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参数资料
| 型号： | R5109G421A-TR-FE |
| 厂商： | RICOH COMPANY LTD |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8 |
| 封装： | HALOGEN FREE AND ROHS COMPLIANT, SSOP-8 |
| 文件页数： | 1/18页 |
| 文件大小： | 275K |
| 代理商： | R5109G421A-TR-FE |
R5109G SERIES
Microprocessor Supervisory Circuit with 2 clock input pin
NO.EA-172-100127
1
OUTLINE
The R5109G 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 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%.
The function to stop supervising clock by the watchdog timer (INH function) and the function to supervise two
different clocks are built in this IC.
There are another 4 products by the difference of packages and the function of voltage detector and
watchdog timer. The package of R5109G is SSOP-8G.
FEATURES
Supply Current...................................................................... Typ. 11.5μA
Operating Voltage Range ..................................................... 0.9V to 6.0V
< Voltage Detector Part >
Detector Threshold Range.................................................... 1.5V to 5.5V (0.1V steps)
Detector Threshold Accuracy................................................ ±1.0%
Power-on Reset Delay Time accuracy ................................. ±16% (40°C ≤ Topt ≤ 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 ≤ Topt ≤ 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
With Inhibit pin (INH)............................................................. Able to stop watchdog timer
Dual clock input .................................................................... Able to supervise two microprocessors
Package................................................................................ SSOP-8G
) Accuracy to center value of (Min.+Max.)/2
APPLICATIONS
Supervisory circuit for equipment with using microprocessors.
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