ATMEGA168-15AT1 - 16MHz AVR 16KB Flash MCU 32-TQFP | Microchip
料号： ATMEGA168-15AT1 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.66 | $16.60 |
| 100 | $1.42 | $142.00 |
| 500 | $1.25 | $625.00 |
| 1,000 | $1.1 | $1,100.00 |
ATMEGA168-15AT1 概述
An 8-bit AVR microcontroller is a single-chip computer integrating a RISC processor core, program memory (FLASH), data memory (SRAM and EEPROM), and peripherals on one die. Within the power-management and embedded-systems hierarchy, microcontrollers like the ATmega168 sit at the device-control layer, executing firmware that manages sensors, actuators, and communication in electronic products.
Key features include 16KB of self-programmable FLASH with read-while-write capability, 512B of EEPROM, 1KB of internal SRAM, and 23 general-purpose I/O lines. The advanced RISC architecture executes 133 powerful instructions, most in a single clock cycle, with 32 general-purpose working registers directly connected to the ALU.
Technical depth: the AVR enhanced RISC core achieves near-1 MIPS/MHz efficiency, letting designers trade clock speed directly for power savings. Peripherals include two 8-bit timers, one 16-bit timer, a 10-bit ADC with 8 channels, USI-capable serial interfaces (SPI and I2C-compatible TWI), a USART, analog comparator, and six PWM channels. In-circuit debugging and In-Circuit Serial Programming (ICSP) are supported via the reset line and two device I/O pins.
Typical applications include automotive body-control and sensor nodes (leveraging the -15AT1 temperature grade and AEC-Q100 qualification), industrial control and instrumentation, and consumer embedded systems such as appliances, keyboards, and battery chargers.
Design consideration: decouple VCC and AVCC separately with 100nF ceramics placed close to pins 4/6 and 18, and keep the analog ground path clean to preserve ADC accuracy in mixed-signal layouts.
This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： ATMEGA168-15AT1 ——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： ATMEGA168-15AT1 （相同外形与封装尺寸） ——差异在于 Operating Temperature, Package, Core Architecture, Supply Voltage Range, Instruction Set.
快速对比工具——选择替代料号进行并排对比：
ATMEGA168PA-AU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$0.98 / 个
查看数据手册 →ATMEGA168A-AU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.42 / 个
查看数据手册 →ATMEGA328P-AU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.74 / 个
查看数据手册 →ATMEGA88-15AT1
✅ 直接替换📋 参考替代料（不在目录中）
ATMEGA48-15AT
✅ 直接替换📋 参考替代料（不在目录中）
ATMEGA168-15AZ
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.18 / 个
查看数据手册 →ATMEGA168-15AT1 最大额定值与电气特性
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 16 MHz |
| Program Memory Size | 16 KB (8K x 16) FLASH |
| EEPROM Size | 512 B |
| RAM Size | 1 KB SRAM |
| Supply Voltage Range | 2.7 V to 5.5 V |
| I/O Count | 23 (product page); up to 53 I/O listed for family variants |
| Timers | Two 8-bit, one 16-bit |
| ADC Resolution | 10-bit |
| PWM Channels | 6 |
| 工作温度 | -40C to +105C |
| 封装 | 32-TQFP (7x7 mm) |
| 安装类型 | Surface Mount |
| Qualification | AEC-Q100 Qualified |
| Programming Interface | ICSP (In-Circuit Serial Programming) |
| 生命周期状态 | Active |
ATMEGA168-15AT1 引脚配置
| 引脚 1 | PD3 — Port D bit 3 / INT1 / OC2B / PCINT19 |
| 引脚 2 | PD4 — Port D bit 4 / XCK / T0 / PCINT20 |
| 引脚 3 | GND — Ground |
| 引脚 4 | VCC — Digital supply voltage |
| 引脚 5 | GND — Ground |
| 引脚 6 | VCC — Digital supply voltage |
| 引脚 7 | PB6 — Port B bit 6 / XTAL1 / TOSC1 |
| 引脚 8 | PB7 — Port B bit 7 / XTAL2 / TOSC2 |
| 引脚 9 | PD5 — Port D bit 5 / OC0B / T1 / PCINT21 |
| 引脚 10 | PD6 — Port D bit 6 / OC0A / AIN0 / PCINT22 |
| 引脚 11 | PD7 — Port D bit 7 / AIN1 / PCINT23 |
| 引脚 12 | PB0 — Port B bit 0 / ICP1 / CLKO / PCINT0 |
| 引脚 13 | PB1 — Port B bit 1 / OC1A / PCINT1 |
| 引脚 14 | PB2 — Port B bit 2 / SS / OC1B / PCINT2 |
| 引脚 15 | PB3 — Port B bit 3 / MOSI / OC2A / PCINT3 |
| 引脚 16 | PB4 — Port B bit 4 / MISO / PCINT4 |
| 引脚 17 | PB5 — Port B bit 5 / SCK / PCINT5 |
| 引脚 18 | AVCC — ADC supply voltage |
| 引脚 19 | ADC6 — ADC input channel 6 |
| 引脚 20 | AREF — Analog reference voltage |
| 引脚 21 | GND — Ground |
| 引脚 22 | ADC7 — ADC input channel 7 |
| 引脚 23 | PC0 — Port C bit 0 / ADC0 / PCINT8 |
| 引脚 24 | PC1 — Port C bit 1 / ADC1 / PCINT9 |
| 引脚 25 | PC2 — Port C bit 2 / ADC2 / PCINT10 |
| 引脚 26 | PC3 — Port C bit 3 / ADC3 / PCINT11 |
| 引脚 27 | PC4 — Port C bit 4 / ADC4 / SDA / PCINT12 |
| 引脚 28 | PC5 — Port C bit 5 / ADC5 / SCL / PCINT13 |
| 引脚 29 | PC6 — Port C bit 6 / RESET / PCINT14 |
| 引脚 30 | PD0 — Port D bit 0 / RXD / PCINT16 |
| 引脚 31 | PD1 — Port D bit 1 / TXD / PCINT17 |
| 引脚 32 | PD2 — Port D bit 2 / INT0 / PCINT18 |
典型应用
ATMEGA168-15AT1 适用于 6 应用s: Automotive Body and Sensor Nodes, Industrial Control and Instrumentation, Consumer Embedded Systems, Battery-Powered and Low-Power Devices, Motor Control and PWM Actuation, Hobby, Education, and Prototyping.
Automotive Body and Sensor Nodes
The ATMEGA168-15AT1 fits automotive body-control and sensor-node duties because it combines AEC-Q100 qualification with a -40C to +105C operating range, covering under-hood-adjacent and cabin environments. Its 16KB FLASH accommodates LIN-style polling firmware, while the 10-bit ADC digitizes resistive sensor inputs such as coolant level or position feedback with 1024-count resolution. The 2.7V to 5.5V supply tolerates automotive 5V regulated rails with margin. Used with the internal 8MHz RC oscillator, the MCU needs no external crystal for non-timing-critical nodes, reducing BOM cost. Developers should use brown-out detection enabled at ~2.7V to protect EEPROM integrity during crank transients.
推荐
Industrial Control and Instrumentation
In industrial control panels and small instrumentation, the ATMEGA168-15AT1 provides deterministic single-cycle instruction execution approaching 1 MIPS per MHz, which simplifies timing analysis for control loops. The 10-bit ADC with 8 multiplexed channels and differential mode reads up to eight analog process signals, while six PWM channels drive actuators, heaters, or proportional valves. The USART links to RS-485 transceivers for Modbus RTU networks, and the I2C-compatible TWI interfaces EEPROM or RTC chips. The -15AT1 industrial temperature rating survives panel enclosures at +105C. Designers commonly pair it with optocoupler-isolated inputs to meet industrial isolation requirements.
推荐
Consumer Embedded Systems
The ATMEGA168-15AT1 is a cost-effective controller for consumer appliances, keyboards, chargers, and small appliances where 16KB of FLASH covers full application firmware plus bootloaders. Its wide 2.7V to 5.5V supply supports two-cell battery operation and 5V USB-adjacent designs. Single-cycle RISC execution keeps interrupt latency predictable for button scanning and encoder inputs, and the pin-change interrupts on all port pins enable low-power wake-up. In production, ICSP allows firmware updates through a two-pin interface using the reset line, so unprogrammed devices can be flashed on the assembled board. The internal RC oscillator eliminates crystal cost for non-timing-critical consumer functions.
推荐
Battery-Powered and Low-Power Devices
For battery-powered meters, remote controls, and dataloggers, the ATMEGA168-15AT1 offers multiple sleep modes including power-down, in which current drops to microamp levels while pin-change interrupts remain armed for wake-up. Running from 2.7V to 5.5V, it operates directly from two or three alkaline cells without a regulator in many designs. The internal 128kHz RC oscillator option supports low-speed, low-power processing tasks, while the ADC noise-canceler sleep mode improves analog measurement accuracy between conversions. Combining power-down sleep with watchdog-timed wake-ups yields multi-year battery life. Designers should disable unused peripheral clocks via the power-reduction registers to minimize average draw.
推荐
Motor Control and PWM Actuation
The ATMEGA168-15AT1 drives small DC and stepper motors through its six PWM channels, including two high-speed 8-bit PWM outputs (OC0A/OC0B) and two 16-bit PWM outputs (OC1A/OC1B) suitable for servo and fan control with 16-bit duty resolution. The dead-time-capable timer1 outputs can drive half-bridge gate drivers for brushed-DC H-bridges. The analog comparator with internal bandgap reference enables overcurrent or stall detection without an external comparator. At 16MHz, PWM frequencies up to 62.5kHz are achievable on 8-bit timers, placing switching above audible range. Always pair the MCU with adequate freewheeling diodes and gate-driver ICs for inductive loads.
推荐
Hobby, Education, and Prototyping
The ATmega168 family underpins the classic Arduino ecosystem, making the ATMEGA168-15AT1 attractive for educational platforms and hobby products derived from Arduino-compatible designs. ICSP programming works with the MPLAB Snap, AVRISP mkII, or USBasp programmers through the two-pin plus reset interface, and the 32 general-purpose working registers make assembly teaching straightforward. The 16MHz crystal-based reference gives consistent UART timing for serial debugging, while the 10-bit ADC supports analog sensor labs. Because the ATMEGA328P-AU is pin-compatible with double the memory, prototypes can migrate upward without PCB changes when firmware outgrows 16KB, protecting layout investment during course or product iteration.
推荐
推荐产品汇总
工程参考数据： ATMEGA168-15AT1 ——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 | ATMEGA168PA-AU | ATMEGA168A-AU | ATMEGA328P-AU | ATMEGA88-15AT1 | ATMEGA48-15AT |
|---|---|---|---|---|---|---|
| Package | 32-TQFP (7x7 mm) | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology (Atmel) | Microchip Technology (Atmel) |
| 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 Speed | 16 MHz | 20 MHz | 20 MHz | 20 MHz | 16 MHz | 16 MHz |
| Supply Voltage | 2.7 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Operating Temperature | -40C to +105C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +105C | -40C to +105C |
关键差异点
- Extended +105C automotive temperature range （对比 ATMEGA168A-AU)
- Pin-compatible upgrade to 32KB FLASH （对比 ATMEGA328P-AU)
- Cost optimization path within same footprint （对比 ATMEGA88-15AT1)
设计说明
Connect VCC (pins 4, 6) and AVCC (pin 18) to the same 2.7V-5.5V rail, but decouple AVCC separately with a 100nF ceramic plus optional 10uH ferrite/inductor when ADC accuracy matters. AVCC must not lag VCC at power-up or the ADC port pins can latch up. Enable the 2.7V brown-out detector (BODLEVEL fuse) on automotive rails to protect EEPROM and FLASH during cold-crank voltage dips.
Place the 0.1uF decoupling capacitors within 2 mm of the VCC/GND pairs (pins 3-6) and route a solid ground plane under the TQFP-32. Keep the XTAL1/XTAL2 crystal (pins 7-8) traces under 10 mm with guard grounding, and keep the AREF node (pin 20) away from PWM and UART switching traces. Use the exposed-free TQFP 0.8 mm pitch land pattern per IPC-7351 but verify against the Microchip footprint before release.
PC6 (pin 29) is RESET by default - if it is reused as GPIO, ISP programming is disabled, a frequent lock-out mistake. Also note the 16MHz ceiling: ATmega168 cores are rated to 16MHz at 4.5-5.5V and lower speed at reduced VCC per the frequency-voltage curve; running 16MHz at 2.7V is out of spec. Check fuse settings (CLKDIV8, CKOUT) after programming - factory CKDIV8 halves the clock and confuses first-time bring-up.
合规信息
AEC-Q100 qualification and -40C to +105C rating confirmed via Microchip USA product listing. RoHS/REACH status for this specific ordering code was not stated in provided data; check the Microchip product page certificate of conformance.