ATMEGA8515-16JU - 8KB AVR MCU 16MHz 44-PLCC | Microchip
料号： ATMEGA8515-16JU ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.66 | $4.66 |
| 10 | $4.2 | $42.00 |
| 100 | $3.71 | $371.00 |
| 500 | $3.4 | $1,700.00 |
| 1,000 | $3.1 | $3,100.00 |
ATMEGA8515-16JU 概述
A microcontroller unit (MCU) integrates a processor core, program memory, data memory, and peripherals on a single silicon die, forming the lowest layer of the embedded-system hierarchy beneath system-on-chip (SoC) devices and single-board computers. The ATmega8515 belongs to the AVR 8-bit MCU family, which uses an advanced RISC architecture with 130 powerful instructions, most executing in a single clock cycle, plus 32 general-purpose working registers directly connected to the ALU.
Key features include an external memory interface (a rarity in small AVR parts, enabling up to 64 KB of external SRAM), a full-duplex serial USART, a serial peripheral interface (SPI), two flexible timer/counters with compare modes, internal and external interrupt sources, a programmable watchdog timer, and 35 general-purpose I/O lines. The 16 MHz speed grade delivers 16 MIPS while operating from a 4.5 V to 5.5 V supply.
The AVR core executes most instructions in one clock cycle, achieving near-1 MIPS per MHz efficiency, and supports In-System Programming (ISP) via the SPI port so firmware can be updated after board assembly. Boot-section Flash with Read-While-Write support permits self-programming for field upgrades.
Typical applications include legacy industrial control boards, battery-powered instrumentation, communication adapters using the external memory bus, and hobby/educational systems (the MajorCore Arduino hardware package supports the ATmega8515).
Design consideration: the -16JU is a 5 V commercial-temperature part; for extended temperature range select the -16JI industrial variant in the same 44-PLCC footprint.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： ATMEGA8515-16JU ——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： ATMEGA8515-16JU （相同外形与封装尺寸） ——差异在于 Package, Core Architecture, EEPROM, Communication Interfaces, Operating Temperature.
快速对比工具——选择替代料号进行并排对比：
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 →AT90S8515-16JC
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
AT90S8515-8JI
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATMEGA8535-16JU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$3.35 / 个
查看数据手册 →ATMEGA162-16JU
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATMEGA8515-16JU 最大额定值与电气特性
| Core Architecture | 8-bit AVR RISC |
| Instruction Set | 130 powerful instructions, most single-cycle |
| Flash Memory | 8 KB (4K x 16) In-System Programmable |
| EEPROM | 512 B |
| Internal SRAM | 512 B |
| External SRAM Support | Up to 64 KB via external memory interface |
| 最大时钟频率 | 16 MHz |
| Throughput | 16 MIPS at 16 MHz |
| Supply Voltage (16 MHz grade) | 4.5 V to 5.5 V |
| General Purpose I/O Lines | 35 |
| I/O Ports | 23 |
| Timers | Two flexible Timer/Counters with compare modes |
| Serial Peripherals | USART, SPI (serial programmable) |
| Watchdog Timer | Programmable on-chip |
| Working Registers | 32 general purpose |
| 封装 | 44-PLCC (J-Lead), 16.6 x 16.6 mm, 0.8 mm pitch |
| 工作温度 | 0C to +70C (commercial, -16JU suffix) |
| 安装类型 | Surface Mount |
ATMEGA8515-16JU 44-plcc (j-lead), 16.6 x 16.6 mm, 0.8 mm pitch 引脚配置指南
ATMEGA8515-16JU（44-plcc (j-lead), 16.6 x 16.6 mm, 0.8 mm pitch 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： ATMEGA8515-16JU.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATMEGA8515-16JU 适用于 6 应用s: Legacy Industrial Control Boards, External-Memory Expansion Systems, Serial Communication Adapters, Hobbyist and Educational Platforms, Battery-Powered Measurement Instruments, Firmware Field-Upgradeable Devices.
Legacy Industrial Control Boards
The ATMEGA8515-16JU fits legacy industrial controllers because its 5 V, 4.5 V to 5.5 V supply matches classic industrial logic rails and its 35 general-purpose I/O lines drive relays, optocouplers, and status LEDs without glue logic. The external memory interface supporting up to 64 KB SRAM allows data logging buffers far beyond the internal 512 B, which matters in batching and metering equipment. Per the Microchip datasheet, the two flexible timer/counters with compare modes generate PWM and precise timing for motor and valve control. Placed on a 44-PLCC socketed or soldered footprint, the part supports In-System Programming via SPI, letting field technicians update firmware without desoldering. Design trade-off: the 0C to +70C commercial grade limits deployment in unconditioned cabinets - specify the ATMEGA8515-16JI industrial variant, which is pin-identical, for harsh factory floors.
推荐
External-Memory Expansion Systems
The defining feature of the ATMEGA8515-16JU in this class is its external memory interface: address and data buses multiplexed onto the port pins let the microcontroller address up to 64 KB of external SRAM, per the Microchip product page. This suits data-acquisition loggers, protocol buffers, and graphics frame buffers where 512 B of internal SRAM is insufficient but a 32-bit MCU is overkill. The 16 MIPS throughput at 16 MHz keeps bus transactions fast, while the AVR's single-cycle execution of most of its 130 instructions minimizes wait-state penalties on external accesses. In practice, designers latch the address bus with a 74x573 and add a 5 V SRAM such as a 32K x 8 device. Trade-off: using the external bus consumes most port pins, leaving fewer I/O for peripherals - budget pin allocation early in the schematic.
推荐
Serial Communication Adapters
With a full-duplex serial programmable USART plus SPI, the ATMEGA8515-16JU serves as a protocol bridge between RS-232/RS-485 field buses and SPI peripherals such as EEPROMs, ADCs, and displays. The USART supports standard baud rates from the 16 MHz clock, while the hardware SPI port moves data at up to fosc/2 for fast peripheral exchanges, per the Microchip datasheet feature list. Typical builds include programming adapters, gateways converting serial data to external SRAM queues, and retrofit interfaces for legacy 5 V equipment where 3.3 V MCUs would need level shifters. The programmable watchdog timer provides autonomous recovery in unattended communication nodes. Design consideration: implement the watchdog reset correctly in firmware so long ISRs do not trigger spurious resets, and use 100 nF decoupling on each supply pin to keep SPI edges clean.
推荐
Hobbyist and Educational Platforms
The ATMEGA8515-16JU remains popular in education and hobby projects because the MCUdude MajorCore GitHub project provides a complete Arduino hardware package for the ATmega8515 and ATmega162, bringing Arduino IDE, bootloading, and library support to this classic AVR. The through-hole-friendly legacy and the 44-PLCC socket option make it approachable for breadboard adapters and teaching boards. Its 130 single-cycle-executed RISC instructions and 32 working registers illustrate RISC concepts cleanly in courses, while the external memory interface lets students expand memory hands-on up to 64 KB. Running 16 MIPS at 16 MHz from a forgiving 5 V rail, it tolerates the imperfect wiring typical of prototypes. Trade-off: it is not compatible with UNO shields, so use MajorCore's documented pin map and a dedicated breakout PCB.
推荐
Battery-Powered Measurement Instruments
Handheld instruments built on the ATMEGA8515-16JU benefit from the AVR family's low-power design philosophy and the part's 512 B EEPROM, which retains calibration constants and user settings across power cycles without external non-volatile memory. The device supports a throughput of 16 MIPS at 16 MHz per the Microchip product page, allowing burst-measure-then-sleep strategies that stretch battery life, and the internal RC oscillator option lets low-precision tasks run without a crystal to save board space. Timer/counter compare modes generate measurement gates and display multiplexing clocks directly in hardware. In practice, designers clock the part at reduced frequency in sleep-active duty cycles, since the 16 MHz grade draws the most current. Trade-off: this 5 V commercial part is best for indoor instruments; select the ATMEGA8515-16JI for outdoor or cold-storage environments.
推荐
Firmware Field-Upgradeable Devices
The ATMEGA8515-16JU's In-System Programmable Flash with Read-While-Write capabilities, per the Microchip datasheet, enables boot-loader-based field upgrades: a small boot section rewrites the application firmware over its USART or SPI link after deployment, eliminating product recalls for software fixes. The SPI programming interface also supports production programming in-circuit, so assembled boards are flashed at end-of-line without sockets. The programmable watchdog timer guarantees recovery if an interrupted upgrade loses power mid-write. Typical deployments include networked building controllers and industrial counters where firmware corrections ship annually. Design consideration: reserve adequate boot-section size in the fuse configuration and verify the flash-write voltage margin - the 4.5 V to 5.5 V supply range must be maintained during self-programming, or writes may fail silently.
推荐
推荐产品汇总
工程参考数据： ATMEGA8515-16JU ——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 | ATMEGA8515-16JI | AT90S8515-16JC | ATMEGA8535-16JU | ATMEGA162-16JU |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-PLCC (16.6x16.6) | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same |
| Max Clock / Throughput | 16 MHz / 16 MIPS | 16 MHz / 16 MIPS | 16 MHz | 16 MHz / 16 MIPS | 16 MHz / 16 MIPS |
| Flash / EEPROM | 8 KB / 512 B | 8 KB / 512 B | 8 KB / 512 B | 8 KB / 512 B | 16 KB / 512 B |
| External Memory Interface | Up to 64 KB | Up to 64 KB | Up to 64 KB | No (ADC-focused pin functions) | Yes (extended interface) |
| Operating Temperature | 0C to +70C | -40C to +85C | 0C to +70C | 0C to +70C | 0C to +70C |
关键差异点
- External memory interface up to 64 KB （对比 ATMEGA8535-16JU)
- Commercial-temperature cost advantage （对比 ATMEGA8515-16JI)
- Modern AVR core vs predecessor （对比 AT90S8515-16JC)
设计说明
The -16JU is qualified at 4.5 V to 5.5 V only; the 16 MHz speed grade has no low-voltage operating point. Provide a 5 V +/- 5% regulator with at least 100 nF ceramic decoupling on each supply pin plus a 4.7 uF to 10 uF bulk capacitor near the IC. Do not mix this part into 3.3 V designs - Flash self-programming and timing margins are not guaranteed below 4.5 V. If a 3 V rail is mandatory, select an 8 MHz 'L' grade ATmega8515 variant instead and re-verify timing-critical firmware.
External-memory bus designs must latch the multiplexed address bus (typically with a 74x573 on the ALE-equivalent signal) and add the correct wait states for slow SRAM. Verify that peripheral pin multiplexing is disabled on ports used by the external bus, or bus contention will corrupt reads. When migrating to the ATmega162, follow Microchip application note AVR087 (doc2536) - it is not a blind swap. Finally, configure fuses deliberately: wrong clock-source or boot-size fuses are the most common cause of 'dead' boards after ISP programming.
The 44-PLCC J-lead package has leads on 1.27 mm (0.05 in) centers on all four sides - design the land pattern to the Microchip PLCC-44 drawing in the datasheet (16.6 x 16.6 mm body) rather than scaling a TQFP-44 footprint, because J-lead solder-joint geometry differs from gull-wing. Keep the crystal within 10 mm of XTAL1/XTAL2 with short ground returns, and place 100 nF decouplers at opposite corners of the package. PLCC sockets are acceptable for development but add contact resistance; avoid them in high-frequency or high-vibration production hardware.
合规信息
RoHS/REACH/lead-free status was not stated in the retrieved verified web data for this exact orderable; request the Microchip material declaration sheet or check the DigiKey/Mouser compliance tab before regulated production.
