ATMEGA8515-16JI - 8-Bit AVR MCU 16MHz 8KB Flash 44-PLCC | Microchip
MPN: ATMEGA8515-16JI ✓ Hoạt độngATMEGA8515-16JI Tóm tắt
A microcontroller unit (MCU) integrates a processor core, program memory, data memory, and peripherals on a single silicon die, sitting at the center of the embedded-systems hierarchy between bare logic ICs and full application processors. The ATmega8515 belongs to Microchip's (formerly Atmel) AVR ATmega family of 8-bit RISC microcontrollers, which execute most of their 130 instructions in a single clock cycle.
Key features include the AVR enhanced RISC architecture with 32 general-purpose working registers, 35 programmable I/O lines, and a full external memory interface up to 64 KB. Peripherals include two flexible Timer/Counters with compare modes, a Serial Programmable USART, a Master/Slave SPI interface, and a programmable Watchdog Timer with on-chip oscillator. Special microcontroller features include In-System Programmable (ISP) Flash with Read-While-Write capability, debugWIRE-compatible on-chip debugging through ICE support, and power-saving Idle and Power-down modes.
The -16JI suffix defines the operating envelope: 4.5 V to 5.5 V supply, 0 to 16 MHz operation, and the industrial temperature range of -40C to +85C, making the device suitable for uncontrolled factory and outdoor environments. The self-programming Flash enables field firmware updates over UART or SPI without a parallel programmer.
Typical applications include industrial control panels, motor-control front ends, legacy process instrumentation, and communications interface boards that leverage the 44-PLCC through-hole-friendly footprint and 5 V noise immunity.
Design consideration: when using the external SRAM interface, reserve ports A and C for address and data buses, leaving only 3 free I/O lines - budget pin usage early.
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 ATMEGA8515-16JI — 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 ATMEGA8515-16JI (cùng hình factor và footprint) — khác nhau ở Package, Throughput, Communication Interfaces, Operating Temperature, SRAM.
ATMEGA8515-16JC
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA8515L-8JU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA8515L-8JI
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATMEGA162-16JI
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATMEGA8515-16JI Tỷ lệ tối đa & tính chất điện
| Core Architecture | AVR 8-bit RISC |
| Tần số xung maksimum | 16 MHz |
| Flash Program Memory | 8 KB (4K x 16) |
| SRAM | 512 bytes internal + up to 64 KB external |
| EEPROM | 512 bytes |
| I/O Lines | 35 |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Khoảng nhiệt độ hoạt động | -40C to +85C (industrial) |
| MIPS Throughput | 16 MIPS at 16 MHz |
| Timers | Two Timer/Counters with compare modes |
| Communication Interfaces | USART, SPI, TWI |
| Watchdog Timer | Programmable, with on-chip oscillator |
| Hộp | 44-PLCC (16.6 x 16.6 mm) |
| Kiểu lắp đặt | Surface Mount |
| In-System Programming | Yes, ISP with Read-While-Write |
| Instructions | 130, most single-cycle |
| External Memory Interface | Up to 64 KB SRAM |
Hướng dẫn cấu hình chân ATMEGA8515-16JI 44-plcc (16.6 x 16.6 mm)
Cấu hình chân cho ATMEGA8515-16JI (44-plcc (16.6 x 16.6 mm) gói). IC số này bao gồm chân GPIO, giao diện truyền thông (UART, SPI, I2C) và chân nguồn. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết các chức năng chân thay thế và tùy chọn cấu hình. Cực kỳ quan trọng cho thiết kế hệ thống tích hợp và lập trình PCB.
Không có dữ liệu chân cụ thể sẵn có cho ATMEGA8515-16JI.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
ATMEGA8515-16JI phù hợp cho 6 Áp dụngs: Industrial Control Panels, Legacy Instrumentation Upgrades, Serial Communication Gateways, Motor Control Front Ends, Data Loggers with External Memory, Building Automation and Security Nodes.
Industrial Control Panels
The ATMEGA8515-16JI fits industrial control panels because its -40C to +85C industrial temperature grade and 4.5 V to 5.5 V supply tolerate noisy factory power rails without extra regulation stages. Its 35 I/O lines drive relays, contactors, and status LEDs directly, while the USART links to HMI terminals and the SPI interface reads rotary encoders or ADC front ends. In a typical panel controller, the MCU polls digital inputs at a 1 kHz timer tick using Timer/Counter0 and executes a scan-cycle state machine at 16 MIPS, leaving ample headroom. The Watchdog Timer with its independent on-chip oscillator recovers the system from latch-ups, a mandatory feature for unattended equipment. The 44-PLCC package mates with widely available PLCC sockets, enabling field replacement without hot-air rework on the factory floor.
Được đề xuất
Legacy Instrumentation Upgrades
The ATMEGA8515-16JI is a natural replacement CPU for aging 8051- and Z80-based bench instruments, because its external memory interface addresses up to 64 KB of SRAM - matching classic 8-bit bus architectures. Port A acts as the multiplexed data bus and port C as the address bus, with ALE latching the low address byte, so original static RAM chips can often be retained. The 16 MIPS single-cycle RISC core at 16 MHz outperforms a 12-clock-per-machine-cycle 8051 by an order of magnitude, letting engineers add features like USB-serial bridges or better filtering while keeping the original analog front end. According to Microchip documentation, 10,000-cycle Flash endurance supports repeated calibration firmware updates on service benches.
Được đề xuất
Serial Communication Gateways
The ATMEGA8515-16JI serves protocol-gateway duties between RS-232/RS-485 field buses and SPI- or TWI-attached modules. The hardware USART with baud-rate generator reliably runs 115200 baud from a 16 MHz clock, while the Master/Slave SPI and TWI interfaces bridge to EEPROMs, RTCs, and sensor chips. A typical gateway uses the 512 bytes of internal SRAM for ring buffers and expands to external SRAM when framing multi-KB payloads, exploiting the 64 KB external memory interface unique in this MCU class. The industrial -40C to +85C rating and 5 V I/O tolerance suit rooftop antennas and unheated cabinets where 3.3 V controllers would need level shifting. Idle and Power-down modes cut consumption in poll-driven slave nodes.
Được đề xuất
Motor Control Front Ends
The ATMEGA8515-16JI implements basic PWM motor control using its two Timer/Counters with compare modes, generating hardware PWM outputs for H-bridge or MOSFET driver stages without CPU load. At 16 MHz, an 8-bit PWM reaches roughly 62.5 kHz carrier frequency - inaudible and suitable for small DC motors and fan controllers. The 35 I/O lines read limit switches, hall sensors, and encoder quadrature signals, while the Watchdog Timer guarantees safe shutdown if firmware hangs. Designers should add current-sense amplification into an external ADC over SPI, since this MCU lacks an internal ADC. The industrial temperature rating covers enclosed drive cabinets reaching +85C ambient, and the 5 V noise immunity keeps logic signals robust near switching power stages.
Được đề xuất
Data Loggers with External Memory
The ATMEGA8515-16JI excels in data-logger designs that outgrow internal SRAM, because the external memory interface maps up to 64 KB of SRAM transparently into the data address space. Firmware simply reads and writes far addresses while the hardware handles ALE latching and bus timing, avoiding bit-banged overhead. The SPI interface additionally chains SPI flash or SD-card modules for gigabyte-scale logging, and the USART streams data to a PC for post-processing. With Timer/Counter interrupts timestamping sensor samples at 1 ms resolution, 16 MIPS leaves capacity for on-the-fly CRC calculation. The 512 bytes of EEPROM retain configuration and rolling event counters through power loss, and the industrial temperature grade suits loggers mounted in vehicles, pump stations, and outdoor enclosures.
Được đề xuất
Building Automation and Security Nodes
The ATMEGA8515-16JI functions as a distributed control node in building automation: reading door contacts, PIR sensors, and tamper switches on its 35 I/O lines, and reporting over the USART to an RS-485 backbone. The programmable Watchdog Timer with its independent on-chip oscillator restarts a hung node without operator intervention - essential for unattended security devices. Power-down mode reduces standby current to microamp levels between scheduled wake-ups, extending backup-battery runtime during mains outages. The industrial -40C to +85C rating allows installation in unconditioned stairwells, gatehouses, and rooftop equipment rooms. Firmware is field-updatable in-system over the SPI ISP header or a USART bootloader, letting integrators patch logic without desoldering the 44-PLCC device from the PCB.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATMEGA8515-16JI — 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 | ATMEGA8515-16JC | ATMEGA8515L-8JU | ATMEGA162-16JI |
|---|---|---|---|---|
| Package | 44-PLCC (16.6 x 16.6 mm) | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Frequency | 16 MHz | 16 MHz | 8 MHz | 16 MHz |
| Flash Memory | 8 KB | 8 KB | 8 KB | 16 KB |
| SRAM | 512 bytes + up to 64 KB external | 512 bytes + external | 512 bytes + external | 1 KB + external |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 2.7 V to 5.5 V | 4.5 V to 5.5 V |
| Temperature Range | -40C to +85C | 0C to +70C | -40C to +85C | -40C to +85C |
| USART Count | 1 | 1 | 1 | 2 |
Bảo phân biệt quan trọng
- Full industrial temperature rating at full speed (vsATMEGA8515-16JC)
- External memory interface up to 64 KB (vsATMEGA8515L-8JU)
- Documented pin-compatible upgrade path (vsATMEGA162-16JI)
Ghi chú thiết kế
Reserve ports A, C, and part of D before routing I/O if the external memory interface is used: port A is the multiplexed data bus and port C the address bus, leaving only 3 free GPIO lines. Lock this decision at schematic capture - retrofitting external SRAM onto a board that already allocated ports A and C to LEDs and switches is a respin. According to the Microchip ATmega8515 datasheet, ALE must latch the lower address byte, so include a 74x573 latch footprint even if the first build stays internal-SRAM-only.
Decouple VCC and AVCC independently: place 100 nF ceramic capacitors within 5 mm of each VCC pin and a separate 100 nF on AVCC with a 10 uH ferrite or LC filter, especially if the board shares a 5 V rail with relays or PWM motor drivers. The -16JI requires 4.5 V to 5.5 V to guarantee 16 MHz operation; brown-outs below this cause marginal execution. Enable the internal brown-out detector via fuse bits so the MCU holds reset during supply dips from inrush events.
For PLCC sockets in industrial panels, prefer screw-machined-pin sockets over stamped-pin types - contact resistance stability matters at 5 V logic levels across years of thermal cycling from -40C to +85C. The 16.6 x 16.6 mm PLCC footprint also allows hot-air rework without a stencil, but keep at least 1.5 mm clearance around all four lead rows for nozzle access, and avoid tall adjacent electrolytic capacitors that block vacuum pen placement.
Thông tin tuân thủ
Compliance not explicitly stated in the provided web data. Verify RoHS/lead-free status per order code with the Microchip product page or distributor certificate of conformance, since this mature part exists in multiple manufacturing generations.
