ATMEGA169-16AI - 16MHz AVR LCD MCU 16KB Flash | Microchip
料号： ATMEGA169-16AI ✓ 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 |
ATMEGA169-16AI 概述
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals on one die. Within the power-management hierarchy of embedded systems, an MCU sits above discrete logic and below application processors, making it the standard choice for dedicated control tasks such as metering, appliances, and human-machine interfaces.
Key features include the AVR enhanced RISC architecture with 130 powerful instructions, most executing in a single clock cycle, and 32 general-purpose working registers. The self-programming Flash supports in-system programming (ISP), while the JTAG boundary-scan and on-chip-debug capability accelerates development. The built-in LCD driver with up to 4 common x 25 segment drive capability eliminates an external LCD controller, saving board space and bill-of-materials cost.
Technically, the ATmega169 combines Harvard-architecture pipelining with low-power CMOS process technology, achieving 16 MIPS at 16 MHz while supporting 2.7 V to 5.5 V operation for both battery and 5 V industrial rails. Power-saving modes (idle, power-down, power-save) extend battery life in portable instruments.
Typical applications include handheld multimeters and measuring instruments with LCD displays, utility metering, battery-powered portable devices, and industrial control panels requiring a segment-LCD human-machine interface.
Design consideration: the LCD driver segment/commons configuration must match the panel matrix; verify the 4-common biasing scheme against your LCD specification before layout.
This page synthesizes distributor pricing and stock data, same-package drop-in alternatives from the ATmega LCD family, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： ATMEGA169-16AI ——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： ATMEGA169-16AI （相同外形与封装尺寸） ——差异在于 Operating Temperature, Package, Flash Memory, Instruction Set, Throughput.
快速对比工具——选择替代料号进行并排对比：
ATMEGA169P-16AU
✅ 直接替换📋 参考替代料（不在目录中）
ATMEGA169-16AU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$3.6 / 个
查看数据手册 →ATMEGA165-16AI
✅ 直接替换✓ 有现货
$3.45 / 个
查看数据手册 →ATMEGA325-16AI
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATMEGA169-16AI 最大额定值与电气特性
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 16 MHz |
| Throughput | 16 MIPS at 16 MHz |
| Flash Program Memory | 16KB (8K x 16), self-programming |
| SRAM | 1KB |
| EEPROM | 512B |
| Instructions | 130 (most single-cycle) |
| General Purpose Registers | 32 x 8 |
| ADC | 8-channel, 10-bit |
| LCD Driver | 4 x 25 segment |
| Debug Interface | JTAG (on-chip-debug and boundary scan) |
| Operating Voltage | 2.7 V to 5.5 V |
| 工作温度 | -40C to +85C (Industrial) |
| 封装 | 64-TQFP (14x14 mm) |
| 安装类型 | Surface Mount |
| Architecture | AVR enhanced RISC |
ATMEGA169-16AI 64-tqfp (14x14 mm) 引脚配置指南
ATMEGA169-16AI（64-tqfp (14x14 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： ATMEGA169-16AI.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATMEGA169-16AI 适用于 6 应用s: Handheld Measurement Instruments, Utility and Energy Metering, Industrial Control Panels, Portable Battery-Powered Devices, HVAC and Appliance Controllers, Embedded Development and Education.
Handheld Measurement Instruments
The ATMEGA169-16AI fits handheld multimeters, LCR meters, and environmental meters because it combines a 16 MHz / 16 MIPS AVR core with an on-chip 8-channel 10-bit ADC for measurement capture and a 4 x 25 segment LCD driver for the display, all in one 64-TQFP. The single-chip integration removes the external LCD controller that a generic MCU would require, cutting board area and battery load. Its 2.7 V to 5.5 V supply range tolerates discharging battery packs, while power-down and power-save sleep modes extend shelf life between uses. Performance consideration: ADC accuracy depends on VCC stability, so add a clean reference and decoupling for best resolution.
推荐
Utility and Energy Metering
In electricity, water, and heat meters the ATMEGA169-16AI drives the segment LCD readout directly with its 4-common x 25-segment driver while the 10-bit ADC samples sensor or shunt inputs. Self-programming Flash allows calibration data and firmware to be updated in the field through the JTAG or ISP interface, an important serviceability feature for deployed meters. Industrial -40C to +85C temperature rating covers outdoor and plant installations. Performance consideration: the ADC reference and front-end filtering determine metering accuracy; budget a precision voltage reference and adequate oversampling since the on-chip converter is 10-bit rather than metering-grade sigma-delta.
推荐
Industrial Control Panels
For industrial controllers and panel instruments the ATMEGA169-16AI provides 16 MIPS of deterministic single-cycle RISC execution at 16 MHz, 32 GPIO-class port pins multiplexed with the LCD function, and JTAG boundary scan for production test. The 5.5 V upper supply limit supports legacy 5 V industrial logic levels directly, simplifying interfacing with optocouplers and relays. The on-chip 512B EEPROM retains setpoints and counters through power cycles without external nonvolatile memory. Performance consideration: in electrically noisy cabinets, keep the ADC traces short, decouple AVCC separately, and use the internal watchdog plus brown-out detection to guarantee recovery from supply dips.
推荐
Portable Battery-Powered Devices
Battery chargers, data loggers, and portable testers benefit from the ATMEGA169-16AI's combination of 2.7 V minimum supply, multiple sleep modes, and integrated display drive. A 3-cell alkaline stack (about 4.5 V nominal) powers the device across its entire operating range without a regulator, and the power-save sleep mode keeps only the LCD and timer domains alive between measurements. The 16 MHz clock can be scaled down at runtime to trade throughput for current. Performance consideration: for the longest runtime, qualify the picoPower ATMEGA169P-16AU drop-in, which shares the same footprint and firmware compatibility while improving sleep currents.
推荐
HVAC and Appliance Controllers
Thermostats, boiler controllers, and white-goods interfaces use the ATMEGA169-16AI to render temperature and status on a segment LCD while the 10-bit ADC reads NTC sensors on up to eight channels. The -40C to +85C industrial rating covers unconditioned spaces such as attics and mechanical rooms. In-system programmable Flash allows one firmware image to be configured per product variant on the assembly line via ISP. Performance consideration: mains-connected appliances must respect creepage and EMI constraints - keep the MCU ground referenced to the low-voltage domain and filter the LCD drive lines to prevent visible flicker from switching-noise coupling.
推荐
Embedded Development and Education
The ATMEGA169-16AI is popular for learning and prototyping because JTAG on-chip debugging exposes registers and memory on live hardware, and community toolchains (including AVR-GCC and the MegaCore Arduino hardware package, which explicitly supports ATmega169) lower the entry barrier. The self-programming Flash supports bootloader-based updates over UART, so no dedicated programmer is needed after initial provisioning. The 130-instruction AVR ISA is well documented and assembly-friendly. Performance consideration: educators and hobbyists should note this is a 5 V-class part; interface carefully with 3.3 V peripherals or level-shift, since I/O above VCC + 0.5 V is not permitted.
推荐
推荐产品汇总
工程参考数据： ATMEGA169-16AI ——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 | ATMEGA169P-16AU | ATMEGA169-16AU | ATMEGA165-16AI | ATMEGA325-16AI |
|---|---|---|---|---|---|
| Package | 64-TQFP (14x14 mm) | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 16KB | 16KB | 16KB | 16KB | 32KB |
| SRAM | 1KB | 1KB | 1KB | 1KB | 2KB |
| Max Speed | 16 MHz (16 MIPS) | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| LCD Driver | 4 x 25 segments | 4 x 25 segments | 4 x 25 segments | LCD driver (verify segment count) | LCD driver (verify segment count) |
| Operating Voltage | 2.7 V to 5.5 V | 1.8 V to 5.5 V (picoPower) | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Low-Power Technology | Standard AVR power modes | picoPower (lower sleep current) | Standard AVR power modes | Standard AVR power modes | Standard AVR power modes |
关键差异点
- Integrated 4 x 25 segment LCD driver （对比 ATMEGA168-20AU)
- Industrial temperature rating as standard （对比 ATMEGA169-16AU)
- picoPower upgrade path at zero footprint cost （对比 ATMEGA169P-16AU)
- JTAG on-chip debug and boundary scan （对比 ATMEGA328P)
设计说明
Decouple VCC and AVCC separately: place a 100 nF ceramic capacitor within a few millimeters of each VCC pin and another on AVCC, plus bulk 10 uF near the regulator. Connect AVCC to VCC through an LC filter (ferrite bead plus capacitor) when using the 10-bit ADC, since digital switching noise on AVCC directly degrades ADC effective resolution. Enable the internal brown-out detector (BOD) at an appropriate threshold for your supply so the MCU does not execute corrupted code during battery collapse or mains brownouts.
The 64-TQFP (14x14 mm) land pattern follows the standard 0.5 mm pitch TQFP footprint; use the package drawing in the manufacturer datasheet for exact pad dimensions. Route the LCD segment and common lines as short, grouped buses away from the crystal and ADC inputs to avoid coupling that appears as ghost segments on the display. JTAG pins ( TCK, TMS, TDO, TDI) double as port pins - add series resistors if in-circuit debug access is needed after programming, and keep an unpopulated 2x5 JTAG header footprint for production test.
JTAG enable: the JTAG interface is enabled by default on ATmega169 parts via the JTAGEN fuse; if you repurpose those pins as GPIO you must clear the fuse, otherwise pins behave unexpectedly. Clock safety: at 16 MHz over the full 2.7-5.5 V range, use a crystal rather than the internal RC oscillator for UART timing accuracy. Temperature grading: the 'AI' suffix denotes the industrial -40C to +85C part - do not substitute the commercial 'AU' variant in cold or outdoor products without verifying the grade.
合规信息
Compliance status not explicitly stated in the retrieved distributor data for this specific orderable part number. Confirm via Microchip product page or distributor material declarations before use in regulated products.