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Número de pieza | R3112N271C | |
Descripción | (R3112xxxx) LOW VOLTAGE DETECTOR | |
Fabricantes | RICOH electronics devices | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de R3112N271C (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
No Preview Available ! R3112x SERIES
LOW VOLTAGE DETECTOR WITH OUTPUT DELAY
NO. EA-087-070112
OUTLINE
The R3112x Series are CMOS-based voltage detector ICs with high detector threshold accuracy and ultra-low
supply current, which can be operated at an extremely low voltage and is used for system reset as an example.
www.DataSheet4UE.caomch of these ICs consists of a voltage reference unit, a comparator, resistor net for detector threshold setting,
an output driver, a hysteresis circuit, and an output delay circuit. The detector threshold is fixed with high
accuracy internally and does not require any adjustment. Two output types, Nch open drain type and CMOS type
are available.
Three types of packages, SOT-23-5, small SC-82AB, and ultra-small SON1612-6 can be selected so that high
density mounting on boards is possible.
FEATURES
• Built-in Output Delay Circuit............................................... Typ. 100ms with an external capacitor: 0.022µF
• Supply Current ................................................................... Typ. 0.5µA (R3112x271A/C, VDD=2.6V)
• Operating Voltage .............................................................. 0.7 to 6.0V(Topt=25°C)
• Detector Threshold............................................................. 0.9V to 5.0V
• High Accuracy Detector Threshold .................................... ±2.0%
• Low Temperature-Drift Coefficient of Detector Threshold ...Typ. ±100ppm/°C
• Two Output Types .............................................................. Nch Open Drain and CMOS
• Packages ........................................................................... SOT-23-5(Mini-mold),SC-82AB, SON1612-6
APPLICATIONS
• CPU and Logic Circuit Reset
• Battery Checker
• Window Comparator
• Wave Shaping Circuit
• Battery Back-up Circuit
• Power Failure Detector
1
1 page R3112x
ELECTRICAL CHARACTERISTICS
• R3112x091A/C
Symbol
−VDET
VHYS
Item
Detector Threshold
Detector Threshold Hysteresis
ISS Supply Current
www.DataSheet4U.cVoDmDH
VDDL
Maximum Operating Voltage
Minimum Operating Voltage∗Note1
IOUT Output Current (Driver Output Pin)
VTCD
ICD
CD pin Threshold Voltage
CD pin Output Current
RD
∆−VDET/
∆Topt
Output Delay Resistance
Detector Threshold
Temperature Coefficient
Conditions
VDD=0.80V
VDD=1.90V
Topt=25°C
−40°C <= Topt <= 85°C
Nch
VDS=0.05V, VDD=0.70V
VDS=0.50V, VDD=0.85V
Pch
VDS=−2.1V, VDD=4.5V
VDD=0.99V
VDS=0.10V, VDD=0.70V
VDS=0.50V, VDD=0.85V
−40°C <= Topt <= 85°C
Min.
0.882
0.027
10
0.05
Typ.
0.900
0.045
0.6
0.5
120
0.90
Topt=25°C
Max.
0.918
0.063
2.0
2.0
6.0
0.70
0.80
Unit
V
V
µA
V
V
µA
mA
1.0 3.5
0.297
2
10
3.25
0.495
70
400
6.50
0.693
13.00
±100
mA
V
µA
MΩ
ppm/
°C
5
5 Page • Operation of Output Delay
Supply Voltage
Released Voltage (+VDET)
R3112x
www.DataSheet4U.com
Capacitor Voltage
CD Pin Threshold Voltage (VTCD)
GND
Output Voltage
GND
Output Delay Time(tD)
When the supply voltage which is higher than released voltage is forced to VDD pin, charge to an external
capacitor starts, then capacitor voltage increases. Until the capacitor voltage reaches to CD Pin threshold voltage,
output voltage maintains “L”. When the capacitor voltage becomes higher than CD pin threshold voltage, output
voltage is reversed from "L” to "H". Where, the time interval between the rising edge of supply voltage and output
voltage reverse point means output delay time.
• Output Delay Time
Output Delay Time (tD) can be calculated with the next formula.
tD=0.69×RD×CD(s)
RD is internal resistor and set at 6.5MΩ(Typ.) typically. CD(F) describes the capacitance value of an external
capacitor. Therefore,
tD=0.69×6.5×106×CD(s)
11
11 Page |
Páginas | Total 30 Páginas | |
PDF Descargar | [ Datasheet R3112N271C.PDF ] |
Número de pieza | Descripción | Fabricantes |
R3112N271A | LOW VOLTAGE DETECTOR WITH OUTPUT DELAY | RICOH electronics devices division |
R3112N271A | (R3112xxxx) LOW VOLTAGE DETECTOR | RICOH electronics devices |
R3112N271A-TR | LOW VOLTAGE DETECTOR WITH OUTPUT DELAY | RICOH electronics devices division |
R3112N271C | LOW VOLTAGE DETECTOR WITH OUTPUT DELAY | RICOH electronics devices division |
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