R3117xxx1/2 SERIES
LOW VOLTAGE DETECTOR with SENSE pin
NO.EA-186-200807
Notice
If the SENSE pin voltage of R3117xxx1A/C and R3117Qxx2A/C make the gradual curve by raising 0.5V/ms
or less, it may cause noise when the output voltage is switched from low to high. Please use R3117xxx3A/C
and R3117Qxx4A/C Series for new designs instead of these products to avoid the above problem.
OUTLINE
The R3117x 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.
Each of these ICs consists of a voltage reference unit, a comparator, resistors for detector threshold setting,
an output driver and a hysteresis circuit. The detector threshold is fixed with high accuracy internally and does
not require any adjustment.
The tolerance of the detector threshold is ±15mV (-VDET <
= 1.5V) or ±1.0% (1.5V< -VDET). Since the sense pin
is separated from the VDD pin of the IC, therefore, even if the sense pin voltage becomes to 0V, the output voltage
keeps its "L" level.
Two output types, Nch open drain type and CMOS type are available.
Three types of packages, SOT-23-5, SC-88A, and DFN(PL)1010-4 are available.
FEATURES∗
• Supply Current ...................................................................... Typ. 0.29µA (VDD=6.0V)
Consumption current through SENSE pin is not included.
• Operating Voltage Range...................................................... 1.0V to 6.0V (-40°C <
= Topt <
= 105°C)
• Detector Threshold Range .................................................... 0.7V to 5.0V (0.1V steps)
(For other voltages, please refer to MARK INFORMATIONS.)
• Accuracy Detector Threshold ................................................ ±1.0% (-VDET >
= 1.6V), ±15mV (-VDET>Ra. Refer to the electrical characteristics table to see the
RSENSE value.
VDD
Vs
VDD
Ra
-VDET
Rb
Vs
SENSE
Ra
Ia
R3117x
Series
SENSE
R3117x
Series
-VDET
DOUT
Rb
ISENSE
Ib
GND
RSENSE
GND
Fig.2
Fig.3
Accuracy Detector Threshold
If the VDD bias voltage is lager than 5.25V, and to keep the detector threshold accuracy level, or if the maximum
operating voltage line must be used as the VDD bias voltage, the input voltage must be set low by using the divider
resistors which are shown in Fig.4.
VB
R1
Vs
VDD
Ra
SENSE
-VDET
Rb
R2
R3117x
Series
GND
Fig.4
12
DOUT
R3117xxx1/2
NO.EA-186-200807
Detector Operation vs. glitch input voltage to the SENSE pin
When the R3117x is at released, if the pulse voltage which the detector threshold or lower voltage, the graph
below means that the relation between pulse width and the amplitude of the swing to keep the released state for
the R3117x.
Pulse Width
Sense Voltage (VSENSE)
Detector Threshold (-VDET)
Over Drive
VSENSE Input Waveform
This graph shows the maximum pulse conditions to keep the released voltage. If the pulse with larger amplitude
or wider width than the graph above, is input to SENSE pin, the reset signal may be output.
13
R3117xxx1/2
NO.EA-186-200807
TEST CIRCUITS
ISS
VIN
SENSE
5V or VDD
VDD
VDD
470kΩ
R3117x
Series
VIN
SENSE
R3117x
Series
VOUT
DOUT
GND
GND
Supply Current Test Circuit
Detector Threshold Test Circuit
(Pull-up circuit is not necessary for
CMOS Output type.)
VDD
VDS
VDD
IOUT
VIN
SENSE
R3117x
Series
IOUT
VIN
DOUT
GND
Nch Driver Output Current Test Circuit
SENSE
VDS
R3117x
Series
DOUT
GND
Pch Driver Output Current Test Circuit
∗Apply to CMOS Output type only
14
VDD−VDS
R3117xxx1/2
NO.EA-186-200807
TYPICAL CHARACTERISTICS
1) Supply Current vs. Supply Voltage
R3117xxxxA/C (at released)
R3117xxxxA/C (at detect)
2) Detector Threshold vs. Temperature
R3117x07xA/C
R3117x30xA/C
R3117x50xA/C
15
R3117xxx1/2
NO.EA-186-200807
3) Detector Threshold vs. Supply Voltage
R3117x07xA/C
R3117x30xA/C
R3117x50xA/C
4) Hysteresis vs. Supply Voltage
R3117x07xA/C
16
R3117x30xA/C
R3117xxx1/2
NO.EA-186-200807
R3117x50xA/C
5) Output Voltage vs. SENSE pin Input Voltage (Nch Open Drain Output type is pulled up to VDD.)
R3117x07xA/C
R3117x30xA/C
R3117x50xA/C
17
R3117xxx1/2
NO.EA-186-200807
6) Nch Driver Output Current vs. Supply Voltage
R3117xxxxA/C
8) Pch Driver Output Current vs. Supply Voltage
R3117xxxxC
18
7) Nch Driver Output Current vs. VDS
R3117xxxxA/C
9) Pch Driver Output Current vs. VDS
R3117xxxxC
R3117xxx1/2
NO.EA-186-200807
TYPICAL APPLICATION
•
R3117xxxxA CPU Reset Circuit (Nch Open Drain Output)
(1) Input Voltage to R3117xxxxA is equal to Input Voltage to CPU
VDD
470kΩ R
VDD
VDD
Vs
CPU
R3117xxxxA
Series
DOUT
SENSE
RESET
GND
GND
(2) Input Voltage to R3117xxxxA is unequal to Input Voltage to CPU
VDD1
VDD2
470kΩ R
VDD
Vs
R3117xxxxA
Series
DOUT
SENSE
GND
•
VDD
CPU
RESET
GND
R3117xxxxC CPU Reset Circuit (CMOS Output)
VDD
VDD
Vs
R3117xxxxC
Series
DOUT
SENSE
GND
VDD
CPU
RESET
GND
19
R3117xxx1/2
NO.EA-186-200807
TECHNICAL NOTES
When connecting resistors to the device’s input pin
When connecting a resistor (R1) to an input of this device, the input voltage decreases by [Device’s
Consumption Current] x [Resistance Value] only. And, the cross conduction current*1, which occurs when
changing from the detecting state to the release state, is decreased the input voltage by [Cross Conduction
Current] x [Resistance Value] only. And then, this device will enter the re-detecting state if the input voltage
reduction is larger than the difference between the detector voltage and the released voltage.
When the input resistance value is large and the VDD is gone up at mildly in the vicinity of the released voltage,
repeating the above operation may result in the occurrence of output.
As shown in Figure A/B, set R1 to become 100 kΩ or less as a guide, and connect C IN of 0.1 μF and more to
between the input pin and GND. Besides, make evaluations including temperature properties under the actual
usage condition, with using the evaluation board like this way. As a result, make sure that the cross conduction
current has no problem.
R1
R1
VDD
CIN
*2
Voltage
VDD
R2
*2
CIN
OUT pin
Detector
GND
Figure A
*1 In the CMOS output type, a charging current for OUT pin is included.
*2 Note the bias dependence of capacitors.
20
Voltage
Detector
GND
Figure B
OUT pin
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 our 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 our company.
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
our company'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, fire containment 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. The X-ray exposure can influence functions and characteristics of the products. Confirm the product functions and
characteristics in the evaluation stage.
9. WLCSP products should be used in light shielded environments. The light exposure can influence functions and
characteristics of the products under operation or storage.
10. There can be variation in the marking when different AOI (Automated Optical Inspection) equipment is used. In the case
of recognizing the marking characteristic with AOI, please contact our sales or our distributor before attempting to use
AOI.
11. Please contact our sales representatives should you have any questions or comments concerning the products or
the technical information.
Official website
https://www.nisshinbo-microdevices.co.jp/en/
Purchase information
https://www.nisshinbo-microdevices.co.jp/en/buy/
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Nisshinbo Micro Devices:
R3117K181C-TR R3117Q092A-TR-FE R3117K251A-TR R3117Q102A-TR-FE R3117Q292A-TR-FE R3117N451ATR-FE R3117Q282A-TR-FE R3117K301A-TR R3117N301C-TR-FE R3117N201C-TR-FE R3117Q162A-TR-FE
R3117N071C-TR-FE R3117N311A-TR-FE R3117K151C-TR R3117Q122A-TR-FE R3117N271C-TR-FE
R3117Q222A-TR-FE R3117Q402A-TR-FE R3117N261A-TR-FE R3117N251A-TR-FE R3117Q312A-TR-FE
R3117Q242C-TR-FE R3117K161C-TR R3117K071A-TR R3117K071C-TR R3117K081C-TR R3117K091A-TR
R3117Q232A-TR-FE R3117Q422A-TR-FE R3117Q142A-TR-FE R3117Q152A-TR-FE R3117Q092C-TR-FE
R3117Q112A-TR-FE R3117Q132A-TR-FE R3117Q132C-TR-FE R3117N291A-TR-FE R3117N131A-TR-FE
R3117N151A-TR-FE R3117N161A-TR-FE R3117N201A-TR-FE R3117N081A-TR-FE R3117N101A-TR-FE
R3117N121A-TR-FE R3117N121C-TR-FE R3117K351A-TR R3117K361A-TR R3117K381C-TR R3117K421A-TR
R3117K451A-TR R3117K301C-TR R3117K311A-TR R3117K311C-TR R3117K331A-TR R3117K331C-TR
R3117K341A-TR R3117K271A-TR R3117K271C-TR R3117K281A-TR R3117K281C-TR R3117K291A-TR
R3117K211A-TR R3117K221A-TR R3117K231A-TR R3117K231C-TR R3117K241A-TR R3117K251C-TR
R3117K171A-TR R3117K181A-TR R3117K201A-TR R3117K201C-TR R3117K091C-TR R3117K101A-TR
R3117K141A-TR R3117K141C-TR R3117K161A-TR R3117N191A-TR-FE