curacy Order Number/Package Marking Temperature Range 0.5% 1% 2% LM431CCZ/ LM431CCZ LM431BCZ/ LM431BCZ LM431ACZ/ LM431ACZ 0C to +70C LM431CIZ/ LM431CIZ LM431BIZ/ LM431BIZ LM431AIZ/ LM431AIZ -40C to +85C LM431CCM/ 431CCM LM431BCM/ 431BCM LM431ACM/ LM431ACM LM431CCMX/ 431CCM LM431BCMX/ 431BCM LM431ACMX/ LM431ACM LM431CIM/ 431CIM LM431BIM/ 431BIM LM431AIM/ LM431AIM LM431CIMX/ 431CIM LM431BIMX/ 431BIM LM431AIMX/ LM431AIM LM431CCM3/ N1B LM431BCM3/ N1D LM431ACM3/ N1F LM431CCM3X/ N1B LM431BCM3X/ N1D LM431ACM3X/ N1F LM431CIM3 N1A LM431BIM3 N1C LM431AIM3 N1E LM431CIM3X N1A LM431BIM3X N1C LM431AIM3X N1E Transport Media NSC Drawing Rails Z03A Rails 0C to +70C Tape & Reel M08A Rails -40C to +85C Tape &Reel Rails 0C to +70C Tape & Reel MF03A Rails -40C to +85C Tape &Reel Symbol and Functional Diagrams 1005599 1005555 www.national.com 2 LM431 DC Test Circuits 1005504 1005505 Note: VZ = VREF (1 + R1/R2) + IREF* R1 FIGURE 1. Test Circuit for VZ = VREF FIGURE 2. Test Circuit for VZ > VREF 1005506 FIGURE 3. Test C

(c) 2003 Fairchild Semiconductor Corporation LM431A / LM431B / LM431C Rev. 1.1.0 www.fairchildsemi.com 1 LM431A / LM431B / LM431C -- Programmable Shunt Regulator December 2012 Part Number Operating Output Voltage Temperature Tolerance Range LM431CCZ 0.5% LM431CCMX LM431BCZX LM431BCZXA LM431BCMX -25 ~ +85C 1% LM431ACZ LM431ACZX 2% LM431ACMX Top Mark Package Packing Method LM431CCZ TO-92 Bulk LM431CCM 8-SOIC Tape and Reel LM431BCZ TO-92 Tape and Reel LM431BCZ TO-92 Ammo LM431BCM 8-SOIC Tape and Reel LM431ACZ TO-92 Bulk LM431ACZ TO-92 Tape and Reel LM431ACM 8-SOIC Tape and Reel LM431CIMX 0.5% LM431CIM 8-SOIC Tape and Reel LM431BIZX 1% LM431BIZ TO-92 Tape and Reel LM431AIZ TO-92 Bulk LM431AIM 8-SOIC Tape and Reel -40 ~ +85C LM431AIZ 2% LM431AIMX Block Diagram REFERENCE CATHODE + 2.5 Ref ANODE CATHODE (K) REFERENCE (R) ANODE (A) Figure 1. Block Diagram (c) 2003 Fairchild Semiconductor Corporation LM431A / LM431B / LM431C Rev. 1.1.0 www.fairchildsemi.com 2 LM431A / LM431B / LM431C -- Programmable Shun

l Accuracy Order Number/Package Marking 0.5% TO-92 SO-8 SOT-23 1% Temperature Range LM431BCZ/ LM431BCZ LM431ACZ/ LM431ACZ 0C to +70C LM431CIZ/ LM431CIZ LM431BIZ/ LM431BIZ LM431AIZ/ LM431AIZ -40C to +85C LM431CCM/ 431CCM LM431BCM/ 431BCM LM431ACM/ LM431ACM LM431CCMX/ 431CCM LM431BCMX/ LM431ACMX/ 431BCM LM431ACM LM431CIM/ 431CIM LM431BIM/ 431BIM LM431AIM/ LM431AIM LM431CIMX/ 431CIM LM431BIMX/ 431BIM LM431AIMX/ LM431AIM LM431CCM3/ N1B LM431BCM3/ LM431ACM3/ N1D N1F LM431BIM3 N1C - - Tape & Reel M08A Rails -40C to +85C Tape &Reel Rails 0C to +70C Tape & Reel MF03A LM431AIM3 N1E Rails -40C to +85C Tape &Reel LM431AIBP LM431AIBPX (Note 1) -40C to +85C Note 1: The micro SMD package marking is a 1 digit manufacturing Date Code only micro SMD Top View Marking Example 01005556 www.national.com Z03A 0C to +70C LM431BIM3X LM431AIM3X N1C N1E micro SMD Rails Rails LM431CCM3X/ LM431BCM3X/ LM431ACM3X/ N1B N1D N1F LM431CIM3X N1A NSC Drawing 2% LM431CCZ/ LM431CCZ LM431CIM3 N1A Transport Media 2 250 Units Tape and R

curacy Order Number/Package Marking Temperature Range 0.5% 1% 2% LM431CCZ/ LM431CCZ LM431BCZ/ LM431BCZ LM431ACZ/ LM431ACZ 0C to +70C LM431CIZ/ LM431CIZ LM431BIZ/ LM431BIZ LM431AIZ/ LM431AIZ -40C to +85C LM431CCM/ 431CCM LM431BCM/ 431BCM LM431ACM/ LM431ACM LM431CCMX/ 431CCM LM431BCMX/ 431BCM LM431ACMX/ LM431ACM LM431CIM/ 431CIM LM431BIM/ 431BIM LM431AIM/ LM431AIM LM431CIMX/ 431CIM LM431BIMX/ 431BIM LM431AIMX/ LM431AIM LM431CCM3/ N1B LM431BCM3/ N1D LM431ACM3/ N1F LM431CCM3X/ N1B LM431BCM3X/ N1D LM431ACM3X/ N1F LM431CIM3 N1A LM431BIM3 N1C LM431AIM3 N1E LM431CIM3X N1A LM431BIM3X N1C LM431AIM3X N1E Transport Media NSC Drawing Rails Z03A Rails 0C to +70C Tape & Reel M08A Rails -40C to +85C Tape &Reel Rails 0C to +70C Tape & Reel MF03A Rails -40C to +85C Tape &Reel Symbol and Functional Diagrams 1005599 1005555 www.national.com 2 LM431 DC Test Circuits 1005504 1005505 Note: VZ = VREF (1 + R1/R2) + IREF* R1 FIGURE 1. Test Circuit for VZ = VREF FIGURE 2. Test Circuit for VZ > VREF 1005506 FIGURE 3. Test C

perature Range * Low Output Noise Voltage * Fast Turn-on Response TO-92 1 1. Ref 2. Anode 3. Cathode 8-SOIC 1 1.Cathode 2.3.6.7.Anode 4.5.NC 8.Ref Ordering Information Part Number Operating Output Voltage Temperature Tolerance Range LM431CCZ Top Mark 0.5% LM431CCMX LM431BCZX LM431BCZXA LM431BCMX -25 ~ +85C 1% LM431ACZ LM431ACZX 2% LM431BIZX LM431AIZ -40 ~ +85C LM431AIMX (c) 2003 Fairchild Semiconductor Corporation LM431A / LM431B / LM431C Rev. 1.2.0 Packing Method LM431CCZ TO-92 Bulk LM431CCM 8-SOIC Tape and Reel LM431BCZ TO-92 Tape and Reel LM431BCZ TO-92 Ammo LM431BCM 8-SOIC Tape and Reel LM431ACZ TO-92 Bulk LM431ACZ TO-92 Tape and Reel LM431ACM 8-SOIC Tape and Reel 0.5% LM431CIM 8-SOIC Tape and Reel 1% LM431BIZ TO-92 Tape and Reel LM431AIZ TO-92 Bulk LM431AIM 8-SOIC Tape and Reel LM431ACMX LM431CIMX Package 2% www.fairchildsemi.com 1 LM431A / LM431B / LM431C -- Programmable Shunt Regulator June 2013 REFERENCE CATHODE + 2.5 Ref ANODE CATHODE (K) REFERENCE (R) ANODE (A) Figure 1. Block Diagram A

perature Range * Low Output Noise Voltage * Fast Turn-on Response TO-92 1 1. Ref 2. Anode 3. Cathode 8-SOIC 1 1.Cathode 2.3.6.7.Anode 4.5.NC 8.Ref Ordering Information Part Number Operating Output Voltage Temperature Tolerance Range LM431CCZ Top Mark 0.5% LM431CCMX LM431BCZX LM431BCZXA LM431BCMX -25 ~ +85C 1% LM431ACZ LM431ACZX 2% LM431BIZX LM431AIZ -40 ~ +85C LM431AIMX (c) 2003 Fairchild Semiconductor Corporation LM431A / LM431B / LM431C Rev. 1.2.0 Packing Method LM431CCZ TO-92 Bulk LM431CCM 8-SOIC Tape and Reel LM431BCZ TO-92 Tape and Reel LM431BCZ TO-92 Ammo LM431BCM 8-SOIC Tape and Reel LM431ACZ TO-92 Bulk LM431ACZ TO-92 Tape and Reel LM431ACM 8-SOIC Tape and Reel 0.5% LM431CIM 8-SOIC Tape and Reel 1% LM431BIZ TO-92 Tape and Reel LM431AIZ TO-92 Bulk LM431AIM 8-SOIC Tape and Reel LM431ACMX LM431CIMX Package 2% www.fairchildsemi.com 1 LM431A / LM431B / LM431C -- Programmable Shunt Regulator June 2013 REFERENCE CATHODE + 2.5 Ref ANODE CATHODE (K) REFERENCE (R) ANODE (A) Figure 1. Block Diagram A

perature Range * Low Output Noise Voltage * Fast Turn-on Response TO-92 1 1. Ref 2. Anode 3. Cathode 8-SOIC 1 1.Cathode 2.3.6.7.Anode 4.5.NC 8.Ref Ordering Information Part Number Operating Output Voltage Temperature Tolerance Range LM431CCZ Top Mark 0.5% LM431CCMX LM431BCZX LM431BCZXA LM431BCMX -25 ~ +85C 1% LM431ACZ LM431ACZX 2% LM431BIZX LM431AIZ -40 ~ +85C LM431AIMX (c) 2003 Fairchild Semiconductor Corporation LM431A / LM431B / LM431C Rev. 1.2.0 Packing Method LM431CCZ TO-92 Bulk LM431CCM 8-SOIC Tape and Reel LM431BCZ TO-92 Tape and Reel LM431BCZ TO-92 Ammo LM431BCM 8-SOIC Tape and Reel LM431ACZ TO-92 Bulk LM431ACZ TO-92 Tape and Reel LM431ACM 8-SOIC Tape and Reel 0.5% LM431CIM 8-SOIC Tape and Reel 1% LM431BIZ TO-92 Tape and Reel LM431AIZ TO-92 Bulk LM431AIM 8-SOIC Tape and Reel LM431ACMX LM431CIMX Package 2% www.fairchildsemi.com 1 LM431A / LM431B / LM431C -- Programmable Shunt Regulator June 2013 REFERENCE CATHODE + 2.5 Ref ANODE CATHODE (K) REFERENCE (R) ANODE (A) Figure 1. Block Diagram A

perature Range * Low Output Noise Voltage * Fast Turn-on Response TO-92 1 1. Ref 2. Anode 3. Cathode 8-SOIC 1 1.Cathode 2.3.6.7.Anode 4.5.NC 8.Ref Ordering Information Part Number Operating Output Voltage Temperature Tolerance Range LM431CCZ Top Mark 0.5% LM431CCMX LM431BCZX LM431BCZXA LM431BCMX -25 ~ +85C 1% LM431ACZ LM431ACZX 2% LM431BIZX LM431AIZ -40 ~ +85C LM431AIMX (c) 2003 Fairchild Semiconductor Corporation LM431A / LM431B / LM431C Rev. 1.2.0 Packing Method LM431CCZ TO-92 Bulk LM431CCM 8-SOIC Tape and Reel LM431BCZ TO-92 Tape and Reel LM431BCZ TO-92 Ammo LM431BCM 8-SOIC Tape and Reel LM431ACZ TO-92 Bulk LM431ACZ TO-92 Tape and Reel LM431ACM 8-SOIC Tape and Reel 0.5% LM431CIM 8-SOIC Tape and Reel 1% LM431BIZ TO-92 Tape and Reel LM431AIZ TO-92 Bulk LM431AIM 8-SOIC Tape and Reel LM431ACMX LM431CIMX Package 2% www.fairchildsemi.com 1 LM431A / LM431B / LM431C -- Programmable Shunt Regulator June 2013 REFERENCE CATHODE + 2.5 Ref ANODE CATHODE (K) REFERENCE (R) ANODE (A) Figure 1. Block Diagram A

LM4871 LM4890 LM4891 LM4894 LM4895 LM556 LM556 LM556 LM556 LM556 LM723 LM723 LM723 LM723 LM723 LM74 LM74 LM74 LM74 LM741 LM741 LM741 LM741 LM741 LM747 LM747 LM431ACMX LM431ACZ LM431AIM LM431AIM3 LM431AIM3X LM431AIMX LM431AIZ LM431CCM LM431CCM3 LM431CCM3X LM431CCMX LM431CCZ LM431CIM LM431CIM3 LM431CIM3X LM431CIMX LM431CIZ LM4665ITL LM4667ITL LM4860M LM4861M LM4871LD LM4890LD LM4891LD LM4894LD LM4895LD LM556CJ LM556CM LM556CMX LM556CN LM556J LM723CJ LM723CM LM723CMX LM723CN LM723J LM74CIM-3 LM74CIM-5 LM74CIMX-3 LM74CIMX-5 LM741CJ LM741CM LM741CMX LM741CN LM741J LM747CJ LM747CN Discontinued 04/04/1995 Discontinued 04/04/1995 Discontinued 03/10/1998 0 to 70 0 to 70 -40 to 85 -40 to 85 -40 to 85 -40 to 85 -40 to 85 0 to 70 0 to 70 0 to 70 0 to 70 0 to 70 -40 to 85 -40 to 85 -40 to 85 -40 to 85 -40 to 85 -40 to 85 -40 to 85 -20 to 85 -40 to 85 -40 to 85 -40 to 85 -40 to 85 -40 to 85 -40 to 85 0 to 70 0 to 70 0 to 70 0 to 70 0 to 70 0 to 70 0 to 70 0 to 70 0 to 70 -55 to 125 -55 to 150 -55 to 150 -55 t

LM431AIZXA LM431BCM LM431BCM LM431BCM3 LM431BCM3X LM431BCMX LM431BCMX LM431BCN LM431BCZ LM431BCZ LM431BCZX LM431BCZXA LM431BIM LM431BIM LM431BIM3 LM431BIM3X LM431BIMX LM431BIMX LM431BIZ LM431BIZ LM431BIZX LM431BIZXA LM431CCM LM431CCM LM431CCM3 LM431CCM3X LM431CCMX LM431CCMX LM431CCZ LM431CCZ LM431CCZX LM431CCZXA LM431CIM LM431CIM LM431CIM3 LM431CIM3X LM431CIMX LM431CIMX LM431CIZ LM431CIZ LM431CIZX LM431CIZXA LM431SACMFX LM431SACMLX LM431SBCMFX LM431SBCMLX LM431SCCMFX LM431SCCMLX LM555CM LM555CM LM555CMX LM555CMX LM555CN LM555CN LM556CJ LM556CM LM556CM LM556CMX LM556CMX LM556CN LM556CN LM723CD Competitor ST Microelectronics (STM) ST Microelectronics (STM) National Semiconductor (NSC) National Semiconductor (NSC) National Semiconductor (NSC) National Semiconductor (NSC) ST Microelectronics (STM) National Semiconductor (NSC) ST Microelectronics (STM) National Semiconductor (NSC) National Semiconductor (NSC) Fairchild Semiconductor National Semiconductor (NSC) Fairchild Semiconductor Na

23 LM723 LM7301 LM74 LM74 LM741 LM741 OPN LM431ACMX LM431ACZ LM431AIM LM431AIM3 LM431AIM3X LM431AIMX LM431AIZ LM431BCM LM431BCM3 LM431BCM3X LM431BCMX LM431BCZ LM431BIM LM431BIM3 LM431BIM3X LM431BIMX LM431BIZ LM431BCZ LM431BIZ LM431CCM LM431CCM3 LM431CCM3X LM431CCMX LM431CCZ LM431CIM LM431CIM3 LM431CIM3X LM431CIMX LM431CIZ LM431CCZ LM431CIZ LM4665ITL LM4667ITL LM4860M LM4861M LM4871LD LM4890LD LM4891LD LM4894LD LM4895LD LM555CM LM555CMX LM555CN LM556CJ LM556CM LM556CMX LM556CN LM556J-MIL LM556J-MIL LM556J-MIL LM556J-MIL LM556J-MIL LM556J-MIL LM556J LM607CN LM723CN LM723CJ LM723CM LM723CMX LM723J Av, CMMR, GBW, PSRR, Vs differ LM7301IM5 LM74CIM-3 LM74CIM-5 LM741CN LM741J TI Texas Instruments Orderable Part Number Comments Discontinued 10/13/1996 Discontinued 04/04/1995 Discontinued 04/04/1995 Discontinued 07/15/1995 Discontinued 07/15/1995 Av, CMMR, GBW, PSRR, Vs differ Discontinued 04/04/1995 14 8 14 14 14 14 14 Industry Package SOIC TO-92 SOIC SOT-23 SOT-23 SOIC TO-92 SOIC SOT-23 SOT-23 SOIC TO-9

. 512-FAN431AZXA 512-FAN431LZXA 512-KA431ZTA 512-FAN431ZXA 512-KA431ADTF 512-KA431AZBU 512-KA431AZTA 512-KA431SMFTF 512-LM336BZ50 512-LM336Z25X 512-LM336Z5 512-LM336Z5X 512-LM431ACZXA 512-LM431ACZX 512-LM431AIMX 512-LM431AIZ 512-LM431BCMX 512-LM431BIZ 512-LM431CCMX 512-LM431CCZ 512-LM431CIMX 512-LM431SACMFX 512-LM431SBCMFX 512-LM431SCCMFX 512-LM431SCCMLX 512-TL431ACD 512-TL431ACZ 512-TL431CLP (c) Copyright 2011 Mouser Electronics Package mouser.com/fairchildsemi 1.48 1.07 1.67 .47 .42 .48 .48 .54 .54 .67 .54 .67 .49 .40 .40 .40 .40 .40 .40 .40 .40 .78 .78 .78 .78 .85 1.34 1.35 1.27 .24 .71 .70 .70 .71 .70 .88 .50 .48 .48 .30 .30 25 100 1.27 1.06 .906 .762 1.33 1.04 .349 .262 .302 .269 .356 .268 .356 .268 .356 .302 .356 .302 .416 .395 .356 .302 .416 .395 .423 .353 .339 .282 .339 .282 .339 .282 .339 .282 .339 .282 .339 .282 .339 .282 .339 .282 .652 .522 .652 .522 .652 .522 .652 .522 .734 .613 1.18 .966 1.18 .975 1.11 .915 .212 .191 .635 .538 .621 .529 .621 .529 .628 .536 .621 .529 .783 .667 .438 .3

N/A N/A Buy Now 1K+ $0.1200 reel [logo]2T of LM431 2500 AIM LM431BCMX SOIC NARROW 8 MSL Full production N/A N/A Buy Now 1K+ $0.2000 reel [logo]2T of 431 2500 BCM LM431BIMX SOIC NARROW 8 MSL Full production N/A N/A 1K+ $0.3300 reel [logo]2T of 431 2500 BIM LM431CCMX SOIC NARROW 8 MSL Full production N/A N/A 1K+ $0.4800 reel [logo]2T of 431 2500 CCM LM431CIMX SOIC NARROW 8 MSL Full production N/A N/A 1K+ $0.5600 reel [logo]2T of 431 2500 CIM LM431ACM3 SOT-23 3 MSL Full production N/A N/A 1K+ $0.1500 reel of 1000 N1F 1T LM431AIM3 SOT-23 3 MSL Full production N/A N/A 1K+ $0.2100 reel of 1000 N1E 1T LM431BCM3 SOT-23 3 MSL Full production N/A N/A 1K+ $0.2000 reel of 1000 N1D 1T 1K+ $0.3300 reel of 1000 N1C 1T 1K+ $0.4300 reel of 1000 N1B 1T 1K+ $0.5600 reel of 1000 N1A 1T LM431BCM SOIC NARROW 8 MSL Full production LM431BIM SOIC NARROW LM431CCM Buy Now Samples Buy Now Buy Now Buy Now Buy Now Samples Buy Now Samples Buy Now Samples Buy Now Samples LM431BIM3 SOT-23 LM431CCM3 SOT-23 3 MSL Full production N

317LZTFR LM431ACM LM431BCM ISL9V5036S3ST_NB82031B ISL9V5036S3_NB82032A LM258AM LM258AM LM258AMX KA2803BDTF NONE KA2807DTF LM2902M LM2902MX LM2903M LM2904M LM2904MX KA317MRTM LM324AM LM324M NONE LM336Z25 LM336Z5 LM358M NONE NONE LM393M LM431BCZXA LM431ACMX LM431CCMX LM431CCZXA LM431ACZXA NONE NONE NONE LM741CM NONE NONE NONE NONE NONE NONE NONE KA76L05ZTA KA7809ERTM KA7812ERTM KA78L05ADTF NONE KA78L08AZTA KA78L09AZTA KA78L10AZTA NONE NONE KA78L12AZTA KA78L15AZTA KA78L18AZTA KA78M05RTM KA78M08RTM KA78M12RTM NONE NONE NONE NONE NONE NONE LF347N NONE LF353N KSH41CTF NONE NONE NONE NONE NONE NONE NONE LM317LZX LM431ACMX LM431BCMX Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor N/A Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor N/A Fairchild

317LZTFR LM431ACM LM431BCM ISL9V5036S3ST_NB82031B ISL9V5036S3_NB82032A LM258AM LM258AM LM258AMX KA2803BDTF NONE KA2807DTF LM2902M LM2902MX LM2903M LM2904M LM2904MX KA317MRTM LM324AM LM324M NONE LM336Z25 LM336Z5 LM358M NONE NONE LM393M LM431BCZXA LM431ACMX LM431CCMX LM431CCZXA LM431ACZXA NONE NONE NONE LM741CM NONE NONE NONE NONE NONE NONE NONE KA76L05ZTA KA7809ERTM KA7812ERTM KA78L05ADTF NONE KA78L08AZTA KA78L09AZTA KA78L10AZTA NONE NONE KA78L12AZTA KA78L15AZTA KA78L18AZTA KA78M05RTM KA78M08RTM KA78M12RTM NONE NONE NONE NONE NONE NONE LF347N NONE LF353N KSH41CTF NONE NONE NONE NONE NONE NONE NONE LM317LZX LM431ACMX LM431BCMX Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor N/A Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor Fairchild Semiconductor N/A Fairchild