ATMEGA640-16AUR - 8-bit AVR MCU 64KB Flash 16MHz TQFP-100 | Microchip
MPN: ATMEGA640-16AUR ✓ فعالATMEGA640-16AUR جائزہ
An 8-bit AVR microcontroller is a Harvard-architecture RISC processor that executes most instructions in a single clock cycle, delivering close to 1 MIPS per MHz. The AVR ATmega family sits within the broader taxonomy of microcontroller units (MCUs) under the semiconductor and embedded-system hierarchy, and the ATmega640 shares its core with the ATmega1280/ATmega2560 used on the Arduino Mega platform, making it familiar to a wide embedded engineering audience.
Key features include 32 general-purpose working registers, six flexible timer/counters with compare and PWM modes, a real-time counter with separate oscillator, and an 8/16-channel 10-bit successive-approximation ADC. The device also integrates two programmable serial USARTs, a master/slave SPI interface, a byte-oriented 2-wire serial interface (TWI/I2C-compatible), a programmable watchdog timer with its own on-chip oscillator, an on-chip analog comparator, and an output-compare modulator for dead-time generation.
Technical depth: the AVR core achieves close to 1 MIPS per MHz throughput, allowing the ATMEGA640-16AUR to deliver approximately 16 MIPS at 16 MHz while keeping active power low. ISP Flash supports firmware updates on the final PCB without removing the device, the 4 KB EEPROM retains calibration and configuration data through power cycles, and the 100-pin TQFP package exposes enough I/O for parallel buses, multiple UART channels, and PWM-rich motor-control front-ends simultaneously.
Typical applications include industrial control systems, building automation and HVAC controllers, consumer appliances, white goods, and instrumentation requiring many I/O lines and multiple serial channels. Its Arduino Mega compatibility also makes it popular for rapid prototyping and education.
Design consideration: the suffix decoding matters - 16A = 16 MHz / 4.5-5.5 V, U = industrial temperature (-40C to +85C), R = tape-and-reel. For 2.7-5.5 V or 8 MHz battery designs, choose ATmega640V-8AUR instead. Ensure ISP programming signals (MOSI, MISO, SCK, RESET) are brought out to a programming header.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet, with data verified as of 2026-10-07.
کے لیے ڈراپ اِن متبادل ATMEGA640-16AUR — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں ATMEGA640-16AUR (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف ADC, Flash Memory, Package, RoHS Status, EEPROM.
ATMEGA640-16AU
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ATMEGA1280-16AUR
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ATMEGA2560-16AUR
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ATMEGA1281-16AUR
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ATMEGA2561-16AUR
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ATMEGA640-16AUR زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Core Architecture | 8-bit AVR RISC |
| Program Memory (Flash) | 64 KB (32K x 16) |
| SRAM | 8 KB |
| EEPROM | 4 KB |
| Maximum CPU Clock | 16 MHz |
| Operating Voltage (Vcc) | 4.5 V to 5.5 V |
| General-Purpose I/O Lines | 86 |
| General-Purpose Working Registers | 32 |
| Timer/Counters | 6 flexible timer/counters with compare/PWM |
| ADC | 10-bit, 8/16-channel |
| USART | 2 programmable serial USARTs |
| SPI | 1 master/slave SPI |
| TWI (I2C-compatible) | 1 byte-oriented 2-wire interface |
| Analog Comparator | On-chip |
| Watchdog Timer | Programmable, with separate on-chip oscillator |
| پیکیج | 100-pin TQFP (14x14 mm) |
| ماؤنٹنگ ٹائپ | Surface Mount |
| آپریٹنگ درجہ حرارت | -40C to +85C (industrial) |
| In-System Programmable (ISP) | Yes |
| RoHS اسٹیٹس | Compliant |
ATMEGA640-16AUR پن کنفیگریشن
| پن 1 | VCC — Digital supply voltage (5 V) |
| پن 2 | PE0 (RXD0/PCINT8) — Port E bit 0 / USART0 RXD |
| پن 3 | PE1 (TXD0) — Port E bit 1 / USART0 TXD |
| پن 4 | PE2 (XCK0/AIN0) — Port E bit 2 / USART0 XCK / Analog Comparator Positive Input |
| پن 5 | PE3 (OC3A/AIN1) — Port E bit 3 / Timer3 Compare A / Analog Comparator Negative Input |
| پن 6 | PE4 (OC3B/INT4) — Port E bit 4 / Timer3 Compare B / External Interrupt 4 |
| پن 7 | PE5 (OC3C/INT5) — Port E bit 5 / Timer3 Compare C / External Interrupt 5 |
| پن 8 | PE6 (T3/INT6) — Port E bit 6 / Timer3 Clock Input / External Interrupt 6 |
| پن 9 | PE7 (CLKO/ICP3) — Port E bit 7 / System Clock Output / Timer3 Input Capture |
| پن 10 | VCC — Digital supply voltage (5 V) |
| پن 11 | GND — Ground |
| پن 12 | PH0 (RXD2) — Port H bit 0 / USART2 RXD |
| پن 13 | PH1 (TXD2) — Port H bit 1 / USART2 TXD |
| پن 14 | PH2 (XCK2) — Port H bit 2 / USART2 XCK |
| پن 15 | PH3 (OC4A) — Port H bit 3 / Timer4 Compare A |
| پن 16 | PH4 (OC4B) — Port H bit 4 / Timer4 Compare B |
| پن 17 | PH5 (OC4C) — Port H bit 5 / Timer4 Compare C |
| پن 18 | PH6 (OC2B) — Port H bit 6 / Timer2 Compare B |
| پن 19 | PH7 (T4) — Port H bit 7 / Timer4 Clock Input |
| پن 20 | PB0 (SS/PCINT0) — Port B bit 0 / SPI Slave Select |
| پن 21 | PB1 (SCK/PCINT1) — Port B bit 1 / SPI Bus Clock |
| پن 22 | PB2 (MOSI/PCINT2) — Port B bit 2 / SPI Master Out Slave In |
| پن 23 | PB3 (MISO/PCINT3) — Port B bit 3 / SPI Master In Slave Out |
| پن 24 | PB4 (OC2A/PCINT4) — Port B bit 4 / Timer2 Compare A |
| پن 25 | PB5 (OC1A/PCINT5) — Port B bit 5 / Timer1 Compare A |
| پن 26 | PB6 (OC1B/PCINT6) — Port B bit 6 / Timer1 Compare B |
| پن 27 | PB7 (OC0A/OC1C/PCINT7) — Port B bit 7 / Timer0 Compare A / Timer1 Compare C |
| پن 28 | VCC — Digital supply voltage (5 V) |
| پن 29 | GND — Ground |
| پن 30 | AVCC — Analog supply voltage (5 V) - for ADC |
| پن 31 | GND — Ground |
| پن 32 | AREF — ADC reference voltage input |
| پن 33 | PF0 (ADC0) — Port F bit 0 / ADC Input Channel 0 |
| پن 34 | PF1 (ADC1) — Port F bit 1 / ADC Input Channel 1 |
| پن 35 | PF2 (ADC2) — Port F bit 2 / ADC Input Channel 2 |
| پن 36 | PF3 (ADC3) — Port F bit 3 / ADC Input Channel 3 |
| پن 37 | PF4 (ADC4/TCK) — Port F bit 4 / ADC Input Channel 4 / JTAG TCK |
| پن 38 | PF5 (ADC5/TMS) — Port F bit 5 / ADC Input Channel 5 / JTAG TMS |
| پن 39 | PF6 (ADC6/TDO) — Port F bit 6 / ADC Input Channel 6 / JTAG TDO |
| پن 40 | PF7 (ADC7/TDI) — Port F bit 7 / ADC Input Channel 7 / JTAG TDI |
| پن 41 | PA0 (AD0) — Port A bit 0 / External Memory Address/Data bit 0 |
| پن 42 | PA1 (AD1) — Port A bit 1 / External Memory Address/Data bit 1 |
| پن 43 | PA2 (AD2) — Port A bit 2 / External Memory Address/Data bit 2 |
| پن 44 | PA3 (AD3) — Port A bit 3 / External Memory Address/Data bit 3 |
| پن 45 | PA4 (AD4) — Port A bit 4 / External Memory Address/Data bit 4 |
| پن 46 | PA5 (AD5) — Port A bit 5 / External Memory Address/Data bit 5 |
| پن 47 | PA6 (AD6) — Port A bit 6 / External Memory Address/Data bit 6 |
| پن 48 | PA7 (AD7) — Port A bit 7 / External Memory Address/Data bit 7 |
| پن 49 | VCC — Digital supply voltage (5 V) |
| پن 50 | GND — Ground |
| پن 51 | PC7 (A15) — Port C bit 7 / External Memory Address bit 15 |
| پن 52 | PC6 (A14) — Port C bit 6 / External Memory Address bit 14 |
| پن 53 | PC5 (A13) — Port C bit 5 / External Memory Address bit 13 |
| پن 54 | PC4 (A12) — Port C bit 4 / External Memory Address bit 12 |
| پن 55 | PC3 (A11) — Port C bit 3 / External Memory Address bit 11 |
| پن 56 | PC2 (A10) — Port C bit 2 / External Memory Address bit 10 |
| پن 57 | PC1 (A9) — Port C bit 1 / External Memory Address bit 9 |
| پن 58 | PC0 (A8) — Port C bit 0 / External Memory Address bit 8 |
| پن 59 | PG1 (RD) — Port G bit 1 / External Memory Read strobe |
| پن 60 | PG0 (WR) — Port G bit 0 / External Memory Write strobe |
| پن 61 | PD7 (T0) — Port D bit 7 / Timer0 Clock Input |
| پن 62 | PD6 (T1) — Port D bit 6 / Timer1 Clock Input |
| پن 63 | PD5 (XCK1) — Port D bit 5 / USART1 XCK |
| پن 64 | PD4 (ICP1) — Port D bit 4 / Timer1 Input Capture |
| پن 65 | PD3 (INT3/TXD1) — Port D bit 3 / External Interrupt 3 / USART1 TXD |
| پن 66 | PD2 (INT2/RXD1) — Port D bit 2 / External Interrupt 2 / USART1 RXD |
| پن 67 | PD1 (SDA/INT1) — Port D bit 1 / TWI SDA / External Interrupt 1 |
| پن 68 | PD0 (SCL/INT0) — Port D bit 0 / TWI SCL / External Interrupt 0 |
| پن 69 | PG2 (ALE) — Port G bit 2 / External Memory Address Latch Enable |
| پن 70 | VCC — Digital supply voltage (5 V) |
| پن 71 | GND — Ground |
| پن 72 | PK7 (ADC15/PCINT23) — Port K bit 7 / ADC Input Channel 15 |
| پن 73 | PK6 (ADC14/PCINT22) — Port K bit 6 / ADC Input Channel 14 |
| پن 74 | PK5 (ADC13/PCINT21) — Port K bit 5 / ADC Input Channel 13 |
| پن 75 | PK4 (ADC12/PCINT20) — Port K bit 4 / ADC Input Channel 12 |
| پن 76 | PK3 (ADC11/PCINT19) — Port K bit 3 / ADC Input Channel 11 |
| پن 77 | PK2 (ADC10/PCINT18) — Port K bit 2 / ADC Input Channel 10 |
| پن 78 | PK1 (ADC9/PCINT17) — Port K bit 1 / ADC Input Channel 9 |
| پن 79 | PK0 (ADC8/PCINT16) — Port K bit 0 / ADC Input Channel 8 |
| پن 80 | PJ7 — Port J bit 7 |
| پن 81 | PJ6 (PCINT15) — Port J bit 6 |
| پن 82 | PJ5 (PCINT14) — Port J bit 5 |
| پن 83 | PJ4 (PCINT13) — Port J bit 4 |
| پن 84 | PJ3 (PCINT12) — Port J bit 3 |
| پن 85 | PJ2 (PCINT11) — Port J bit 2 |
| پن 86 | PJ1 (PCINT10) — Port J bit 1 |
| پن 87 | PJ0 (PCINT9) — Port J bit 0 |
| پن 88 | PE0 — Port E bit 0 (second function on this pin) |
| پن 89 | PE1 — Port E bit 1 (second function on this pin) |
| پن 90 | PE2 — Port E bit 2 (second function on this pin) |
| پن 91 | PE3 — Port E bit 3 (second function on this pin) |
| پن 92 | PE4 — Port E bit 4 (second function on this pin) |
| پن 93 | PE5 — Port E bit 5 (second function on this pin) |
| پن 94 | PE6 — Port E bit 6 (second function on this pin) |
| پن 95 | PE7 — Port E bit 7 (second function on this pin) |
| پن 96 | VCC — Digital supply voltage (5 V) |
| پن 97 | GND — Ground |
| پن 98 | XTAL2 — Crystal oscillator output |
| پن 99 | XTAL1 — Crystal oscillator input / external clock |
| پن 100 | RESET — Reset input (active low) |
عام استعمالات
ATMEGA640-16AUR کے لیے موزوں ہے 6 ایپلیکیشنs: Industrial Control Systems, Building Automation and HVAC, Consumer Appliances and White Goods, Instrumentation and Data Acquisition, Rapid Prototyping and Arduino-Compatible Designs, Education and Embedded Learning Platforms.
Industrial Control Systems
The ATMEGA640-16AUR fits industrial control applications because its 86 GPIO lines and six timer/counters easily drive multi-axis stepper/DC motor bridges, opto-isolated inputs, and relay outputs simultaneously. The 16 MHz CPU delivers 16 MIPS - sufficient for PID loops at typical 1 kHz control rates on multiple axes - while the 8 KB SRAM holds control tables and the 4 KB EEPROM stores calibration constants across power cycles. The industrial -40C to +85C temperature rating and 4.5-5.5 V supply match 5 V industrial backplanes without level shifters, and ISP Flash allows secure firmware updates via a programming header on the final assembly.
تجویز کردہ
Building Automation and HVAC
Building automation controllers benefit from the ATMEGA640-16AUR's two USARTs, SPI, and TWI interfaces for simultaneously talking to Modbus RTU sensors, BACnet MS/TP networks, and local I2C peripherals (EEPROMs, RTCs, displays). The 86 I/O lines comfortably support multi-zone thermostat panels with keypads, character LCDs, and triac-driver outputs for damper and valve actuators. With 64 KB Flash, the device runs BACnet/Modbus stacks plus scheduling logic on-chip, and the 4 KB EEPROM retains setpoint schedules through power-loss events typical in HVAC installations.
تجویز کردہ
Consumer Appliances and White Goods
The ATMEGA640-16AUR suits consumer appliances (washing machines, dishwashers, microwave ovens) where multiple motors, valves, sensors, and a user interface must be coordinated from a single MCU. Its 6 timer/counters with PWM modes drive motor bridges and inverter controls, the 10-bit ADC reads temperature/pressure/humidity sensors, and 86 GPIO lines connect to keypads, LCD/LED displays, and buzzer drivers. The ISP Flash allows late-stage firmware customization per model variant, and the 5 V industrial temperature rating covers under-cabinet appliance environments without extra components.
تجویز کردہ
Instrumentation and Data Acquisition
The ATMEGA640-16AUR's 10-bit ADC with up to 16 channels, 8 KB SRAM for sample buffering, and 64 KB Flash for embedded signal-processing code make it well-suited to multi-channel data-acquisition front-ends. Two USARTs let the device stream data to a host PC while simultaneously talking to an isolated RS-485 sensor bus, and the TWI port connects to external 24-bit sigma-delta ADCs or DACs for higher precision. The 4 KB EEPROM stores calibration coefficients and channel-configuration data; ISP allows field recalibration without disassembling the instrument.
تجویز کردہ
Rapid Prototyping and Arduino-Compatible Designs
The ATMEGA640-16AUR is functionally identical to the ATmega1280/2560 used on the Arduino Mega platform, so it benefits from the mature Arduino MegaCore open-source hardware package, library ecosystem, and community examples. Engineers prototyping 5 V Mega-form-factor designs can use the ATMEGA640-16AUR as a cost-optimized lower-Flash variant, with the same schematic footprint and 86 I/O mapping. The 16 MHz clock and 5 V supply match the original Mega reference design exactly, and ISP via the standard ICSP header supports bootloader flashing as well as in-circuit debugging.
تجویز کردہ
Education and Embedded Learning Platforms
The ATMEGA640-16AUR provides an ideal teaching platform because it exposes nearly the entire AVR peripheral set - 86 GPIO, 6 timers, 10-bit ADC, two USARTs, SPI, TWI, analog comparator, and watchdog - in a single accessible 100-pin TQFP package. With 64 KB Flash, students can implement real RTOS kernels, file systems, or protocol stacks; with 4 KB EEPROM they can experiment with persistent storage; and with ISP they can repeatedly flash and debug code via low-cost tools such as the Microchip MPLAB Snap or Atmel-ICE. The 5 V industrial temperature rating also makes laboratory boards robust against student wiring errors.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا ATMEGA640-16AUR — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | ATMEGA640-16AU | ATMEGA1280-16AUR | ATMEGA2560-16AUR | ATMEGA1281-16AUR | ATMEGA2561-16AUR |
|---|---|---|---|---|---|---|
| Package | 100-pin TQFP (14x14 mm) | 100-pin TQFP (14x14 mm) - same | 100-pin TQFP (14x14 mm) - same | 100-pin TQFP (14x14 mm) - same | 100-pin TQFP (14x14 mm) - same | 100-pin TQFP (14x14 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash | 64 KB | 64 KB | 128 KB | 256 KB | 128 KB | 256 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| EEPROM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
| Maximum Clock | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| GPIO Lines | 86 | 86 | 86 | 86 | 54 (64-pin family) | 54 (64-pin family) |
| Operating Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| ADC Channels | 16 (10-bit) | 16 (10-bit) | 16 (10-bit) | 16 (10-bit) | 8 (10-bit) | 8 (10-bit) |
| Packaging | Tape & Reel (R suffix) | Tray (no R suffix) | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel |
اہم امتیازی خصوصیات
- Balanced memory configuration vs smaller AVR family members (بمقابلہATMEGA328P-AUR)
- Compatible with Arduino Mega ecosystem and MegaCore package (بمقابلہATMEGA164A-AU)
- 100% forward-compatible upgrade path to ATMEGA2560-16AUR (بمقابلہATMEGA2560-16AUR)
- More ADC channels than 64-pin ATmega1281/2561 family (بمقابلہATMEGA1281-16AUR)
ڈیزائن نوٹس
The ATMEGA640-16AUR requires both a digital VCC (5 V, multiple pins 10/28/49/70/96) and an analog AVCC (5 V, pin 30). Per the Microchip ATmega640 datasheet, AVCC should be tied to VCC through a low-pass filter (typically a ferrite bead + 0.1 uF + 10 uF capacitor) and AREF should be bypassed with a 100 nF capacitor even when using the internal reference. Decoupling: place one 100 nF ceramic on each VCC pin pair (VCC+GND), with a bulk 10-47 uF tantalum or ceramic near the supply pin. AREF decoupling is critical for ADC noise performance - the 10-bit ADC is sensitive to high-frequency supply noise riding on AVCC.
Route the crystal traces (XTAL1 pin 99, XTAL2 pin 98) short and symmetric with guard ground on both sides; keep digital signal traces away from the crystal loop to minimize clock jitter. The 100-pin TQFP (14x14 mm body, 0.5 mm pitch) is hand-solderable but rework-prone - design a small SPI/ICSP footprint (2x3 pin, 0.1 inch header) for ISP programming via MOSI/MISO/SCK/RESK from PB0-PB3 and pin 100. The RESET pin (pin 100) should have a 10 kohm pull-up to VCC and a 100 nF capacitor to ground for debouncing; ensure in-circuit debugging tools do not interfere with this RC network.
Do not assume ISP programming works on a freshly powered board - the AVR fuses must be set correctly (typically default: internal RC oscillator, 16 MHz CKDIV8, JTAG enabled). If fuses are mis-set (e.g., external clock selected but no clock present), the device appears 'bricked' and requires a high-voltage parallel programmer (e.g., Microchip STK500 or Atmel-ICE with HV mode) to recover. Always place the ISP header on the PCB and verify SPI signals with an oscilloscope during prototype bring-up. Also note the 'A' suffix denotes 4.5-5.5 V operation; using 'V-8A' variant at 16 MHz will fail to function reliably above 3 V supply.
At industrial -40C to +85C operation, the TQFP-100 package provides adequate thermal dissipation for the typical 15-20 mA active current. However, when the device is driving many GPIO pins simultaneously (e.g., backplane drivers, LED matrix), total I/O current can reach 200-400 mA, raising junction temperature. Estimated: at 5 V VCC, 200 mA total I/O current = 1 W dissipation, theta_JA ~50 C/W for TQFP-100 on 4-layer PCB -> 50C rise above ambient; within industrial range but with minimal margin. For high-I/O applications, distribute loads across multiple VCC/GND pin pairs to minimize ground bounce.
تعمیل کی معلومات
RoHS compliant per Microchip product page. The ATMEGA640-16AUR is the industrial-temperature (-40C to +85C) variant, but it is NOT AEC-Q100 qualified for automotive applications - choose ATMEGA640-16MUR or AEC-Q100-qualified ATmega equivalent for automotive designs. Lead-free (Pb-free) reflow profile per JEDEC J-STD-020.
