Call us: +86 0755-82563503

Currency: $ US Dollar

Items : %s%s

Microcontrollers

Compare Image Name Manufacturer Pricing(USD) Quantity Weight(Kg) Size(LxWxH) Datasheet Factory Lead Time Mount Packaging Published Series Pbfree Code Part Status Moisture Sensitivity Level (MSL) Number of Terminations Max Operating Temperature Min Operating Temperature Operating Supply Voltage Length RoHS Status Lead Free Radiation Hardening Number of Pins Additional Feature Package / Case Interface Max Supply Voltage REACH SVHC Reach Compliance Code Min Supply Voltage Frequency Width Mounting Type Operating Temperature Technology Height Seated (Max) HTS Code Max Frequency JESD-609 Code Terminal Finish Terminal Position Terminal Form Peak Reflow Temperature (Cel) Supply Voltage Time@Peak Reflow Temperature-Max (s) Base Part Number Pin Count Surface Mount Terminal Pitch JESD-30 Code Supply Voltage-Min (Vsup) Subcategory Qualification Status Power Supplies Supply Voltage-Max (Vsup) Max Power Dissipation Watchdog Timer Supplier Device Package Speed Oscillator Type Access Time Memory Size Memory Type Core Processor RAM Size Number of I/O Address Bus Width Number of UART Channels Supply Current-Max External Data Bus Width Data Bus Width Number of Programmable I/O Number of Timers/Counters uPs/uCs/Peripheral ICs Type Peripherals Clock Frequency Bit Size Has ADC DMA Channels PWM Channels DAC Channels Voltage - Supply (Vcc/Vdd) ROM (words) RAM (bytes) Number of ADC Channels On Chip Program ROM Width CPU Family EEPROM Size Program Memory Type Connectivity Core Size Program Memory Size Data Converter
R5F100GKAFB#X0 R5F100GKAFB#X0 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tape & Reel (TR) RL78/G13 yes Obsolete 3 (168 Hours) 48 7mm ROHS3 Compliant IT ALSO OPERATES AT 4MHZ @1.6V MIN SUPPLY @ LOW-VOLTAGE MAIN MODE 48-LQFP 7mm Surface Mount -40°C~85°C TA CMOS 1.6mm 8542.31.00.01 QUAD GULL WING NOT SPECIFIED 3V NOT SPECIFIED 48 YES 0.5mm S-PQFP-G48 2.7V 5.5V 32MHz Internal RL78 24K x 8 34 MICROCONTROLLER DMA, LVD, POR, PWM, WDT 20MHz 16 YES YES YES NO 1.6V~5.5V 393216 24576 8 8K x 8 FLASH CSI, I2C, LINbus, UART/USART 16-Bit 384KB 384K x 8 A/D 10x8/10b
DF36054GHV DF36054GHV Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 20 Weeks Surface Mount Tray 2006 H8® H8/300H Tiny yes Obsolete 3 (168 Hours) 64 ROHS3 Compliant Lead Free No 64 64-BQFP CAN, SCI 20MHz Surface Mount -20°C~75°C TA CMOS QUAD GULL WING DF36054 64 0.8mm Microcontrollers 3.3/5V Internal 20 μs 32kB H8/300H 2K x 8 45 35mA 16b 53 2 LVD, POR, PWM, WDT 16 3V~5.5V FLASH CANbus, SCI, SSU 16-Bit 32KB 32K x 8 A/D 8x10b
M30260F3AGP#U7A M30260F3AGP#U7A Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 20 Weeks Surface Mount Tray 2006 M16C™ M16C/Tiny/26A yes Active 3 (168 Hours) 48 7mm ROHS3 Compliant Lead Free No 48 ALSO OPERATES AT 2.7V MINIMUM SUPPLY @ 10 MHZ 48-LQFP I2C, UART, USART 20MHz Surface Mount -40°C~85°C TA CMOS 1.7mm e1 Tin/Silver/Copper (Sn/Ag/Cu) QUAD GULL WING 5V M30260 48 0.5mm 3V 5.5V Yes Internal 20 μs 24kB M16C/60 1K x 8 39 16b 8 MICROCONTROLLER DMA, PWM, Voltage Detect, WDT 16 YES YES YES NO 2.7V~5.5V 8 FLASH I2C, IEBus, SIO, UART/USART 16-Bit 24KB 24K x 8 A/D 12x10b
R5F101GCDFB#50 R5F101GCDFB#50 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tape & Reel (TR) RL78/G13 Active 3 (168 Hours) ROHS3 Compliant 48-LQFP Surface Mount -40°C~85°C TA R5F101 32MHz Internal RL78 2K x 8 34 DMA, LVD, POR, PWM, WDT 1.6V~5.5V FLASH CSI, I2C, LINbus, UART/USART 16-Bit 32KB 32K x 8 A/D 10x8/10b
R5F564MFGDLC#21 R5F564MFGDLC#21 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 20 Weeks Tray 2016 RX600 yes Active 3 (168 Hours) 177 7mm ROHS3 Compliant 177 177-TFLGA CAN, EBI/EMI, Ethernet, I2C, LIN, MMC, SCI, SD, SPI, UART, USART, USB 120MHz 7mm Surface Mount -40°C~85°C TA CMOS BOTTOM NO LEAD 3.3V 177 YES 0.5mm 2.7V Microcontrollers Not Qualified 3/3.3V 3.6V Internal 2MB RXv2 552K x 8 127 24 110mA 32 MICROCONTROLLER, RISC DMA, LVD, POR, PWM, WDT 32 YES YES YES 2.7V~3.6V 2097152 524288 RX 64K x 8 FLASH CANbus, EBI/EMI, Ethernet, I2C, LINbus, MMC/SD, SCI, SPI, SSI, UART/USART, USB 32-Bit 2MB 2M x 8 A/D 29x12b; D/A 2x12b
R5F100GJDFB#30 R5F100GJDFB#30 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tray RL78/G13 Active 3 (168 Hours) ROHS3 Compliant 48-LQFP Surface Mount -40°C~85°C TA R5F100 32MHz Internal RL78 20K x 8 34 DMA, LVD, POR, PWM, WDT 1.6V~5.5V 8K x 8 FLASH CSI, I2C, LINbus, UART/USART 16-Bit 256KB 256K x 8 A/D 10x8/10b
HD64F3694GFYV HD64F3694GFYV Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 24 Weeks Surface Mount Tray 2005 H8® H8/300H Tiny yes Obsolete 3 (168 Hours) 48 7mm ROHS3 Compliant Lead Free No 48 48-LQFP I2C, SCI 20MHz 7mm Surface Mount -20°C~75°C TA CMOS 1.7mm e6 Tin/Bismuth (Sn/Bi) QUAD GULL WING 260 5V 20 HD64*3694 48 0.5mm 4V Microcontrollers 5.5V Yes Internal 20 μs 32kB H8/300H 2K x 8 29 3 MICROCONTROLLER LVD, POR, PWM, WDT 16 YES NO YES NO 3V~5.5V FLASH I2C, SCI 16-Bit 32KB 32K x 8 A/D 8x10b
R5F5630ADDLC#U0 R5F5630ADDLC#U0 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 20 Weeks Tray 2014 RX600 yes Active 3 (168 Hours) 177 3.3V 8mm ROHS3 Compliant No 177 177-TFLGA CAN, EBI/EMI, I2C, LIN, SCI, SPI, UART, USB 100MHz Surface Mount -40°C~85°C TA CMOS 1.05mm 8542.31.00.01 BOTTOM BALL 3.3V 177 YES 0.5mm 3.6V Yes Internal 768kB RX 96K x 8 148 24 32b 149 26 MICROCONTROLLER DMA, LVD, POR, PWM, WDT 32 YES YES YES YES 2.7V~3.6V 32K x 8 FLASH CANbus, EBI/EMI, I2C, LINbus, SCI, SPI, USB 32-Bit 768KB 768K x 8 A/D 8x10b, 21x12b; D/A 2x10b
R5F521A8BDFN#30 R5F521A8BDFN#30 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 20 Weeks Tray RX200 yes Active 3 (168 Hours) 80 3.3V 12mm ROHS3 Compliant 80 80-LQFP I2C, IrDA, SCI, SPI, UART 50MHz Surface Mount -40°C~85°C TA CMOS QUAD GULL WING 3.3V 80 YES 0.5mm Microcontrollers Not Qualified 3.6V Yes Internal 512kB RX 64K x 8 51 59mA 32b 14 MICROCONTROLLER DMA, LVD, POR, PWM, WDT 32 YES YES YES 1.8V~3.6V 524288 65536 RX 8K x 8 FLASH I2C, IrDA, SCI, SPI 32-Bit 512KB 512K x 8 A/D 4x24b, 7x10b; D/A 2x10b
R5F101LCDFB#50 R5F101LCDFB#50 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tape & Reel (TR) RL78/G13 Active 3 (168 Hours) ROHS3 Compliant 64-LQFP Surface Mount -40°C~85°C TA R5F101 32MHz Internal RL78 2K x 8 48 DMA, LVD, POR, PWM, WDT 1.6V~5.5V FLASH CSI, I2C, LINbus, UART/USART 16-Bit 32KB 32K x 8 A/D 12x8/10b
M30302GAPFP#U3 M30302GAPFP#U3 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download M16C™ M16C/30 yes Obsolete 3 (168 Hours) RoHS Compliant 100-BQFP compliant Surface Mount -40°C~85°C TA CMOS NOT SPECIFIED NOT SPECIFIED 100 16MHz Internal M16C/60 5K x 8 87 MICROCONTROLLER DMA, POR, PWM, WDT 2.7V~5.5V FLASH I2C, IEBus, UART/USART 16-Bit 96KB 96K x 8 A/D 18x10b
R5F100LHAFA#30 R5F100LHAFA#30 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 20 Weeks Tray RL78/G13 yes Active 3 (168 Hours) ROHS3 Compliant 64-LQFP Surface Mount -40°C~85°C TA 64 32MHz Internal RL78 16K x 8 48 MICROCONTROLLER DMA, LVD, POR, PWM, WDT 1.6V~5.5V 8K x 8 FLASH CSI, I2C, LINbus, UART/USART 16-Bit 192KB 192K x 8 A/D 12x8/10b
D33687FZJV D33687FZJV Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 Obsolete Vendor Undefined ROHS3 Compliant
M30853FJFP#U3 M30853FJFP#U3 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 20 Weeks Surface Mount Tray 2005 M16C™ M32C/80/85 Active 3 (168 Hours) 85°C -40°C 5V ROHS3 Compliant Lead Free No 100 100-BQFP CAN, I2C, UART, USART 5.5V 4.2V 32MHz Surface Mount -40°C~85°C TA 32MHz M30853 500mW 100-QFP (14x20) 32MHz Internal 32 μs 512kB FLASH M32C/80 24K x 8 85 16b 87 11 DMA, WDT 3V~5.5V FLASH CANbus, I2C, IEBus, SIO, UART/USART 16/32-Bit 512KB 512K x 8 A/D 26x10b; D/A 2x8b
UPD703235GC(A)-L39-8EA-A UPD703235GC(A)-L39-8EA-A Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 Tape & Reel (TR) V850ES/Fx2 Obsolete 3 (168 Hours) 100-LQFP Surface Mount -40°C~85°C TA 20MHz Internal V850ES 12K x 8 84 WDT 3.5V~5.5V Mask ROM CANbus, CSI, UART/USART 32-Bit 256KB 256K x 8 A/D 16x10b
V-SSA-IKAN-DAMMY-0068 V-SSA-IKAN-DAMMY-0068 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 Obsolete 3 (168 Hours) ROHS3 Compliant
HAT2160HWS-E HAT2160HWS-E Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 Obsolete 1 (Unlimited) ROHS3 Compliant
R5F100LEGFB#V0 R5F100LEGFB#V0 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tray 2012 RL78/G13 yes Obsolete 3 (168 Hours) 64 10mm ROHS3 Compliant 64 IT ALSO OPERATES AT 16MHZ @2.4V MIN SUPPLY 64-LQFP 10mm Surface Mount -40°C~105°C TA CMOS 1.6mm 8542.31.00.01 QUAD GULL WING NOT SPECIFIED 3V NOT SPECIFIED R5F100 64 YES 0.5mm 2.7V 5.5V 32MHz Internal RL78 4K x 8 48 MICROCONTROLLER DMA, LVD, POR, PWM, WDT 20MHz 16 YES YES YES NO 2.4V~5.5V 65536 8 4K x 8 FLASH CSI, I2C, LINbus, UART/USART 16-Bit 64KB 64K x 8 A/D 12x8/10b
R5F100GGGFB#50 R5F100GGGFB#50 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 20 Weeks Tape & Reel (TR) RL78/G13 yes Active 3 (168 Hours) 128 20mm ROHS3 Compliant 48-LQFP 14mm Surface Mount -40°C~105°C TA QUAD GULL WING 3V 48 YES 0.5mm 2.7V 5.5V 32MHz Internal RL78 12K x 8 34 MICROCONTROLLER DMA, LVD, POR, PWM, WDT 20MHz 16 YES YES YES 2.4V~5.5V 8K x 8 FLASH CSI, I2C, LINbus, UART/USART 16-Bit 128KB 128K x 8 A/D 10x8/10b
R5F213G2DDSP#U0 R5F213G2DDSP#U0 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 24 Weeks Surface Mount Tube 2010 R8C/3x/3GD yes Active 1 (Unlimited) 24 7.8mm ROHS3 Compliant No 24 IT ALSO OPERATES IN 1.8V AT 5MHZ 24-LSSOP (0.220, 5.60mm Width) I2C, UART, USART 20MHz Surface Mount -40°C~85°C TA CMOS DUAL GULL WING 3.3V R5F213G2 24 0.65mm 2.7V Microcontrollers 2/5V 5.5V 500mW Yes Internal 8kB R8C 1K x 8 19 15mA 16b 4 MICROCONTROLLER POR, PWM, Voltage Detect, WDT 16 YES NO YES NO 1.8V~5.5V R8C FLASH I2C, UART/USART 16-Bit 8KB 8K x 8 A/D 8x10b
R5F21164DSP#U0 R5F21164DSP#U0 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 24 Weeks Surface Mount Tube 2006 R8C/1x/16 Obsolete 3 (168 Hours) ROHS3 Compliant Lead Free No 20 20-LSSOP (0.173, 4.40mm Width) I2C, UART, USART 20MHz Surface Mount -40°C~85°C TA R5F21164 20 300mW Yes Internal 20 μs 16kB R8C 1K x 8 13 16b 3 LED, POR, Voltage Detect, WDT 2.7V~5.5V FLASH I2C, SIO, UART/USART 16-Bit 16KB 16K x 8 A/D 4x10b
R5F571MGCDLC#20 R5F571MGCDLC#20 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 20 Weeks Tray 2015 RX71M yes Active 3 (168 Hours) ROHS3 Compliant 177-TFLGA Surface Mount -40°C~85°C TA 177 240MHz Internal RXv2 512K x 8 127 MICROCONTROLLER DMA, LVD, POR, PWM, WDT 2.7V~3.6V 64K x 8 FLASH CANbus, EBI/EMI, Ethernet, I2C, MMC/SD, QSPI, SCI, SPI, SSI, USB OTG 32-Bit 2.5MB 2.5M x 8 A/D 8x12b, 21x12b; D/A 2x12
R5F5631NDDFL#V0 R5F5631NDDFL#V0 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 20 Weeks Tray 2014 RX600 yes Active 3 (168 Hours) 48 7mm ROHS3 Compliant No 48 48-LQFP CAN, I2C, LIN, SCI, SPI, UART, USB 100MHz Surface Mount -40°C~85°C TA QUAD GULL WING 3V 48 YES 0.5mm 2.7V 3.6V Yes Internal 384kB RX 64K x 8 30 24 32b 26 MICROCONTROLLER DMA, LVD, POR, PWM, WDT 32 YES YES YES 2.7V~3.6V 32K x 8 FLASH CANbus, I2C, LINbus, SCI, SPI, USB 32-Bit 384KB 384K x 8 A/D 8x12b
R5F102A8ASP#X0 R5F102A8ASP#X0 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 24 Weeks Tape & Reel (TR) 2013 RL78/G12 yes Obsolete 3 (168 Hours) 30 9.85mm ROHS3 Compliant Lead Free No 30 30-LSSOP (0.240, 6.10mm Width) I2C, UART, USART 24MHz Surface Mount -40°C~85°C TA CMOS DUAL GULL WING 3V R5F102A 30 YES 0.65mm 2.7V Microcontrollers 2/5V 5.5V Yes Internal 8kB RL78 768 x 8 23 3 5.5mA 16b 26 12 MICROCONTROLLER DMA, LVD, POR, PWM, WDT 16 YES YES YES 1.8V~5.5V 8192 2K x 8 FLASH CSI, I2C, UART/USART 16-Bit 8KB 8K x 8 A/D 8x8/10b
R5F21164SP#U0 R5F21164SP#U0 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 20 Weeks Surface Mount Tube 2006 R8C/1x/16 Active 3 (168 Hours) ROHS3 Compliant Lead Free No 20 20-LSSOP (0.173, 4.40mm Width) I2C, UART, USART 20MHz Surface Mount -20°C~85°C TA R5F21164 20 300mW Yes Internal 20 μs 16kB R8C 1K x 8 13 16b 3 LED, POR, Voltage Detect, WDT 2.7V~5.5V FLASH I2C, SIO, UART/USART 16-Bit 16KB 16K x 8 A/D 4x10b
R5F21181SP#U0 R5F21181SP#U0 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 20 Weeks Surface Mount Tube 2003 R8C/1x/18 yes Active 3 (168 Hours) 20 6.5mm ROHS3 Compliant Lead Free No 20 20-LSSOP (0.173, 4.40mm Width) UART, USART 20MHz Surface Mount -20°C~85°C TA CMOS 1.45mm DUAL GULL WING 3.3V R5F21181 20 0.65mm 3V 5.5V 300mW Yes Internal 20 μs 4kB R8C 384 x 8 13 16b 3 MICROCONTROLLER LED, POR, Voltage Detect, WDT 16 NO NO NO NO 2.7V~5.5V FLASH SIO, UART/USART 16-Bit 4KB 4K x 8
R5F100LEABG#V0 R5F100LEABG#V0 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 24 Weeks Tray 2011 RL78/G13 Obsolete 3 (168 Hours) 5.5V ROHS3 Compliant Lead Free 64 64-VFBGA I2C, LIN, UART, USART 32MHz Surface Mount -40°C~85°C TA R5F100 Yes Internal 64kB RL78 4K x 8 48 2 DMA, LVD, POR, PWM, WDT 1.6V~5.5V 4K x 8 FLASH CSI, I2C, LINbus, UART/USART 16-Bit 64KB 64K x 8 A/D 12x8/10b
R5F21386CDFP#30 R5F21386CDFP#30 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tray 2010 R8C/3x/38C yes Active 3 (168 Hours) 80 12mm ROHS3 Compliant 80-LQFP 12mm Surface Mount -40°C~85°C TA QUAD GULL WING 3.3V R5F21386 80 YES 0.5mm 2.7V 5.5V 20MHz Internal R8C 2.5K x 8 75 MICROCONTROLLER POR, PWM, Voltage Detect, WDT 20MHz 8 YES NO YES 1.8V~5.5V 4K x 8 FLASH I2C, LINbus, SIO, SSU, UART/USART 16-Bit 32KB 32K x 8 A/D 20x10b; D/A 2x8b
R5F101LEDFB#X0 R5F101LEDFB#X0 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tape & Reel (TR) RL78/G13 yes Last Time Buy 3 (168 Hours) 64 10mm ROHS3 Compliant IT ALSO OPERATES AT 4MHZ @1.6V MIN SUPPLY @ LOW-VOLTAGE MAIN MODE 64-LQFP 10mm Surface Mount -40°C~85°C TA CMOS 1.6mm QUAD GULL WING NOT SPECIFIED 3V NOT SPECIFIED R5F101 64 YES 0.5mm S-PQFP-G64 2.7V 5.5V 32MHz Internal RL78 4K x 8 48 MICROCONTROLLER DMA, LVD, POR, PWM, WDT 20MHz 16 YES YES YES NO 1.6V~5.5V 65536 8 FLASH CSI, I2C, LINbus, UART/USART 16-Bit 64KB 64K x 8 A/D 12x8/10b
R5F3640DDFA#U0 R5F3640DDFA#U0 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 Surface Mount Tray 2009 yes Obsolete 3 (168 Hours) 100 85°C -40°C 20mm ROHS3 Compliant Lead Free No 100 PQFP I2C, UART 5.5V No SVHC 2.7V 25MHz QUAD GULL WING 5V 100 0.65mm 256kB FLASH 16kB 85 20 16b 11 MICROCONTROLLER DMA, PWM 32 YES YES YES 26
Settings Need Help?
Top FAQ's

How can I quickly find answers to my questions?

Please visit the Help & Support area of our website to find information regarding ordering, shipping, delivery and more.

What is my Order Status?

Registered users can track orders from their account dropdown, or click here. *Order Status may take 12 hours to update after initial order is placed.

How do I return product?

Users can begin the returns process by starting with our Returns Page.

How do I find price and availability?

Quotes can be created by registered users in myLists.

How do I create a 'HK JDW' Account?

Visit the Registration Page and enter the required information. You will receive an email confirmation when your registration is complete.

United Kingdom/GBP Summary
Fast Shipping Fast Delivery

Orders are typically delivered to United Kingdom within 48 hours depending on location.

Free Shipping Free Shipping

Free delivery to United Kingdom on orders of £33 or more. A delivery charge of £12 will be billed on all orders less than £33.

Incoterms Incoterms

DDP (Duty and customs paid by HK JDW)

Payment Options Payment Types

Credit account for qualified institutions and businesses

Payment in Advance by Wire Transfer

Visa Mastercard American Express PayPal Apple Pay Google Pay

Marketplace Marketplace Product

More Products From Fully Authorized Partners

Average Time to Ship 1-3 Days, extra ship charges may apply. Please see product page, cart, and checkout for actual ship speed.

Incoterms: CPT (Duty, customs, and applicable VAT/Tax due at time of delivery)

For more information visit Help & Support