ATMEGA168PA-AUR - 8-bit AVR MCU 20MHz 16KB Flash TQFP-32 | Microchip
부품 번호: ATMEGA168PA-AUR ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $2.58 | $2.58 |
| 10 | $2.33 | $23.30 |
| 100 | $2.16 | $216.00 |
| 500 | $1.98 | $990.00 |
| 1,000 | $1.85 | $1,850.00 |
ATMEGA168PA-AUR 개요
An 8-bit AVR microcontroller is a single-chip computer built around an advanced RISC architecture; in the wider system hierarchy it belongs to the MCU category under Integrated Circuits, sitting above discrete logic but below 32-bit application processors. ATmega-family MCUs execute most instructions in a single clock cycle and integrate program memory, data memory, and peripherals on one die, making them a mainstay of embedded control.
Key features include the picoPower technology suite for microamp-level sleep currents, 23 general-purpose I/O lines, 32 general-purpose working registers, and three flexible timer/counters with compare modes. Peripherals include a serial programmable USART, a byte-oriented Two-Wire (I2C-compatible) interface, an SPI serial port, a 10-bit ADC with 8 single-ended channels (6 differential with programmable gain), and an internal calibrated RC oscillator, eliminating the need for an external crystal in many designs.
Technically, the ATmega168PA combines 131 mostly single-cycle instructions with hardware multipliers, four power-saving modes (idle, ADC noise reduction, power-save, and power-down), brown-out detection, an on-chip debug interface, and in-system programmability via SPI. The PA variant extends the supply range down to 1.8 V with picoPower refinements over the original ATmega168, allowing direct operation from two alkaline cells or a single Li-ion cell with a regulator.
Typical applications include battery-powered sensor nodes, industrial control panels, HVAC and appliance control, and Arduino-compatible hobby and prototyping boards (the Arduino Nano platform classically uses this 32-TQFP footprint).
For design, remember that maximum clock frequency scales with supply voltage: 20 MHz requires 4.5-5.5 V, while operation at 1.8 V limits the safe clock to roughly 4 MHz per the datasheet frequency-voltage curve.
This page synthesizes distributor pricing, verified drop-in alternatives, a complete TQFP-32 pinout, and practical design notes not consolidated in the manufacturer datasheet.
드롭인 대체품: ATMEGA168PA-AUR — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: ATMEGA168PA-AUR (동일 폼 팩터 및 풋프린트) — 차이점: Package, ADC Resolution, EEPROM, Communication Interfaces, SRAM.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
ATMEGA168A-AUR
✅ 드롭인✓ 재고 있음
$1.45 / 개
데이터시트 보기 →ATMEGA168P-20AU
✅ 드롭인✓ 재고 있음
$2.91 / 개
데이터시트 보기 →ATMEGA168-20AUR
✅ 드롭인✓ 재고 있음
$2.76 / 개
데이터시트 보기 →ATMEGA168PA-ANR
✅ 드롭인✓ 재고 있음
$1.44 / 개
데이터시트 보기 →ATMEGA328P-AUR
✅ 드롭인✓ 재고 있음
$2.18 / 개
데이터시트 보기 →ATMEGA88PA-AUR
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$0.82 / 개
데이터시트 보기 →ATMEGA168PA-AUR 최대 정격 & 전기적 특성
| Core Processor | AVR 8-bit RISC |
| Core Size | 8-Bit |
| 최대 클록 주파수 | 20 MHz |
| Flash Memory Size | 16 KB (8K x 16) |
| SRAM Size | 1 KB |
| EEPROM Size | 512 B |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Number of I/O | 23 |
| Timers/Counters | 3 (two 8-bit, one 16-bit) |
| ADC Resolution | 10 bit, 8 channels (6 differential) |
| Communication Interfaces | USART, SPI, I2C (Two-Wire) |
| 동작 온도 | -40C to +85C |
| 패키지 | 32-TQFP (7 x 7 mm) |
| 실장 유형 | Surface Mount |
| Packaging | Tape & Reel |
| RoHS 상태 | Compliant |
| Low Power Technology | picoPower |
| Internal Oscillator | Calibrated RC, 0.128 MHz to 8 MHz |
ATMEGA168PA-AUR 핀 구성
| 핀 1 | PD3 — Port D bit 3 (INT1 / OC2B / PCINT19) |
| 핀 2 | PD4 — Port D bit 4 (XCK / T0 / PCINT20) |
| 핀 3 | GND — Ground |
| 핀 4 | VCC — Digital supply voltage |
| 핀 5 | GND — Ground |
| 핀 6 | VCC — Digital supply voltage |
| 핀 7 | PB6 — Port B bit 6 (XTAL1 / TOSC1 / PCINT6) |
| 핀 8 | PB7 — Port B bit 7 (XTAL2 / TOSC2 / PCINT7) |
| 핀 9 | PD5 — Port D bit 5 (T1 / OC0B / PCINT21) |
| 핀 10 | PD6 — Port D bit 6 (AIN0 / OC0A / PCINT22) |
| 핀 11 | PD7 — Port D bit 7 (AIN1 / PCINT23) |
| 핀 12 | PB0 — Port B bit 0 (ICP1 / CLKO / PCINT0) |
| 핀 13 | PB1 — Port B bit 1 (OC1A / PCINT1) |
| 핀 14 | PB2 — Port B bit 2 (SS / OC1B / PCINT2) |
| 핀 15 | PB3 — Port B bit 3 (MOSI / OC2A / PCINT3) |
| 핀 16 | PB4 — Port B bit 4 (MISO / PCINT4) |
| 핀 17 | PB5 — Port B bit 5 (SCK / PCINT5) |
| 핀 18 | AVCC — Analog supply voltage for ADC |
| 핀 19 | ADC6 — Analog input channel 6 |
| 핀 20 | AREF — Analog reference voltage for ADC |
| 핀 21 | GND — Ground |
| 핀 22 | ADC7 — Analog input channel 7 |
| 핀 23 | PC0 — Port C bit 0 (ADC8 / PCINT8) |
| 핀 24 | PC1 — Port C bit 1 (ADC9 / PCINT9) |
| 핀 25 | PC2 — Port C bit 2 (ADC10 / PCINT10) |
| 핀 26 | PC3 — Port C bit 3 (ADC11 / PCINT11) |
| 핀 27 | PC4 — Port C bit 4 (ADC12 / SDA / PCINT12) |
| 핀 28 | PC5 — Port C bit 5 (ADC13 / SCL / PCINT13) |
| 핀 29 | PC6 — RESET (active-low reset input) |
| 핀 30 | PD0 — Port D bit 0 (RXD / PCINT16) |
| 핀 31 | PD1 — Port D bit 1 (TXD / PCINT17) |
| 핀 32 | PD2 — Port D bit 2 (INT0 / PCINT18) |
일반적인 애플리케이션
ATMEGA168PA-AUR 적합 용도: 6 애플리케이션s: Battery-Powered Sensor Nodes, Industrial Control Panels, HVAC and Appliance Control, Arduino-Compatible Prototyping Boards, Remote Controls and Handheld Devices, LED Lighting and Dimming Control.
Battery-Powered Sensor Nodes
The ATMEGA168PA-AUR fits battery-powered sensor nodes because its picoPower technology delivers microamp-level power-down sleep current and operation from 1.8 V, allowing direct use of two alkaline cells without a boost converter. A typical node wakes via pin-change interrupt on an accelerometer, samples with the internal 10-bit ADC or an external SPI sensor, and transmits over USART or RF - all handled by on-chip peripherals while the CPU sleeps. Spending 99% of the duty cycle in power-down at roughly 1 uA versus several mA active current extends coin-cell or AA-battery life from weeks to years. The internal 8 MHz RC oscillator also removes the quiescent cost of an external crystal in low-precision timing roles.
추천
Industrial Control Panels
In industrial control panels, the ATMEGA168PA-AUR provides deterministic 8-bit control across the -40C to +85C industrial temperature range, with brown-out detection and a watchdog timer protecting against supply disturbances common on factory floors. Its 23 GPIO lines with internal pull-ups drive relays, contactors, and status LEDs directly, while the USART connects to Modbus RTU links and the I2C bus reads rotary encoders or EEPROM parameter stores. The 10-bit ADC supervises analog setpoints and supply rails with six differential channels. Running at 16 MHz from a 5 V industrial rail leaves voltage headroom within the 20 MHz/5.5 V envelope, and in-system programming via SPI allows field firmware updates without desoldering the MCU.
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HVAC and Appliance Control
Home appliances and HVAC controllers benefit from the ATMEGA168PA-AUR's combination of cost (under $2.60 in single units), 16 KB of code space for state machines and menu-driven UIs, and robust on-chip peripherals. Three timer/counters generate phase-correct PWM for fan speed control and heater tripper control, the ADC reads NTC thermistors through differential channels, and the Two-Wire interface manages user-interface expanders. The 1 KB SRAM comfortably supports multi-language display buffers on character LCDs. picoPower sleep modes let standby appliances meet energy-star style quiescent budgets, dropping to microamps between button presses while retaining RAM state for instant resume.
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Arduino-Compatible Prototyping Boards
The ATMEGA168PA-AUR is the classic engine of Arduino-class prototyping boards such as the Arduino Nano, which use this exact 32-TQFP footprint. Full toolchain support - Arduino IDE, AVR-GCC, avrdude, and ISP programming over SPI (MOSI/MISO/SCK/RESET) - makes firmware development immediate, and the identical footprint to the ATMEGA328P-AUR lets a single PCB accept either part, upgrading to 32 KB Flash by reflow alone. The 20 MHz core executes most AVR instructions in one cycle, the hardware USART bridges to USB-serial bridges for sketch upload and debugging, and 23 GPIO with PWM and analog inputs cover shields, sensors, and actuators typical of maker projects.
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Remote Controls and Handheld Devices
Handheld and remote-control products exploit the ATMEGA168PA-AUR's lowest-power profile: pin-change interrupts wake the device on any of the 23 GPIO lines, so a keypress brings the MCU out of power-down in microseconds while total standby drain stays near 1 uA. A single CR2032 cell (3 V) sits comfortably inside the 1.8-5.5 V supply range, driving the internal 1 MHz or 8 MHz oscillator without a crystal. The ADC reads battery voltage for low-battery indication, IR emitters are driven by timer PWM for precise 38 kHz carrier generation, and the 512 B EEPROM stores paired-device IDs across battery changes.
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LED Lighting and Dimming Control
The ATMEGA168PA-AUR generates precise LED dimming control using its three timer/counters: the 16-bit Timer1 produces phase- and frequency-correct PWM at up to 16-bit resolution, eliminating visible flicker at low dimming levels, while Timer0/Timer2 drive secondary channels or fan cooling. The 10-bit ADC monitors potentiometer or 0-10 V dimmer inputs and current-sense resistors for closed-loop brightness regulation. picoPower sleep modes support occupancy-sensing luminaires that must meet near-zero standby draw, waking on PIR sensor interrupts in microseconds. With 16 KB of Flash, DMX512 receivers or DALI slave stacks fit alongside the dimming engine, all in a sub-$2.60 TQFP-32 device.
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추천 제품 요약
엔지니어링 참조 데이터: ATMEGA168PA-AUR — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | ATMEGA168A-AUR | ATMEGA168P-20AU | ATMEGA168-20AUR | ATMEGA328P-AUR | ATMEGA88PA-AUR |
|---|---|---|---|---|---|---|
| Package | 32-TQFP (7 x 7 mm) | 32-TQFP (7 x 7 mm) - same | 32-TQFP (7 x 7 mm) - same | 32-TQFP (7 x 7 mm) - same | 32-TQFP (7 x 7 mm) - same | 32-TQFP (7 x 7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB | 32 KB (+100%) | 8 KB (-50%) |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 2 KB (+100%) | 512 B (-50%) |
| EEPROM | 512 B | 512 B | 512 B | 512 B | 1 KB (+100%) | 512 B |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| RoHS Compliance | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
주요 차별점
- picoPower technology with 1.8 V minimum supply (vs ATMEGA168A-AUR)
- Cost-neutral memory upgrade path (vs ATMEGA328P-AUR)
- Active picoPower generation vs legacy silicon (vs ATMEGA168-20AUR)
- Memory headroom over smaller family members (vs ATMEGA88PA-AUR)
설계 노트
Respect the frequency-voltage derating curve: 20 MHz operation is only valid at 4.5-5.5 V; at 3.3 V the safe maximum is approximately 13.3 MHz (commonly run at 8-12 MHz with a crystal), and at 1.8 V only about 4 MHz. Exceeding the curve can cause corrupted execution. For battery designs, use the internal calibrated RC oscillator (1 MHz or 8 MHz) when precision timing is not required, and enable the brown-out detector at a threshold below your minimum valid supply so the MCU halts cleanly as the battery discharges.
Place 100 nF ceramic decoupling capacitors directly at VCC (pins 4 and 6) and AVCC (pin 18) with short returns to the adjacent GND pins (3, 5, 21). AVCC must be connected to VCC even if the ADC is unused - tie it through a low-pass LC filter (10 uH + 10 uF) when ADC noise matters. AREF requires a 100 nF capacitor to GND; never leave it floating when the internal reference is selected. RESET (pin 29) should have a 10 kohm pull-up; enable the SPI programming pins (PB3-PB5) routing so an ISP header remains accessible.
Fuse-bit misconfiguration is the most common field failure: disabling the external reset or setting an invalid clock source can brick the part, requiring a 12 V high-voltage parallel programmer for recovery. Verify fuses with an online calculator before burning. Also note debugWIRE shares the RESET pin - disabling DWEN via ISP is a one-way operation until HV programming is used. When migrating code from ATMEGA88PA, check that flash-resident string tables fit; the linker will silently place them in RAM otherwise, exhausting the 1 KB SRAM.
Estimated: in power-down mode with watchdog disabled, the datasheet lists sleep current in the sub-uA range for the picoPower PA variant. For a 3 V CR2032 (approx. 220 mAh) application waking 100 times per hour for 2 ms of active work at 3 mA, average current is approximately 1.7 uA sleep plus ~0.17 uA active duty contribution, giving over 5 years theoretical battery life. Confirm exact figures against the current datasheet, as picoPower specifications vary by voltage and fuse settings.
규정 준수 정보
RoHS compliant per DigiKey and LCSC listings; the -AUR suffix denotes the RoHS-compliant TQFP tape-and-reel configuration. REACH, halogen-free, and conflict-minerals status not stated in provided data.