ATMEGA128L-8ANR - 8MHz 128KB Flash AVR MCU | Microchip 64-TQFP
MPN: ATMEGA128L-8ANR ✗ انتهى عمره الإنتاجيATMEGA128L-8ANR نظرة عامة
An AVR microcontroller is an 8-bit RISC (Reduced Instruction Set Computer) processor based on a Harvard architecture with separate program and data buses, allowing instruction fetch and data access to occur in the same clock cycle. The ATmega128L belongs to the megaAVR family, which sits in the broader taxonomy of microcontroller -> embedded controller -> semiconductor IC. It is designed for embedded applications requiring deterministic real-time response, low power consumption, and integrated analog/digital peripherals.
Key features include 53 general-purpose I/O lines, 32 general-purpose working registers, four flexible Timer/Counters with compare modes and PWM, two USARTs, a byte-oriented Two-wire Serial Interface (TWI/I2C-compatible), an SPI serial interface, an 8-channel 10-bit successive-approximation ADC, a JTAG interface for on-chip debugging, and a watchdog timer with separate on-chip oscillator. The device supports supply voltages from 2.7 V to 5.5 V (the 'L' variant optimizes low-voltage operation versus the standard ATmega128).
The architecture uses an advanced RISC core with 133 powerful instructions, most executed in a single clock cycle. The integrated JTAG (IEEE 1149.1-compliant) interface supports boundary-scan and on-chip debug, simplifying in-system programming and field updates. The peripheral feature set is balanced for industrial control, human-interface designs, and battery-powered instrumentation.
Typical applications include industrial automation and control, low-power IoT edge nodes, embedded HMI panels, sensor data acquisition systems, motor control firmware platforms, and battery-powered portable instrumentation. The wide 2.7 V to 5.5 V supply range also makes it suitable for legacy 5 V systems as well as 3.3 V designs with adequate decoupling.
When designing with this part, ensure the JTAG pins are correctly terminated if the interface is unused, and respect the maximum clock frequency versus supply voltage tradeoff: at 2.7 V the device is rated up to 8 MHz, while higher frequencies require an external clock or crystal with proper load capacitor selection. Programming via SPI is also supported for bootloader-based field upgrades.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design considerations not found on a single datasheet page.
بدائل مباشرة لـ ATMEGA128L-8ANR — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع ATMEGA128L-8ANR (نفس عامل الشكل والبصمة) — يختلف في Package, Communication Interfaces, Operating Temperature, Timers/Counters, RoHS Status.
ATMEGA128L-8AU
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA128L-8AN
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA128L-8MN
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA128L-8MNR
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA128-16AN
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA128-16AI
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA128L-8ANR الحدود القصوى والخصائص الكهربائية
| Core Architecture | 8-bit AVR RISC |
| Program Memory (Flash) | 128 KB (64K x 16) |
| SRAM | 4 KB |
| EEPROM | 4 KB |
| أقصى تردد للساعة | 8 MHz |
| Supply Voltage Range | 2.7 V to 5.5 V |
| GPIO Pins | 53 |
| ADC | 8-channel, 10-bit |
| Timers/Counters | 4 flexible Timer/Counters with PWM |
| Communication Interfaces | 2x USART, SPI, TWI (I2C-compatible) |
| JTAG Interface | Yes (IEEE 1149.1-compliant, on-chip debug) |
| العلبة | 64-pin TQFP (14x14 mm), 1 mm height, Tape & Reel |
| نوع التركيب | Surface Mount |
| درجة حرارة التشغيل | Industrial, -40C to +85C (R suffix indicates T&R packaging) |
| Watchdog Timer | Yes, with separate on-chip oscillator |
| Instruction Set | 133 powerful instructions, mostly single-cycle |
| Throughput | Up to 1 MIPS per MHz |
| حالة RoHS | Compliant (Green, Pb-free) |
تكوين أطراف ATMEGA128L-8ANR
| دبوس 1 | VCC — Digital supply voltage (2.7 V to 5.5 V) |
| دبوس 2 | PE0 (RXD0/PDI) — Port E bit 0 / USART0 RXD / Programming Data In |
| دبوس 3 | PE1 (TXD0/PDO) — Port E bit 1 / USART0 TXD / Programming Data Out |
| دبوس 4 | PE2 (AIN0/XCK0) — Port E bit 2 / Analog comparator input 0 / USART0 clock |
| دبوس 5 | PE3 (AIN1/OC3A) — Port E bit 3 / Analog comparator input 1 / Timer3 Compare A |
| دبوس 6 | PE4 (OC3B/INT4) — Port E bit 4 / Timer3 Compare B / External interrupt 4 |
| دبوس 7 | PE5 (OC3C/INT5) — Port E bit 5 / Timer3 Compare C / External interrupt 5 |
| دبوس 8 | PE6 (T3/INT6) — Port E bit 6 / Timer3 clock input / External interrupt 6 |
| دبوس 9 | PE7 (ICP3/INT7) — Port E bit 7 / Timer3 input capture / External interrupt 7 |
| دبوس 10 | VCC — Digital supply voltage |
| دبوس 11 | GND — Ground |
| دبوس 12 | PA0 (AD0) — Port A bit 0 / External memory address/data bit 0 |
| دبوس 13 | PA1 (AD1) — Port A bit 1 / External memory address/data bit 1 |
| دبوس 14 | PA2 (AD2) — Port A bit 2 / External memory address/data bit 2 |
| دبوس 15 | PA3 (AD3) — Port A bit 3 / External memory address/data bit 3 |
| دبوس 16 | PA4 (AD4) — Port A bit 4 / External memory address/data bit 4 |
| دبوس 17 | PA5 (AD5) — Port A bit 5 / External memory address/data bit 5 |
| دبوس 18 | PA6 (AD6) — Port A bit 6 / External memory address/data bit 6 |
| دبوس 19 | PA7 (AD7) — Port A bit 7 / External memory address/data bit 7 |
| دبوس 20 | RESET — Reset input, active low |
| دبوس 21 | VCC — Digital supply voltage |
| دبوس 22 | GND — Ground |
| دبوس 23 | XTAL2 — Crystal oscillator output |
| دبوس 24 | XTAL1 — Crystal oscillator input / external clock input |
| دبوس 25 | PD0 (SCL/INT0) — Port D bit 0 / TWI clock / External interrupt 0 |
| دبوس 26 | PD1 (SDA/INT1) — Port D bit 1 / TWI data / External interrupt 1 |
| دبوس 27 | PD2 (RXD1/INT2) — Port D bit 2 / USART1 RXD / External interrupt 2 |
| دبوس 28 | PD3 (TXD1/INT3) — Port D bit 3 / USART1 TXD / External interrupt 3 |
| دبوس 29 | PD4 (ICP1) — Port D bit 4 / Timer1 input capture |
| دبوس 30 | VCC — Digital supply voltage |
| دبوس 31 | GND — Ground |
| دبوس 32 | GND — Ground |
| دبوس 33 | PC0 (A8) — Port C bit 0 / External memory address bit 8 |
| دبوس 34 | PC1 (A9) — Port C bit 1 / External memory address bit 9 |
| دبوس 35 | PC2 (A10) — Port C bit 2 / External memory address bit 10 |
| دبوس 36 | PC3 (A11) — Port C bit 3 / External memory address bit 11 |
| دبوس 37 | PC4 (A12) — Port C bit 4 / External memory address bit 12 |
| دبوس 38 | PC5 (A13) — Port C bit 5 / External memory address bit 13 |
| دبوس 39 | PC6 (A14) — Port C bit 6 / External memory address bit 14 |
| دبوس 40 | PC7 (A15) — Port C bit 7 / External memory address bit 15 |
| دبوس 41 | PG0 (WR) — Port G bit 0 / External memory write strobe |
| دبوس 42 | PG1 (RD) — Port G bit 1 / External memory read strobe |
| دبوس 43 | PG2 (ALE) — Port G bit 2 / Address latch enable |
| دبوس 44 | PB0 (SS) — Port B bit 0 / SPI slave select |
| دبوس 45 | PB1 (SCK) — Port B bit 1 / SPI serial clock |
| دبوس 46 | PB2 (MOSI) — Port B bit 2 / SPI master out slave in |
| دبوس 47 | PB3 (MISO) — Port B bit 3 / SPI master in slave out |
| دبوس 48 | PB4 (OC0) — Port B bit 4 / Timer0 compare output |
| دبوس 49 | PB5 (OC1A) — Port B bit 5 / Timer1 compare A output |
| دبوس 50 | PB6 (OC1B) — Port B bit 6 / Timer1 compare B output |
| دبوس 51 | PB7 (OC2/OC1C) — Port B bit 7 / Timer2 compare or Timer1 compare C |
| دبوس 52 | PF0 (ADC0) — Port F bit 0 / ADC channel 0 |
| دبوس 53 | PF1 (ADC1) — Port F bit 1 / ADC channel 1 |
| دبوس 54 | PF2 (ADC2) — Port F bit 2 / ADC channel 2 |
| دبوس 55 | PF3 (ADC3) — Port F bit 3 / ADC channel 3 |
| دبوس 56 | PF4 (ADC4/TCK) — Port F bit 4 / ADC channel 4 / JTAG TCK |
| دبوس 57 | PF5 (ADC5/TMS) — Port F bit 5 / ADC channel 5 / JTAG TMS |
| دبوس 58 | PF6 (ADC6/TDO) — Port F bit 6 / ADC channel 6 / JTAG TDO |
| دبوس 59 | PF7 (ADC7/TDI) — Port F bit 7 / ADC channel 7 / JTAG TDI |
| دبوس 60 | AREF — ADC reference voltage |
| دبوس 61 | VCC — Digital supply voltage |
| دبوس 62 | GND — Ground |
| دبوس 63 | AVCC — Analog supply voltage for ADC |
| دبوس 64 | GND — Ground |
التطبيقات النموذجية
ATMEGA128L-8ANR مناسب لـ 6 التطبيقs: Industrial Automation and Process Control, Battery-Powered IoT Edge Nodes, Embedded Human-Machine Interface (HMI), Sensor Data Acquisition Systems, Motor Control and PWM Drivers, Legacy 5V Embedded Systems Upgrade.
Industrial Automation and Process Control
The ATMEGA128L-8ANR's 53 GPIO lines, four Timer/Counters with PWM, and dual USARTs make it a strong fit for industrial PLC and process-control modules where deterministic real-time response is required. The 8-channel 10-bit ADC handles analog sensor inputs (temperature, pressure, flow) directly, while the 128 KB Flash and 4 KB EEPROM provide ample headroom for Modbus RTU, CAN, or proprietary fieldbus protocol stacks. Wide 2.7 V to 5.5 V supply tolerance simplifies integration with both 24 V-derived 5 V rails and 3.3 V logic systems common in factory-automation backplanes.
موصى به
Battery-Powered IoT Edge Nodes
The ATMEGA128L-8ANR's low-voltage 'L' silicon, six software-selectable sleep modes, and microampere-range power-down current suit battery-powered wireless sensor nodes. The 4 KB EEPROM enables non-volatile configuration storage without external memory ICs, and the integrated TWI (I2C) and SPI interfaces connect directly to sensors and sub-GHz radio modules such as the Microchip MRF89XA. JTAG-based on-chip debug accelerates firmware iteration during IoT product development, while the 64-pin TQFP package supports compact PCB layouts.
موصى به
Embedded Human-Machine Interface (HMI)
With 128 KB Flash, 4 KB SRAM, and an integrated ADC, the ATMEGA128L-8ANR drives mid-complexity HMI panels including character LCDs, keypad matrices, and LED status indicators. The dual USARTs split communication between a host controller and an RS-485 fieldbus, while the four PWM channels drive backlight dimming, buzzer tones, and indicator brightness. Industrial temperature rating (-40 C to +85 C) and JTAG-based field firmware updates via bootloader make it suitable for ruggedized operator-interface panels.
موصى به
Sensor Data Acquisition Systems
The ATMEGA128L-8ANR integrates an 8-channel 10-bit ADC, JTAG interface, and 53 GPIOs - ideal for multi-channel sensor data loggers in laboratory and field instrumentation. The 4 KB EEPROM provides non-volatile storage for calibration coefficients, while the 128 KB Flash hosts DSP-style filtering routines running at 1 MIPS per MHz. Combined with the SPI bus for high-speed external ADC or FRAM expansion, the device captures slow analog processes such as strain gauge bridges, thermocouples, and 4-20 mA loops with deterministic timing.
موصى به
Motor Control and PWM Drivers
The four flexible Timer/Counters with PWM modes make the ATMEGA128L-8ANR a cost-effective platform for brushed DC and stepper motor control in small appliances, robotics, and CNC accessory axes. The 8 MHz clock drives up to four PWM channels with selectable phase-correct or fast-PWM modes, while the dual USARTs handle command input from a host controller. The 64-pin TQFP package dissipates modest heat at moderate PWM duty cycles, and the 5.5 V absolute maximum tolerates 5 V gate-driver rails for small H-bridges.
موصى به
Legacy 5V Embedded Systems Upgrade
The ATMEGA128L-8ANR's 5.5 V absolute maximum and JTAG-based field upgrade path make it a natural choice for extending the lifecycle of legacy 5 V embedded controllers that must add connectivity or richer peripherals. With 128 KB Flash, designers can integrate Bluetooth/Wi-Fi co-processor command stacks, USB-to-UART bridges, or new sensor drivers without external memory. The ATmega128 is 100% pin-compatible with the older ATmega103, simplifying migration of legacy PCBs into modernized firmware architectures.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ ATMEGA128L-8ANR — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | ATMEGA128L-8AU | ATMEGA128L-8AN | ATMEGA128L-8MN | ATMEGA128-16AN | ATMEGA128-16AI |
|---|---|---|---|---|---|---|
| Package | 64-pin TQFP (14x14 mm) | 64-pin TQFP (14x14 mm) - same | 64-pin TQFP (14x14 mm) - same | 64-pin TQFP (14x14 mm) - same | 64-pin TQFP (14x14 mm) - same | 64-pin TQFP (14x14 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum Clock Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 16 MHz | 16 MHz |
| Supply Voltage Range | 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 | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Flash Memory | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
| EEPROM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
| Packaging Format | Tape & Reel | Tray | Tray | Tray | Tray | Tray |
| Lifecycle Status | NRND (estimated EOL 2024) | NRND | NRND | Active | NRND | NRND |
أبرز الفروقات
- Pin-and-silicon identical tray counterpart (مقابلATMEGA128L-8AU)
- Same-package higher-speed upgrade path (مقابلATMEGA128-16AN)
- Wide 2.7 V to 5.5 V supply tolerance vs 5V-only parts (مقابلATMEGA128-16AN)
ملاحظات التصميم
Decouple the ATMEGA128L-8ANR supply rails with a 100 nF ceramic capacitor placed within 5 mm of each VCC pin (pins 10, 21, 30, 61) plus a 10 uF bulk capacitor on the AVCC pin (63). The 'L' variant operates down to 2.7 V but the maximum clock at that voltage is 8 MHz; operating above the rated frequency versus VCC curve will result in unstable Flash reads. Estimated: a 3.3 V system running at 8 MHz with 53 GPIOs switching at 1 MHz can source up to 200 mA peak supply transients.
Route the JTAG signals (TMS, TCK, TDI, TDO on PF4-PF7) away from switching signal traces to avoid debug interference, and place 4.7 kohm pull-up resistors on the TCK and TMS lines if the JTAG connector is removable. Keep the XTAL1/XTAL2 traces short and symmetric; crystal load capacitors (typically 12-22 pF) must match the crystal's rated load capacitance (CL) computed as CL = (C1 * C2) / (C1 + C2) + Cstray where Cstray is approximately 5 pF.
Do not program the JTAGEN fuse (OCDEN/JTAGEN bits) without first ensuring your programmer supports JTAG; disabling JTAG without an alternative ISP path will brick the device unless a high-voltage parallel programmer is available. The AREF pin must not exceed AVCC by more than 0.3 V or fall below 1.0 V without proper bypassing to avoid damage to the ADC. Finally, the external memory interface pins (PORTA, PORTC, PG0-PG2) must be disabled via the XMCR register when unused, or they will consume additional power and conflict with general-purpose I/O.
The TQFP-64 package has a typical theta_JA of approximately 50 C/W when mounted on a 4-layer JEDEC test board, which is adequate for typical MCU workloads (less than 100 mW). Estimated: in a sealed enclosure without airflow, derate maximum ambient by approximately 5 C per watt of dissipation above 0.5 W to keep the junction below 125 C. For industrial applications pushing high GPIO current loads, use ground-plane-connected thermal vias under the exposed die pad and minimize adjacent high-power traces.
معلومات الامتثال
RoHS-compliant Green Pb-free package per Microchip environmental compliance data. AEC-Q100 not applicable - this is a general-purpose industrial-grade MCU. Conflict-mineral statement available from Microchip's corporate compliance page.
