Microprocessor Supervisory Circuit
R5107G SERIES
OUTLINE
NO. EA-170-080604
The R5107G Series are CMOS-based µ con supervisory circuit, or high accuracy and ultra low supply current
voltage detector with built-in delay and watchdog timer. When the VDD voltage is down across the threshold, or
the watchdog timer does not detect the system clock from the
µ
con, the reset output is generated. The voltage
detector circuit is used for the system reset, etc. The detector threshold is fixed internally, and the tolerance 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. When the VDD supply voltage becomes higher than the released voltage, the reset
state will be maintained during the delay time. The time out period of the watchdog timer can be also set with an
external capacitor. The output type of the reset is selectable, Nch open-drain, or CMOS. The function to stop
supervising clock by the watchdog timer (INH function) and manual reset function are built in this IC. The
package is small SSOP-8G.
FEATURES
•
Built-in a watchdog timer's time out period accuracy
±30%
•
Timeout period for watchdog and generating a reset signal can be set by an external capacitor
•
Detector Threshold Voltage ····························· 0.1V stepwise setting in the range from 1.5V to 5.5V
•
Supply current ·················································· Typ. 11µA
•
Operating Voltage ············································ 0.9V to 6.0V
•
High Accuracy Output Voltage of Detector Threshold ·············································
±1.0%
•
Power-on Reset Delay Time accuracy·············
±20%
•
Power-on reset delay time of the voltage detector can be set with an external capacitor.
•
Small Package ················································· SSOP-8G (0.65mm pitch)
APPLICATION
•
Supervisory circuit for equipment with using microprocessors.
1
R5107G(Preliminary)
SELECTION GUIDE
The selection can be made with designating the part number as shown below:
R5107Gxx1x-TR
↑↑
ab
↑ ↑
c
d
Code
a
b
c
d
Descriptions
Designation of Package Type;
G: SSOP8G (2.9mmx4.0mm)
Designation of Detector Threshold Voltage (-V
DET
)
0.1V stepwise setting is possible in the range from 1.5V to 5.5V
Designation of the output type of RESETB
A: Nch Open-drain
C: CMOS Output
Designation of Taping Type
←part
Number
PIN CONFIGURATION
RESETB 1
MR
CD
2
3
R5107GxxxA
R5107GxxxC
8
7
6
5
SSOP8G (0.65mm pitch)
VDD
TW
INH
SCK
GND 4
PIN DESCRIPTION
Pin No
1
2
3
4
5
6
7
8
Symbol
RESETB
MR
C
D
GND
SCK
INH
TW
V
DD
Pin Description
Output Pin for Reset signal of Watchdog timer and Voltage
Detector. (Output “L” at detecting Detector Threshold and
Watchdog Timer Reset.)
Manual Reset Pin (Active at "L")
External Capacitor Pin for Setting Delay Time of Voltage Detector
Ground Pin
Clock Input Pin from Microprocessor
Inhibit Pin ("L": Inhibit the watchdog timer)
External Capacitor Pin for Setting Reset and Watchdog Timeout
Periods
Power supply Pin
3
R5107G(Preliminary)
ABSOLUTE MAXIMUM RATINGS
Topt=25°C, V
SS
=0V
Symbol
V
IN
V
CD
V
TW
V
RESETB
V
SCK
V
INH
V
MR
I
RESETB
P
D
Topt
Tstg
Output Current
Power Dissipation
Input Voltage
Output Voltage
Supply Voltage
Item
Voltage of C
D
Pin
Voltage of TW Pin
Voltage of RESETB Pin
Voltage of SCK Pin
Voltage of INH Pin
Voltage of MR Pin
Current of RESETB Pin
Rating
-0.3∼7.0
-0.3∼V
IN
+0.3
-0.3∼V
IN
+0.3
-0.3∼7.0
-0.3∼7.0
-0.3∼7.0
-0.3∼7.0
20
300
-40∼+105
-55∼+125
Unit
V
V
V
V
V
V
V
mA
mW
°C
°C
Operating Temperature Range
Storage Temperature Range
ELECTRICAL CHARACTERISTICS
R5107GxxxA/C
Unless otherwise specified, V
IN
=6.0V, C
TW
=0.1uF, C
D
=0.1uF, Rpull-up=100kΩ(R5107GxxxA)
The number of Bold font applied to the temperature range from -40°C to 105°C
(Topt=25°C)
Symbol
V
IN
Iss
Item
Operating Voltage
Supply Current
Conditions
V
IN
=(-V
DET
)+0.5V
Clock Pulse Input
Voltage Detector
SENSE pin Threshold
-40°C≤Topt≤105°C
Min.
0.9
Typ.
Max.
6.0
Unit
V
µA
11
x0.990
x0.972
±100
15
x1.010
x1.015
-V
DET
∆-V
DET
/
∆Topt
V
HYS
tp
LH
I
DOUTN
I
DOUTP
V
MRH
V
MRL
MRW
RMR
T
WD
T
WR
Detector Threshold
Detector Threshold
Temperature Coefficient
Detector Threshold
Hysteresis
Output Delay Time
Output Current (RESETB
Output pin)
Output Current (RESETB
Output pin)
MR Input "H"
MR Input "L"
MR Input Pulse Width
MR Pull-up Resistance
V
ppm/
°C
V
ms
mA
mA
C
D
=0.1µF
Nch, V
DD
=1.2V, V
DS
=0.1V
Nch, V
DD
=6.0V,
V
DS
=0.5V(R5108GxxxC)
(-V
DET
)
(-V
DET
)
(-V
DET
)x
x0.03
0.07
x0.05
340
467
370
0.38
0.65
1.0
0.00
0.80
0.90
6.0
0.35
110
310
34
164
450
48
V
V
us
kΩ
ms
ms
(*Note1)
Watchdog Timer
2
60
Watchdog Timeout period
Reset Hold Time of WDT
C
TW
=0.1uF
C
TW
=0.1uF
230
29
4
RF/Wirelessly
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