ATMEGA16L-8MC - 8MHz AVR MCU, 16KB Flash, 44-VQFN | Microchip
MPN： ATMEGA16L-8MC ✓ 啟用中ATMEGA16L-8MC 概覽
An AVR ATmega microcontroller is an 8-bit MCU built on the AVR enhanced RISC architecture, in which 131 powerful instructions - most executing in a single clock cycle - feed 32 general purpose working registers. Within the component hierarchy, it sits as a microcontroller under the broader families of embedded processor, integrated circuit, and semiconductor, and competes with 8-bit families such as Microchip PIC16 and ST ST8 in cost-sensitive embedded control designs.
Key features include 16KB (8K x 16) In-System Programmable Flash with self-programming capability for bootloaders, a 10-bit successive-approximation ADC with 8 multiplexed channels, JTAG on-chip-debug, and integrated Brown-out Detection, Power-On Reset, PWM outputs, and a Watchdog Timer (WDT). The 'L' grade operates at up to 8 MHz across 2.7V to 5.5V, giving design headroom on both 3.3V and 5V rails.
Architecturally, the single-cycle ALU and Harvard memory structure deliver up to 8 MIPS at 8 MHz, making throughput predictable and deterministic - valuable for real-time control loops. The self-programming Flash allows firmware update in the field without an external programmer.
Typical applications include industrial sensor nodes using the 8-channel ADC, motor control and lighting systems using PWM, and battery-powered instrumentation where the low-voltage 'L' grade and low-power AVR core extend operating life.
Design consideration: at 8 MHz the maximum rating is fixed; the non-L ATMEGA16-16 parts run 16 MHz but require a higher minimum supply voltage, so decouple the 3.3V/5V rail decision with the clock frequency.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 ATMEGA16L-8MC — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ATMEGA16L-8MC （相同外形與佔位） — 差異在於 Package, SRAM, EEPROM, Program Memory Type, Serial Interfaces.
ATMEGA16A-MU
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATMEGA16-16MU
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ATMEGA32A-MU
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATMEGA8535L-8MI
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA16L-8MC 最大額定值與電氣特性
| Core Architecture | AVR 8-bit RISC |
| Core Size | 8-Bit |
| 最大時脈頻率 | 8 MHz |
| Program Memory Size | 16KB (8K x 16) FLASH |
| SRAM Size | 1KB |
| EEPROM Size | 512 Byte |
| ADC Resolution | 10-bit |
| Number of ADC Channels | 8 |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Throughput | Up to 8 MIPS at 8 MHz |
| Instructions | 131 (most single-clock cycle) |
| Debug Interface | JTAG (on-chip-debug) |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| 封裝 | 44-VQFN (7x7 mm), Exposed Pad |
| 安裝類型 | Surface Mount |
| Program Memory Type | Self-programming Flash (ISP) |
ATMEGA16L-8MC 44-vqfn (7x7 mm), exposed pad 腳位配置指南
ATMEGA16L-8MC（44-vqfn (7x7 mm), exposed pad 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： ATMEGA16L-8MC.
請參閱 資料表 以查看完整腳位配置。
典型應用
ATMEGA16L-8MC 適用於 6 應用s: Industrial Sensor Nodes, Battery-Powered Instrumentation, Motor Control and PWM Systems, Embedded Consumer Appliances, Data Acquisition and Test Fixtures, RF and Remote Control Systems.
Industrial Sensor Nodes
The ATMEGA16L-8MC fits industrial sensor nodes because its 8-channel 10-bit ADC digitizes up to eight analog sensors (temperature, pressure, level) without external converter ICs, and the 2.7V-5.5V supply range tolerates noisy industrial 5V rails. The Brown-out Detector and Watchdog Timer provide autonomous recovery in electrically harsh environments, resetting the MCU if the supply dips or firmware hangs. In typical use the node samples sensors through the ADC, applies filtering in the 1KB SRAM, and reports over UART/SPI using the 16KB Flash program space for a lightweight protocol stack. Running at 8 MHz or below keeps current draw low enough for passively cooled enclosures.
推薦
Battery-Powered Instrumentation
For battery-powered handheld instrumentation, the ATMEGA16L-8MC operates down to 2.7V, matching two alkaline cells or a 3.0V lithium coin cell through a small LDO, and the AVR low-power CMOS core supports idle and power-down sleep modes between measurements. The 512B EEPROM stores calibration coefficients across power cycles, while the 10-bit ADC reads the analog front end directly. Because active current scales with clock frequency, firmware typically idles at 32.768 kHz and wakes the core to 8 MHz only for computation, extending battery life substantially. The JTAG interface allows in-field diagnostics during product development and servicing without removing the 44-VQFN part from the board.
推薦
Motor Control and PWM Systems
The ATMEGA16L-8MC provides hardware PWM outputs that drive DC motor H-bridges and LED dimmers with cycle-accurate timing independent of software jitter. Its 8 MIPS RISC throughput at 8 MHz executes closed-loop PI control at kHz rates, reading feedback through the 10-bit ADC or external encoders on the interrupt pins. The integrated Watchdog Timer guards against firmware lockups that could leave a motor energized, a critical safety consideration. In typical use, Timer/Counter PWM channels command a MOSFET driver while the ADC samples current sense resistors every control cycle. The 44-VQFN exposed pad gives a solid ground reference for the mixed analog/digital control layout.
推薦
Embedded Consumer Appliances
Consumer appliances such as coffee makers, thermostats, and small display modules use the ATMEGA16L-8MC for its combination of a 16KB self-programming Flash (sufficient for a full UI and control firmware), 32 general purpose I/O lines across four ports, and a low 2.7V supply floor for battery-backed models. The integrated Power-On Reset and Brown-out Detector remove external supervisor ICs, reducing bill-of-materials cost in high-volume builds. The 44-VQFN 7x7 mm package fits compact appliance PCBs, and ISP Flash programming allows the same board to be configured for multiple product variants on the assembly line via a bed-of-nails fixture.
推薦
Data Acquisition and Test Fixtures
The ATMEGA16L-8MC serves as the controller in low-cost data acquisition and production test fixtures, where its 8-channel 10-bit ADC scans multiple test points and the JTAG interface supports boundary-scan verification of the surrounding PCB nets. The 16KB Flash holds a command interpreter over UART or SPI, letting a host PC script measurements, while the 1KB SRAM buffers sample blocks between transmissions. Clocking the AVR from a stable crystal yields deterministic sample timing with microsecond accuracy. Because the device operates from a single 5V USB-derived rail without extra regulators, fixture cost stays minimal while remaining field-updatable through the self-programming Flash bootloader.
推薦
RF and Remote Control Systems
In RF remote controls, keyless entry receivers, and wireless sensor transmitters, the ATMEGA16L-8MC provides the protocol processing layer between an RF transceiver module and the end application. Its fast single-cycle RISC core handles Manchester encoding/decoding and rolling-code algorithms within the 16KB Flash, while spare ADC channels monitor battery voltage for low-battery indication. The low 2.7V supply floor allows direct operation from a single lithium cell, and sleep-mode wake-up on external interrupt supports event-driven transmission that preserves coin-cell capacity. The compact 44-VQFN (7x7 mm) footprint suits key fob and remote unit mechanical constraints.
推薦
推薦產品摘要
工程參考資料，適用於 ATMEGA16L-8MC — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ATMEGA16A-MU | ATMEGA16-16MU | ATMEGA32A-MU | ATMEGA8535L-8MI | ATMEGA16L-8AJ |
|---|---|---|---|---|---|---|
| Package | 44-VQFN (7x7 mm) | 44-VQFN (7x7 mm) - same | 44-VQFN (7x7 mm) - same | 44-VQFN (7x7 mm) - same | 44-VQFN (7x7 mm) - same | 44-TQFP (10x10 mm) - footprint differs |
| Brand | Microchip Technology (Atmel) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash | 16KB | 16KB | 16KB | 32KB | 8KB | 16KB |
| SRAM | 1KB | 1KB | 1KB | 2KB | 512B | 1KB |
| Max Clock | 8 MHz | 16 MHz (A grade) | 16 MHz | 16 MHz | 8 MHz | 8 MHz |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 4.5 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| ADC | 8-ch, 10-bit | 8-ch, 10-bit | 8-ch, 10-bit | 8-ch, 10-bit | 8-ch, 10-bit | 8-ch, 10-bit |
| JTAG Debug | Yes | Yes | Yes | Yes | Yes | Yes |
主要差異化特點
- Low-voltage operation down to 2.7V at full 8 MHz (對比ATMEGA16-16MU)
- Half the Flash at lower cost vs footprint-compatible ATMEGA32A-MU (對比ATMEGA32A-MU)
- Smaller board area than TQFP sibling (對比ATMEGA16L-8AJ)
設計說明
Decouple VCC with 100 nF ceramic caps at each supply pin plus 10 uF bulk near the 44-VQFN, keeping the loop as short as possible to the exposed pad. If using the internal ADC, tie AVCC to VCC through a low-pass LC filter (10 uH + 100 nF) to isolate digital switching noise; ADC accuracy degrades noticeably with unfiltered AVCC ripple. Enable the Brown-out Detector at the fuse level (2.7V threshold for the L grade) so EEPROM writes are never performed at marginal supply.
The exposed pad of the 44-VQFN (7x7) must be soldered to a ground array of 4-5 via-connected pads; relying on perimeter pins alone leaves a floating die-attach that undermines signal integrity and the ADC reference. Follow the Atmel AVR Hardware Design Considerations application note for crystal layout: keep XTAL1/XTAL2 traces under 10 mm, guard with ground, and place load capacitors directly at the pins. Provide JTAG header access (TCK/TMS/TDO/TDI on PC2-PC5) even in production boards.
The -8 speed grade caps the clock at 8 MHz across the whole 2.7-5.5V range; overclocking to 16 MHz as done with non-L ATmega16 parts at 5V violates the datasheet and causes erratic behavior, especially below 4V. JTAG is enabled by default (JTAGEN fuse) and takes control of PC2-PC5 - if those port pins are needed as GPIO, disable JTAG via fuse. Also, EEPROM writes during brown-out corrupt data: always check the BOD enable fuse and the EEPROM Ready flag before write.
合規資訊
Compliance status not stated in the provided web data; verify RoHS/REACH status on the official Microchip product page before ordering.
