ATMEGA640V-8AUR - 8-bit AVR MCU 64KB Flash 8MHz TQFP-100 | Microchip
Référence : ATMEGA640V-8AUR ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $11.75 | $11,75 |
| 10 | $11.3 | $113,00 |
| 100 | $10.85 | $1 085,00 |
| 500 | $10.4 | $5 200,00 |
| 1 000 | $9.95 | $9 950,00 |
| 3 000 | $9.6 | $28 800,00 |
ATMEGA640V-8AUR Présentation
An 8-bit AVR microcontroller is a Harvard-architecture RISC processor in which Flash program memory, SRAM data memory, and EEPROM non-volatile storage are addressed on separate buses. Within the semiconductor hierarchy, the ATmega640 sits in the AVR ATmega family, under general-purpose microcontrollers, under embedded processors. In a complete system it acts as the central control element, reading sensors, driving actuators, and managing communication interfaces.
Key features include 86 general-purpose I/O lines, 32 general-purpose working registers directly connected to the ALU for single-cycle execution, and six flexible timer/counters with output-compare and PWM channels. The device integrates an 8/16-channel 10-bit ADC, up to four programmable USARTs, master/slave SPI, a byte-oriented two-wire serial interface (TWI/I2C), a programmable watchdog timer with a separate on-chip oscillator, an on-chip analog comparator, and interrupt and wake-up on pin change.
The AVR core achieves throughputs close to 1 MIPS per MHz, so at 8 MHz the ATMEGA640V-8AUR delivers roughly 8 MIPS while consuming very little power, which is why the V-grade (1.8 V to 5.5 V) part is favored in battery-powered and low-voltage industrial designs. In-System Programming via SPI and support for in-circuit debugging with tools such as MPLAB SNAP simplify manufacturing and field updates.
Typical applications include industrial automation controllers, building automation and HVAC systems, battery-powered instrumentation, motor control panels, and multi-channel sensor acquisition nodes that need the 100-pin TQFP I/O count.
Design-wise, remember the 8 MHz maximum clock for the V-grade part: do not substitute a faster grade at reduced voltage without checking the frequency-versus-voltage curve in the manufacturer datasheet. Decouple VCC and AVCC with 100 nF ceramics placed close to the pins.
This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet, with pricing as of 2026-09-18.
Alternatives de remplacement direct pour ATMEGA640V-8AUR — 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 ATMEGA640V-8AUR (même facteur de forme et même empreinte) — différant par Package, RoHS Status, SRAM, ADC, EEPROM.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ATMEGA640V-8AU
✅ Remplacement direct✓ En stock
$3.95 / unité
Voir la fiche technique →ATMEGA640-16AUR
✅ Remplacement direct✓ En stock
$6.2 / unité
Voir la fiche technique →ATMEGA640-16CUR
✅ Remplacement direct✓ En stock
$6.72 / unité
Voir la fiche technique →ATMEGA1280V-8AUR
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ATMEGA2560V-8AUR
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ATMEGA6450V-8AUR
✅ Remplacement direct✓ En stock
$6.41 / unité
Voir la fiche technique →ATMEGA640V-8AUR Valeurs maximales et caractéristiques électriques
| Core Processor | AVR 8-bit RISC |
| Core Size | 8-bit |
| Fréquence d'horloge maximale | 8 MHz |
| Flash Memory Size | 64 KB (32K x 16) |
| SRAM Size | 8 KB |
| EEPROM Size | 4 KB |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Number of I/O | 86 |
| Boîtier | 100-TQFP (14 x 14 mm) |
| ADC Resolution | 10-bit |
| ADC Channels | 8/16 |
| USART | 2/4 programmable serial USART |
| Connectivity | EBI/EMI, I2C (TWI), SPI, UART/USART |
| Timers/Counters | Six flexible timer/counters |
| General Purpose Working Registers | 32 |
| Type de montage | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Watchdog Timer | Programmable, separate on-chip oscillator |
| Analog Comparator | On-chip |
| Statut RoHS | Compliant (GREEN per FindIC listing) |
Guide de configuration des broches du ATMEGA640V-8AUR 100-tqfp (14 x 14 mm)
Configuration des broches du ATMEGA640V-8AUR (boîtier 100-tqfp (14 x 14 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 ATMEGA640V-8AUR.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
ATMEGA640V-8AUR convient pour 6 applications: Industrial Automation Controllers, Battery-Powered Instrumentation, Building Automation and HVAC, Multi-Channel Sensor Acquisition, Motor Control Panels, Embedded Networking Nodes.
Industrial Automation Controllers
In factory automation, PLC-style controllers need many discrete I/O points, multiple serial links, and deterministic interrupt handling - exactly what the ATMEGA640V-8AUR delivers. Its 86 general-purpose I/O lines drive relays, solenoids, and optocoupler inputs, while up to four USARTs handle RS-485/Modbus fieldbus channels simultaneously. The external bus interface (EBI/EMI) allows memory-mapped expansion for additional latches or displays, and six timer/counters generate PWM for motor drives with output-compare precision. The watchdog timer with its separate on-chip oscillator recovers the system autonomously after a firmware lockup, a requirement in unattended equipment. Running at 8 MHz the core delivers about 8 MIPS, sufficient for scan-cycle logic, and operation from 1.8 V to 5.5 V in the -40 C to +85 C industrial temperature range keeps the design robust across plant conditions.
Recommandé
Battery-Powered Instrumentation
Portable instruments benefit from the V-grade 1.8 V to 5.5 V operating range of the ATMEGA640V-8AUR, which allows direct operation from a single lithium cell or two NiMH cells through the lower end of its supply curve. The AVR core's near-1 MIPS-per-MHz efficiency means the 8 MHz clock can be reduced in software during idle periods, cutting active current proportionally, while pin-change interrupt wake-up brings the MCU out of sleep only when a button or sensor event occurs. The integrated 10-bit ADC with 8/16 channels digitizes sensor arrays without an external converter, and 4 KB EEPROM stores calibration constants across battery replacements. With 64 KB Flash there is room for logging firmware and USB-serial update bootloaders, and the 100-pin TQFP offers enough I/O for LCD, keypad, and communication peripherals on a single controller.
Recommandé
Building Automation and HVAC
HVAC controllers and building automation nodes require robust multi-drop communication, precise timing, and long-term reliability. The ATMEGA640V-8AUR provides up to four programmable USARTs that can drive several independent RS-485 buses or BACnet-style serial links, plus a byte-oriented two-wire interface (TWI/I2C) for connecting humidity, temperature, and pressure sensors on the board. Its six timer/counters with output-compare modulator generate staged PWM for fan and damper actuators, and the 10-bit ADC reads thermistor networks and 0-10 V-conditioned analog inputs. The programmable watchdog with a separate on-chip oscillator guarantees restart after transient faults, and the 86 general-purpose I/O lines interface contactors, valves, and status LEDs directly. Wide 1.8 V to 5.5 V tolerance simplifies power design across mains-backed and battery-backed zones.
Recommandé
Multi-Channel Sensor Acquisition
Data-acquisition front ends use the ATMEGA640V-8AUR's 8/16-channel 10-bit ADC to scan large sensor arrays, while its 8 KB SRAM buffers sample blocks before streaming over SPI or USART to a host. Timer-triggered ADC conversions give deterministic sampling intervals, and the on-chip analog comparator can act as a fast threshold detector independent of the software loop. The external bus interface (EBI/EMI) attaches external SRAM or memory-mapped converters when the internal 8 KB SRAM is insufficient, and 4 KB EEPROM retains calibration tables and channel offsets through power cycles. The 100-pin TQFP package's 86 I/O lines control multiplexers, gain stages, and per-channel status indicators. Wide 1.8 V to 5.5 V operation allows interfacing directly with both low-voltage MEMS sensors and 5 V industrial transmitters without level shifters on the analog domain.
Recommandé
Motor Control Panels
In motor control and actuator panels, the ATMEGA640V-8AUR generates up to six channels of PWM via its flexible timer/counters, supporting multi-axis or multi-pump designs from one controller. The output-compare modulator provides hardware-assisted PWM generation with minimal CPU load, freeing the 8 MIPS AVR core to run commutation sequencing, fault monitoring, and communication. Its 10-bit ADC reads current-sense shunts and back-EMF feedback, while the analog comparator enables cycle-by-cycle current limiting. Up to four USARTs connect drives to supervisory SCADA networks, and 86 general-purpose I/O lines handle enable lines, limit switches, and brake relays. The industrial -40 C to +85 C temperature rating and watchdog timer with separate oscillator meet the reliability expectations of continuous-duty motor panels operating from 1.8 V to 5.5 V logic supplies.
Recommandé
Embedded Networking Nodes
Gateway and protocol-conversion nodes exploit the ATMEGA640V-8AUR's simultaneous connectivity options: two to four USARTs, master/slave SPI, and a byte-oriented TWI (I2C) interface, letting one chip bridge field buses to backhaul links. The 64 KB Flash accommodates dual firmware images for safe in-field updates through a bootloader, with 8 KB SRAM providing space for packet buffers on both sides of the bridge. Pin-change interrupt wake-up supports low-duty-cycle listening modes, and the EBI/EMI external bus adds parallel-port expansion for media or memory ICs. In-System Programming via the SPI interface enables production programming with tools such as MPLAB SNAP through an 8-pin SIL connector, using only two device I/O pins plus reset. The 1.8 V to 5.5 V supply range eases integration into mixed-voltage racks and distributed nodes.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATMEGA640V-8AUR — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATMEGA640V-8AU | ATMEGA640-16AUR | ATMEGA640-16CUR | ATMEGA1280V-8AUR | ATMEGA2560V-8AUR | ATMEGA6450V-8AUR |
|---|---|---|---|---|---|---|---|
| Package | 100-TQFP (14 x 14 mm) | 100-TQFP - same footprint | 100-TQFP - same footprint | 100-TQFP - same footprint | 100-TQFP - same footprint | 100-TQFP - same footprint | 100-TQFP - same footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 64 KB | 64 KB | 64 KB | 64 KB | 128 KB | 256 KB | 64 KB |
| Maximum Clock | 8 MHz | 8 MHz | 16 MHz | 16 MHz | 8 MHz | 8 MHz | 8 MHz |
| Supply Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 4.5 V to 5.5 V | 4.5 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 |
| Temperature Grade | A (industrial, -40 C to +85 C) | A (industrial) | A (industrial) | C (commercial, 0 C to 70 C) | A (industrial) | A (industrial) | A (industrial) |
| Special Features | 86 GPIO, 4 USART, EBI/EMI, no LCD | identical, tray packaging | identical I/O set, faster clock | identical I/O set, commercial temp | double Flash, same I/O set | 4x Flash, same I/O set | integrated LCD controller, fewer general I/O |
Principaux différenciateurs
- Wide 1.8 V low-voltage operation at industrial temperature (vs ATMEGA640-16AUR)
- Cost-optimized 64 KB Flash in the family footprint (vs ATMEGA2560V-8AUR)
- Tape-and-reel packaging for automated production (vs ATMEGA640V-8AU)
- General-purpose I/O maximized (no LCD overhead) (vs ATMEGA6450V-8AUR)
Notes de conception
Respect the speed-versus-voltage curve: the ATMEGA640V-8AUR is guaranteed to 8 MHz across 1.8 V to 5.5 V, but never clock it above 8 MHz at low VCC. At 5 V operation, if your codebase needs more throughput, switch to the pin-compatible ATMEGA640-16AUR rather than overclocking. Decouple every VCC and AVCC pin pair with 100 nF ceramic capacitors placed within 2-3 mm of the pins, plus one bulk 10 uF capacitor per supply rail. Tie unused analog multiplexer inputs or configure them to reduce ADC crosstalk.
The 100-pin TQFP has a 0.5 mm pin pitch - specify solder-mask-defined or non-solder-mask-defined pads per your assembler's capability and keep fan-out traces at 0.2 mm width with 0.15 mm clearance to avoid bridging. Place the 8-pin ICSP/DEBUG SIL connector (MPLAB SNAP compatible, using MOSI, MISO, SCK, reset, VCC, GND) near the board edge for rework access. Route the crystal as short as possible with ground guard traces, and keep the ADC analog ground area separate from switching-load returns, joining at a single star point.
Do not assume all ATmega640-family members are interchangeable: the ATMEGA6450V-8AUR trades general I/O for LCD segment drivers, so verify I/O counts before substituting. Remember the 'V' grade is limited to 8 MHz - using a 16 MHz crystal on this part is out of specification. EEPROM writes need careful wear management (4 KB, finite endurance); write calibration data sparingly or implement wear leveling. Finally, when using the watchdog, note it has a separate on-chip oscillator whose timing tolerance is wide - do not use it for precise timekeeping, only for fault recovery.
Informations de conformité
Distributor listings (FindIC, Xecor) describe the ATMEGA640V-8AUR as GREEN package, which corresponds to lead-free/RoHS compliance. REACH, halogen-free, and conflict-minerals status not explicitly stated in provided data.
