R5438L305AA

R5438L NISSHINBO | Alldatasheet

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Technical content

1 to 3 Cells Li-Ion Battery Protection IC for Secondary Protection No. EA-417-251215 OUTLINE The R5438L is an overcharge protection IC for 1 to 3 serial cells Li-ion / Li-polymer rechargeable battery. This device provides the high- accuracy voltage detection function and the shutdown function can reduce the supply current to the minimum when all cell’s voltage becomes less than the shutdown detection voltage.

FEATURES

 Hi gh Voltage Tolerant Process  Low Supply Current During Operation, Cell-voltage: 3.9 V, 3-Cells ············ Typ. 0.85 µA  High-accuracy Voltage Detection Overcharge Detector Threshold (VDET1n(1)) ················· 4.10 V to 4.70 V, in 5 mV step  Shutdown Functions  1 to 3 Cells Selectable Battery Protection  Compact Package

APPLICATIONS

 Li-Ion or Li-Polymer Battery Protection (1) VDET1n, VREL1n : n =1, 2, 3 (2) The delay time can be reduced down to approx. 1/90 by applying a 4 V ± 0.2 V to the VDD ‒ VC1 pins.

No. EA-417-251215 SELECTION GUIDE The overcharge and the delay time are user-selectable options. Selection Guide Product Name Package Quantity per Reel Pb Free Halogen Free R5438Lxxx$∗-TR DFN1814-6C 5,000 pcs Yes Yes xxx: Specify the combination of the overcharge detector threshold (VDET1n) and the overcharge release voltage (VREL1n) (1). VDET1n(2): 4.10 V to 4.70 V in 5 mV step VREL1n(2): VDET1n – 0 V to VDET1n – 0.5 V in 50 mV step $: Specify the combination of the overcharge detection delay time (tVDET1) and the overcharge release delay time (tVREL1). Refer to Delay Time Code Table for details. Delay Time Code Table Code tVDET1 (s) tVREL1 (ms) A 2 16 B 4 16 C 6 16 D 1 16 ∗: Specify the function code. Function Code Table Code Overcharge Released Condition COUT Output A Voltage Release CMOS “H” Active (1) Refer to Product Code Table for details. (2) VDET1n, VREL1n: n = 1, 2, 3

No. EA-417-251215 Product Code List The product code is determined by the combination of the settable voltage (overcharge detector threshold: VDET1n and overcharge release voltage: VREL1n) and the delay time (overcharge detection delay time: tVDET1 and overcharge release delay time: tVREL1) and the function code. Product Code Table Product Name Settable Voltage (V) Delay Time VDET1n VREL1n tVDET1(s) tVREL1(ms) R5438L301AA 4.450 4.150 2 16 R5438L301BA 4.450 4.150 4 16 R5438L303AA 4.350 4.050 2 16 R5438L303BA 4.350 4.050 4 16 R5438L304AA 4.400 4.100 2 16 R5438L304BA 4.400 4.100 4 16 R5438L305AA 4.300 4.000 2 16 R5438L305BA 4.300 4.000 4 16 R5438L306CA 4.450 3.950 6 16 R5438L308BA 4.400 4.000 4 16 R5438L312AA 4.550 4.150 2 16 R5438L312BA 4.550 4.150 4 16 R5438L312CA 4.550 4.150 6 16 R5438L315AA 4.500 4.150 2 16 R5438L317BA 4.500 4.200 4 16 R5438L322BA 4.600 4.150 4 16 R5438L326DA 4.550 4.200 1 16 R5438L327AA 4.300 4.200 2 16 R5438L328BA 4.600 4.250 4 16 R5438L329BA 4.650 4.300 4 16 R5438L330AA 4.200 4.100 2 16 R5438L331BA 4.700 4.350 4 16 R5438L332BA 4.540 4.200 4 16 R5438L333BA 4.275 3.975 4 16 Please contact our sales representatives if required a product code other than the above combinations.

No. EA-417-251215 BLOCK DIAGRAM R5438L Block Diagram VC1 VC2 VC3 VD1-1 VD1-2 VD1-3 Regulator VDD Logic Circuit Oscillator Counter VSS COUT VR VR VR Shutdown Shutdown Shutdown Logic Circuit

No. EA-417-251215 PIN DESCRIPTIONS DFN1814-6C DFN1814-6C Pin Assignment Pin No. Symbol Description

1 COUT Overcharge Detection Output Pin

2 VDD Power Supply Pin

3 VC1 CELL1 Plus Pin

4 VC2 CELL2 Plus Pin

5 VC3 CELL3 Plus Pin

6 VSS IC Ground Pin

No. EA-417-251215 ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings (Ta = 25°C, VSS = 0 V) Symbol Item Rating Unit VDD Power Supply Voltage VC1-0.3 to VC1+6.5 VC1-0.3 to 26 V V VC1 VC2 VC3 CELL1 Plus Pin Input Voltage CELL2 Plus Pin Input Voltage CELL3 Plus Pin Input Voltage VC2-0.3 to VC2+6.5 VC3-0.3 to VC3+6.5 -0.3 to 6.5 V V V VCOUT COUT Pin Output Voltage -0.3 to VOH1+0.3 V PD Power Dissipation (Standard Land Pattern) 150 mW Tj Junction Temperature Range -40 to 125 °C Tstg Storage Temperature Range -55 to 125 °C ABSOLUTE MAXIMUM RATINGS Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause permanent damage and may degrade the lifetime and safety for both device and system using the device in the field. The functional operation at or over these absolute maximum ratings is not assured. RECOMMENDED OPERATING CONDITION Symbol Item Rating Unit VDD Operating Input Voltage 1.5 to 20 / V C1 +5 V V Ta Operating Temperature Range −40 to 85 °C RECOMMENDED OPERATING CONDITIONS All of electronic equipment should be designed that the mounted semiconductor devices operate within the recommended operating conditions. The semiconductor devices cannot operate normally over the recommended operating conditions, even if they are used over such conditions by momentary electronic noise or surge. And the semiconductor devices may receive serious damage when they continue to operate over the recommended operating conditions.

No. EA-417-251215

ELECTRICAL CHARACTERISTICS

VCELLn = CELLn (Ex. VCELL1 is a voltage difference between VC1 and VC2) n = 1, 2, 3, unless otherwise noted. The specifications surrounded by are guaranteed by Design Engineering at 0°C ≤ Ta ≤ 60°C. Symbol Item Conditions Min. T yp. Max. Unit Circuit (1) VDET1n CELLn Overcharge Detection Voltage Detect rising edge of supply voltage VDET1n -0.020V VDET1n VDET1n +0.020V V A VDET1n -0.025V VDET1n +0.025V VREL1n CELLn Overcharge Release Voltage Detect falling edge of supply voltage VREL1n -0.050V VREL1n VREL1n +0.050V V A tVDET1 Overcharge Detection Delay Time VCELLn = 3.9 V (n=2,3) VCELL1 = 3.9 V → 4.7 V (VDET1 ≤ tVDET1 x 0.8 tVDET1 tVDET1 x 1.2 s B tVREL1 Overcharge Release Delay Time VCELLn = 3.9 V (n=2,3) VCELL1 = 4.7 V (VDET1 ≤ 4.65V) / 4.75V (VDET1 > 4.65V) → 3.9 V 12.8 16 19.2 ms B VSHT Shutdown Detection Voltage Detect falling edge of supply voltage 3.2 3.5 3.8 V C VOH1 C OUT Pch. ON Voltage 1 IOH = 0μA, VCELLn = 4.7 V (VDET1 ≤ 4.65V) / 4.75V (VDET1 > 4.65V) 4.0 4.7 5.4 V D IOH = 0μA, VCELLn=4.7 V (VDET1 ≤ 4.65V) / 4.75V (VDET1 > 4.65V) (n = 1, at 1 cell protection) V DD VOH2 C OUT Pch. ON Voltage 2 IOH = -50μA, VCELLn = 4.7V (VDET1 ≤ 4.65V) / 4.75V (VDET1 > 4.65V) VOH1 -0.5V VOH1 -0.1V V E VOL COUT Nch. ON Voltlage IOL = 50μA,VCELLn = 3.9 V 0.1 0.5 V F ISHT Shutdown Current VCELLn = 3.1 V 0.1 µA G ISS Supply Current VCELLn = 3.9 V 0.85 1.7 µA G (1) Refer to TEST CIRCUITS for detail information.

No. EA-417-251215 TEST CIRCUITS A VC1 VC2 VSS VDD COUT V V OSCILLOSCOPE V VC3 B VC1 VC2 VSS VDD COUT V OSCILLOSCOPE VC3 C VC1 VC2 VSS VDD COUT V V V VC3 A A A D VC1 VC2 VSS VDD COUT VC3 V E VC1 VC2 VSS VDD COUT VC3 V A F VC1 VC2 VSS VDD COUT VC3 V A

No. EA-417-251215 G VC1 VC2 VSS VDD COUT VC3 A

No. EA-417-251215 THEORY OF OPERATION Overcharge Detection Circuit, VD1-n (n = 1, 2, 3) (See the following timing chart) While the cells are charged, the voltage between V C1 pin and VC2 pin (Cell-1 voltage), the voltage between VC2 pin and V C3 pin (Cell-2 voltage), and the voltage between VC3 pin and V SS pin (Cell-3 voltage) are supervised. If at least one of the cells’ voltage becomes equal or more than the overcharge detector threshold, the overcharge is detected, and an external charge control Nch. FET turns on with COUT pin being at "H" level and by cutting a fuse on the charger path, and charge stops. To reset the overcharge and make the COUT pin level to "L" again after detecting over -charge, in such conditions that a time when all the cells’ voltages are down to a level lower than overcharge released voltage. Internal fixed output delay times for overcharge detection and release from over -charge exist. Even if one of voltage of the cells keeps its level more than the overcharge detector threshold, and output delay time passes, overcharge voltage is detected. After detecting overcharge, even if all the cell voltages become equal or less than the released voltage from overcharge, if at least one of the cells voltage becomes higher than the released voltage from overcharge within the output delay time of the release from overcharge, then overcharge is not released. The output type of the COUT pin is CMOS output between V SS and the built -in regulator, and "H" level of COUT pin is the output voltage of the built-in regulator. Shutdown Function The voltage between VC1 pin and VC2 pin (Cell-1 voltage), the voltage between VC2 pin and VC3 pin (Cell-2 voltage), and the voltage between VC3 pin and VSS pin (Cell-3 voltage) are supervised. If the cell voltage becomes equal or less than the shutdown detector threshold, the overcharge detector of the cell is halted, as a result, the consumption current of IC itself (Shutdown current) is extremely reduced. If at least one of the cells voltage becomes higher than the shutdown detection voltage, the shutdown detection is released. Delay Shortening (DS) Function Applying a voltage of 4 V ± 0.2 V between VDD and VC1 can shorten the overcharge detection delay time (tVDET1) into approximately 1/90, likewise, the overcharge release delay time (tVREL1) into approximately 1/60.

No. EA-417-251215 1-cell/ 2-cell Protection Alternative By short-circuiting between cells, this device can meet as a protection IC for 1 or 3 cells placed in series. The following table indicates pins to short-circuit depending on protected cells. Protected Cells Pins to short-circuit 1-cell protection VC1 and VC2 pins, and VC3 and VSS pins 2-cell protection VC1 and VC2 pins, or VC3 and VSS pins If providing other connections except above short-circuit for 1 or 2 cells protection, perform thorough evaluation using the actual devices. Overcharge Operation Timing Chart V DET11 V REL11 V CELL1 t t V REL1 t V DET1 t V DET1 VR V SS COUT t V REL1 t V DET12 V REL12 V CELL2 t V DET13 V REL13 V CELL3 t Charge/Discharge Current Charge Current Discharge Current t Connect Charger Connect Load

No. EA-417-251215

APPLICATION INFORMATION

Typical Application Circuits in Normal Mode (CMOS Output, Active-high) As for the order of cell's connection, connect a positive terminal of CELL1 as the end terminal. If connected another terminal, a fuse blowout might be caused by transiently “High” output of the COUT pin. Typical Application Circuit for 3-cell Protection In Delay Shortening (DS) mode, applying a voltage of 4V between VDD and VC1 is required. R5438L VC1 VC2 VC3 VSS CELL1 CELL2 CELL3 VDD COUT Normal Output: “L” “H” Active SC PROTECTOR R VDD C VDD

No. EA-417-251215 Typical Application Circuit for 2-cell Protection -1 Typical Application Circuit for 2-cell Protection -2 R5438L VC1 VC2 VC3 VSS CELL1 CELL2 VDD COUT Normal Output: “L” “H” Active SC PROTECTOR R VDD C VDD R5438L VC1 VC2 VC3 VSS CELL1 CELL2 VDD COUT SC PROTECTOR RVDD CVDD Normal Output: “L” “H” Active In Delay Shortening (DS) mode, applying a voltage of 4V between VDD and VC1 is required. In Delay Shortening (DS) mode, applying a voltage of 4V between VDD and VC1 is required.

No. EA-417-251215 Typical Application Circuit for 1-cell Protection External Components Symbol Typ. Unit Range RVDD 100 Ω 100 to 1000 R1 1000 Ω 330 to 1000 R2 1000 Ω 330 to 1000 R3 1000 Ω 330 to 1000 CVDD 0.1 µF 0.01 to 1 C1 0.1 µF 0.01 to 1 C2 0.1 µF 0.01 to 1 C3 0.1 µF 0.01 to 1 R5438L VC1 VC2 VC3 VSS CELL1 VDD COUT Normal Output: “L” “H” Active SC PROTECTOR RVDD CVDD In Delay Shortening (DS) mode, applying a voltage of 4V between VDD and VC1 is required.

No. EA-417-251215 Technical Notes on the Selection Components

• The voltage fluctuation is stabilized with R VDD and C VDD. If a small R VDD is set, in the case of the large transient may happen to the cell voltage, by the flowing current, the IC may be unstable. If a large R VDD is set, by the consumption current of the IC itself, the voltage difference between V DD pin and V C1 pin is generated, and unexpected operation may result. Therefore, the appropriate value range of R VDD is from 100 Ω to 1 kΩ. To make a stable operation of the IC, the appropriate value range of CVDD is from 0.01 µF to 1.0 µF.
• The voltage fluctuation is stabilized with R1 to R3 and C1 to C3. If a R1 to R3 is too large, by the conduction current at detection, the detector threshold may shift higher. Therefore, the appropriate value range of R1 to R3 is equal or less than 1 kΩ. To make a stable operation of the IC, the appropriate value range of C1 to C3 is 0.01 µF or more.
• The typical application circuit diagrams are just examples. This circuit performance largely depends on the PCB layout and external components. In the actual application, fully evaluation is necessary.
• Overvoltage and the over current beyond the absolute maximum rating should not be forced to the protection IC and external components. During the time until the fuse is open after detecting overcharge, a large current may flow through the FET. Select an FET with large enough current capacity in order to endure the large current.
• To connect the SC protector, connect the SC protector to the cell must be the last. Contact Information for Inquiries regarding SC PROTECTOR Dexerials Corporation (Sony Chemical & Information Device Company Ltd.) URL: http://www.dexerials.jp

No. EA-417-251215 TYPICAL CHARACTERISTICS Part1. vs. Temperature 1) Celln Overcharge Detection Threshold vs. Temperature 2) Celln Overcharge Release Voltage vs. Temperature 3) Overcharge Output delay Time vs. Temperature 4) Released Delay Time from Overcharge vs. Temperature 5) Celln Shutdown Threshold vs. Temperature R5438L301AA V CELLn=3.9V(n=1,2,3) 4.42 4.43 4.44 4.46 4.47 4.48 -60 -40 -20 0 20 40 60 80 100 Temperature(℃) VDET1n(V) R5438L301AA V CELLn=3.9V(n=1,2,3) 4.05 4.1 4.15 4.2 4.25 -60 -40 -20 0 20 40 60 80 100 Temperature(℃) VREL1n(V) R5438L301AA VCELLn=3.9V(n=2,3). V CELL1=3.9V→4.7V 0.5 1.5 2.5 3.5 -60 -40 -20 0 20 40 60 80 100 Temperature(℃) tVDET1(s) R5438L306CA VCELLn=3.9V(n=2,3). V CELL1=3.9V→4.7V -60 -40 -20 0 20 40 60 80 100 Temperature(℃) tVDET1(s) R5438L301AA VCELLn=3.9V(n=2,3). V CELL1=4.7V→3.9V -60 -40 -20 0 20 40 60 80 100 Temperature(℃) tVREL1(s) R5438L301AA V CELLn=3.1V(n=1,2,3) 2.8 3.2 3.4 3.6 3.8 4.2 -60 -40 -20 0 20 40 60 80 100 Temperature(℃) VSHT1n(V) tVREL1(ms)

No. EA-417-251215 6) COUT Pch. On Voltage (No Load) vs. Temperature 7) COUT Pch. On Voltage vs. Temperature 8) COUT Nch. On Voltage vs. Temperature 9) Shutdown Current vs. Temperature 10) Supply Current vs. Temperature R5438L301AA V CELLn=4.7V(n=1,2,3),I OH=0uA 4.2 4.4 4.6 4.8 5.2 5.4 -60 -40 -20 0 20 40 60 80 100 Temperature(℃) VOH1(V) R5438L301AA V CELLn=4.7V(n=1,2,3),I OH=-50uA -0.5 -0.4 -0.3 -0. -0.1 -60 -40 -20 0 20 40 60 80 100 Temperature(℃) VOH2-VOH1(V) R5438L301AA V CELLn=3.9V(n=1,2,3),I OH=50uA 0.1 0.2 0.4 0.5 -60 -40 -20 0 20 40 60 80 100 Temperature(℃) VOL(V) R5438L301AA V CELLn=3.1V(n=1,2,3) 0.1 0.2 0.3 0.4 0.5 -60 -40 -20 0 20 40 60 80 100 Temperature(℃) Isht(uA) R5438L301AA V CELLn=3.9V(n=1,2,3) 0.2 0.4 0.6 0.8 1.2 1.4 1.6 1.8 -60 -40 -20 0 20 40 60 80 100 Temperature(℃) Iss(uA)

No. EA-417-251215 Part2. Supply Current vs. VDD (R5438L301AA) 3-cell Protection Supply Current vs. VDD Test Circuit R5438L301AA 0 5 10 15 20 VDD(V) Supply Current Iss(uA) 0.1µF 0.1µF 0.1µF 1kΩ 1kΩ 1kΩ R5438L VC1 CELL1 CELL2 CELL3 VSS VDD COUT Normally L Act H 100Ω 0.1µF A VC2 VC3

No. EA-417-251215 Part3. vs. External Resister Dependence (R5438L301AA) Overcharge Detection Voltage / Overcharge Release Voltage vs. R1 Test Circuit R5438L301AA 4.42 4.43 4.44 4.45 4.46 4.47 4.48 0 500 1000 1500 2000 R1(Ω) VDET11(V) 4.13 4.14 4.15 4.16 4.17 4.18 4.19 VDET11 VREL11 0.1µF 0.1µF 0.1µF 1kΩ 1kΩ R5438L VC1 VC2 VC3 CELL1 CELL2 CELL3 VSS VDD COUT Normally L Act H 100Ω 0.1µF

No. EA-417-251215 TECHNICAL NOTES A peripheral component or the device mounted on PCB should not exceed a rated voltage, a rated current or a rated power. When designing a peripheral circuit, please be fully aware of the following points.

• Please evaluate the product at the PCB level before use, as some symptoms may remain that cannot be confirmed by the evaluation at the IC level.
• When using any coating or underfill to improve moisture resistance or joining strength, evaluate them adequately before using. In certain materials or coating conditions, corrosion by contained constituents, current leakage by moisture absorption, crack and delamination by physical stress can happen. If the curing temperature of the coating material or underfill material exceeds the absolute maximum rating, the electrical characteristics of this product may change.
• When performing X -ray inspection in mass production process and evaluation build stage such as the product functions and characteristics confirmation, please confirm X -ray irradiation does not exceed 1.5Gy (absorbed dose for air).

PACKAGE DIMENSIONS DFN1814-6C Ver. A i

Ver. K i : Product Code … Refer to Part Marking List : Lot Number … Alphanumeric Serial Number R5438L (DFN1814-6C) Part Markings NOTICE 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 s ales or distributor before attempting to use AOI. R5438LxxxxA Part Marking List Product Name   Product Name   R5438L301AA HA R5438L32 9BA J D R5438L306CA HB R5438L3 30A A J E R5438L301BA HC R5438L 331 BA J F R5438L305BA HD R5438L 33 2BA J G R5438L308BA HE R5438L312 CA J H R5438L305AA HF R5438L 33 3BA J J R5438L303AA HG R5438L312BA HH R5438L304AA HJ R5438L304BA HK R5438L312AA HL R5438L303BA HM R5438L315AA H N R5438L317BA HP R5438L322BA HR R5438L326DA H S R5438L327AA HY R5438L328BA JB 6 5 4 1 2 3

1. T he 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 the prior written consent of us. 3. This product and any technical information relating thereto are subject to complementary export controls (so- called KNOW controls) under the Foreign Exchange and Foreign Trade Law, and related politics ministerial ordinance of the law. (Note that the complementary export controls are inapplicable to any application-specific products, except rockets and pilotless aircraft, that are insusceptible to design or program changes.) Accordingly, when exporting or carrying abroad this product, follow the Foreign Exchange and Foreign Trade Control Law and its related regulations with respect to the complementary export controls. 4. The technical information described in this document shows typical characteristics 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 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 should first contact us.

• Aerospace Equipment
• Equipment Used in the Deep Sea
• Power Generator Control Equipment (nuclear, steam, hydraulic, etc.)
• Life Maintenance Medical Equipment
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• Various Safety Devices
• Traffic control system
• Combustion equipment In case your company desires to use this product for any applications other than general electronic equipment mentioned above, make sure to contact our company in advance. Note that the important requirements mentioned in this section are not applicable to cases where operation requirements such as application conditions are confirmed by our company in writing after consultation with your company. 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. The products have been designed and tested to function within controlled environmental conditions. Do not use products under conditions that deviate from methods or applications specified in this datasheet. Failure to employ the products in the proper applications can lead to deterioration, destruction or failure of the products. We shall not be responsible for any bodily injury, fires or accident, property damage or any consequential damages resulting from misuse or misapplication of the products. 8. Quality Warranty 8-1. Quality Warranty Period In the case of a product purchased through an authorized distributor or directly from us, the warranty period for this product shall be one (1) year after delivery to your company. For defective products that occurred during this period, we will take the quality warranty measures described in section 8-2. However, if there is an agreement on the warranty period in the basic transaction agreement, quality assurance agreement, delivery specifications, etc., it shall be followed. 8-2. Quality Warranty Remedies When it has been proved defective due to manufacturing factors as a result of defect analysis by us, we will either deliver a substitute for the defective product or refund the purchase price of the defective product. Note that such delivery or refund is sole and exclusive remedies to your company for the defective product. 8-3. Remedies after Quality Warranty Period With respect to any defect of this product found after the quality warranty period, the defect will be analyzed by us. On the basis of the defect analysis results, the scope and amounts of damage shall be determined by mutual agreement of both parties. Then we will deal with upper limit in Section 8-2. This provision is not intended to limit any legal rights of your company. 9. Anti-radiation design is not implemented in the products described in this document. 10. The X-ray exposure can influence functions and characteristics of the products. Confirm the product functions and characteristics in the evaluation stage. 11. WLCSP products should be used in light shielded environments. The light exposure can influence functions and characteristics of the products under operation or storage. 12. Warning for handling Gallium and Arsenic (GaAs) products (Applying to GaAs MMIC, Photo Reflector). These products use Gallium (Ga) and Arsenic (As) which are specified as poisonous chemicals by law. For the prevention of a hazard, do not burn, destroy, or process chemically to make them as gas or power. When the product is disposed of, please follow the related regulation and do not mix this with general industrial waste or household waste. 13. 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/