R3118x Series
0.6V detect VD with Delay Function (External Capacitor Type) and SENSE pin
The R3118x Series are CMOS-based voltage detector ICs with the built-in output delay circuit. Since R3118x has a SENSE pin for
monitoring voltage separately from the power pin, its reset signal does not become unstable under the condition that the power
supply is sufficient to operate the IC, and the "L" can be maintained. The detector threshold can be specified from 0.6V. The delay
time can be set with an external capacitor connected to C
D
pin. In addition to SOT-23-5 and SC-88A packages, a 1.2mm square
DFN(PLP)1212-6 package is also available.
∗)
R3118N Series are suitable for automotive applications too. Please refer to our "Car Electronics Products Catalog" or contact us.
FEATURES
•
Supply Current (I
SS
) ························ Typ. 0.4μA (V
SENSE
=6.0V, V
DD
=6.0V)
•
Operating Voltage Range (V
DD
) ······ 1.0V to 6.0V
•
Detector Threshold Range (-V
DET
) ·· 0.6V to 5.0V (Internally fixed)
•
Output Delay··································· Typ. 100ms delay set with a 0.022μF
external capacitor
•
Reset Signal ···································"L"
•
Detector Threshold Accuracy ·········± 1.5% (-V
SET
≥
1.6V)
•
Temp. coeff. of Detector Threshold ······Typ.
±
30ppm/°C
•
Two Output Types···························Nch. Open Drain and CMOS
•
Packages········································DFN(PLP)1212-6, SC-88A, SOT-23-5
(The above shows specification at Topt=25
°
C. Design assurance value at -40
°
C
≤
Topt
≤
85
°
C is also available. For details, please refer to the datasheet.)
BLOCK DIAGRAMS
R3118xxxxA
(Nch. open drain output)
SENSE
V
DD
D
OUT
R3118xxxxC
(CMOS output)
SENSE
V
DD
Delay
Circuit
Vref
GND
C
D
Delay
Circuit
Vref
D
OUT
GND
C
D
SELECTION GUIDES
Halogen Free
Package
DFN(PLP)1212-6
SC-88A
SOT-23-5
Q'ty per Reel
Part No.
5,000 pcs R3118K.xx.1
∗
-TR
3,000 pcs R3118Q.xx.2
∗
-TR-FE
3,000 pcs R3118N.xx.1
∗
-TR-FE
TIMING CHARTS
Supply Voltage
(V
DD
)
Minimum Operating V
DDL
Voltage
Released Voltage +V
DET
Detector Threshold -V
DET
Detector Threshold
Hysteresis
.xx.
: Specify the detector threshold within the range of
0.6 (.06.) to 5.0V (.50.) in 0.1V steps.
.
∗
.
: Select the output type from (.A.) Nch. open drain or (.C.) CMOS.
SENSE Pin Voltage
(V
SENSE
)
GND
Pull-up Voltage
Output Voltage
PACKAGES (Top View)
DFN(PLP)1212-6
6
5
4
(V
OUT
)
GND
SC-88A
5
4
SOT-23-5
5
4
t
reset
t
delay
R3118xxxxA
Supply Voltage
(V
DD
)
Minimum Operating V
DDL
Voltage
Released Voltage +V
DET
Detector Threshold -V
DET
Detector Threshold
Hysteresis
1
2
3
1
2
3
1
2
3
1
2
3
4
5
6
SENSE
GND
C
D
V
DD
NC
D
OUT
1
2
3
4
5
D
OUT
GND
V
DD
C
D
SENSE
1
2
3
4
5
D
OUT
V
DD
GND
C
D
SENSE
SENSE Pin Voltage
(V
SENSE
)
GND
Supply Voltage (V
DD
)
Output Voltage
(V
OUT
)
GND
t
reset
t
delay
R3118xxxxC
APPLICATIONS
•
Microcontroller and logic circuit reset
•
Wave shaping circuit
No.EK-242-121001
•
Battery checker
•
Battery back-up circuit
•
Window comparator
•
Power failure detector
CMOS Voltage Detector
1. The products and the product specifications described in this document are subject to change or
discontinuation of production without notice for reasons such as improvement. Therefore, before
deciding to use the products, please refer to Ricoh sales representatives for the latest
information thereon.
2. The materials in this document may not be copied or otherwise reproduced in whole or in part
without prior written consent of Ricoh.
3. Please be sure to take any necessary formalities under relevant laws or regulations before
exporting or otherwise taking out of your country the products or the technical information
described herein.
4. The technical information described in this document shows typical characteristics of and
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.
5. The products listed in this document are intended and designed for use as general electronic
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
could result in human injury or death (aircraft, spacevehicle, nuclear reactor control system,
traffic control system, automotive and transportation equipment, combustion equipment, safety
devices, life support system etc.) should first contact us.
6. We are making our continuous effort to improve the quality and reliability of our products, but
semiconductor products are likely to fail with certain probability. In order to prevent any injury to
persons or damages to property resulting from such failure, customers should be careful enough
to incorporate safety measures in their design, such as redundancy feature, firecontainment
feature and fail-safe feature. We do not assume any liability or responsibility for any loss or
damage arising from misuse or inappropriate use of the products.
7. Anti-radiation design is not implemented in the products described in this document.
8. Please contact Ricoh sales representatives should you have any questions or comments
concerning the products or the technical information.
Halogen Free
For the conservation of the global environment, Ricoh is advancing the decrease of the negative environmental impact material.
After Apr. 1, 2006, we will ship out the lead free products only. Thus, all products that will be shipped from now on comply with RoHS Directive.
Basically after Apr. 1, 2012, we will ship out the Power Management ICs of the Halogen Free products only. (Ricoh Halogen Free products are
also Antimony Free.)
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Electronic Devices Company
http://www.ricoh.com/LSI/
RICOH COMPANY, LTD.
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