ATMEGA168-15MT - AVR 8-Bit MCU 16MHz 16KB QFN-32 | Microchip
MPN： ATMEGA168-15MT ✓ 啟用中ATMEGA168-15MT 概覽
An 8-bit microcontroller is a single-chip computer that integrates a processor core, program memory, data memory and peripherals such as timers, UART, SPI and I2C on one die. The AVR family uses an enhanced RISC architecture that executes most instructions in a single clock cycle, achieving throughput near 1 MIPS per MHz, which lets designers optimize power consumption versus processing speed. Microcontrollers sit at the top of the embedded hierarchy above logic ICs and below application processors.
Key features include the 16 KB self-programmable FLASH supporting ISP and IAP, 23 programmable I/O lines, two 8-bit timers, one 16-bit timer, a 10-bit ADC with up to 8 channels (ADC6/ADC7 available in QFN), USI-free full duplex USART, SPI and TWI (I2C) serial interfaces, and six sleep modes down to power-save levels for battery designs. The 5x5 mm QFN with exposed pad provides low inductance and good thermal performance for compact boards.
Technically, the ATmega168 core combines 32 general-purpose registers directly connected to the ALU, allowing two independent registers to be accessed in one instruction. On-chip debug is supported via debugWIRE with single-wire interface using the reset line, programmed through ICSP with tools such as MPLAB SNAP.
Typical applications include automotive body and comfort modules (leveraging the AEC-Q100 qualification), industrial sensor nodes, consumer appliance control, and hobby/Arduino-compatible designs where the ATmega328 pinout heritage applies.
Design consideration: at 16 MHz the 5 V supply range applies (4.5 V to 5.5 V class, -15 speed grade); if operating at 3.3 V, verify maximum safe clock frequency in the datasheet frequency-versus-voltage curve.
This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in a single manufacturer datasheet, with pricing as of 2026-09-16.
直接替換替代品，適用於 ATMEGA168-15MT — 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： ATMEGA168-15MT （相同外形與佔位） — 差異在於 Package, Communication Interfaces, EEPROM, SRAM, Flash Memory.
ATMEGA168-15MD
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA168PA-MU
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATMEGA328P-MU
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA88PA-MU
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATMEGA48PA-MU
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA168-15MT 最大額定值與電氣特性
| Core | AVR 8-bit RISC |
| 最大時脈頻率 | 16 MHz |
| Flash Memory | 16 KB (8K x 16) |
| SRAM | 1 KB |
| EEPROM | 512 B |
| 供應電壓 | 4.5 V to 5.5 V (-15 speed grade) |
| I/O Count | 23 I/O |
| ADC Resolution | 10-bit |
| ADC Channels | 8 (6 external + ADC6/ADC7 on QFN) |
| Timers | 2 x 8-bit, 1 x 16-bit |
| Communication Interfaces | USART, SPI, TWI (I2C) |
| 封裝 | 32-VFQFN Exposed Pad (5x5 mm) |
| 安裝類型 | Surface Mount |
| Qualification | AEC-Q100 (automotive) |
| Programming / Debug | ICSP, debugWIRE |
| Sleep Modes | 6 modes including Power-down and Power-save |
| Instruction Throughput | Up to 16 MIPS at 16 MHz (approx. 1 MIPS/MHz) |
| RoHS 狀態 | Compliant |
ATMEGA168-15MT 腳位配置
| 腳位 1 | PD3 — Port D bit 3 / PCINT19 / OC2B / INT1 |
| 腳位 2 | PD4 — Port D bit 4 / PCINT20 / XCK / T0 |
| 腳位 3 | GND — Ground |
| 腳位 4 | VCC — Digital supply voltage |
| 腳位 5 | GND — Ground |
| 腳位 6 | VCC — Digital supply voltage |
| 腳位 7 | PB6 — Port B bit 6 / PCINT6 / XTAL1 / TOSC1 |
| 腳位 8 | PB7 — Port B bit 7 / PCINT7 / XTAL2 / TOSC2 |
| 腳位 9 | PD5 — Port D bit 5 / PCINT21 / T1 / OC0B |
| 腳位 10 | PD6 — Port D bit 6 / PCINT22 / AIN0 / OC0A |
| 腳位 11 | PD7 — Port D bit 7 / PCINT23 / AIN1 |
| 腳位 12 | PB0 — Port B bit 0 / PCINT0 / XCK / T0 / CLKO |
| 腳位 13 | PB1 — Port B bit 1 / PCINT1 / OC1A |
| 腳位 14 | PB2 — Port B bit 2 / PCINT2 / SS / OC1B |
| 腳位 15 | PB3 — Port B bit 3 / PCINT3 / MOSI / OC2A |
| 腳位 16 | PB4 — Port B bit 4 / PCINT4 / MISO |
| 腳位 17 | PB5 — Port B bit 5 / PCINT5 / SCK |
| 腳位 18 | AVCC — ADC supply voltage |
| 腳位 19 | ADC6 — ADC input channel 6 (QFN package only) |
| 腳位 20 | AREF — ADC analog reference |
| 腳位 21 | GND — Ground |
| 腳位 22 | ADC7 — ADC input channel 7 (QFN package only) |
| 腳位 23 | PC0 — Port C bit 0 / PCINT8 / ADC0 |
| 腳位 24 | PC1 — Port C bit 1 / PCINT9 / ADC1 |
| 腳位 25 | PC2 — Port C bit 2 / PCINT10 / ADC2 |
| 腳位 26 | PC3 — Port C bit 3 / PCINT11 / ADC3 |
| 腳位 27 | PC4 — Port C bit 4 / PCINT12 / ADC4 / SDA |
| 腳位 28 | PC5 — Port C bit 5 / PCINT13 / ADC5 / SCL |
| 腳位 29 | PC6 — Port C bit 6 / PCINT14 / RESET |
| 腳位 30 | PD0 — Port D bit 0 / PCINT16 / RXD |
| 腳位 31 | PD1 — Port D bit 1 / PCINT17 / TXD |
| 腳位 32 | PD2 — Port D bit 2 / PCINT18 / INT0 |
典型應用
ATMEGA168-15MT 適用於 6 應用s: Automotive Body Electronics, Industrial Sensor Nodes, Arduino-Compatible Prototyping, Consumer Appliance Control, Battery-Operated Handheld Instruments, Motor Control (Small DC / Stepper).
Automotive Body Electronics
The ATMEGA168-15MT carries AEC-Q100 qualification, making it suitable for automotive body and comfort modules such as window lifters, seat control, lighting drivers and sensor interfaces operating in harsh cabin environments. Its 16 MHz AVR core delivers roughly 16 MIPS for real-time control loops, while the 16 KB FLASH holds protocol handling and diagnostics code. The 10-bit ADC with up to 8 channels samples potentiometers and NTC sensors, and the USART/SPI/TWI interfaces link to LIN transceivers or gateways. The 5 V supply range (4.5 V to 5.5 V) matches automotive regulated rails after a 5 V LDO. Designers should implement watchdog supervision and verify load-dump transients on the upstream supply.
推薦
Industrial Sensor Nodes
In industrial monitoring, the ATMEGA168-15MT reads analog sensors through its 10-bit ADC (8 channels in the QFN package) and transmits data over the TWI (I2C) or SPI bus to network controllers, or over USART to RS-485 converters. The single-cycle RISC core at 16 MHz handles filtering and thresholding in deterministic time, important for alarm responsiveness. Six sleep modes allow duty-cycled operation in powered installations where average current matters. The 16 KB FLASH accommodates Modbus-style register handling and calibration tables in EEPROM (512 B). Its AEC-Q100 build also gives industrial users extended reliability margin versus consumer-grade MCUs at similar cost.
推薦
Arduino-Compatible Prototyping
The ATmega168 family is historically the heart of Arduino-class boards, and the ATMEGA168-15MT in 32-VFQFN serves compact, cost-optimized derivatives of those designs. The AVR core runs existing ATmega168 toolchains: AVRs are supported by avr-gcc, MiniCore and Arduino bootloaders, and ICSP programming works with MPLAB SNAP or USBasp. The 23 I/O lines map directly to standard shield pinouts, and the QFN bonus channels ADC6/ADC7 give two extra analog inputs not present on DIP variants. Developers should size their sketch against the 16 KB FLASH limit and move to pin-compatible ATMEGA328P-MU if the application outgrows it, with no PCB change.
推薦
Consumer Appliance Control
Washer, cooker and HVAC control boards use the ATMEGA168-15MT to sequence relays and triacs, read user interfaces, and monitor temperatures. The two 8-bit timers generate PWM for heater or fan control while the 16-bit timer measures zero-crossing or encoder feedback. The 5 V class supply integrates with existing linear or buck-derived appliance rails, and the exposed-pad QFN dissipates switching-adjacent heat efficiently on 2-layer boards. The 512 B EEPROM stores wash-cycle profiles and fault logs across power cycles. Cost per function is competitive at distributor pricing near $1.55 (as of 2026-09-16), which matters in high-volume appliance BOMs.
推薦
Battery-Operated Handheld Instruments
Handheld meters and testers benefit from the ATMEGA168-15MT's six sleep modes: power-down mode drops core current to microamp levels while retaining register and SRAM contents, and the asynchronous timer can wake the device periodically. The 10-bit ADC digitizes measurement front-ends, and the USART streams results to Bluetooth or USB-serial bridges. The 5 V operation supports direct 4xAAA or single-cell Li-ion via small LDO topologies. Designers should schedule ADC and reference startup times into the duty cycle and disable the digital input buffers on unused analog pins per the datasheet to minimize leakage. The AEC-Q100 build adds ruggedness for field instruments.
推薦
Motor Control (Small DC / Stepper)
The ATMEGA168-15MT generates PWM on multiple channels (OC0A/OC0B/OC1A/OC1B/OC2A/OC2B outputs) to drive H-bridges for small DC motors and steppers in printers, robotics and valve actuators. The 16-bit Timer1 provides high-resolution PWM or input capture for tachometer feedback, and external interrupts on any pin support quadrature decoding. Running at 16 MHz gives 62.5 ns PWM edge resolution, sufficient for quiet 20 kHz fan drive. The 23 I/O lines allow direct keypad and limit-switch interfacing. Use the exposed pad ground connection to keep driver return currents away from the ADC ground, preventing offset errors in current-sense measurements.
推薦
推薦產品摘要
工程參考資料，適用於 ATMEGA168-15MT — 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 | ATMEGA168-15MD | ATMEGA168PA-MU | ATMEGA328P-MU | ATMEGA88PA-MU | ATMEGA48PA-MU |
|---|---|---|---|---|---|---|
| Package | 32-VFQFN (5x5) Exposed Pad | 32-VFQFN (5x5) Exposed Pad - same | 32-VFQFN (5x5) Exposed Pad - same | 32-VFQFN (5x5) Exposed Pad - same | 32-VFQFN (5x5) Exposed Pad - same | 32-VFQFN (5x5) Exposed Pad - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 16 KB | 16 KB | 32 KB | 8 KB | 4 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 2 KB | 1 KB | 512 B |
| Max Clock Frequency | 16 MHz | 16 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Low-Power Technology | Standard ATmega168 | Standard (same die) | picoPower | picoPower | picoPower | picoPower |
主要差異化特點
- AEC-Q100 automotive qualification (對比ATMEGA168PA-MU)
- More memory headroom at same footprint (對比ATMEGA88PA-MU)
- Lower unit cost for smaller firmware (對比ATMEGA328P-MU)
- Trade-off: 16 MHz speed cap vs 20 MHz PA parts (對比ATMEGA48PA-MU)
設計說明
The 32-VFQFN exposed pad should be soldered to a ground pad with a 3x3 or 4x4 via array to the ground plane. This reduces ground inductance for the fast AVR edges and improves heat dissipation. Use a stencil with reduced paste coverage (50-70%) under the package to avoid solder bridging at the 0.5 mm pitch, and confirm your assembly house has QFN reflow experience.
Decouple each VCC pin (pins 4 and 6) and AVCC (pin 18) with 100 nF ceramic capacitors placed within 2 mm of the pins, plus one bulk 4.7-10 uF capacitor. Tie AVCC to VCC through a low-pass LC or RC network if ADC noise performance matters; AVCC must never differ from VCC by more than 0.3 V per the family datasheet.
PC6 is RESET by default and debugWIRE disables external reset when enabled - to re-enable ISP programming after using debugWIRE, cycle power with the debugger attached. Fuse misconfiguration (wrong clock source selection) is the most common cause of a 'bricked' device; keep an external clock option available during development.
When using an external 16 MHz crystal on PB6/PB7, place it within 5 mm of the pins with ground guard traces, and select appropriate load capacitors (typically 18-22 pF for common crystals) per the crystal manufacturer's CL specification to avoid startup failure at low temperature.
合規資訊
RoHS compliance and AEC-Q100 automotive qualification per distributor listings (Hotenda, DigiKey). REACH and conflict minerals status not stated in provided data.
