R5107G321C-TR-FE [RICOH]
Power Supply Management Circuit, Fixed, 1 Channel, CMOS, PDSO8, SSOP-8;
| 型号： | R5107G321C-TR-FE |
| 厂家： | 
RICOH ELECTRONICS DEVICES DIVISION |
| 描述： | Power Supply Management Circuit, Fixed, 1 Channel, CMOS, PDSO8, SSOP-8 光电二极管 |
| 文件： | 总2页 (文件大小：258K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
R5107G Series
Watchdog Timer Equipped with Manual Reset with VD
The R5107G Series are CMOS-based system power ICs with a voltage detector (VD) and watchdog timer (WDT) integrated in a single chip.
R5107G monitors the power system of devices equipped with microprocessors and prevents system runaway with a reset signal when a
malfunction occurs. The output delay time of the VD and watchdog timeout period/reset time can be adjusted by an external capacitor with
a high degree of accuracy. The R5107G is equipped with the function that inhibits clock monitoring of the WDT (INH) and manual reset (MR)
that also stops the VD.
FEATURES
• Supply Current (ISS) ························Typ. 11μA (VDD=-VDET+0.5V,
Clock pulse input)
• Operating Voltage Range (VDD) ······0.9V to 6.0V
(VD Section)
• Output Delay Time (tPLH)·················Typ. 370ms (CD=0.1μF)
• Output Delay Time Accuracy··········± 16% (-40°C ≤ Topt ≤ 105°C)
(WDT Section)
• Watchdog Timeout Period(tWD)·······Typ. 310ms (CTW=0.1μF)
• Reset Hold Time of WDT(tWR)·········Typ. 34ms (CTW=0.1μF)
•
•
•
Detector Threshold Range (-VDET)···1.5V to 5.5V (internally fixed)
Detector Threshold Accuracy ··········± 1%
Temp. coeff. of Detector Threshold ···Typ. ± 100ppm/°C
• Watchdog Timeout Period Accuracy ····± 33% (-40°C ≤ Topt ≤ 105°C)
• Package··········································SSOP-8G
°
°
°
(The above shows specification at Topt=25 C. Design assurance value at -40 C ≤ Topt ≤ 105 C is also available. For details, please refer to the datasheet.)
BLOCK DIAGRAMS
TYPICAL APPLICATION
R5107Gxx1A
(Nch. open drain output)
MR
R5107Gxx1C
(CMOS output)
MR
Power Supply
Microprocessor
VDD
VDD
VDD
R
8
6
2
3
RESETB
R5107Gxx1A
1
5
VDD
INH
MR
CD
RESET
I/O
C
D
CD
Vref2
Vref1
Vref2
Vref1
Series
SCK
GND
SCK
GND
SCK
CTW
CTW
WATCHDOG
TIMER
CLOCK
DETECTOR
WATCHDOG
TIMER
CLOCK
DETECTOR
SW SW
CTW
7
GND
4
CTW
CD
RESETB
INH
INH
RESETB
SELECTION GUIDE
TIMING CHART
Halogen Free
Package
Q'ty per Reel
Part No.
+VDET
VDD
-VDET
SSOP-8G
3,000 pcs R5107G
.
xx.
1.
∗-TR-FE
.
xx : Specify the detector threshold within the range of
1.5V (
.
15
.
)
to 5.5V
(.
55
.
) in 0.1V steps.
VINH
: Select the output type from (
.
A
.
) Nch. open drain or (
.
C
.
) CMOS.
.
∗
PACKAGE (Top View)
VMR
SSOP-8G
8
7 6 5
tPHL
tPHL
tPLH
tPLH
+VTCD
VCD
-VTCD
tWDI
tWD
tWD
Vref2H
VCTW
1
2
3
4
1
2
RESETB Output pin for Reset "L" signal
Vref2L
MR
Manual reset pin
tWR
tWR
Ext. Cap. pin for setting output
delay time of VD
3
CD
VSCK
4
5
6
GND
SCK
INH
Ground pin
Watchdog timer clock input pin
Inhibit pin
Ext. Cap. pin for setting reset and
watchdog timeout period of WDT
Power supply pin
tMR
tPLH
VRESETB
7
8
CTW
VDD
∗VTCD
: Threshold voltage of CD pin when a power-on reset pulse inverting.
∗Vref2H : CTW pin voltage at the end of WDT timeout period.
∗Vref2L : CTW pin voltage at the begin of WDT timeout period.
∗tPHL : Output delay time
APPLICATION
• Monitoring of the power system of devices equipped with microprocessors
∗tWDI : tWD/10 (SCK pulses input during this period are ignored.)
No.EK-170-111001
CMOS Microprocessor Supervisory
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example application circuits for the products. The release of such information is not to be
construed as a warranty of or a grant of license under Ricoh's or any third party's intellectual
property rights or any other rights.
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components in standard applications (office equipment, telecommunication equipment,
measuring instruments, consumer electronic products, amusement equipment etc.). Those
customers intending to use a product in an application requiring extreme quality and reliability,
for example, in a highly specific application where the failure or misoperation of the product
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devices, life support system etc.) should first contact us.
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concerning the products or the technical information.
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■
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