeout
Periods and delay time of Voltage Detector
5
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