ATMEGA8515-16AI - 8-bit AVR MCU, 16MHz, 8KB Flash, 44-TQFP | Microchip
MPN: ATMEGA8515-16AI ✗ Cuối đờiATMEGA8515-16AI Tóm tắt
An 8-bit microcontroller is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (RAM), non-volatile storage (EEPROM), and I/O peripherals on one die. It belongs to the broader family of embedded microcontrollers (MCUs), which are sub-classified as RISC (Reduced Instruction Set Computer) vs CISC architectures; the AVR core is a Harvard-architecture RISC design that executes most instructions in a single clock cycle. Within power-managed electronics, MCUs sit hierarchically below microprocessors and above discrete logic ICs, providing deterministic real-time control with low quiescent power.
Key differentiating features of the ATMEGA8515-16AI include 130 powerful AVR instructions (most single-cycle), 32 general-purpose working registers, fully static operation, throughput approaching 16 MIPS at 16 MHz, an 8-channel 10-bit ADC, two 8-bit timer/counters plus one 16-bit timer/counter, a programmable watchdog timer with separate on-chip oscillator, and rich connectivity peripherals including SPI, UART, and TWI (Two-Wire Interface, I2C-compatible). The device supports 6 sleep modes (Idle, Power-save, Power-down, Standby, Extended Standby, and ADC Noise Reduction) enabling <1 uA power-down current, which is critical for battery-powered and energy-harvesting systems. Industrial-grade temperature range and self-programmable Flash for field firmware updates make it suitable for long-life industrial designs.
Architecturally, the ATmega8515 uses an enhanced AVR RISC core with a 2-stage pipelined Harvard bus, allowing instruction fetch and data access to occur in parallel. The integrated 10-bit successive-approximation ADC provides 8 single-ended channels with optional differential mode, and the on-chip analog comparator enables mixed-signal feedback without external components. The brown-out detector and internal calibrated RC oscillator reduce BOM cost while improving reliability.
Typical applications for the ATMEGA8515-16AI include industrial control systems, sensor interfacing nodes, low-power embedded sensors, communication bridges, motor control for small BLDC/stepper subsystems, USB-to-UART bridges, HVAC controllers, building automation, and any cost-sensitive embedded application requiring deterministic real-time control with low power consumption.
When designing with the ATMEGA8515-16AI, mind the 16 MHz speed grade (the '-16A' suffix specifies this) and ensure VCC is held within 4.5V to 5.5V at full speed; for 3.3V operation consider the ATMEGA8515L-8 family. Verify ISP programming pin assignments and ensure decoupling caps are placed close to the AVCC and VCC pins.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho ATMEGA8515-16AI — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ATMEGA8515-16AI (cùng hình factor và footprint) — khác nhau ở Package, Throughput, Watchdog Timer, General Purpose I/O, Program Memory (Flash).
ATMEGA8515-16AUR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA8515-16JI
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA162V-8AU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATMEGA164A-AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA324PV-10AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA8515-16AI Tỷ lệ tối đa & tính chất điện
| Core Architecture | AVR 8-bit RISC |
| Tần số xung maksimum | 16 MHz |
| Throughput | 16 MIPS (1 MIPS/MHz) |
| Program Memory (Flash) | 8 KB (4K x 16) |
| SRAM (Internal) | 544 bytes |
| External SRAM Support | Up to 64 KB |
| EEPROM | 512 bytes |
| General Purpose Registers | 32 x 8-bit |
| Instruction Set | 130 powerful instructions, mostly single-cycle |
| ADC | 8-channel, 10-bit SAR |
| Timer/Counters | 2 x 8-bit, 1 x 16-bit |
| Connectivity | SPI, UART, TWI (I2C-compatible) |
| Supply Voltage (Vcc) | 4.5 V to 5.5 V |
| Nhiệt độ hoạt động | -40C to +85C (industrial) |
| Hộp | 44-TQFP (10x10 mm) |
| Kiểu lắp đặt | Surface Mount |
| I/O Pins | 35 |
| Programmable Watchdog Timer | Yes, with separate on-chip oscillator |
| Power-down Mode Current | <1 uA (typical) |
Cấu hình chân ATMEGA8515-16AI
| Chân 1 | PB0 (MOSI) — Port B0 / SPI MOSI (ISP programming) |
| Chân 2 | PB1 (MISO) — Port B1 / SPI MISO (ISP programming) |
| Chân 3 | PB2 (SCK) — Port B2 / SPI SCK (ISP programming) |
| Chân 4 | PB3 — Port B3 (digital I/O) |
| Chân 5 | PB4 — Port B4 (digital I/O) |
| Chân 6 | PB5 — Port B5 (digital I/O) |
| Chân 7 | PB6 — Port B6 (digital I/O) |
| Chân 8 | PB7 — Port B7 (digital I/O) |
| Chân 9 | RESET — Reset input (active low) |
| Chân 10 | VCC — Digital supply voltage (+5V) |
| Chân 11 | GND — Ground |
| Chân 12 | XTAL2 — Crystal oscillator output |
| Chân 13 | XTAL1 — Crystal oscillator input |
| Chân 14 | PD0 (RXD) — Port D0 / UART RXD |
| Chân 15 | PD1 (TXD) — Port D1 / UART TXD |
| Chân 16 | PD2 (INT0) — Port D2 / External interrupt 0 |
| Chân 17 | PD3 (INT1) — Port D3 / External interrupt 1 |
| Chân 18 | PD4 — Port D4 (digital I/O) |
| Chân 19 | PD5 — Port D5 (digital I/O) |
| Chân 20 | PD6 — Port D6 (digital I/O) |
| Chân 21 | PD7 — Port D7 (digital I/O) |
| Chân 22 | PC0 — Port C0 / Address/data bus (external SRAM) |
| Chân 23 | PC1 — Port C1 / Address/data bus (external SRAM) |
| Chân 24 | PC2 — Port C2 / Address/data bus (external SRAM) |
| Chân 25 | PC3 — Port C3 / Address/data bus (external SRAM) |
| Chân 26 | PC4 — Port C4 / Address/data bus (external SRAM) |
| Chân 27 | PC5 — Port C5 / Address/data bus (external SRAM) |
| Chân 28 | PC6 — Port C6 / Address/data bus (external SRAM) |
| Chân 29 | PC7 — Port C7 / Address/data bus (external SRAM) |
| Chân 30 | AVCC — Analog supply voltage (for ADC) |
| Chân 31 | AGND — Analog ground |
| Chân 32 | AREF — ADC reference voltage |
| Chân 33 | PA7 — Port A7 / Address bus (external SRAM) |
| Chân 34 | PA6 — Port A6 / Address bus (external SRAM) |
| Chân 35 | PA5 — Port A5 / Address bus (external SRAM) |
| Chân 36 | PA4 — Port A4 / Address bus (external SRAM) |
| Chân 37 | PA3 — Port A3 / Address bus (external SRAM) |
| Chân 38 | PA2 — Port A2 / Address bus (external SRAM) |
| Chân 39 | PA1 — Port A1 / Address bus (external SRAM) |
| Chân 40 | PA0 — Port A0 / Address bus (external SRAM) |
| Chân 41 | PE1 (OC1B) — Port E1 / Timer1 Output compare B |
| Chân 42 | PE0 (OC1A) — Port E0 / Timer1 Output compare A / PDI |
| Chân 43 | ALE — Address Latch Enable (external SRAM) |
| Chân 44 | GND — Ground |
Ứng dụng tiêu biểu
ATMEGA8515-16AI phù hợp cho 6 Áp dụngs: Industrial Control Systems, Embedded Sensor Interface Boards, Communication Bridges and Protocol Converters, Motor Control for Small BLDC/Stepper Subsystems, Building Automation Controllers, USB-to-UART and ISP Programming Bridges.
Industrial Control Systems
The ATMEGA8515-16AI fits industrial control system backplanes and PLC I/O modules thanks to its 8 KB self-programmable Flash for field firmware updates, 16 MHz / 16 MIPS throughput for deterministic real-time control, and full industrial temperature range (-40C to +85C). Its 35 digital I/O pins drive relays, optocouplers, and 24V signal-conditioning interfaces, while the integrated 8-channel 10-bit ADC reads 4-20 mA loopbacks or potentiometer feedback. The <1 uA power-down current and 6 sleep modes suit battery-backed remote terminal units (RTUs). Compared with logic-only controllers, the AVR RISC core executes control loops in single-cycle instructions, dramatically reducing latency for PID and state-machine tasks. Pin compatibility with the ATmega8515-16AU (lead-free) enables direct RoHS-compliant migration without PCB rework, supporting long-life industrial designs.
Được đề xuất
Embedded Sensor Interface Boards
The ATMEGA8515-16AI is well-suited to sensor interface boards for HVAC, environmental monitoring, and building automation thanks to its 8-channel 10-bit SAR ADC, two 8-bit plus one 16-bit timer/counter for PWM-driven sensor excitation, and SPI/UART/TWI peripherals for connecting digital sensors. The 544B internal SRAM handles small sensor data buffers, while external SRAM expansion up to 64 KB supports larger data logging applications. The on-chip analog comparator enables threshold-based sensor triggering without external components. Compared with a discrete op-amp + counter solution, the ATmega8515 integrates the ADC, timers, and serial interfaces on a single die, reducing BOM cost and PCB area. Pin-compatible upgrades like ATmega324PV-10AU (32 KB Flash) allow field expansion to richer sensor fusion algorithms.
Được đề xuất
Communication Bridges and Protocol Converters
The ATMEGA8515-16AI excels as a bridge controller for protocol conversion (e.g., UART-to-SPI, UART-to-TWI, RS-232 to RS-485) due to its three independent serial interfaces operating concurrently and the 16 MIPS throughput sufficient to handle DMA-style protocol translation at common baud rates up to 1 Mbaud. The 8 KB Flash supports full protocol stacks for Modbus RTU, DMX-512, or NMEA-0183 without external memory. The programmable watchdog timer with separate on-chip oscillator ensures the bridge auto-recovers from communication faults. Compared with logic-only bridge ICs, the AVR core allows custom protocol extensions and firmware updates via the ISP interface. The ATmega8515 family supports ISP in-circuit programming which means bridges can be reflashed in the field, an invaluable feature for installed communication gateways.
Được đề xuất
Motor Control for Small BLDC/Stepper Subsystems
The ATMEGA8515-16AI handles small brushless DC (BLDC) and stepper motor control loops where the 16-bit timer/counter provides precise PWM generation, the 8-channel ADC samples back-EMF or current-sense feedback, and the hardware quadrature counter interface (on external interrupt pins) tracks encoder position. The 16 MIPS throughput runs field-oriented control (FOC) or trapezoidal commutation algorithms at sufficient loop bandwidth for sub-100W motors. The integrated programmable watchdog timer adds a safety layer that disables outputs on firmware fault - critical for motor safety. Compared with a discrete analog motor controller, the ATmega8515 enables firmware-tunable acceleration curves and torque profiles via the Flash-upgradeable ISP interface. The 6 sleep modes also support battery-powered lawnmowers or robot vacuum subsystems.
Được đề xuất
Building Automation Controllers
The ATMEGA8515-16AI powers building automation controllers such as HVAC zone controllers, lighting dimmer modules, and access-control panels thanks to its deterministic real-time response (4-8 MIPS headroom for typical BACnet/LonWorks-equivalent firmware), industrial temperature range, and 35 GPIO pins for relays, triacs, and keypad scanning. The integrated UART enables connection to BACnet MS-TP or Modbus RTU building networks, while TWI connects to local I/O expanders and temperature sensors. The 512B EEPROM stores non-volatile configuration (setpoints, schedules) across power cycles, and the brown-out detector prevents corrupted writes during brown-out events. Compared with logic-only controllers, the ATmega8515 enables custom UI logic and OTA-style firmware via ISP. The legacy pin compatibility with the ATmega8515 family ensures long-life support for 15+ year building automation deployments.
Được đề xuất
USB-to-UART and ISP Programming Bridges
The ATMEGA8515-16AI serves in low-cost USB-to-UART bridges, JTAG/ISP debug bridges, and field-programmer dongles thanks to its 16 MIPS throughput, integrated UART (TTL-level), SPI (for ISP), and TWI peripherals. The 8 KB Flash holds bridge firmware including USB-CDC class emulation when paired with a USB-serial chip. The programmable watchdog timer ensures bridges auto-recover if host-side firmware faults occur. Compared with dedicated bridge ICs like the FTDI FT232, the ATmega8515-based design is firmware-upgradable via the same ISP that programs the bridge itself - reducing service costs in production lines. The drop-in pin-compatible ATmega8515-16AU is the RoHS-compliant migration path for new EU-compliant production lines.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATMEGA8515-16AI — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | ATMEGA8515-16AU | ATMEGA8515-16JI | ATMEGA162V-8AU | ATMEGA164A-AU |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP - same family |
| Flash | 8 KB | 8 KB | 8 KB | 16 KB | 16 KB |
| SRAM (Internal) | 544 B | 544 B | 544 B | 1 KB | 1 KB |
| Maximum Clock | 16 MHz @ 5V | 16 MHz @ 5V | 16 MHz @ 5V | 8 MHz @ 2.7-5.5V | 20 MHz @ 5V |
| Operating Voltage | 4.5 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 |
| I/O Pins | 35 | 35 | 35 | 35 | 32 |
Bảo phân biệt quan trọng
- External SRAM bus support up to 64 KB (vsATMEGA164A-AU)
- Long-life pin compatibility dating from AT90S8515 (vsATMEGA162V-8AU)
- 16 MHz speed grade at 5V vs 8 MHz in the 'L' variant (vsATMEGA8515L-8AI)
Ghi chú thiết kế
The ATMEGA8515-16AI requires a stable 5V supply (4.5V to 5.5V) for full-speed 16 MHz operation. Place a 100 nF ceramic decoupling capacitor close to each VCC pin (pin 10) and a single 10 uF tantalum or ceramic bulk capacitor on the supply rail. Connect AVCC (pin 30) to VCC through an LC or ferrite-bead filter for ADC noise isolation, and decouple AVCC with a 100 nF + 10 uF combination. The internal brown-out detector (BOD) trigger level is configurable via fuses; setting BOD to 4.0V prevents corrupted Flash writes during supply droops.
Route crystal traces (XTAL1 pin 13, XTAL2 pin 12) as short as possible, surrounded by a ground guard ring, and keep them away from switching signals to avoid injecting clock noise. For 16 MHz operation use a fundamental-mode crystal with 12-22 pF load capacitors matching the crystal's CL specification. The TQFP-44 package has an exposed thermal pad - solder it to a copper pour on the top layer connected to GND for improved thermal dissipation, though power dissipation at 16 MHz/5V is typically below 50 mA and rarely requires active cooling.
Estimated: the device draws approximately 15-20 mA active at 16 MHz/5V, dropping to <1 uA in power-down mode. A common pitfall is leaving the watchdog timer enabled after ISP programming - the ATMEGA8515 ships with the WDT enabled by default and will reset the MCU after ~16 ms if not cleared, confusing first-time developers. Another pitfall is forgetting to disable JTAGEN fuse before ISP-only designs - this frees the PORTC pins for general I/O. Always verify the lockbits configuration to protect firmware IP from unauthorized ISP reads.
When using the external SRAM interface (Port A as address bus, Port C as multiplexed address/data bus), ensure the ALE trace (pin 43) is routed with matched impedance and minimal loading - long ALE traces cause address-setup violations at high bus speeds. Add a 74HC573 or 74HCT573 latch between Port C and the external SRAM if bus noise is observed. The 35 mA per-pin sink/source capability allows direct LED drive but always use series resistors (typically 330 ohm for 5V LEDs). For ADC sampling above 200 kHz add an external ADC input buffer - the internal mux adds 4-cycles settling time which can degrade THD for fast signals.
Thông tin tuân thủ
RoHS status of the ATMEGA8515-16AI variant is not specified in the provided verified web data; the ATMEGA8515-16AU suffix AU indicates lead-free per Microchip part-number convention. Verify RoHS compliance via the manufacturer datasheet before EU-compliant designs.