- There are no more items in your cart
- Shipping
- Total £0.00
- Motors
- Business, Office & Industrial
- Sports, Hobbies & Leisure
- Electronic components
- Passives
- Light sources
- Mechanical
- Worm Gear Clamps and Fixing Clamps
- Vibration Dampers
- Bearings
- Technical seals
- Plastic Spacers
- PCB Brackets and Guides
- Rivets
- Feet and Wheels
- Knobs
- Profiles and Holders
- Profiles for LED
- Safety Elements
- Screws
- Bolts
- Joints
- Hinges
- Locks and Clasps
- Nuts
- Fittings for ropes
- Handwheels and pointers
- Accessories for Hydraulic Systems
- Engineering materials
- Mechanical Power Transmission
- Shoulder Screws
- Sliding and Transport Systems
- Support insulators
- Clamping Levers
- Metal Spacers
- Threaded Insertions
- Washers
- Caps Plugs and Masking
- Car Fasteners
- Robotics and Prototyping
- Enclosures
- Enclosures - Accessories
- Multipurpose Enclosures
- Din Rail Mounting Enclosures/Accessories
- Enclosures with Panel
- Modular Aparatus Enclosures
- Desktop Enclosures
- Shielded enclosures
- Junction boxes
- Remote Control Enclosures
- Enclosures for Devices with Display
- Panel Mounting Enclosures
- Wall Mounting Enclosures
- Enclosures for Alarms and Sensors
- Enclosures for Potting
- Power Supplies Enclosures
- 19inch Enclosures
- Racks & Cabinets
- Enclosures, Boxes & Cases
- Standard Electrical
- Enclosures for Industrial Automation
- Storage Boxes & Cases
- Enclosures for Single Board Computing
- Fuses and Circuit Breakers
- Office Equipment
- Fans
- Automation
- Regulation and Control
- Sensors and Transducers
- Magnets
- Measuring Conv. and Signal Isolators
- Inductive Sensors
- Ultrasonic Sensors
- Magnetic Sensors
- Photoelectric Sensors
- Sensors - Cables
- Temperature Sensors and Transducers
- Fiber-Optic Sensors
- Thermostats
- Humidity Sensors
- Gas Sensors
- Pressure Sensors and Transducers
- Capacitive Sensors
- Encoders
- Level Sensors
- Flow Meters
- Tilt Sensors
- Electric Motors
- Embedded and IoT systems
- Computer Accessories
- Switches and Indicators
- Optoelectronics
- Transformers and Ferrite Cores
- Power Sources
- Sound Sources
- Workplace Equipment
- Antistatic Protection
- Tools
- Wrenches
- Screwdrivers
- Pliers
- Crimping Tools
- General Purpose Tools
- Glue Guns
- Threading Dies and Taps
- Drills
- Screwdriver Bits
- Handles
- Screwdriver Bits Sets
- Power Tools & Accessories
- Measuring Tools
- Inspection Tools
- Tweezers
- Strippers for wire & cable
- Repair and Construction Tools
- Industrial and Workshop Lighting
- Abrasive materials
- Tool Sets
- Pneumatic Tools and Accessories
- Garden Tools
- Tools and Acc. for Working at Height
- Storage
- Measuring Accessories
- Chemical products
- Soldering and Welding Equipment
- Measuring Instruments
- Health and Safety
- PCB prototyping & production
- Cleanroom
- Wires and Cables
- Relays and Contactors
- Car Audio
- Pneumatics and Hydraulics
- Semiconductors
- Integrated circuits
- Programmers and erasers
- Semiconductors - accessories
- Discrete semiconductors modules
- Transistors
- Triacs
- Diodes
- Development kits
- Bridge rectifiers
- Thyristors
- Diacs
- Discrete Semiconductors
- Power Management ICs
- Communication & Wireless Module ICs
- Interface ICs
- Sensor ICs
- Data Converters
- Amplifiers & Comparators
- Clock, Timing & Frequency ICs
- Audio & Video ICs
- Chip Programmers & Debuggers
- Processors & Microcontrollers
- Logic ICs
- Memory Chips
- Programmable Logic ICs
- Integrated Circuits - ICs
- Embedded Processors & Controllers
- Memory ICs
- Switch ICs
- Logic ICs
- Optocouplers
- Equalisers
- Interface ICs
- Multimedia ICs
- Security ICs
- Programmable Logic ICs
- Active Filter
- Amplifier ICs
- Data Converter ICs
- Audio ICs
- Clock & Timer ICs
- Communication & Networking ICs
- Counter ICs
- Digital Potentiometer ICs
- Driver ICs
- Power Management ICs
- Wireless & RF Integrated Circuits
- Wireless & RF Semiconductors
- Memory ICs
- Engineering Development Tools
- Connectors
- Push-on connectors and cable terminals
- Signal connectors
- Power connectors
- LED connectors
- Terminal blocks
- DC power connectors
- AC supply connectors
- Rail mounted connectors
- Solar connectors
- Heavy Duty Power Connector Contacts
- Heavy Duty Power Connector Accessories
- Heavy Duty Power Connector Housings & Hoods
- Heavy Duty Power Connector Inserts & Modules
- Lighting Connectors
- Compact Power Connectors
- Heavy Duty Power Connectors
- Compact Power Connector Accessories
- DIN 43650 Solenoid Connectors
- Lighting Connector Accessories
- Power to the Board
- AC Power Plugs & Receptacles
- Jones Plugs & Sockets
- AC Power Entry Modules
- Audio-video connectors
- Automotive connectors
- Data connectors
- Industrial connectors
- RF Coaxial connectors
- Other connectors
- Other connectors TE
- Other connectors Molex
- Other Neutrik Connectors
- Other Hirose Connectors
- Other Amphenol Connectors
- Other Binder Connectors
- Military connectors
- Other connectors Harting
- Wire Terminals & Splices
- Network & Telecom Connectors
- Terminal Blocks
- AV Connectors
- Circular Connectors
- Industrial Circular Connectors
- Mil Spec Circular Connectors
- DIN Connectors
- Circular Connector Dust Caps
- Circular Connector Contacts
- Circular Connector Accessories
- Circular Connector Adapters
- Circular Connector Inserts
- Circular Connector Seals
- Circular Connector Backshells
- Standard Circular Connectors
- Circular Metric Connectors
- Circular DIN Connectors
- Circular MIL Spec Connectors
- Circular Push Pull Connectors
- PCB Connectors & Wire Housings
- Mains & DC Power Connectors
- RF Coaxial Connectors & Adapters
- Automotive Electrical Connectors
- USB, D Sub & Computing Connectors
- Backplane & Rack Connectors
- IC Sockets & Adapters
- Memory Connectors
- Lighting Connectors
- Headers & Wire Housings
- FFC
- Board to Board & Mezzanine Connectors
- Audio & Video Connectors
- Contact Probes
- IC & Component Sockets
- Cable Assemblies
- Card Edge Connectors
- I
- Backplane Connectors
- D-Sub Connectors
- Fibre Optic Connectors
- Pin & Socket Connectors
- Modular Connectors
- Terminals
- Wire & Cable
- MIL-Spec
- Solar Connectors
- RF Interconnects
- Junction Systems
- USB Connectors
- IEEE 1394 Connectors
- Automation & Control Gear
- Automation Signalling
- Sensors
- Motion Control Sensors
- Photoelectric Sensors
- Sensor Accessories
- Sensor Connectivity
- Infrared Temperature Sensors
- Strain Gauges
- Light Curtains
- Thermocouple & Extension Wire
- Proximity Sensors
- Flow Controllers
- RTD Sensors
- Identification Sensors
- Light Detection and Ranging
- Registration Sensors
- Fibre Optic Sensors
- Level Sensors
- Pressure Sensors
- Thermocouples
- Float Switches
- Multi Function Sensors
- Flow Sensors
- Temperature Sensitive Labels
- Thermistors
- Vibration Sensors
- Hall Effect Sensors
- Process Control
- Electric Motors
- PLCs, HMIs & Industrial Computing
- Contactors & Auxiliary Contacts
- Solenoids
- Relays & Signal Conditioning
- Cables & Wires
- Pneumatics & Hydraulics
- Pneumatic Connectors, Fittings & Hose
- Pneumatic Valves
- Pneumatic Air Preparation
- Pneumatic Sensors & Switches
- Pneumatic & Hydraulic Pressure Gauges
- Vacuum Components
- Hydraulic Fittings & Tubing
- Pneumatic Cylinders & Actuators
- Pneumatic Counters, Logic Controllers & Timers
- Hydraulic Instrumentation & Switches
- Hydraulic Fluids & Filtration
- Compressed Air Piping Systems
- Hydraulic Cylinders, Pumps & Power Units
- Hydraulic Valves & Manifolds
- Fasteners & Fixings
- Hand Tools
- Sensors
- Temperature Sensors
- Sensor Fixings & Accessories
- Encoders
- Optical Sensors
- Audio Sensors
- Magnetic Sensors
- Proximity Sensors
- Sensor Development Tools
- Magnetic Sensor Development Tools
- Multiple Function Sensor Development Tools
- Optical Sensor Development Tools
- Touch Sensor Development Tools
- Position Sensor Development Tools
- Acceleration Sensor Development Tools
- Temperature Sensor Development Tools
- Pressure Sensor Development Tools
- Current Sensor Development Tools
- Environmental Sensors
- Capacitive Touch Sensors
- Motion & Position Sensors
- Current Sensors
- Biometric Sensors
- Pressure Sensors
- Force Sensors & Load Cells
- Computing & Peripherals
- Lighting
- Site Safety
- ESD Control, Cleanroom & PCB Prototyping
- Power Supplies & Transformers
- Switches
- Safety Interlock Switches & Components
- Push Button Switches & Components
- Push Button Lamps & LEDs
- Push Button Tools
- Push Button Contact Blocks & Light Blocks
- Pilot Light Heads
- Pilot Lights
- Push Button Switches
- Push Button Lenses
- Push Button Adapters & Mounts
- Push Button Guards & Covers
- Emergency Stop Push Buttons
- Push Button Caps
- Push Button Labels & Legends
- Push Button Bezels
- Push Button Heads
- Pendant Switches
- Push Button Actuators
- Control Stations
- Switch Disconnectors & Components
- Domestic Installation Switches
- Rocker Switches & Components
- Foot Switches & Components
- Rotary Switches & Components
- Rope Pull Switches & Components
- Limit & Position Switches
- Capacitive, Magnetic and Piezo Switches
- DIP & Rotary Encoded Switches
- Joysticks & Components
- Micro Switches & Detector Switches
- Keyboard & Keypad Switches
- Key Switches & Selector Switches
- Safety Enabling & Control Switches
- Toggle Switches & Slide Switches
- Passive Components
- EMI Filters & Protection
- Surge Protection Components
- Antennas
- Fixed Resistors
- Inductors
- Variable Resistors
- Sounder, Buzzer & Microphone Components
- Capacitors
- Film Capacitors
- Aluminium Capacitors
- MLCCs - Multilayer Ceramic Capacitors
- Supercapacitors
- Polymer Capacitors
- Tantalum Capacitors
- Feedthrough Capacitors
- Mica Capacitors
- Single Layer Ceramic Capacitors
- Capacitors Accessories
- Niobium Oxide Capacitors
- Array Capacitors
- Aluminium Electrolytic Capacitors
- Ceramic Capacitors
- Feed Through Capacitors
- Safety Capacitors
- Capacitor Hardware
- Silicon RF Capacitors
- Trimmer
- Motor Start Capacitors & Motor Run Capacitors
- MLCCs
- Passive Components Kits
- Crystals, Oscillators & Resonators
- Rotary Encoders
- Filters
- EMI Filters
- Audio Transformers
- Encoders
- Frequency Control & Timing Devices
- Antenna Accessories
- Ferrites
- Inductors, Chokes & Coils
- Signal Conditioning
- Thermistors - NTC
- Varistors
- Potentiometers, Trimmers & Rheostats
- Thermistors - PTC
- Resistors
- Test & Measurement
- Data Acquisition & Logging
- Network Test & Measurement
- Electrical Test & Measurement
- Environmental Test & Measurement
- Multimeters & Accessories
- Bench Power Supplies & Sources
- Oscilloscopes & Accessories
- Weight & Force Test & Measurement
- Signal Generators & Analysers
- Test Connectors
- Test Leads & Test Lead Kits
- Temperature Test & Measurement
- RF Test & Measurement
- Electronic Component Testing
- Pressure Test & Measurement
- Speed Test & Measurement
- Lab Equipment
- Engineering Test & Measurement
- Test Equipment Accessories
- Attenuators - Interconnects
- Test Equipment Power Cords
- Plumbing & Pipeline
- Mechanical Power Transmission
- Enclosures & Server Racks
- Batteries & Chargers
- Raspberry Pi, Arduino, ROCK & Development Tools
- HVAC, Fans & Thermal Management
- Fuses & Circuit Breakers
- Engineering Materials & Industrial Hardware
- Power Tools, Soldering & Welding
- Displays & Optoelectronics
- Bearings & Seals
- Access, Storage & Material Handling
- Adhesives, Sealants & Tapes
- Security & Ironmongery
- Personal Protective Equipment & Workwear
- Office Supplies
- Facilities Cleaning & Maintenance
- Electronic components
- Circuit Protection
- Electromechanical
- Audio Devices
- Hardware
- Relays, Contactors & Solenoids
- I
- Industrial Automation
- Cameras & Accessories
- Circuit Protection
- Contactors
- Controllers
- Counters & Tachometers
- Ethernet & Communication Modules
- Hardware
- Human Machine Interface - HMI
- Industrial Connectors
- Industrial Development Tools
- Industrial Displays
- Industrial Enclosures
- Industrial Lighting & Indicators
- Industrial Power
- Industrial Sensors
- Industrial Switches
- Industrial Relays & Accessories
- Industrial Safety
- Industrial Terminal Blocks
- Motor Drives
- Printers
- Robotics
- Solenoids & Actuators
- Test & Measurement
- Timers
- Wire & Cable
- Circuit Breakers
- Encoders
- Switches
- Motors & Drives
- Knobs & Dials
- Printers
- Embedded Solutions
- Modules Accessories
- Memory & Data Storage
- Wireless & RF Modules
- Computing
- Engineering Tools
- Analogue & Digital IC Development Tools
- LED Lighting Development Tools
- Embedded Tools & Accessories
- RF
- Sensor Development Tools
- Power Management IC Development Tools
- Embedded Processor Development Kits
- Memory IC Development Tools
- Optoelectronic Development Tools
- Communication Development Tools
- Programmable Logic IC Development Tools
- Interface Modules
- Power Management Modules
- Sensor Modules
- Ethernet & Communication Modules
- Opto-electronics
- Power
- Power Management ICs
- LDO Voltage Regulators
- Linear Voltage Regulators
- Voltage References
- Supervisory Circuits
- Voltage Regulators - Switching Regulators
- AC
- Gate Drivers
- Battery Management
- Motor
- Switching Controllers
- LDO Voltage Controllers
- Hot Swap Voltage Controllers
- Current & Power Monitors & Regulators
- Power Factor Correction - PFC
- Optically Isolated Gate Drivers
- Galvanically Isolated Gate Drivers
- Wireless Charging ICs
- Battery Holders, Clips & Contacts
- DC Power Connectors
- Batteries
- AC Power Plugs & Receptacles
- Transformers
- Power Supplies
- Supercapacitors
- Solar Panels & Solar Cells
- AC Power Entry Modules
- Power Condition
- DC
- AC Power Leads
- DC Power Cords
- Power Management ICs
- RF & Wireless
- Thermistors
- Thermal Interface Products
- Heat Sinks
- Fan Accessories
- Board Mount Temperature Sensors
- Thermostats
- Thermal Cut-offs
- Industrial Temperature Sensors
- AC Fans
- Liquid Cold Plates, Liquid Cooling & Heat Pipes
- DC Fans
- Heat Sinks - LED
- Blowers & Centrifugal Fans
- Thermoelectric Peltier Modules
- Tools & Supplies
- Filters
- Engine and accessories
- Komatsu d37 d39 d41 d51 joystick valve gasket
- Komatsu d31 d32 valve cover bolt gasket
- Cover gasket doosan 65.01905-0009
- Front drive seal komatsu lw200 d31 hd320
- Komatsu wa120 wa150 wa180 security ring
- Komatsu d155 d31 hydraulic pump seal
- Kalamitka doosan s6710041 grease nipple
- Exhaust manifold nut volvo ec160b ec160c
- Filler cap doosan 2119-1063a 2160-1003
- Oil filler cap 65.01810-5011
- Doosan spacer 1.412-00164
- Daewoo Doosan DL200 injector seat o-ring
- Komatsu d155ax d275a pump piston oring seal
- Thermostat gasket daewoo doosan solar 170
- Doosan thermostat gasket 65.06901a0069
- Doosan thermostat o-ring 06.56342-1208
- O-ring doosan 2180-1026d23
- O-ring doosan s8000181
- Doosan connecting rod bearing 65.02410-0050
- Piston pin protection doosan 06.29020-0125
- Doosan intake valve 65.04101-0065b
- Valve seat doosan 65.03203-1062
- Pin securing pin volvo a30d a30e a35d
- Ball bushing k3v63dt
- Komatsu cap 20y-60-21440
- Steering system
- engine cooling
- Hydraulic system
- Fuel system
- The remaining
- Suspension system
- Body parts
- Lighting
- Work equipment
- Electrical system, ignition
- Exhaust system
- Heating, ventilation, air conditioning
- Drive system
- Caterpillars
- Interior furnishings
- Braking system
- For cars
- For motorcycles and scooters
- For other agricultural machinery
- Covers
- Luggage racks
- Trunks
- Plows
- Winches
- Assembly parts
- Engines and accessories
- Go-Kart Parts
- Aircraft Parts
- Quad Bike Parts
- Semiconductors
- Trailer & Semi Trailer Parts
- Camping
- Equipment
- Suspension system
- Marquesas
- Electrical system
- Kitchen equipment
- Parts
- Mirrors
- Atria
- Stairs and steps
- Gas installation
- Windows
- Trailer furniture
- Hoses and pipes
- Water containers
- Water instalation
- Ventilation
- Vehicle lighting
- Feet, supports, pads
- Toilets and cleaning products
- Solar panels
- Castles
- Support wheels
- Water pumps
- Seals
- Braking system
- Tourist lighting
- Antennas
- Door
- Hello
- Strips, covers
- Rating plates
- Freight
- The remaining
- Camping
- Forklift Parts
- Connectors
- Motorcycle Parts
- Other
- 1xElectronic components
- Anti-Static
- Electronic components
- Audio Products
- Battery Products
- Cable AssembliesBetween Series Adapter Cables
- Cable AssembliesBarrel Connector CablesBarrel Power Cables
- Cable AssembliesBarrel Connector CablesBarrel Audio Cables
- Cable AssembliesCircular Cable Assemblies
- Cables
- Wires - Management/Cable Ties and Zip Ties
- Wires - Management/Markers
- Wires - Management/Cable Supports and Fasteners
- Wires - Management/Heat Shrink Boots
- Wires - Management/Accessories
- Wires - Management/Heat Shrink Tubing
- Wires - Management/Cable Ties - Holders and Mountings
- Wires - Management/Labels
- Wires - Management/Cable and Cord Grips
- Wires - Management/Protective Hoses
- Wires/Single Conductor Cables (Hook-Up Wire)
- Wires - Management/Solder Sleeve
- Wires/Multiple Conductor Cables
- Wires/Flat Ribbon Cables
- Wires - Management/Bushings
- Wires - Management/Wire Ducts
- Wires - Management/Spiral Wrap
- Wires/Coaxial Cables (RF)
- Wires - Management/Grounding Braid
- Wires/Modular - Flat Cable
- Wires/Fiber Optic Cables
- Wires - Management/Fiber Optic Cables
- Capacitors
- Cable Assemblies/Specialized Cable Assemblies
- Cable Assemblies/Coaxial Cables (RF)
- Cable Assemblies/Flat Flex Ribbon Jumpers
- Cable Assemblies/Jumper Wires
- Cable Assemblies/Rectangular Cable Assemblies
- Cable Assemblies/Modular Cables
- Cable Assemblies/Flat Flex Jumpers
- Cable Assemblies/Power
- Cable Assemblies/Solid State Lighting Cables
- Cable Assemblies/USB Cables
- Cable Assemblies/Pluggable Cables
- Cable Assemblies/D-Sub Cables
- Cable Assemblies/Fiber Optic Cables
- Cable Assemblies/Video Cables (DVI
- Cable AssembliesCoaxial Cables (RF)
- Computer Equipment
- Industrial Automation and Controls
- Circuit Protection
- Crystals
- Development Boards
- Boxes
- Connectors
- Interconnects
- Rectangular Connectors
- Pluggable Connectors
- Barrel Connectors
- Backplane Connectors
- FFC
- Blade Type Power Connectors
- Coaxial Connectors (RF)
- Circular Connectors
- Contacts
- D-Sub
- Heavy Duty Connectors
- Fiber Optic Connectors
- Modular Connectors
- Card Edge Connectors
- Keystone Connectors
- Banana and Tip Connectors
- Memory Connectors
- Photovoltaic (Solar Panel) Connectors
- AC Power Connectors
- Between Series Adapters
- Shunts
- Terminal Blocks
- Solid State Lighting Connectors
- Terminals
- USB
- Terminal Strips and Turret Boards
- Sockets for ICs
- Interconnects
- Embedded Computers
- Fans
- Discrete Semiconductor Products
- Inductors
- Filters
- Integrated Circuits (ICs)
- Cable Assemblies
- Line Protection
- Networking Solutions
- Optical Inspection Equipment
- Motors
- Maker
- Memory - Modules
- Labels
- Magnetics - Transformer
- Optoelectronics
- Laser Diodes
- Lenses
- LED Emitters - Infrared
- LED Indication - Discrete
- LED White Lighting
- LED Color Lighting
- LED COBs
- LED Dot Matrix and Cluster
- LCD
- Optoelectronics Accessories
- Display Backlights
- LED Character and Numeric
- Circuit Board Indicators
- LED Addressable
- Reflectors
- Panel Indicators
- Cold Cathode Fluorescent (CCFL) & UV Lamps
- Lamp Replacements
- LED Thermal Products
- Spacers
- Light Pipes
- Fiber Optic Receivers
- Incandescent
- Fiber Optic Transmitters - Discrete
- Remote Phosphor Light Source
- Power Supplies - External
- Relays
- Prototyping
- Sensors
- Transducers
- Current Sensors
- Encoders
- Encoders - Industrial
- Float
- Force Sensors
- Gas Sensors
- Humidity
- Magnetic Sensors
- Magnets
- Motion Sensors
- Optical Sensors
- Position Sensors
- Pressure Sensors
- Proximity Sensors
- Sensor Cable Accessories
- Sensor Cable Assemblies
- Sensor
- Solar Cells
- Specialized Sensors
- Temperature Sensors
- Ultrasonic Receivers
- Transducers
- RF and Wireless
- Soldering
- Tapes
- Resistors
- Switches
- Uncategorized
- Transformers
- Tools
- Test and Measurement
- Industrial Supplies
- Potentiometers
- Power Supplies - Board Mount
- Hardware
- Isolators
- Kits
- Boat Parts
10 pcs : EFM8SB10F4G-A-QFN20R - 8-bit Microcontrollers - MCU 8051 25 MHz 4 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU
10 pcs : EFM8SB10F4G-A-QFN20R - 8-bit Microcontrollers - MCU 8051 25 MHz 4 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU
Product Details
10AllpartsUK6348SB10F4GAQF20R
EFM8SB10F4G-A-QFN20R
10 Items
Data sheet
- Manufacturer
- Silicon Laboratories
- Maximum Operating Temperature
- + 85 C
- Minimum Operating Temperature
- - 40 C
- Mounting Style
- SMD/SMT
- Product Type
- 8-bit Microcontrollers - MCU
- Interface Type
- I2C, SMBus, SPI, UART
- Package/Case
- QFN-20
- Core
- CIP-51 8051
- Product Category
- 8-bit Microcontrollers - MCU
- Program Memory Size
- 4 kB
- Packaging
- MouseReel
- RoHS
- Details
- Data RAM Size
- 512 B
- Maximum Clock Frequency
- 25 MHz
- ADC Resolution
- 12 bit
- Number of I/Os
- 16 I/O
- Supply Voltage - Min
- 1.8 V
- Supply Voltage - Max
- 3.6 V
- Data Bus Width
- 8 bit
- Brand
- Silicon Labs
- Data RAM Type
- SRAM
- Number of Timers/Counters
- 5 Timer
- Program Memory Type
- Flash
- Factory Pack Quantity Factory Pack Quantity
- 1500
- Subcategory
- Microcontrollers - MCU
10 pcs : EFM8SB10F4G-A-QFN20R - 8-bit Microcontrollers - MCU 8051 25 MHz 4 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU