Data Sheet 100mA POSITIVE VOLTAGE REGULATOR AS78LXX General Description Features The AS78LXX series are three terminal positive regulators designed for a wide variety of applications including local, on-card regulation. · · · This series of regulators are complete with internal current limiting, thermal shutdown protection, and safe-area compensation which make them virtually immune from output overload. If adequate heat sinking are provided, these regulators can deliver output currents up to 100mA. · · · · Applications The AS78LXX series are available in TO-92 (bulk or ammo packing), SOT-89 and SOIC-8 packages. TO-92(Bulk Packing) Output Current up to 100mA Fixed Output Voltages of 5V, 12V, 15V, 18V and 24V Output Voltage Accuracy of ±5% over the Full Temperature Range Internal Short Circuit Current Limiting Internal Thermal Overload Protection No External Components Output Transistor Safe-area Protection · · · TO-92(Ammo Packing) Consumer Electronics Microprocessor Power Supply Mother Board SOT-89 SOIC-8 Figure 1. Package Types of AS78LXX Aug. 2011 Rev. 1. 9 BCD Semiconductor Manufacturing Limited 1 Data Sheet 100mA POSITIVE VOLTAGE REGULATOR AS78LXX Pin Configuration Z Package Z Package (TO-92(Ammo Packing)) (TO-92(Bulk Packing)) 3 INPUT 3 INPUT 2 GND 2 GND 1 OUTPUT 1 OUTPUT M Package (SOIC-8) R Package (SOT-89) GND 3 INPUT 2 GND 1 OUTPUT 1 8 INPUT GND 2 7 GND GND 3 6 GND NC 4 5 NC OUTPUT Figure 2. Pin Configuration of AS78LXX (Top View) Aug. 2011 Rev. 1. 9 BCD Semiconductor Manufacturing Limited 2 Data Sheet 100mA POSITIVE VOLTAGE REGULATOR AS78LXX Functional Block Diagram 3 (8) R9 Q9 INPUT D1 Zener Q14 R16 Q21 Q24 R20 C1 R1 Q18 R17 R12 R23 1 (1) Q6 Q3 Q22 R3 Q11 OUTPUT R2 2 Q10 R18 R7 Q7 Q1 R21 Q4 Q16 R4 R14 Q8 R11 R5 R15 R6 Q23 Q13 Q5 Q2 Q15 R19 C2 Q19 Q17 Q12 R2 R8 Q20 R13 R10 2 (2,3,6,7) A (B) A for 3-pin GND B for 8-pin Figure 3. Functional Block Diagram of AS78LXX Aug. 2011 Rev. 1. 9 BCD Semiconductor Manufacturing Limited 3 Data Sheet 100mA POSITIVE VOLTAGE REGULATOR AS78LXX Ordering Information - AS78LXX E1: Lead Free G1: Green Circuit Type TR: Tape & Reel or Ammo Blank: Bulk Output Voltage 05: 05V 12: 12V 15: 15V 18: 18V 24: 24V Package TO-92 SOT-89 SOIC-8 Temperature Range -40 to 125oC -40 to 125oC -40 to 125oC Package Z: TO-92 R: SOT-89 M: SOIC-8 Blank: Normal Precision C: High Precision Part Number Lead Free Marking ID Green Lead Free Green Packing Type AS78L05Z-E1 AS78L05Z-G1 AS78L05Z-E1 AS78L05Z-G1 Bulk AS78L05ZTR-E1 AS78L05ZTR-G1 AS78L05Z-E1 AS78L05Z-G1 Ammo AS78L05CZTR-E1 AS78L05CZTR-G1 AS78L05Z-E1 AS78L05Z-G1 Ammo AS78L12Z-E1 AS78L12Z-G1 AS78L12Z-E1 AS78L12Z-G1 Bulk AS78L12ZTR-E1 AS78L12ZTR-G1 AS78L12Z-E1 AS78L12Z-G1 Ammo AS78L15Z-E1 AS78L15Z-G1 AS78L15Z-E1 AS78L15Z-G1 Bulk AS78L15ZTR-E1 AS78L15ZTR-G1 AS78L15Z-E1 AS78L15Z-G1 Ammo AS78L18Z-E1 AS78L18Z-G1 AS78L18Z-E1 AS78L18Z-G1 Bulk AS78L18ZTR-E1 AS78L18ZTR-G1 AS78L18Z-E1 AS78L18Z-G1 Ammo AS78L24Z-E1 AS78L24Z-G1 AS78L24Z-E1 AS78L24Z-G1 Bulk AS78L24ZTR-E1 AS78L24ZTR-G1 AS78L24Z-E1 AS78L24Z-G1 Ammo AS78L05RTR-E1 AS78L05RTR-G1 E78E G78E Tape & Reel AS78L12RTR-E1 AS78L12RTR-G1 E78F G78F Tape & Reel AS78L15RTR-E1 AS78L15RTR-G1 E78G G78G Tape & Reel AS78L18RTR-E1 AS78L18RTR-G1 E78H G78H Tape & Reel AS78L24RTR-E1 AS78L24RTR-G1 E78I G78I Tape & Reel AS78L05M-E1 AS78L05M-G1 AS78L05M-E1 AS78L05M-G1 Tube AS78L05MTR-E1 AS78L05MTR-G1 AS78L05M-E1 AS78L05M-G1 Tape & Reel AS78L12M-E1 AS78L12M-G1 AS78L12M-E1 AS78L12M-G1 Tube AS78L12MTR-E1 AS78L12MTR-G1 AS78L12M-E1 AS78L12M-G1 Tape & Reel AS78L15M-E1 AS78L15M-G1 AS78L15M-E1 AS78L15M-G1 Tube Tape & Reel AS78L15MTR-E1 AS78L15MTR-G1 AS78L15M-E1 AS78L15M-G1 AS78L18M-E1 AS78L18M-G1 AS78L18M-E1 AS78L18M-G1 Tube AS78L18MTR-E1 AS78L18MTR-G1 AS78L18M-E1 AS78L18M-G1 Tape & Reel AS78L24M-E1 AS78L24M-G1 AS78L24M-E1 AS78L24M-G1 Tube AS78L24MTR-E1 AS78L24MTR-G1 AS78L24M-E1 AS78L24M-G1 Tape & Reel BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with "G1" suffix are available in green packages. Aug. 2011 Rev. 1. 9 BCD Semiconductor Manufacturing Limited 4 Data Sheet 100mA POSITIVE VOLTAGE REGULATOR AS78LXX Absolute Maximum Ratings (Note 1) Parameter Input Voltage Operating Junction Temperature Lead Temperature (Soldering, 10sec) Power Dissipation Storage Temperature Range Symbol Value Unit VIN 36 V TJ 150 oC TLEAD 260 o PD 750 mW TSTG -65 to 150 oC C Thermal Resistance θJA ESD (Human Body Model) ESD 2000 V ESD (Machine Model) ESD 200 V TO-92 oC/W 180 Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. Recommended Operating Conditions Parameter Input Voltage Symbol Min Max AS78L05 30 AS78L12 36 AS78L15 VIN 36 AS78L18 36 AS78L24 36 Operating Junction Temperature Range TJ -40 Aug. 2011 Rev. 1. 9 125 Unit V o C BCD Semiconductor Manufacturing Limited 5 Data Sheet 100mA POSITIVE VOLTAGE REGULATOR AS78LXX Electrical Characteristics AS78L05 (VIN=10V, IOUT=40mA, CIN=0.33µF, COUT=0.1µF, TJ=25oC, Bold typeface applies over -40oC≤TJ≤125oC, unless otherwise specified.) Parameter Symbol Conditions Output Voltage VOUT 7V≤VIN≤20V, 1mA≤IOUT≤100mA, PD≤0.75W Line Regulation VRLINE 7V≤VIN≤20V 8 150 mV Load Regulation VRLOAD 1mA≤IOUT≤100mA 10 60 mV 3 5.5 mA Quiescent Current Quiescent Current Change Ripple Rejection Dropout Voltage Output Noise Voltage Output Voltage Temperature Coefficient Thermal Resistance Min 4.8 4.75 IQ ∆IQ PSRR VDROP NO ∆VOUT/∆T (∆VOUT/VOUT)/∆T θJC Typ 5.0 Max 5.2 5.25 8V≤VIN≤20V 1.5 1mA≤IOUT≤40mA 0.1 f=120Hz, 8V≤VIN≤18V 47 62 Unit V mA dB IOUT=40mA 1.7 IOUT=100mA 1.8 10Hz≤f≤100kHz (Note 2) 40 µV 0.42 mV/oC 84 ppm/oC 200 165 180 oC/W IOUT=5mA TO-92 SOT-89 SOIC-8 V Note 2: 0.01µF minimum load capacitance is recommended to limit high frequency noise. Aug. 2011 Rev. 1. 9 BCD Semiconductor Manufacturing Limited 6 Data Sheet 100mA POSITIVE VOLTAGE REGULATOR AS78LXX Electrical Characteristics AS78L05C (VIN=10V, IOUT=40mA, CIN=0.33µF, COUT=0.1µF, TJ=25oC, Bold typeface applies over -40oC≤TJ≤125oC, unless otherwise specified.) Parameter Output Voltage Symbol VOUT 5.1 V Line Regulation VRLINE 7V≤VIN≤20V 8 150 mV Load Regulation VRLOAD 1mA≤IOUT≤100mA 10 60 mV 5.5 mA Quiescent Current Quiescent Current Change Ripple Rejection Dropout Voltage Output Noise Voltage Output Voltage Temperature Coefficient Thermal Resistance Conditions Min PSRR VDROP NO ∆VOUT/∆T (∆VOUT/VOUT)/∆T θJC Max 5.0 IQ ∆IQ Typ 3 8V≤VIN≤20V 1.5 1mA≤IOUT≤40mA 0.1 f=120Hz, 8V≤VIN≤18V 47 1.7 IOUT=100mA 1.8 IOUT=5mA TO-92 SOT-89 SOIC-8 mA 62 IOUT=40mA 10Hz≤f≤100kHz (Note 2) Unit dB V 40 µV 0.42 mV/oC 84 ppm/oC 200 165 180 o C/W Note 2: 0.01µF minimum load capacitance is recommended to limit high frequency noise. Aug. 2011 Rev. 1. 9 BCD Semiconductor Manufacturing Limited 7 Data Sheet 100mA POSITIVE VOLTAGE REGULATOR AS78LXX Electrical Characteristics (Continued) AS78L12 (VIN=19V, IOUT=40mA, CIN=0.33µF, COUT=0.1µF, TJ=25oC, Bold typeface applies over -40oC≤TJ≤125oC, unless otherwise specified.) Parameter Symbol Conditions Output Voltage VOUT 14.5V≤VIN≤27V, 1mA≤IOUT≤100mA, PD≤0.75W Line Regulation VRLINE 14.5V≤VIN≤27V 20 250 mV Load Regulation VRLOAD 1mA≤IOUT≤100mA 20 100 mV 6 mA Quiescent Current Quiescent Current Change Ripple Rejection Dropout Voltage Output Noise Voltage Output Voltage Temperature Coefficient Thermal Resistance Min 11.5 11.4 IQ ∆IQ PSRR VDROP NO ∆VOUT/∆T (∆VOUT/VOUT)/∆T θJC Typ 12.0 Max 12.5 12.6 3 16V≤VIN≤27V 1.5 1mA≤IOUT≤40mA 0.1 f=120Hz, 15V≤VIN≤25V 37 42 Unit V mA dB IOUT=40mA 1.7 IOUT=100mA 1.8 10Hz≤f≤100kHz (Note 2) 80 µV IOUT=5mA 1 mV/oC 84 ppm/oC TO-92 SOT-89 SOIC-8 200 165 180 oC/W V Note 2: 0.01µF minimum load capacitance is recommended to limit high frequency noise. Aug. 2011 Rev. 1. 9 BCD Semiconductor Manufacturing Limited 8 Data Sheet 100mA POSITIVE VOLTAGE REGULATOR AS78LXX Electrical Characteristics (Continued) AS78L15 (VIN=23V, IOUT=40mA, CIN=0.33µF, COUT=0.1µF, TJ=25oC, Bold typeface applies over -40oC≤TJ≤125oC, unless otherwise specified.) Parameter Symbol Conditions Output Voltage VOUT 17.5V≤VIN≤30V, 1mA≤IOUT≤100mA, PD≤0.75W Line Regulation VRLINE 17.5V≤VIN≤30V 25 250 mV Load Regulation VRLOAD 1mA≤IOUT≤100mA 25 150 mV 6 mA Quiescent Current Quiescent Current Change Ripple Rejection Dropout Voltage Output Noise Voltage Output Voltage Temperature Coefficient Thermal Resistance Min 14.4 14.25 IQ ∆IQ PSRR VDROP NO ∆VOUT/∆T (∆VOUT/VOUT)/∆T θJC Typ 15.0 Max 15.6 15.75 3 20V≤VIN≤30V 1.5 1mA≤IOUT≤40mA 0.1 f=120Hz, 18.5V≤VIN≤28.5V 34 39 Unit V mA dB IOUT=40mA 1.7 IOUT=100mA 1.8 10Hz≤f≤100kHz (Note 2) 90 µV 1.25 mV/oC 84 ppm/oC 200 165 180 oC/W IOUT=5mA TO-92 SOT-89 SOIC-8 V Note 2: 0.01µF minimum load capacitance is recommended to limit high frequency noise. Aug. 2011 Rev. 1. 9 BCD Semiconductor Manufacturing Limited 9 Data Sheet 100mA POSITIVE VOLTAGE REGULATOR AS78LXX Electrical Characteristics (Continued) AS78L18 (VIN=27V, IOUT=40mA, CIN=0.33µF, COUT=0.1µF, TJ=25oC, Bold typeface applies over -40oC≤TJ≤125oC, unless otherwise specified.) Parameter Output Voltage Symbol Conditions VOUT 22V≤VIN≤33V, 1mA≤IOUT≤100mA, PD≤0.75W Min 17.3 Typ 18.0 17.1 Max 18.7 18.9 Unit V Line Regulation VRLINE 22V≤VIN≤33V 30 300 mV Load Regulation VRLOAD 1mA≤IOUT≤100mA 30 170 mV 3 6 mA Quiescent Current Quiescent Current Change IQ ∆IQ Ripple Rejection PSRR Dropout Voltage VDROP Output Noise Voltage Output Voltage Temperature Coefficient Thermal Resistance NO ∆VOUT/∆T (∆VOUT/VOUT)/∆T θJC 23V≤VIN≤33V 1.5 1mA≤IOUT≤40mA 0.1 f=120Hz, 23V≤VIN≤33V 33 38 mA dB IOUT=40mA 1.7 IOUT=100mA 1.8 10Hz≤f≤100kHz (Note 2) 150 µV 1.5 mV/oC 84 ppm/oC 200 165 180 oC/W IOUT=5mA TO-92 SOT-89 SOIC-8 V Note 2: 0.01µF minimum load capacitance is recommended to limit high frequency noise. Aug. 2011 Rev. 1. 9 BCD Semiconductor Manufacturing Limited 10 Data Sheet 100mA POSITIVE VOLTAGE REGULATOR AS78LXX Electrical Characteristics (Continued) AS78L24 (VIN=33V, IOUT=40mA, CIN=0.33µF, COUT=0.1µF, TJ=25oC, Bold typeface applies over -40oC≤TJ≤125oC, unless otherwise specified.) Parameter Symbol Conditions Output Voltage VOUT 27V≤VIN≤36V, 1mA≤IOUT≤100mA, PD≤0.75W Line Regulation VRLINE 27V≤VIN≤36V 50 300 mV Load Regulation VRLOAD 1mA≤IOUT≤100mA 40 200 mV 3 6 mA Quiescent Current Quiescent Current Change Ripple Rejection Dropout Voltage Output Noise Voltage Output Voltage Temperature Coefficient Thermal Resistance Min 23 22.8 IQ ∆IQ PSRR VDROP NO ∆VOUT/∆T (∆VOUT/VOUT)/∆T θJC Typ 24.0 Max 25 25.2 28V≤VIN≤36V 1.5 1mA≤IOUT≤40mA 0.1 f=120Hz, 29V≤VIN≤35V 31 37 Unit V mA dB IOUT=40mA 1.7 IOUT=100mA 1.8 10Hz≤f≤100kHz (Note 2) 200 µV V IOUT=5mA 2 mV/oC 84 ppm/oC TO-92 SOT-89 SOIC-8 200 165 180 oC/W Note 2: 0.01µF minimum load capacitance is recommended to limit high frequency noise. Aug. 2011 Rev. 1. 9 BCD Semiconductor Manufacturing Limited 11 Data Sheet 100mA POSITIVE VOLTAGE REGULATOR AS78LXX Typical Performance Characteristics 30 5.07 5.06 o TC=25 C 25 5.05 Output Voltage (V) Output Voltage (V) IOUT=40mA 20 AS78L05 AS78L12 AS78L24 15 10 5.04 5.03 5.02 5.01 AS78L05 VIN=10V 5.00 IOUT=1mA 5 0 0 5 10 15 20 25 30 4.99 35 -25 0 75 100 125 Figure 5. Output Voltage vs. Case Temperature Figure 4. Output Voltage vs. Input Voltage 2.0 26 24 1.8 VIN=10V/19V/33V 20 IOUT=1mA 1.6 18 Dropout Voltage (V) 22 AS78L05 AS78L12 AS78L24 16 14 12 10 8 6 1.4 1mA 40mA 70mA 100mA 1.2 1.0 0.8 0.6 AS78L05 VOUT=VOUT(nominal)x99% 0.4 4 0.2 2 0 50 o Input Voltage (V) Output Voltage (V) 25 Case Temperature ( C) 0 25 50 75 100 125 150 175 0.0 200 -25 0 25 50 75 100 125 o o Case Temperature ( C) Case Temperature ( C) Figure 7. Dropout Voltage vs. Case Temperature Figure 6. Over Temperature Protection Aug. 2011 Rev. 1. 9 BCD Semiconductor Manufacturing Limited 12 Data Sheet 100mA POSITIVE VOLTAGE REGULATOR AS78LXX Typical Performance Characteristics (Continued) 3.5 25 3.4 VIN=10V/19V/33V 20 TC=25 C Quiescent Current (mA) Output Voltage (V) 3.3 o AS78L05 AS78L12 AS78L24 15 10 3.2 3.1 3.0 2.9 2.8 2.7 5 AS78L05 VIN=10V IOUT=1mA 2.6 0 2.5 0 50 100 150 200 250 -25 0 50 75 100 125 o Output Current (mA) Figure 9. Quiescent Current vs. Case Temperature Figure 8. Output Voltage vs. Output Current 2.8 60 2.4 50 2.0 PSRR (dB) Power Dissipation (W) 25 Case Temperature ( C) 1.6 1.2 40 30 20 0.8 AS78L05 -25 0 IOUT=40mA CIN=0.33µF 10 0.4 0.0 AS78L05 VIN=10V 25 50 75 100 0 10 125 COUT=0.1µF 100 1000 10000 100000 1000000 Frequency (Hz) o Case Temperature ( C) Figure 11. PSRR vs. Frequency Figure 10. Power Dissipation vs. Case Temperature Aug. 2011 Rev. 1. 9 BCD Semiconductor Manufacturing Limited 13 Data Sheet 100mA POSITIVE VOLTAGE REGULATOR AS78LXX Typical Performance Characteristics (Continued) 200 ∆VOUT (100mV/Div) 15 AS78L05 10 5 IOUT (100mA/Div) ∆VOUT (20mV/Div) VIN (5V/Div) 20 20 0 -20 -40 AS78L05 100 0 -100 100 0 -100 -200 Time (40µs/Div) Time (20µs/Div) Figure 12. Line Transient (Conditions: IOUT=40mA, CIN=0.33µF, COUT=0.1µF) Aug. 2011 Rev. 1. 9 Figure 13. Load Transient (Conditions: VIN=10V, CIN=0.33µF, COUT=0.1µF) BCD Semiconductor Manufacturing Limited 14 Data Sheet 100mA POSITIVE VOLTAGE REGULATOR AS78LXX Typical Application AS78LXX VIN INPUT 0.33µF VOUT OUTPUT GND 0.1µF Figure 14. Typical Application of AS78LXX Aug. 2011 Rev. 1. 9 BCD Semiconductor Manufacturing Limited 15 Data Sheet 100mA POSITIVE VOLTAGE REGULATOR AS78LXX Mechanical Dimensions TO-92(Bulk Packing) Unit: mm(inch) 1.000(0. 039) 3.430(0.135) MIN 3.700(0.146) 3.300(0.130) 1.400(0. 055) 0.320(0. 013) 0.510(0. 020) 0. 000(0. 000) 0. 380(0. 015) Φ1. 600(0. 063) MAX 4.700(0.185) 1.270(0. 050) TYP 15.500(0.610) 0.360(0. 014) 0.760(0. 030) 12.500(0.492) 4.300(0.169) 4.400(0.173) 4.800(0.189) 2.420(0.095) 2.660(0.105) Aug. 2011 Rev. 1. 9 BCD Semiconductor Manufacturing Limited 16 Data Sheet 100mA POSITIVE VOLTAGE REGULATOR AS78LXX Mechanical Dimensions (Continued) TO-92(Ammo Packing) Unit: mm(inch) 1. 100(0. 043) 3. 430(0.135) MIN 1.270(0.050) Typ 2.500(0.098) 4.000 (0.157 ) 0. 000(0.000) 0. 380(0.015) Φ1. 600(0. 063) MAX 14.500(0.571) 12.500(0.492) 0.320(0. 013) 0. 510(0. 020) 3.800(0.150) 3.300(0.130) 1. 400(0.055) 4.700(0.185) 4.300(0.169) 4.400(0.173) 4.800 (0.189 ) 13.000(0. 512) 15.000 (0.591 ) 0.380(0.015) 0.550(0.022 ) 2.540(0.100) Typ Aug. 2011 Rev. 1. 9 BCD Semiconductor Manufacturing Limited 17 Data Sheet 100mA POSITIVE VOLTAGE REGULATOR AS78LXX Mechanical Dimensions (Continued) SOT-89 1.550(0.061)REF Unit: mm(inch) 4.400(0.173) 4.600(0.181) 1.400(0.055) 1.600(0.063) 1.030(0.041)REF 45 2.300(0.091) 2.600(0.102) 3.950(0.156) 4.250(0.167) 2.060(0.081)REF 3 0.900(0.035) 1.100(0.043) 0.320(0.013) 0.520(0.020) 0.480(0.019) 0.320(0.013) 0.520(0.020) 10 0.350(0.014) 0.450(0.018) 3.000(0.118) TYP 1.500(0.059) 1.800(0.071) 0.320(0.013)REF 3 2.210(0.087)REF 1.620(0.064)REF R0.150(0.006) 10 Aug. 2011 Rev. 1. 9 BCD Semiconductor Manufacturing Limited 18 Data Sheet 100mA POSITIVE VOLTAGE REGULATOR AS78LXX Mechanical Dimensions (Continued) SOIC-8 4.700(0.185) 5.100(0.201) 7° Unit: mm(inch) 0.320(0.013) 1.350(0.053) 1.750(0.069) 8° 8° 7° 0.675(0.027) D 0.725(0.029) 5.800(0.228) 1.270(0.050) 6.200(0.244) TYP D 20:1 0.300(0.012) R0.150(0.006) 0.100(0.004) 0.800(0.031) 0.200(0.008) 0° 8° 1.000(0.039) 3.800(0.150) 4.000(0.157) 0.330(0.013) 0.510(0.020) 0.190(0.007) 0.250(0.010) 1° 5° 0.900(0.035) R0.150(0.006) 0.450(0.017) 0.800(0.031) Note: Eject hole, oriented hole and mold mark is optional. Aug. 2011 Rev. 1. 9 BCD Semiconductor Manufacturing Limited 19 BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT NOTICE IMPORTANT NOTICE BCD Semiconductor BCD Semiconductor Manufacturing Manufacturing Limited Limited reserves reserves the the right right to to make make changes changes without without further further notice notice to to any any products products or or specifispecifications herein. cations herein. BCD BCD Semiconductor Semiconductor Manufacturing Manufacturing Limited Limited does does not not assume assume any any responsibility responsibility for for use use of of any any its its products products for for any any particular purpose, particular purpose, nor nor does does BCD BCD Semiconductor Semiconductor Manufacturing Manufacturing Limited Limited assume assume any any liability liability arising arising out out of of the the application application or or use use of any of any its its products products or or circuits. circuits. 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