ATMEGA169L-8AI - 8-bit AVR MCU 16KB Flash LCD Driver | Microchip
部品番号: ATMEGA169L-8AI ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $5.2 | $5.20 |
| 10 | $4.72 | $47.20 |
| 100 | $4.25 | $425.00 |
| 500 | $3.85 | $1,925.00 |
| 1,000 | $3.5 | $3,500.00 |
ATMEGA169L-8AI 概要
An AVR 8-bit microcontroller is a reduced instruction set computer (RISC) device in the broader hierarchy of MCU -> embedded processor -> semiconductor. The ATmega AVR family is widely used in embedded systems because its 130-instruction, mostly single-cycle architecture delivers up to 16 MIPS throughput at 16 MHz, combining near-DSP efficiency with low power consumption.
Key features of the ATMEGA169L-8AI include the on-chip 4x25 segment LCD driver, which eliminates an external LCD controller in metering and display applications; an 8-channel 10-bit analog-to-digital converter; a JTAG interface for on-chip debugging and boundary scan; and self-programming Flash supporting in-system bootloader firmware updates. The L suffix denotes the low-voltage variant (down to 2.7 V), and the AI suffix denotes industrial temperature and TQFP tray packaging.
Architecturally, the device couples an advanced RISC core with 32 general-purpose working registers directly connected to the ALU, allowing two independent registers to be accessed in one instruction executed in one clock cycle. Harvard architecture separates program and data buses, sustaining one MIPS per MHz of clock frequency, which lets designers trade clock speed for power savings.
Typical applications include utility and energy meters with segment LCDs, portable battery-powered instruments, industrial control panels, and human-machine interface nodes where the LCD driver, ADC, and JTAG debug reduce bill-of-materials count.
A key design consideration: at 5 V the maximum rated clock is 8 MHz for the L-grade part, so verify voltage-frequency operating curves before overclocking; also reserve JTAG fuse settings carefully, as disabling JTAG is irreversible without parallel programming.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
ドロップイン代替品: ATMEGA169L-8AI — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: ATMEGA169L-8AI （同一形状・フットプリント） — 相違点: EEPROM, General Purpose I/O, LCD Controller, Operating Temperature, Timers.
クイック比較ツール — 並列比較する代替部品を選択:
ATMEGA169V-8AI
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$2.58 / 個
データシートを見る →ATMEGA169A-AU
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$2.98 / 個
データシートを見る →ATMEGA169PA-AU
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ATMEGA329A-AU
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$3.31 / 個
データシートを見る →ATMEGA649A-AU
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ATMEGA169L-8AI 最大定格＆電気的特性
| Core Architecture | AVR 8-bit RISC |
| Core Speed | 8 MHz |
| Flash Program Memory | 16 KB (8K x 16) |
| SRAM | 1 KB |
| EEPROM | 512 bytes |
| ADC Channels | 8 channels, 10-bit |
| LCD Driver | 4x25 segment |
| JTAG Interface | Yes (on-chip debug and boundary scan) |
| MIPS Throughput | up to 16 MIPS at 16 MHz (family max) |
| Instructions | 130 instructions, most single-cycle |
| 動作温度 | -40C to +85C (industrial, I suffix) |
| パッケージ | 64-TQFP (14x14 mm) |
| 実装タイプ | Surface Mount |
| Packing | Tray |
ATMEGA169L-8AI 64-tqfp (14x14 mm) ピン配置ガイド
ATMEGA169L-8AI (64-tqfp (14x14 mm) パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: ATMEGA169L-8AI.
詳細は データシート をご参照ください。
主な用途
ATMEGA169L-8AI の用途: 6 件s: Utility and Energy Metering, Portable Battery-Powered Instruments, Industrial Control Panels and HMIs, Automotive and Marine Dash Clusters, Thermostats and Smart Home Climate Control, Test and Measurement Debug Tooling.
Utility and Energy Metering
Electricity, water, and gas meters are the classic home of the ATMEGA169L-8AI because the on-chip 4x25 segment LCD driver displays consumption readings directly, removing an external LCD controller from the bill of materials. The 8-channel 10-bit ADC samples current-sensor and voltage-divider inputs for measurement front-ends, while the 1 KB SRAM holds running tariff calculations. The L-grade 2.7 V minimum supply suits battery-backed or low-voltage meter electronics, and the self-programming Flash supports field firmware updates for tariff changes. Designers typically sleep the CPU between measurement cycles and let the LCD controller keep running, minimizing average current draw in always-on metering products.
おすすめ
Portable Battery-Powered Instruments
Handheld measurement tools benefit from the ATMEGA169L-8AI's AVR efficiency of roughly one MIPS per MHz, letting the design run at low clocks to save power while retaining responsive user interfaces. The integrated LCD driver renders measurement readouts, the 10-bit ADC digitizes sensor inputs, and the industrial -40C to +85C rating covers outdoor and workshop use. Because the L variant operates down to approximately 2.7 V, a two-cell alkaline stack supplies the MCU directly without a boost converter, simplifying the power tree. Designers should use the ADC noise-reduction sleep mode during conversions and keep the JTAG fuse disabled in production to reduce static current and secure the firmware.
おすすめ
Industrial Control Panels and HMIs
Machine control panels and operator interfaces use the ATMEGA169L-8AI to combine a bar-graph or character LCD, keypad scanning on GPIO ports, and status I/O in a single 64-TQFP device. The AVR RISC core executes control logic deterministically, while the LCD controller refreshes the panel display without CPU overhead, freeing instruction cycles for communication and interlock logic. The 512-byte EEPROM stores calibration constants and setpoints that must survive power cycles, and the JTAG boundary-scan capability aids production board testing per common panel-manufacturing practice. The industrial temperature grade and robust AVR I/O structure tolerate electrically noisy cabinet environments typical of factory automation.
おすすめ
Automotive and Marine Dash Clusters
Segment-LCD based dashboards for motorcycles, marine gauges, and off-highway equipment fit the ATmega169 architecture well: the 4x25 LCD driver renders speed, fuel, and warning segments while the ADC reads analog sensor outputs such as thermistors and potentiometer position sensors. The -40C to +85C industrial grade of the ATMEGA169L-8AI covers most cabin and dash environments; for fully AEC-Q100-qualified designs, verify the automotive-qualified ATmega169 variants with Microchip before release. Designers typically add TVS protection on sensor inputs and drive the LCD with conservative frame frequencies to limit EMI near radio receivers in compact vehicles.
おすすめ
Thermostats and Smart Home Climate Control
Line-powered and battery-backed thermostats exploit the ATMEGA169L-8AI's combination of LCD display, 10-bit ADC for NTC temperature sensing, and EEPROM for user schedules. The LCD controller drives temperature, mode, and setpoint segments continuously even as the core sleeps in power-down mode, achieving the low average current that defines multi-year thermostat battery life. The self-programming Flash enables OTA-style firmware updates through an application bootloader when a connectivity coprocessor is present. The 2.7 V L-grade operation matches two-cell or lithium primary supplies, and designers should route the ADC's AVCC through an RC filter and use differential or oversampled reads to resolve sub-degree temperature steps.
おすすめ
Test and Measurement Debug Tooling
The ATMEGA169L-8AI's JTAG on-chip-debug capability makes it a convenient core for lab fixtures, debug pods, and instrument front panels where field firmware iteration is routine. Self-programming Flash supports loader-based updates from a host PC, and boundary scan verifies PCB assembly quality on every unit. The 16 KB Flash accommodates protocol stacks and simple DSP-style averaging filters, while the 10-bit ADC with an internal reference digitizes test-point voltages for pass/fail judgments. Fixture designers value the deterministic single-cycle instruction timing for precise pulse generation, using timer outputs rather than software delays to guarantee timing accuracy across the full industrial temperature range.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: ATMEGA169L-8AI — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | ATMEGA169V-8AI | ATMEGA169PA-AU | ATMEGA329A-AU | ATMEGA649A-AU |
|---|---|---|---|---|---|
| Package | 64-TQFP (14x14 mm) | 64-TQFP - same | 64-TQFP - same | 64-TQFP - same | 64-TQFP - same |
| Brand | Microchip Technology (Atmel legacy) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 16 KB | 16 KB | 32 KB | 64 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 2 KB | 4 KB |
| JTAG Debug | Yes | Yes | Yes | Yes | Yes |
| Power Profile | Standard low-voltage AVR | Low-voltage optimized | picoPower, lowest sleep current | Standard | Standard |
主な差別化要因
- Integrated 4x25 LCD driver （vs ATMEGA168PB-AUR)
- Lower power in production designs （vs ATMEGA169L-8AI (this part))
- Memory headroom for migration （vs ATMEGA329A-AU / ATMEGA649A-AU)
設計ノート
Respect the L-grade voltage-frequency operating envelope: the ATMEGA169L-8AI is specified at up to 8 MHz across its 2.7 V to 5.5 V range, so do not clock it like a 20 MHz V-grade part. If the board must run faster, migrate to the pin-compatible ATMEGA169A/PA 16 MHz grades instead of overclocking. Decouple VCC and AVCC separately with 100 nF ceramics plus bulk capacitance, and filter AVCC through an LC or RC network to protect the 10-bit ADC's effective number of bits.
Fuse configuration is the most common ATmega169 failure mode in production. Disabling the JTAGEN fuse is irreversible without a parallel high-voltage programmer on this family, so lock out accidental JTAG disable during development. Also verify the M103C/M169 compatibility fuse behavior and the LCD clock source selection: an incorrect LCD prescaler setting can render the display blank or overdrive it, shortening panel life. Always read back fuses after programming on the first article.
The 64-TQFP devotes many pins to LCD segment lines that share GPIO functions; route LCD traces away from the ADC input lines and crystal to prevent capacitive coupling artifacts on conversions. Use a ground pour under the crystal with short XTAL1/XTAL2 traces, and break analog and digital ground regions at a single point near the ADC. For meters with mains-side sensing, keep creepage and clearance per the applicable product safety requirements rather than generic defaults.
コンプライアンス情報
Compliance statements must be confirmed against Microchip's official certificate for the specific date code; the provided web data does not include compliance details.