ATMEGA128-16MN - 8-Bit AVR MCU 128KB 16MHz 64-QFN | Microchip
Référence : ATMEGA128-16MN ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $12.4 | $12,40 |
| 10 | $11.15 | $111,50 |
| 100 | $9.92 | $992,00 |
| 500 | $8.68 | $4 340,00 |
| 1 000 | $7.44 | $7 440,00 |
ATMEGA128-16MN Présentation
A microcontroller is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals such as timers, communication interfaces, and analog-to-digital converters. Within the embedded hierarchy, the ATmega128 belongs to the 8-bit AVR ATmega family, positioned under the broader categories of microcontroller units (MCUs), embedded processors, and integrated circuits. It executes most of its 131 powerful instructions in a single clock cycle, providing fully static operation.
Key features include an 8-channel 10-bit ADC for direct analog sensor interfacing, a JTAG interface for on-chip debugging and boundary-scan, two hardware USARTs for serial communication, plus SPI and TWI (I2C) buses. The four flexible timers (two 8-bit, two 16-bit with PWM) support motor control, lighting, and waveform generation. In-system programmable FLASH allows firmware updates without removing the device from the board.
Architecturally, the AVR uses an advanced Harvard structure with separate program and data buses and 32 general-purpose working registers directly connected to the ALU, achieving one-cycle instruction execution. The optional external memory interface can expand addressing for larger applications.
Typical applications include industrial automation and control panels, building and HVAC controllers, embedded instrumentation, and motor control systems that require 5V noise immunity, generous 128 KB code space, and field-updatable firmware.
A key design consideration is power dissipation: at 5V/16 MHz the device draws more current than its 8 MHz low-voltage siblings, so active clock management (idle, power-down modes) should be used in battery-sensitive designs. The QFN pad geometry requires an exposed-land PCB footprint.
This page synthesizes distributor pricing, drop-in alternatives, cross-reference findings, and practical design notes not found in the manufacturer datasheet. Price data is as of 2026-09-15.
Alternatives de remplacement direct pour ATMEGA128-16MN — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ATMEGA128-16MN (même facteur de forme et même empreinte) — différant par Package, Timers, Communication Interfaces, Throughput, Instruction Set.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ATMEGA128-16MU
✅ Remplacement direct✓ En stock
$6.4 / unité
Voir la fiche technique →ATMEGA128A-16MN
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ATMEGA1281-16MUR
✅ Remplacement direct✓ En stock
$8.78 / unité
Voir la fiche technique →ATMEGA128-16MN Valeurs maximales et caractéristiques électriques
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 16 MHz |
| Throughput | 16 MIPS (at 16 MHz) |
| Instruction Set | 131 powerful instructions, most single-cycle |
| Program Memory Type | FLASH |
| Program Memory Size | 128 KB (64K x 16) |
| RAM Size | 4 KB (4K x 8) |
| EEPROM Size | 4 KB |
| Voltage - Supply (Vcc/Vdd) | 4.5 V to 5.5 V |
| ADC | 8-channel 10-bit |
| JTAG Interface | Yes (on-chip debugging and boundary scan) |
| Communication Interfaces | 2x USART, SPI, TWI (I2C) |
| Timers | 2x 8-bit, 2x 16-bit with PWM |
| Supplier Device Package | 64-QFN (9x9) |
| Boîtier / Format | 64-QFN / MLF (9x9 mm) |
| Type de montage | Surface Mount |
| Series | AVR ATmega |
| Green / RoHS Grade | GREEN, 105C |
| Packaging | Tray |
| Product Status | Active |
Guide de configuration des broches du ATMEGA128-16MN 64-qfn / mlf (9x9 mm)
Configuration des broches du ATMEGA128-16MN (boîtier 64-qfn / mlf (9x9 mm)). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour ATMEGA128-16MN.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
ATMEGA128-16MN convient pour 6 applications: Industrial Automation and Control, Embedded Instrumentation and Data Acquisition, Building and HVAC Controllers, Motor Control and Actuation, Communication Nodes and Gateways, Consumer and 5V Legacy Equipment Maintenance.
Industrial Automation and Control
The ATMEGA128-16MN fits industrial controllers because its 4.5V-5.5V supply delivers the noise immunity that electrically harsh factory environments demand, while 128 KB FLASH holds substantial ladder-logic interpreters or protocol stacks. Two USARTs, SPI, and TWI (I2C) connect drives, HMIs, and I/O expansion without extra bridge chips, and the 8-channel 10-bit ADC reads analog transducers directly. In use, it typically runs a real-time control loop at 16 MHz (16 MIPS) while PWM timers drive actuators; the external memory interface scales RAM for data logging. Because the part is in-system programmable, field firmware updates avoid production-line downtime.
Recommandé
Embedded Instrumentation and Data Acquisition
For benchtop meters, environmental loggers, and test fixtures, the ATMEGA128-16MN's 8-channel 10-bit ADC digitizes multiple sensor inputs at up to ~15 kSPS (datasheet ADC clock scaling), and the 4 KB EEPROM preserves calibration tables across power cycles. The JTAG interface enables deep on-chip debugging during instrument firmware development, while two USARTs stream results to a host PC or printer. At 16 MHz the core sustains 16 MIPS, sufficient for filtering and scaling math in real time. Designers typically pair it with precision voltage references and use power-down mode between samples to cut consumption in portable instruments.
Recommandé
Building and HVAC Controllers
Thermostats, damper controllers, and boiler management boards benefit from the ATMEGA128-16MN's combination of a 5V-tolerant industrial supply, TWI (I2C) bus for connecting temperature/humidity sensors, and multiple PWM outputs for fan and valve control. The 128 KB FLASH accommodates complete PID control stacks, scheduling logic, and Modbus-style serial protocols on either USART. The GREEN 105C-grade MLF package suits enclosed controller PCBs. In application, the part idles between scheduler ticks using its power-management modes, and in-system programmability allows installers to load site-specific firmware without handling the chip.
Recommandé
Motor Control and Actuation
With two 8-bit and two 16-bit timers offering PWM generation and input capture, the ATMEGA128-16MN drives DC, stepper, and brushed-actuator power stages via gate-driver companions. The 16 MHz/5V core executes commutation and current-loop math at 16 MIPS, while the 10-bit ADC samples shunt-derived feedback on up to eight channels. Typical implementations use Timer1/Timer3 complementary PWM into gate drivers, with USART or SPI links to a supervisory controller. The external memory interface can buffer motion profiles, and JTAG debugging simplifies tuning of current-control firmware on the live motor.
Recommandé
Communication Nodes and Gateways
The ATMEGA128-16MN suits serial protocol converters, RS-485 field nodes, and small gateways: dual hardware USARTs let one port serve the field bus while the other talks to local peripherals, with hardware flow control available on the 5V-tolerant lines. 128 KB FLASH stores multiple protocol stacks simultaneously, and 4 KB SRAM buffers packet traffic; the TWI bus attaches RTCs and EEPROMs for configuration storage. At 16 MHz the core sustains 16 MIPS, comfortably handling CRC computation and framing in software. Power-down mode keeps duty-cycled wireless or wired nodes within modest energy budgets.
Recommandé
Consumer and 5V Legacy Equipment Maintenance
A large installed base of 5V AVR designs relies on the ATMEGA128-16MN for repair, refurbishment, and end-of-life maintenance of appliances, vending machines, and legacy controllers. Because the MN variant is the GREEN 105C-grade 64-QFN version, it substitutes into existing MLF footprints without PCB changes, and identical AVR instruction-set compatibility means original firmware images program and run unchanged. Maintenance engineers typically re-flash via SPI ISP headers already present on service boards. The 4.5V-5.5V supply range keeps it compatible with aging 5V power trees still used in these products.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATMEGA128-16MN — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATMEGA128-16MU | ATMEGA128A-16MN | ATMEGA1281-16MUR |
|---|---|---|---|---|
| Package | 64-QFN/MLF (9x9) | 64-QFN/MLF (9x9) - same | 64-QFN/MLF (9x9) - same | 64-QFN/MLF (9x9) - same |
| Brand | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) |
| Core / Clock | AVR 8-bit / 16 MHz | AVR 8-bit / 16 MHz | AVR 8-bit / 16 MHz | AVR 8-bit / 16 MHz |
| Flash Memory | 128 KB | 128 KB | 128 KB | 128 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 8 KB |
| EEPROM | 4 KB | 4 KB | 4 KB | 4 KB |
| Supply Voltage | 4.5 V - 5.5 V | 4.5 V - 5.5 V | 4.5 V - 5.5 V | 4.5 V - 5.5 V (16 MHz grade) |
| External Memory Interface | Yes | Yes | Yes | No |
| JTAG Debug | Yes | Yes | Yes | Yes |
| Firmware Compatibility | Baseline ATmega128 | Identical - true drop-in | Identical instruction set - drop-in (check errata) | Peripheral set differs - port required |
Principaux différenciateurs
- True drop-in legacy continuity (vs ATMEGA128A-16MN)
- External memory interface retained (vs ATMEGA1281-16MUR)
- GREEN 105C-grade MLF compliance (vs ATMEGA128-16MU)
Notes de conception
The 64-QFN/MLF (9x9 mm) package has a 0.5 mm pitch lead frame and a large central exposed pad that must be soldered to a grounded copper land for both mechanical retention and heat spreading. Use an NSMD pad pattern with via-in-pad or perimeter thermal vias (about 4x4 array) under the center pad. Note that MLF packages leave limited visual inspection area under the body, so plan for X-ray or electrical test coverage. The MLF footprint differs from the TQFP-64 land pattern of the AN variant, so footprints are not interchangeable across suffixes.
Estimated: at 5V/16 MHz active mode the ATmega128 draws on the order of 20-25 mA (per the datasheet active-current figure), giving roughly 100-125 mW core dissipation - small, but all VCC/GND pairs (multiple pins on this package) must each be decoupled with 100 nF ceramics placed within a few millimeters of the pins. AVCC should be isolated from the digital rail with an LC filter (ferrite plus 100 nF) to preserve the 10-bit ADC's effective resolution; a noisy AVCC can cost 2-3 LSB of accuracy.
Do not treat the MN (GREEN MLF) and AN (TQFP) suffixes as footprints interchangeable: the QFN leads sit under the body. Second, the ATmega128 external memory interface multiplexes address bits on port A - if XMEM is enabled, PA0-PA7 are consumed and cannot serve as GPIO, a frequent bring-up surprise. Third, when substituting ATMEGA1281-16MUR, register maps and pin multiplexing differ despite the same 128 KB FLASH, so firmware must be ported and retested. Finally, verify the JTAGEN fuse state; JTAG shares pins PF4-PF7 with the ADC.
On a 5V/16 MHz design, keep the XTAL1/XTAL2 crystal traces short (under 10 mm) with guard ground, and place the crystal load capacitors close to the pins. USART and SPI lines leaving the board benefit from series 22-33 ohm resistors to tame fast AVR edge rates and reduce EMI on unshielded cable runs. Because the QFN exposes a ground pad, a solid ground plane on layer 2 is straightforward and should be used as the return reference for all high-speed digital nets.
Informations de conformité
Verified web data identifies the MN suffix as GREEN, 105C grade (green/RoHS-oriented manufacturing), QFN/MLF package. REACH and conflict-minerals status not stated in provided data.
