ATMEGA8515L-8JI - 8MHz AVR MCU 8KB Flash 44-PLCC | Microchip
料号： ATMEGA8515L-8JI ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ATMEGA8515L-8JI 概述
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.
直接替换替代料： ATMEGA8515L-8JI ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ATMEGA8515L-8JI （相同外形与封装尺寸） ——差异在于 Package, Communication Interfaces, Core Architecture, Throughput, External Memory Interface.
快速对比工具——选择替代料号进行并排对比：
ATMEGA8515L-8JU
✅ 直接替换✓ 有现货
$6.9 / 个
查看数据手册 →ATMEGA8515-16JI
✅ 直接替换✓ 有现货
$5.44 / 个
查看数据手册 →ATMEGA8515-16JC
✅ 直接替换✓ 有现货
$2.85 / 个
查看数据手册 →ATMEGA8515-16MJ
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.34 / 个
查看数据手册 →AT90S8515-8JI
✅ 直接替换📋 参考替代料（不在目录中）
ATMEGA8515L-8MJ
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATMEGA8515L-8JI 最大额定值与电气特性
| Core | AVR 8-bit RISC |
| 最大时钟频率 | 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 |
| 封装 | 44-PLCC (J-lead), 16.6 x 16.6 mm |
| 安装类型 | Surface Mount |
ATMEGA8515L-8JI 44-plcc (j-lead), 16.6 x 16.6 mm 引脚配置指南
ATMEGA8515L-8JI（44-plcc (j-lead), 16.6 x 16.6 mm 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： ATMEGA8515L-8JI.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATMEGA8515L-8JI 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： ATMEGA8515L-8JI ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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) |
关键差异点
- Low-voltage 8 MHz L speed grade （对比 ATMEGA8515-16JI)
- Lead-free plating variant available （对比 ATMEGA8515L-8JU)
- Modern ATmega core with external memory interface （对比 AT90S8515-8JI)
设计说明
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.
合规信息
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.
