Please enter a valid full or partial manufacturer part number with a minimum of 3 letters or numbers

    TCM811 Search Results

    SF Impression Pixel

    TCM811 Price and Stock

    Microchip Technology Inc TCM811TERCTR

    IC SUPERVISOR 1 CHANNEL SOT143
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey TCM811TERCTR Reel 3,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.40299
    		Buy Now
    Quest Components TCM811TERCTR 1,760
    • 1 $5.4
    • 10 $5.4
    • 100 $5.4
    • 1000 $2.7
    • 10000 $2.7
    		Buy Now

    Microchip Technology Inc TCM811RERCTR

    IC SUPERVISOR 1 CHANNEL SOT143
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey TCM811RERCTR Reel 3,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.40299
    		Buy Now

    Microchip Technology Inc TCM811LERCTR

    IC SUPERVISOR 1 CHANNEL SOT143
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey TCM811LERCTR Reel 3,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.40299
    		Buy Now
    Bristol Electronics TCM811LERCTR 2,850
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    		Get Quote

    Microchip Technology Inc TCM811MERCTR

    IC SUPERVISOR 1 CHANNEL SOT143
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey TCM811MERCTR Reel 3,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.40299
    		Buy Now

    Microchip Technology Inc TCM811SERCTR

    IC SUPERVISOR 1 CHANNEL SOT143
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey TCM811SERCTR Reel 3,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.40299
    		Buy Now
    Bristol Electronics TCM811SERCTR 2,028
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    		Get Quote
    Find more TCM811 price and stock on Findchips.com

    TCM811 Datasheets (32)

    Part ECAD Model Manufacturer Description Curated Type PDF
    TCM811 Microchip Technology 4-Pin Reset Monitors Original PDF
    TCM811 Unknown TCM811-TCM812 Original PDF
    TCM811FERC Microchip Technology 4-Pin Microcontroller Reset Monitor Original PDF
    TCM811FERC Microchip Technology 4-Pin Microcontroller Reset Monitors Original PDF
    TCM811FERCTR Microchip Technology PMIC - Supervisors, Integrated Circuits (ICs), IC RESET MONITOR 1.75V SOT143-4 Original PDF
    TCM811FERCTR Microchip Technology 4-Pin Microcontroller Reset Monitor Original PDF
    TCM811LERC Microchip Technology 4-Pin Microcontroller Reset Monitor Original PDF
    TCM811LERC Microchip Technology 4-Pin Microcontroller Reset Monitors Original PDF
    TCM811LERCTR Microchip Technology PMIC - Supervisors, Integrated Circuits (ICs), IC RESET MONITOR 4.63V SOT143-4 Original PDF
    TCM811LERCTR Microchip Technology 4-Pin Microcontroller Reset Monitor Original PDF
    TCM811MERC Microchip Technology 4-Pin Microcontroller Reset Monitor Original PDF
    TCM811MERC Microchip Technology 4-Pin Microcontroller Reset Monitors Original PDF
    TCM811MERCTR Microchip Technology PMIC - Supervisors, Integrated Circuits (ICs), IC RESET MONITOR 4.38V SOT143-4 Original PDF
    TCM811MERCTR Microchip Technology 4-Pin Microcontroller Reset Monitor Original PDF
    TCM811RERC Microchip Technology 4-Pin Microcontroller Reset Monitor Original PDF
    TCM811RERC Microchip Technology 4-Pin Microcontroller Reset Monitors Original PDF
    TCM811RERCTR Microchip Technology PMIC - Supervisors, Integrated Circuits (ICs), IC RESET MONITOR 2.63V SOT143-4 Original PDF
    TCM811RERCTR Microchip Technology 4-Pin Microcontroller Reset Monitor Original PDF
    TCM811SERC Microchip Technology 4-Pin Microcontroller Reset Monitor Original PDF
    TCM811SERC Microchip Technology 4-Pin Microcontroller Reset Monitors Original PDF

    TCM811 Datasheets Context Search

    Catalog Datasheet MFG & Type PDF Document Tags

    TCM811LERCTR

    Abstract: TCM812TERCTR TCM811 TCM812 TCM81x RESET20
    Text: TCM811/TCM812 4-Pin Reset Monitors Features General Description • Precision VDD Monitor for 2.0V, 2.8V, 3.0V, 3.3V, 5.0V Nominal Supplies • Manual Reset Input • 140 ms Minimum RESET Output Duration • RESET Output Valid to VDD = 1.0V TCM811 • Low 6 µA (typ.) Supply Current


    Original     		PDF TCM811/TCM812 TCM811) OT-143 MAX811/812 TCM811 TCM812 o36-4803 DS21615C-page TCM811LERCTR TCM812TERCTR TCM81x RESET20

    sot143 marking code A3

    Abstract: TCM811 TCM812 marking a4 SOT-143 mark tr sot-143
    Text: M TCM811/TCM812 4-Pin Microcontroller Reset Monitors Features General Description • Precision VDD Monitor for 2.0V, 2.8V, 3.0V, 3.3V, 5.0V Nominal Supplies • Manual Reset Input • 140 msec Minimum RESET Output Duration • RESET Output Valid to V DD = 1.0V TCM811


    Original     		PDF TCM811/TCM812 TCM811) OT-143 MAX811/812 TCM811 TCM812 D-81739 DS21615B* DS21615B-page sot143 marking code A3 marking a4 SOT-143 mark tr sot-143

    Untitled

    Abstract: No abstract text available
    Text: TCM811/TCM812 4-Pin Reset Monitors Features General Description • Precision VDD Monitor for 2.0V, 2.8V, 3.0V, 3.3V, 5.0V Nominal Supplies • Manual Reset Input • 140 ms Minimum RESET Output Duration • RESET Output Valid to VDD = 1.0V TCM811 • Low 6 µA (typ.) Supply Current


    Original     		PDF TCM811/TCM812 TCM811) OT-143 MAX811/812 TCM811 TCM812 DS21615C-page

    TCM812LERC

    Abstract: TCM81x TCM811 TCM812
    Text: TCM811/TCM812 4 引脚单片机复位监控器 特性 概述 • 高精度 VDD 监控电路，可对额定电压为 2.0V 2.8V、 3.0V、 3.3V 和 5.0V 的电源进行监控 • 手动复位输入 • 140 毫秒 RESET 最小输出周期 • VDD 低至 1.0V 时， RESET 输出仍然有效


    Original     		PDF TCM811/TCM812 TCM811 OT-143 MAX811/812 TCM812 TCM811 TCM812 TCM812LERC TCM81x

    marking a4 SOT-143

    Abstract: TCM811 TCM812 sot-143 aps
    Text: M TCM811/TCM812 4-Pin Microcontroller Reset Monitors Features General Description • Precision VDD Monitor for 2.0V, 2.8V, 3.0V, 3.3V, 5.0V Nominal Supplies • Manual Reset Input • 140 msec Minimum RESET Output Duration • RESET Output Valid to V DD = 1.0V TCM811


    Original     		PDF TCM811/TCM812 TCM811) OT-143 MAX811/812 TCM811 TCM812 D-81739 DS21615B* DS21615B-page marking a4 SOT-143 sot-143 aps

    F2M03GLA-S01

    Abstract: BCCMD free2move Wireless Bluetooth V2.0 Transceiver Module RS232 BlueCore BCCMD Commands Bluetooth F2M03GLA bluetooth development board schematic bluetooth Keyboard Mouse bluetooth RS232 wireless bluetooth RS232 transceiver TTL
    Text: Rev: b Low power Bluetooth Module with antenna- F2M03GLA Datasheet Features • • • • • • • • • • • • • • • Fully qualified end product with Bluetooth™ v2.0+EDR, CE and FCC Low power consumption Integrated high output antenna


    Original     		PDF F2M03GLA 11b/g F2M03GLA-S01 BCCMD free2move Wireless Bluetooth V2.0 Transceiver Module RS232 BlueCore BCCMD Commands Bluetooth F2M03GLA bluetooth development board schematic bluetooth Keyboard Mouse bluetooth RS232 wireless bluetooth RS232 transceiver TTL

    mark 303 SOT-23

    Abstract: c3nn C4NN
    Text: TC1270A/71A Voltage Supervisor with Manual Reset Input Package Types SOT-143 SOT-143 1 RST 2 4 VDD VSS 1 3 MR 2 RST 2 MR 3 5 4 VDD 3 MR VSS RST NC 1 VDD 2 MR 3 TC1271A VDD TC1270A 1 4 SOT-23-5 SOT-23-5 NC TC1271A VSS TC1270A • Precision voltage monitor - 2.63V, 2.93V, 3.08V, 4.38V and 4.63V trip


    Original     		PDF TC1270A/71A TC1270, TC1271 TCM811, TCM812 OT-143 OT-23 VS-3-572-9526 DS22035A-page mark 303 SOT-23 c3nn C4NN

    SOT233

    Abstract: TC3400 equivalent reset to92 TC3400 MCP102 MCP103 MCP121 MCP131 MCP41XX
    Text: MCP102/103/121/131 - Microcontroller Supervisor Product Family Product Summary: Microchip’s extensive family of low-cost, precision system supervisors allow the implementation of system reset circuits that protect the system from improper operation when the system voltage drops below a predetermined


    Original     		PDF MCP102/103/121/131 TC340X DS21905A SOT233 TC3400 equivalent reset to92 TC3400 MCP102 MCP103 MCP121 MCP131 MCP41XX

    Untitled

    Abstract: No abstract text available
    Text: TC1270A/70AN/71A Voltage Supervisor with Manual Reset Input Features: Package Types SOT-143 SOT-143 1 RST 2 TC1270A TC1270AN VSS 4 VDD VSS 1 3 MR 2 RST 2 MR 3 5 4 VDD 3 MR VSS RST NC 1 VDD 2 MR 3 TC1271A VDD TC1270A TC1270AN 1 4 SOT-23-5 SOT-23-5 NC TC1271A


    Original     		PDF TC1270A/70AN/71A OT-143 TC1270A TC1270AN TC1271A OT-23-5

    1H08S

    Abstract: PI6C2405A-1HW ASM706CUA SOIC-6 microchip ADM809RAR ADM705AN MAX809SEUR T ASM5P2309-1H-16-S K7N163601B MAX810JEUR
    Text: Supervisors Cross Reference Guide Alliance Maxim/Dallas IMP ASM1232LP DS1232LPS-2 IMP1232LP ASM1232LPCMA DS1232LP IMP1232LPCMA ASM1232LPEMA DS1232LP IMP1232LPEMA ASM1232LPN DS1232LP IMP1232LPN Analog Devices Micrel Microchip MIC1232N TC1232CPA - - - - - -


    Original     		PDF ASM1232LP DS1232LPS-2 IMP1232LP ASM1232LPCMA DS1232LP IMP1232LPCMA ASM1232LPEMA IMP1232LPEMA ASM1232LPN 1H08S PI6C2405A-1HW ASM706CUA SOIC-6 microchip ADM809RAR ADM705AN MAX809SEUR T ASM5P2309-1H-16-S K7N163601B MAX810JEUR

    PIC16f690 example codes

    Abstract: PIC18f4520 enc28j60 spi example codes PIC18f4431 PWM example codes PIC16f877a example code spi master configuration PIC16f876 example codes PIC18f4520 PWM example codes RF transmitter 433.92 3 pin 12v PIC16f877a example uart codes PIC16F84 example codes picdem 2 plus demo board pic18f4520 examples
    Text: 1st Half 2005 January - March 2005 Product Selector Guide Product Profile PICmicro Microcontrollers Microchip’s PICmicro® family of microcontrollers combine high performance, low cost and small package size to offer the best price/ performance ratio in the industry. Based on a powerful RISC core, the PICmicro architecture provides users an easy migration path


    Original     		PDF DS00148K1 PIC16f690 example codes PIC18f4520 enc28j60 spi example codes PIC18f4431 PWM example codes PIC16f877a example code spi master configuration PIC16f876 example codes PIC18f4520 PWM example codes RF transmitter 433.92 3 pin 12v PIC16f877a example uart codes PIC16F84 example codes picdem 2 plus demo board pic18f4520 examples

    MCP60421

    Abstract: mcp61421 PIC16F877 stepper motor interfacing PIC16F874A SD card Thermistor 20SP switch reluctance motor control using pic18F46K20 ENC28J60 mplab icd 3 mclr pgd pgc pic16f722 TC1426 rf transmitter and receiver for pic16f887
    Text: July - September 2006 2006 Product Selector Guide Product Profile 8-bit PIC Microcontrollers Microchip’s PIC® family of microcontrollers combine high-performance, low cost and small package size to offer the best price/ performance ratio in the industry. Based on a powerful RISC core, these 8-bit PIC®microcontrollers fall into three product architecture


    Original     		PDF 12-bit 14-bit PIC18) 16-bit DS00148L2 DS00148L2* MCP60421 mcp61421 PIC16F877 stepper motor interfacing PIC16F874A SD card Thermistor 20SP switch reluctance motor control using pic18F46K20 ENC28J60 mplab icd 3 mclr pgd pgc pic16f722 TC1426 rf transmitter and receiver for pic16f887

    Voltage-to-Frequency Interconnect

    Abstract: TC1030 MCP4822 23S17 buck 10a MCP215XDM MCP101 MCP1700 24V smart battery charger using pic push-pull converter microchip
    Text: Analog and Interface Product Solutions Stand-Alone Analog and Interface Solutions • Thermal Management • Battery Management • Power Management • Linear & Mixed-Signal • Interface Peripherals Are you looking for Complete Analog & Interface Design Solutions?


    Original     		PDF DS21060F DS21060F* Voltage-to-Frequency Interconnect TC1030 MCP4822 23S17 buck 10a MCP215XDM MCP101 MCP1700 24V smart battery charger using pic push-pull converter microchip

    ADM809RAR

    Abstract: AS7C256A hsbga 416 lcd cross reference IDT CYPRESS CROSS REFERENCE clocks DS1232* watch dog timer Product Selector Guide mbg* sot143 FS781 IDT74SSTV16857
    Text: DISCLAIMER Alliance Semiconductor Corporation reserves the right to make changes to its products or specifications at any time, without notice, in order to improve design or performance and to supply the best possible product. Alliance Semiconductor does not assume any responsibility for use of any circuitry described other than the circuitry embodied


    Original     		PDF IS61LV25616AL IS61LV5128AL IS61LV6416 IS61C6416 IS61LV1024 48-pin AS9C25256M2036L AS9C25512M2018L 512Kx18 ADM809RAR AS7C256A hsbga 416 lcd cross reference IDT CYPRESS CROSS REFERENCE clocks DS1232* watch dog timer Product Selector Guide mbg* sot143 FS781 IDT74SSTV16857

    TC1270A

    Abstract: tb-087 TC1270 TC1270AN TC1271 TC1271A TCM811 TCM812 F125 MARKING CODE TB087
    Text: TC1270A/70AN/71A Voltage Supervisor with Manual Reset Input Features: Package Types SOT-143 SOT-143 1 RST 2 TC1270A TC1270AN VSS 4 VDD VSS 1 3 MR 2 RST 2 MR 3 5 4 VDD 3 MR VSS RST NC 1 VDD 2 MR 3 TC1271A VDD TC1270A TC1270AN 1 4 SOT-23-5 SOT-23-5 NC TC1271A


    Original     		PDF TC1270A/70AN/71A OT-143 TC1270A TC1270AN TC1271A OT-23-5 TC1270A tb-087 TC1270 TC1270AN TC1271 TC1271A TCM811 TCM812 F125 MARKING CODE TB087

    pic*16f73 bootloader rf transceiver

    Abstract: TC9400 fsk 24cxx usb programmer 3 phase pwm pic16f877 mcp68 DC MOTOR SPEED position CONtrol pwm pic16F877 3 switch PIC16f877a based door security system 13.56Mhz class e power amplifier RFID phase pwm pic16f877 RFID pic16f73
    Text: PRODUCT LINE CARD INCLUDING DEVELOPMENT TOOLS SECOND QUARTER 2002 Product Profile PICmicro Microcontrollers Microchip’s PICmicro® family of microcontrollers combine high performance, low cost and small package size to offer the best price/performance ratio in the industry. Based on a powerful RISC core, the PICmicro architecture provides users an easy


    Original     		PDF DS00148G2 pic*16f73 bootloader rf transceiver TC9400 fsk 24cxx usb programmer 3 phase pwm pic16f877 mcp68 DC MOTOR SPEED position CONtrol pwm pic16F877 3 switch PIC16f877a based door security system 13.56Mhz class e power amplifier RFID phase pwm pic16f877 RFID pic16f73

    3 phase pwm pic16f877

    Abstract: 1X16 lcd module pic16f877a based spi sm 0038 ir receiver lcd 2*16 Side Brazed Ceramic Dual-In-Line Packages 28 One-chip telephone IC audio Amp. mosfet 1000 watt 400 Watt Audio amplifier IC control dc motor using Pic16F877A
    Text: PRODUCT LINE CARD INCLUDING DEVELOPMENT TOOLS 2ND HALF 2003 MOST CURRENT VERSION AVAILABLE ON WWW.MICROCHIP.COM WWW.MICROCHIP.COM Product Profile PICmicro Microcontrollers Microchip’s PICmicro® family of microcontrollers combine high performance, low cost and small package size to offer the best


    Original     		PDF DS00148H3 3 phase pwm pic16f877 1X16 lcd module pic16f877a based spi sm 0038 ir receiver lcd 2*16 Side Brazed Ceramic Dual-In-Line Packages 28 One-chip telephone IC audio Amp. mosfet 1000 watt 400 Watt Audio amplifier IC control dc motor using Pic16F877A

    c2nn

    Abstract: F125 SOT23 C4NN TC1271A TC1270 TC1270A TC1271 TCM811 TCM812 c3nn
    Text: TC1270A/71A 带手动复位输入的电压监视器 封装类型 SOT-143 SOT-143 1 RST 2 4 VDD VSS 1 3 MR 2 RST 2 MR 3 5 4 VDD 3 MR VSS RST NC 1 VDD 2 MR 3 TC1271A VDD TC1270A 1 4 SOT-23-5 SOT-23-5 NC TC1271A VSS TC1270A • 高精度电压监视器 - 2.63V 2.93V、 3.08V、 4.38V 和 4.63V 监


    Original     		PDF TC1270A/71A OT-143 TC1271A TC1270A OT-23-5 TC1270 c2nn F125 SOT23 C4NN TC1271A TC1270 TC1270A TC1271 TCM811 TCM812 c3nn

    IR RC5 encoder PIC

    Abstract: PIC18F45K20 demo board PIC16F877A Microcontroller architecture 15x10-bit PIC16F877A for sensor DM183022 48v battery charger lead pic16f877a based spi PIC18F96J60 PICmicro Reference Manual
    Text: October - December 2005 Update 2005 Product Selector Guide Product Profile 8-bit PICmicro Microcontrollers Microchip’s PICmicro® family of microcontrollers combine high performance, low cost and small package size to offer the best price/ performance ratio in the industry. Based on a powerful RISC core, these 8-bit PIC® microcontrollers fall into three product architecture


    Original     		PDF 12-bit 14-bit 896-14K PIC18) DS00148K4 IR RC5 encoder PIC PIC18F45K20 demo board PIC16F877A Microcontroller architecture 15x10-bit PIC16F877A for sensor DM183022 48v battery charger lead pic16f877a based spi PIC18F96J60 PICmicro Reference Manual

    MPC73832

    Abstract: mcp60021 switch reluctance motor control using pic18F46K20 PIC18FXXKXX mcp61421 MCP3909 LCD AC162 DM164120-3 PIC16f877a c code for ethernet module enc28j60 PIC16F874A SD card
    Text: January - June 2007 2007 Product Selector Guide Product Profile 8-bit PIC Microcontrollers Microchip’s 8-bit PIC® microcontrollers combine high-performance, low cost and small package size to offer the best price/ performance ratio in the industry. Based on a powerful RISC core, these 8-bit PIC®microcontrollers fall into three product architecture


    Original     		PDF 12-bit 14-bit PIC18) 16-bit DS00148M DS00148L2* MPC73832 mcp60021 switch reluctance motor control using pic18F46K20 PIC18FXXKXX mcp61421 MCP3909 LCD AC162 DM164120-3 PIC16f877a c code for ethernet module enc28j60 PIC16F874A SD card

    STM706DS6E

    Abstract: MAX818LCSA ADM6320CY31ARJ-RL7 IMP706RESA MCP809T-300I ADM6316CY26ARJ-RL7 ADM6318CY29ARJ semiconductor cross reference IMP706TESA STM6824SWY6F
    Text: Reset & supervisors Cross reference guide April 2005 www.st.com/reset www.st.com/supervisor Microprocessor supervisors with switchover Industry Standard Reference MAX690ACSA MAX690AESA MAX690RCSA MAX690RESA MAX690SCSA MAX690SESA MAX690TCSA MAX690TESA MAX692ACSA


    Original     		PDF MAX690ACSA MAX690AESA MAX690RCSA MAX690RESA MAX690SCSA MAX690SESA MAX690TCSA MAX690TESA MAX692ACSA MAX692AESA STM706DS6E MAX818LCSA ADM6320CY31ARJ-RL7 IMP706RESA MCP809T-300I ADM6316CY26ARJ-RL7 ADM6318CY29ARJ semiconductor cross reference IMP706TESA STM6824SWY6F

    PIC16F72 inverter ups

    Abstract: UPS inverter PIC16F72 PIC16F676 inverter hex code 16F877 with sd-card and lcd project circuit diagram wireless spy camera NH82801GB xmega-a4 online ups service manual back-ups ES 500 ARM LPC2148 INTERFACING WITH RFID circuit diagram realtek rtd 1186
    Text: the solutions are out there you just haven’t registered yet. RoadTest the newest products in the market! View the latest news, design support and hot new technologies for a range of applications Join the RoadTest group and be in with a chance to trial exclusive new products for free. Plus, read


    Original     		PDF element-14 element14. element14, PIC16F72 inverter ups UPS inverter PIC16F72 PIC16F676 inverter hex code 16F877 with sd-card and lcd project circuit diagram wireless spy camera NH82801GB xmega-a4 online ups service manual back-ups ES 500 ARM LPC2148 INTERFACING WITH RFID circuit diagram realtek rtd 1186

    PIC16F618

    Abstract: ic pic16f618 led pwm Controlled with Pic16F84 motor control using PIC16f887 LCD AC162 PIC16F877 Data Logger pic16f72 3 PHASE MOTOR CONTROL PIC16f84a to PIC18f PIC18F6522 control dc motor speed using pwm Pic16F877A
    Text: January - March 2006 2006 Product Selector Guide Product Profile 8-bit PIC Microcontrollers Microchip’s PIC® family of microcontrollers combine high performance, low cost and small package size to offer the best price/ performance ratio in the industry. Based on a powerful RISC core, these 8-bit PIC® microcontrollers fall into three product architecture


    Original     		PDF 12-bit 14-bit 896-14K PIC18) 16-bit DS00148L1 PIC16F618 ic pic16f618 led pwm Controlled with Pic16F84 motor control using PIC16f887 LCD AC162 PIC16F877 Data Logger pic16f72 3 PHASE MOTOR CONTROL PIC16f84a to PIC18f PIC18F6522 control dc motor speed using pwm Pic16F877A

    23s17

    Abstract: pt100 pic MCP215XDM buck 10a MCP3550 TC1054 TC1070 TC1219 TC1223 MCP23017
    Text: M ic r o c h ip } S J t e : « l I i f : » t t t i s f f l i s ê i i - m kw b« Microchip •m ■^ m M icrochip M 3i i E S * t b P I ^ i S f f l S n° n ^ rt m s « s « $ ¡« 3 1 ' m S fr ttlt jjiw n ' m & w s ' » £ « « ' « ttJ K ^ n * « 3RM 3[E-SaE


    OCR Scan     		PDF I1989 DS21060J 23s17 pt100 pic MCP215XDM buck 10a MCP3550 TC1054 TC1070 TC1219 TC1223 MCP23017