ATMEGA8515L-8JI - 8MHz AVR MCU 8KB Flash 44-PLCC | Microchip
N.º da peça: ATMEGA8515L-8JI ✓ Ativo| Qtd. | Preço unitário | Total |
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| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1.000 | $0 | $0,00 |
ATMEGA8515L-8JI Visão geral
An AVR ATmega microcontroller is a member of the 8-bit microcontroller family built on the AVR enhanced RISC architecture, in which most of its 130 powerful instructions execute in a single clock cycle. Within the system hierarchy, it sits at the level of an MCU (microcontroller unit), integrating CPU, program memory, data memory, peripherals, and I/O ports in one chip for embedded control applications.
Key features include fully static operation, up to 8 MIPS throughput at 8 MHz (the family scales to 16 MIPS at 16 MHz), and an external memory interface (EBI/EMI) that addresses up to 64 KB of external SRAM - a distinctive capability of the ATmega8515 within the AVR portfolio. The device also provides SPI and UART/USART serial interfaces, flexible interrupt handling, and in-system programmable flash for firmware updates without removing the chip from the board.
Architecturally, the ATmega8515 couples an AVR RISC core with Harvard memory organization, 32 general-purpose working registers directly connected to the ALU, and dedicated timer/PWM and serial peripherals. The 44-PLCC package exposes four 8-bit general-purpose I/O ports (PA, PB, PC, PD) plus the additional Port E function pins, with J-leads suited to through-hole-style PLCC sockets that simplify replacement during prototyping and field service.
Typical applications include industrial control and automation, legacy embedded equipment maintenance, communication interfaces using UART and SPI, and motor or relay control tasks where external memory expansion is required.
For design work, note that the "L" variant is rated for 8 MHz maximum clock; designs needing 16 MHz operation should select the ATMEGA8515-16x speed grade instead, and supply voltage range must be confirmed against the datasheet before reuse across speed grades.
This page synthesizes distributor listings, drop-in alternative cross-references, and practical design guidance not consolidated in the manufacturer datasheet.
Alternativas drop-in para ATMEGA8515L-8JI — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com ATMEGA8515L-8JI (mesmo formato e footprint) — diferindo em Package, Communication Interfaces, Core Architecture, Throughput, External Memory Interface.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ATMEGA8515L-8JU
✅ Drop-In✓ Em estoque
$6.9 / unidade
Ver ficha técnica →ATMEGA8515-16JI
✅ Drop-In✓ Em estoque
$5.44 / unidade
Ver ficha técnica →ATMEGA8515-16JC
✅ Drop-In✓ Em estoque
$2.85 / unidade
Ver ficha técnica →ATMEGA8515-16MJ
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$2.34 / unidade
Ver ficha técnica →AT90S8515-8JI
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ATMEGA8515L-8MJ
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
ATMEGA8515L-8JI Classificações máximas e características elétricas
| Core | AVR 8-bit RISC |
| Frequência máxima de clock | 8 MHz |
| Program Memory Size | 8 KB (4K x 16) FLASH |
| Program Memory Type | In-System Programmable FLASH |
| SRAM Size | 512 B internal (544 B including 32 general purpose registers) |
| External SRAM Support | Up to 64 KB |
| EEPROM Size | 512 B |
| Instruction Set | 130 powerful instructions, most single-clock-cycle |
| Throughput | Up to 8 MIPS at 8 MHz (family scales to 16 MIPS at 16 MHz) |
| Communication Interfaces | SPI, UART/USART, EBI/EMI external memory interface |
| Timers/Counters | Two 8-bit, one 16-bit with PWM outputs |
| ADC | Not present (no on-chip ADC on ATmega8515) |
| I/O Ports | 4 x 8-bit general purpose ports plus Port E function pins |
| Encapsulamento | 44-PLCC (J-lead), 16.6 x 16.6 mm |
| Tipo de montagem | Surface Mount |
Guia de Configuração de Pinos do ATMEGA8515L-8JI 44-plcc (j-lead), 16.6 x 16.6 mm
Configuração de pinos para ATMEGA8515L-8JI (pacote 44-plcc (j-lead), 16.6 x 16.6 mm). Este CI digital inclui GPIO, interfaces de comunicação (UART, SPI, I2C) e pinos de alimentação. Consulte o datasheet do fabricante para funções alternativas dos pinos e opções de configuração. Essencial para projeto de sistemas embarcados e layout de PCB.
Nenhum dado detalhado de pinagem disponível para ATMEGA8515L-8JI.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
ATMEGA8515L-8JI é adequado para 6 aplicaçãos: Industrial Control and Automation, Legacy Equipment Repair and Maintenance, External Memory Expansion Systems, Serial Communication Interfaces, PWM and Timer-Based Control, Education and Prototyping.
Industrial Control and Automation
The ATMEGA8515L-8JI fits industrial control because its AVR RISC core executes most of its 130 instructions in a single clock cycle, giving deterministic timing for relay sequencing, motor start-stop logic, and sensor polling at up to 8 MIPS at 8 MHz. Four 8-bit I/O ports (PA through PD) provide up to 32 GPIO lines that drive optocouplers, relays, and indicator LEDs directly with appropriate buffering. The UART/USART supports serial links to HMIs and field devices, while SPI connects external ADCs or EEPROMs. The 44-PLCC socketed package allows field firmware and chip replacement without board rework, a practical advantage for long-life industrial equipment maintenance.
Recomendado
Legacy Equipment Repair and Maintenance
Legacy embedded equipment designed around the Atmel ATmega8515 or AT90S8515 in PLCC-44 sockets is a natural fit for the ATMEGA8515L-8JI, which is pin-to-pin compatible with these predecessors on the same 16.6 x 16.6 mm footprint. Service engineers can replace a failed or EOL device directly into the existing socket and reprogram the 8 KB ISP FLASH in-system over SPI. Because the 'L' grade runs the same 8 MHz clock as most legacy designs, firmware does not require re-timing. The ATMEGA8515L-8JU lead-free variant is a like-for-like substitute where RoHS-compliant repairs are required by regulation or customer contract.
Recomendado
External Memory Expansion Systems
The defining feature of the ATmega8515 within the AVR portfolio is its external memory interface (EBI/EMI), which addresses up to 64 KB of external SRAM - a capability the ATMEGA8515L-8JI provides from its own 512 B of internal SRAM. Applications such as data loggers, buffering systems, and protocol analyzers map large external SRAM arrays onto Port A (address/data) and Port C via the EBI, while the UART streams results to a host. Running at 8 MHz, the core sustains roughly 8 MIPS for memory-move and checksum workloads. This makes the device well suited where 8 KB flash suffices but working memory must be far larger.
Recomendado
Serial Communication Interfaces
With a hardware UART/USART and SPI interface, the ATMEGA8515L-8JI serves well as a serial protocol converter, RS-485 node, or SPI peripheral bridge in 8 MHz embedded systems. The UART supports standard asynchronous baud rates derived from the 8 MHz clock for links to PCs, modems, and industrial buses, while the SPI master/slave port connects EEPROMs, RTCs, displays, and external ADCs at multi-megabit rates. The 130-instruction single-cycle AVR core keeps interrupt latency short and deterministic, which is important for reliable framing and CRC handling. The 44-PLCC package's GPIO complement also allows bit-banged protocols such as 1-Wire or I2C when needed.
Recomendado
PWM and Timer-Based Control
The ATMEGA8515L-8JI integrates two 8-bit timers and one 16-bit timer with output-compare channels generating PWM outputs (OC0, OC1A, OC1B), making it suitable for LED dimming, DC motor speed control, and servo pulse generation. At an 8 MHz clock, the 16-bit timer delivers fine PWM resolution, and single-cycle instruction execution keeps control-loop interrupts responsive. Combined with the UART for setpoint updates and up to 64 KB external SRAM for waveform tables, the device implements complete closed-loop controllers. The Port E analog-comparator inputs (AIN0/AIN1) support simple threshold sensing without an external comparator in many designs.
Recomendado
Education and Prototyping
The ATMEGA8515L-8JI is well suited to university labs, AVR training boards, and hobby prototyping because the PLCC-44 package seats into low-cost ZIF-style PLCC sockets, allowing students to swap chips without soldering. The classic AVR architecture - 32 registers, 130 single-cycle instructions, ISP flashing over SPI - remains a standard teaching platform, and abundant legacy tutorials and assembler examples target the ATmega8515 specifically. The external memory interface also demonstrates memory-system concepts (address latching, wait states) rarely exposed on smaller AVRs. At 8 MHz with 8 KB flash it matches the classic AVR development board configurations still in circulation.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ATMEGA8515L-8JI — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | ATMEGA8515L-8JU | ATMEGA8515-16JI | ATMEGA8515-16JC | AT90S8515-8JI |
|---|---|---|---|---|---|
| Package | 44-PLCC (16.6x16.6) | 44-PLCC (16.6x16.6) - same | 44-PLCC (16.6x16.6) - same | 44-PLCC (16.6x16.6) - same | 44-PLCC (16.6x16.6) - same |
| Brand | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) |
| Max Clock Frequency | 8 MHz | 8 MHz | 16 MHz | 16 MHz | 8 MHz |
| Flash Program Memory | 8 KB (4K x 16) | 8 KB (4K x 16) | 8 KB (4K x 16) | 8 KB (4K x 16) | 8 KB |
| SRAM | 512 B (+ up to 64 KB external) | 512 B (+ up to 64 KB external) | 512 B (+ up to 64 KB external) | 512 B (+ up to 64 KB external) | 512 B |
| EEPROM | 512 B | 512 B | 512 B | 512 B | 512 B |
| External Memory Interface | Yes, up to 64 KB | Yes, up to 64 KB | Yes, up to 64 KB | Yes, up to 64 KB | Limited (predecessor implementation) |
| Lead Finish / RoHS Variant | Standard (I suffix) | Lead-free (U suffix) | Standard (I suffix) | Standard (I suffix) | Standard (I suffix) |
| Temperature Grade | Industrial (J) | Industrial (J) | Industrial (I/J) | Commercial (C) | Industrial (J) |
Principais diferenciais
- Low-voltage 8 MHz L speed grade (vs ATMEGA8515-16JI)
- Lead-free plating variant available (vs ATMEGA8515L-8JU)
- Modern ATmega core with external memory interface (vs AT90S8515-8JI)
Notas de projeto
Speed and voltage grade must match: the 'L-8' suffix means the 8 MHz low-voltage speed grade, while ATMEGA8515-16x parts are rated for 16 MHz at higher supply voltage. Substituting a 16 MHz part where firmware timing (UART baud registers, delay loops) was calibrated for 8 MHz changes all derived timings; likewise, running an L-8 part beyond 8 MHz violates its rating. When replacing an -8JI with a -16JI on the same board, confirm the power rail meets the 16 MHz grade's minimum supply voltage per the datasheet ordering-code table.
The 44-PLCC J-lead package is designed for standard PLCC-44 land patterns on a 1.27 mm pitch, and many legacy boards use through-hole PLCC sockets. If designing new, verify the pin-1 corner marking (the PLCC notch and index dot use counter-clockwise pin numbering) against the land pattern, since PLCC orientation errors are a common assembly defect. For reflow with the 'I' (non-lead-free) lead finish, confirm the solder profile compatibility with your process - the 'U' suffix lead-free variant requires a lead-free reflow profile.
The external memory interface (EBI/EMI) drives up to 64 KB of external SRAM across Port A (multiplexed address/data) and Port C; keep external memory traces short and add an address latch (e.g., 74x573) close to the MCU per the datasheet external memory figure. At 8 MHz, ringing and stub reflections are rarely limiting, but series termination near long bus lines improves margin. Decouple VCC and AVCC separately with 100 nF ceramic capacitors placed directly at the package pins, and tie AREF to a clean reference if the analog comparator is used.
Informações de conformidade
The 'I' suffix denotes the standard lead finish; the 'U' suffix variant (ATMEGA8515L-8JU) denotes the lead-free/RoHS-friendly finish per Atmel/Microchip ordering conventions. Exact RoHS/REACH status for the -8JI should be confirmed on the Microchip product page or the distributor compliance certificate.
