R510xx SERIES
Microprocessor Supervisory Circuit
NO.EA-210-111103
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
BLOCK DIAGRAMS
R5105Nxx1A
V
DD
3
C
D
6
Vref2
R5105Nxx1C
V
DD
3
C
D
6
Vref2
Vref1
C
TW
2
WATCHDOG
TIMER
CLOCK
DETECTOR
5 GND
1 SCK
Vref1
C
TW
2
WATCHDOG
TIMER
CLOCK
DETECTOR
5 GND
1 SCK
RESETB 4
RESETB 4
R5106Nxx1A
V
DD
3
SW1
V
DD
3
SW1
R5106Nxx1C
Vref2
Vref1
Vref2
Vref1
C
T
6
5 GND
SW2
WATCHDOG
TIMER
CLOCK
DETECTOR
C
T
6
5 GND
SW2
WATCHDOG
TIMER
CLOCK
DETECTOR
1 SCK
1 SCK
RESETB 4
2 INH
RESETB 4
2 INH
∗SW1:
"L"=ON,
SW2: "H"=ON
R5107Gxx1A
MR
V
DD
R5107Gxx1C
MR
V
DD
C
D
Vref2
Vref1
C
D
GND
Vref2
Vref1
GND
C
TW
WATCHDOG
TIMER
CLOCK
DETECTOR
C
TW
WATCHDOG
TIMER
CLOCK
DETECTOR
SCK
SCK
RESETB
INH
RESETB
INH
2
R510xx
R5108Gxx1A
SENSE
V
DD
V
DD
R5108Gxx1C
SENSE
C
D
Vref2
Vref1
C
D
Vref2
Vref1
GND
C
TW
WATCHDOG
TIMER
CLOCK
DETECTOR
GND
C
TW
WATCHDOG
TIMER
CLOCK
DETECTOR
SCK
SCK
RESETB
INH
RESETB
INH
R5109Gxx1A
V
DD
R5109Gxx1C
V
DD
C
D
Vref2
Vref1
C
D
Vref2
Vref1
GND
C
TW
WATCHDOG
TIMER
CLOCK
DETECTOR
CLOCK
DETECTOR
GND
C
TW
WATCHDOG
TIMER
CLOCK
DETECTOR
CLOCK
DETECTOR
SCK1
SCK2
SCK1
SCK2
RESETB
INH
RESETB
INH
3
R510xx
SELECTION GUIDE
The detector threshold, and the output type for the ICs can be selected at the users’ request. The selection
can be made with designating the part number as shown below;
Product Name
R5105Nxx1∗-TR-FE
R5106Nxx1∗-TR-FE
R5107Gxx1∗-TR-FE
R5108Gxx1∗-TR-FE
R5109Gxx1∗-TR-FE
Package
SOT-23-6
SOT-23-6
SSOP-8G
SSOP-8G
SSOP-8G
Quantity per Reel
3,000 pcs
3,000 pcs
3,000 pcs
3,000 pcs
3,000 pcs
Pb Free
Yes
Yes
Yes
Yes
Yes
Halogen Free
Yes
Yes
Yes
Yes
Yes
xx : The detector threshold can be designated in the range from 1.5V(15) to 5.5V(55) in 0.1V steps.
∗
: Designation of Output Type
(A) Nch Open Drain
(C) CMOS
SERIES SELECTION
R5105N
Package
With INH pin (Inhibit)
2 clock input
With MR pin (Manual Reset)
With SENSE pin
Remarks
No
No
C
D
pin and
C
TW
pin are
combined uses.
No
No
Yes
Yes
No
No
Operating
Supply Current
Voltage Range
11.5μA
1.5V to 6.0V
R5106N
R5107G
Yes
Yes
R5108G
SSOP-8G
R5109G
SOT-23-6
4
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
