ATMEGA16L-8MJ - 8-bit AVR MCU, 16KB Flash 8MHz | Microchip
料号： ATMEGA16L-8MJ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.28 | $228.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.86 | $1,860.00 |
ATMEGA16L-8MJ 概述
Key features include the low-voltage L-suffix rating, operating from 2.7V to 5.5V at up to 8MHz, an 8-channel 10-bit ADC, a JTAG interface for on-chip debug (JTAG OCD emulation and boundary scan), and self-programming Flash for field firmware updates. Peripheral set includes two 8-bit timers, one 16-bit timer, four PWM channels, SPI, TWI (I2C-compatible), and a programmable serial USART.
Technically, the device uses the AVR enhanced RISC Harvard architecture with separate instruction and data buses, achieving near-one-MIPS-per-MHz efficiency while remaining low-power. Brown-out detection, an internal RC oscillator, and six sleep modes (including Power-down and Power-save with RTC) support battery-operated designs.
Typical applications include industrial automation control, sensor data acquisition using the 8-channel 10-bit ADC, battery-powered instrumentation, HVAC and motor control panels, and consumer appliances. The 44-VQFN 7x7 mm footprint saves board area versus the 44-TQFP variant while retaining full I/O access.
Design considerations: verify oscillator selection against the 8MHz L-grade speed limit and enable Brown-Out Detection for supply-dip immunity. This page synthesizes distributor inventory, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： ATMEGA16L-8MJ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ATMEGA16L-8MJ （相同外形与封装尺寸） ——差异在于 Package, Program Memory Size, Timers, ADC, Core Processor.
快速对比工具——选择替代料号进行并排对比：
ATMEGA16L-8MU
✅ 直接替换✓ 有现货
$6.13 / 个
查看数据手册 →ATMEGA16A-MU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.64 / 个
查看数据手册 →ATMEGA32L-8MJ
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$4.11 / 个
查看数据手册 →ATMEGA32A-MU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
联系询价
查看数据手册 →ATMEGA8535L-8MJ
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATMEGA16L-8MJ 最大额定值与电气特性
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 8 MHz |
| Flash Memory Size | 16 KB (8K x 16) |
| SRAM Size | 1 KB |
| EEPROM Size | 512 Bytes |
| Supply Voltage Range | 2.7 V to 5.5 V |
| MIPS Throughput | Up to 8 MIPS at 8 MHz |
| Instructions | 131 powerful instructions |
| ADC | 8-channel 10-bit |
| Timers | Two 8-bit, one 16-bit |
| PWM Channels | 4 |
| Communication Interfaces | SPI, TWI (I2C), USART |
| JTAG Interface | Yes (on-chip debug and boundary scan) |
| 封装 | 44-VQFN (7x7 mm) Exposed Pad |
| 安装类型 | Surface Mount |
| Oscillator Type | Internal |
ATMEGA16L-8MJ 引脚配置
| 引脚 1 | PB4 (SS) — Port B bit 4 / SPI slave select |
| 引脚 2 | PB5 (MOSI) — Port B bit 5 / SPI master output |
| 引脚 3 | PB6 (MISO) — Port B bit 6 / SPI master input |
| 引脚 4 | PB7 (SCK/OC2) — Port B bit 7 / SPI clock / Timer2 output compare |
| 引脚 5 | RESET — Active-low reset input |
| 引脚 6 | VCC — Digital supply voltage (2.7V-5.5V) |
| 引脚 7 | GND — Ground |
| 引脚 8 | XTAL2 — Oscillator output / clock output |
| 引脚 9 | XTAL1 — Oscillator input / external clock input |
| 引脚 10 | PD0 (RXD) — Port D bit 0 / USART receive |
| 引脚 11 | PD1 (TXD) — Port D bit 1 / USART transmit |
| 引脚 12 | PD2 (INT0) — Port D bit 2 / external interrupt 0 |
| 引脚 13 | PD3 (INT1) — Port D bit 3 / external interrupt 1 |
| 引脚 14 | PD4 (OC1B) — Port D bit 4 / Timer1 output compare B |
| 引脚 15 | PD5 (OC1A) — Port D bit 5 / Timer1 output compare A |
| 引脚 16 | PD6 (ICP1) — Port D bit 6 / Timer1 input capture |
| 引脚 17 | PD7 (OC2) — Port D bit 7 / Timer2 output compare |
| 引脚 18 | VCC — Digital supply voltage |
| 引脚 19 | GND — Ground |
| 引脚 20 | PC0 (SCL) — Port C bit 0 / TWI clock / JTAG TCK |
| 引脚 21 | PC1 (SDA) — Port C bit 1 / TWI data / JTAG TMS |
| 引脚 22 | PC2 (TCK) — Port C bit 2 / JTAG test clock |
| 引脚 23 | PC3 (TMS) — Port C bit 3 / JTAG test mode select |
| 引脚 24 | PC4 (TDO) — Port C bit 4 / JTAG test data out / Timer2 TOSC1 |
| 引脚 25 | PC5 (TDI) — Port C bit 5 / JTAG test data in / Timer2 TOSC2 |
| 引脚 26 | PC6 (TOSC1) — Port C bit 6 / Timer2 oscillator input |
| 引脚 27 | PC7 (TOSC2) — Port C bit 7 / Timer2 oscillator output |
| 引脚 28 | AVCC — Analog supply voltage for ADC |
| 引脚 29 | GND — Analog ground |
| 引脚 30 | AREF — ADC analog reference input |
| 引脚 31 | PA7 (ADC7) — Port A bit 7 / ADC channel 7 |
| 引脚 32 | PA6 (ADC6) — Port A bit 6 / ADC channel 6 |
| 引脚 33 | PA5 (ADC5) — Port A bit 5 / ADC channel 5 |
| 引脚 34 | PA4 (ADC4) — Port A bit 4 / ADC channel 4 |
| 引脚 35 | PA3 (ADC3) — Port A bit 3 / ADC channel 3 |
| 引脚 36 | PA2 (ADC2) — Port A bit 2 / ADC channel 2 |
| 引脚 37 | PA1 (ADC1) — Port A bit 1 / ADC channel 1 |
| 引脚 38 | PA0 (ADC0) — Port A bit 0 / ADC channel 0 |
| 引脚 39 | GND — Ground |
| 引脚 40 | VCC — Digital supply voltage |
| 引脚 41 | PB0 (XCK/T0) — Port B bit 0 / USART external clock / Timer0 external input |
| 引脚 42 | PB1 (T1) — Port B bit 1 / Timer1 external counter input |
| 引脚 43 | PB2 (AIN0/INT2) — Port B bit 2 / comparator input 0 / external interrupt 2 |
| 引脚 44 | PB3 (AIN1/OC0) — Port B bit 3 / comparator input 1 / Timer0 output compare |
典型应用
ATMEGA16L-8MJ 适用于 6 应用s: Industrial Automation and Control, Sensor Data Acquisition Systems, Battery-Powered Portable Instruments, Motor Control and PWM Systems, Embedded Communication Nodes, Consumer Appliances and HVAC Control.
Industrial Automation and Control
The ATMEGA16L-8MJ fits industrial control panels and automation nodes because its 2.7V to 5.5V supply tolerance rides through noisy 5V industrial rails, its 32 GPIO lines drive relays, optocouplers, and indicator banks directly, and the 16KB ISP Flash holds typical ladder-equivalent control logic with room for field updates via self-programming. The JTAG on-chip-debug interface shortens commissioning by allowing breakpoints and register inspection in the target cabinet. In a typical deployment, the MCU scans buttons and sensors on ports B/C, drives contactors through port D PWM and GPIO, and reports status over the USART or TWI bus to a supervisory PLC. The industrial temperature rating and green RoHS packaging support long-lifetime panel builds.
推荐
Sensor Data Acquisition Systems
The built-in 8-channel 10-bit ADC is the headline fit for data acquisition: eight analog inputs on port A can be scanned under timer control at up to 15 kSPS-class rates, with the internal bandgap reference or the external AREF pin providing conversion references. The 1KB SRAM buffers sample blocks before pushing them over SPI to storage or over USART to a host, while the 16-bit timer time-stamps events. The ATMEGA16L-8MJ operates from 2.7V so it shares a 3.3V sensor rail directly, and its 44-VQFN 7x7 mm exposed-pad package keeps the analog front end compact with short trace lengths to the sensor connector, improving noise performance on low-level signals.
推荐
Battery-Powered Portable Instruments
Battery instruments benefit from the L-grade 2.7V-5.5V operating range, which lets a two-cell alkaline or single lithium cell power the MCU without a regulator, and from the AVR sleep-mode architecture: Power-down and Power-save modes cut consumption to microamp levels while external interrupts or a watchdog wake the core on demand. The internal RC oscillator removes the cost and quiescent drain of an external crystal in coarse-timing designs. Typical products include handheld meters, portable loggers, and wireless sensor tags using the USART or SPI to a radio module. Designers should enable Brown-Out Detection so the device does not miswrite EEPROM as the battery decays, a documented pitfall in AVR low-power designs.
推荐
Motor Control and PWM Systems
With four PWM channels generated by the two 8-bit timers and the 16-bit timer, the ATMEGA16L-8MJ directly controls DC motor drivers, servo positions, and LED dimming stages. The OC1A/OC1B outputs on PD5/PD4 provide hardware PWM independent of software timing, and the input-capture unit measures motor tachometer periods for closed-loop speed regulation. A typical circuit pairs the MCU with an H-bridge or MOSFET driver on port D, using the ADC to read current-sense shunts and the comparator for fast overcurrent trips. Operating from 5V gives gate-drive headroom for logic-level MOSFETs, and the 44-VQFN exposed pad sinks heat from the driver stage on shared two-layer boards.
推荐
Embedded Communication Nodes
The USART, SPI, and TWI (I2C-compatible) interfaces make the ATMEGA16L-8MJ a natural protocol bridge and communication node: it converts RS-232/RS-485 serial traffic to SPI sensor buses, or acts as a TWI master coordinating RTC, EEPROM, and display slaves. The USART supports baud rates up to 500 kbps-class at 8MHz with the U2X doubling option, and TWI allows multi-drop networks with only two wires. The 16KB self-programming Flash permits field firmware updates delivered over the serial link, an important logistics benefit for deployed nodes. The JTAG boundary-scan capability also assists board-level test of assembled communication backplanes during production, reducing ICT fixture cost.
推荐
Consumer Appliances and HVAC Control
Appliance and HVAC controllers value the ATMEGA16L-8MJ combination of an internal oscillator (eliminating crystals in cost-sensitive boards), brown-out detection for supply-dip immunity, 512B EEPROM for storing user settings and calibration data across power cycles, and 32 I/O lines for keypads, displays, and triac drives. The four PWM channels dim heaters and fans, while the 10-bit ADC reads NTC thermistors on multiple zones. Its 5V operation matches legacy appliance supply rails, and the green RoHS MLF package meets modern environmental requirements. The JTAG interface enables production diagnostics, and the mature AVR toolchain (AVR GCC, Microchip Studio) lowers firmware development cost for appliance OEMs.
推荐
推荐产品汇总
工程参考数据： ATMEGA16L-8MJ ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ATMEGA16L-8MU | ATMEGA16A-MU | ATMEGA32L-8MJ | ATMEGA8535L-8MJ |
|---|---|---|---|---|---|
| Package | 44-VQFN (7x7 mm) Exposed Pad | 44-VQFN (7x7 mm) - same | 44-VQFN (7x7 mm) - same | 44-VQFN (7x7 mm) - same | 44-VQFN (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB (8K x 16) | 16 KB | 16 KB | 32 KB | 8 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 2 KB | 512 B |
| EEPROM | 512 Bytes | 512 Bytes | 512 Bytes | 1 KB | 512 Bytes |
| Max Speed | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Supply Voltage | 2.7 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 | 2.7 V to 5.5 V |
| JTAG On-Chip Debug | Yes | Yes | Yes | Yes | Yes |
| ADC | 8-channel 10-bit | 8-channel 10-bit | 8-channel 10-bit | 8-channel 10-bit | 8-channel 10-bit |
关键差异点
- Same-footprint in-stock substitute available （对比 ATMEGA16L-8MU)
- JTAG on-chip debug retained （对比 ATMEGA8535L-8MJ)
- Cost/memory trade-off vs ATMEGA32L-8MJ （对比 ATMEGA32L-8MJ)
设计说明
Decouple both VCC pads and AVCC with 100 nF ceramic capacitors placed within 2-3 mm of the pads, plus a 4.7-10 uF bulk capacitor per supply domain. AVCC must be connected to VCC even if the ADC is unused (per the ATmega16L datasheet requirement) and should be filtered through an LC network when ADC accuracy matters. Enable the Brown-Out Detection fuse (typically 2.7V threshold for the L-grade) so the MCU halts cleanly before EEPROM corruption during brown-out events.
The 44-VQFN (7x7 mm) exposed pad must be soldered to a grounded thermal land with an array of thermal vias; a floating exposed pad degrades both thermal performance and ground integrity. Use a slightly enlarged paste aperture (approximately 80-90% coverage) to avoid voiding under the leadless package during reflow. Route the ADC analog ground as a quiet island connected to the main ground at one point near pin 29, and keep AREF traces short with a dedicated 100 nF bypass to ground.
Three frequent mistakes with this part: (1) clocking the L-grade above 8MHz - the 8MJ is limited to 8MHz across 2.7-5.5V; use the 16MHz standard grade if more speed is needed. (2) Leaving JTAGEN fused on and losing PC2-PC5 as I/O - clear the fuse if those pins are needed. (3) Selecting TOSC on PC6/PC7 while also using them as GPIO - the 32.768 kHz Timer2 oscillator takes precedence. Always verify fuse settings in Microchip Studio before programming production units.
Estimated: an ATmega16L-8MJ at 5V, 8MHz, driving 20 loads of 10 mA each dissipates roughly 5V x 20 mA (core) + 5V x 200 mA (I/O) = about 1.1 W worst case; the exposed-pad VQFN with a solid ground pour keeps the junction well within the industrial rating, but designs driving maximum I/O current on all 32 pins should verify the package thermal data in the Microchip package drawing rather than assuming headroom.
合规信息
FindIC records the ATMEGA16L-8MJ as IND TEMP, GREEN; green designation indicates RoHS/lead-free compliance. REACH and halogen-free declarations not found in the provided data - request certificate of conformance from Microchip.