R3112x Series
Voltage Detector with Delay Function (External Capacitor Type)
The R3112x Series are CMOS-based voltage detector ICs with the built-in output delay circuit. The delay time can be set with an
external capacitor.
FEATURES
•
Supply Current (I
SS
) ························ Typ. 0.5μA (V
DD
=-V
SET
+1.0V, R3112x15x)
•
Operating Voltage Range (V
DD
) ······ 0.7V to 6.0V
•
Detector Threshold Range (-V
DET
)····· 0.9V to 5.0V (Internally fixed)
•
Output Delay ································· Typ. 100ms delay set with a 0.022μF external
•
Reset Signal ··································· "L"
capacitor
•
Detector Threshold Accuracy ·······
±
2%
•
Temp. coeff. of Detector Threshold ··· Typ.
±
100ppm/°C
•
Two Output Types ·························· Nch. Open Drain and CMOS
•
Packages········································ SON1612-6, SC-82AB,
SC-88A, SOT-23-5
BLOCK DIAGRAMS
R3112xxxxA
(Nch. open drain output)
R3112xxxxC
(CMOS output)
V
DD
R
D
OUT
V
DD
R
D
OUT
Vref
GND
Vref
GND
C
D
C
D
SELECTION GUIDES
Halogen Free
Package
SON1612-6
SC-82AB
SC-88A
SOT-23-5
Q'ty per Reel
4,000 pcs
3,000 pcs
3,000 pcs
3,000 pcs
Part No.
R3112D.xx.1.
∗
-TR-FE
R3112Q.xx.1.
∗
-TR-FE
R3112Q.xx.2.
∗
-TR-FE
R3112N.xx.1.
∗
-TR-FE
TIMING CHARTS
Release Voltage
+V
DET
Supply
Voltage Detector Threshold
-V
DET
(V
DD
)
Minimum Operating
V
DDL
Voltage
GND
Pull-up Voltage
Output
Voltage
(V
OUT
)
Hysteresis
.xx.
: Specify the detector threshold within the range of
0.9V (.09.) to 5.0V (.50.) in 0.1V steps.
.∗
: Select the output type from (.A.) Nch. open drain or (.C.) CMOS.
HOW TO DETERMINE DELAY TIME
Let the capacity of an external capacitor "C
D
" (F),
the delay time (t
D
) is found from the following equation:
t
D
(s)=0.69
×
6.5
×
10
×
C
D
6
GND
t
PHL
R3112xxxxA
Release Voltage
+V
DET
Supply
Voltage Detector Threshold
-V
DET
(V
DD
)
Minimum Operating
V
DDL
Voltage
GND
Pull-up Voltage
Output
Voltage
(V
OUT
)
t
D
PACKAGES (Top View)
SON1612-6
6
5
4
Hysteresis
SC-82AB
4
3
SC-88A
5
4
SOT-23-5
5
4
1
2
3
1
2
3
1
2
1
2
3
1
2
3
4
5
6
OUT
GND
C
D
NC
GND
V
DD
1
2
3
4
V
DD
GND
C
D
OUT
1
2
3
4
5
V
DD
NC
GND
C
D
OUT
1
2
3
4
5
OUT
V
DD
GND
NC
C
D
GND
t
PHL
R3112xxxxC
t
D
APPLICATIONS
•
Microcontroller and logic circuit reset
•
Wave shaping circuit
No.EK-087-121001
•
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.)
RICOH COMPANY, LTD.
Electronic Devices Company
http://www.ricoh.com/LSI/
RICOH COMPANY, LTD.
Electronic Devices Company
● Higashi-Shinagawa Office (International Sales)
3-32-3, Higashi-Shinagawa, Shinagawa-ku, Tokyo 140-8655, Japan
Phone: +81-3-5479-2857 Fax: +81-3-5479-0502
RICOH EUROPE (NETHERLANDS) B.V.
“Nieuw Kronenburg”
Prof. W.H. Keesomlaan 1, 1183 DJ, Amstelveen, The Netherlands
P.O.Box 114, 1180 AC Amstelveen
Phone: +31-20-5474-309 Fax: +31-20-5474-791
● Semiconductor Support Centre
RICOH ELECTRONIC DEVICES KOREA Co., Ltd.
11 floor, Haesung 1 building, 942, Daechidong, Gangnamgu, Seoul, Korea
Phone: +82-2-2135-5700 Fax: +82-2-2135-5705
RICOH ELECTRONIC DEVICES SHANGHAI Co., Ltd.
Room403, No.2 Building, 690#Bi Bo Road, Pu Dong New district, Shanghai 201203,
People's Republic of China
Phone: +86-21-5027-3200 Fax: +86-21-5027-3299
RICOH COMPANY, LTD.
Electronic Devices Company
● Taipei office
Room109, 10F-1, No.51, Hengyang Rd., Taipei City, Taiwan (R.O.C.)
Phone: +886-2-2313-1621/1622 Fax: +886-2-2313-1623
Automotive Electronics
京公网安备 11010802033920号
EEWORLD
