ATMEGA162L-8PI - 8MHz AVR 16KB Flash MCU DIP-40 | Microchip
MPN： ATMEGA162L-8PI ✓ 啟用中ATMEGA162L-8PI 概覽
An 8-bit AVR microcontroller is a reduced-instruction-set (RISC) computing device that executes most instructions in a single clock cycle; within the power-management IC hierarchy it functions as the central embedded controller, combining CPU, program memory, data memory, timers, communication interfaces and general-purpose I/O in a single chip. The AVR ATmega family sits in the broader microcontroller taxonomy alongside ARM Cortex-M, PIC, 8051 and MSP430 architectures.
Key features include the Advanced RISC architecture with 133 powerful instructions, most executing in a single clock cycle; 32 x 8-bit general-purpose working registers; two hardware USARTs for dual serial channels; a JTAG (IEEE 1149.1 compliant, per family documentation) on-chip debug and boundary-scan interface; and a wide supply voltage range of 2.7 V to 5.5 V, which is what the L suffix in the part number denotes. The PI suffix indicates the industrial temperature grade (-40 C to +85 C) in the plastic DIP package, making the part suitable for uncontrolled-environment deployments.
Technically, the ATmega162 pairs its AVR core with a two-stage pipeline, hardware multiply, and a rich peripheral set including 8-bit and 16-bit timers with PWM outputs, an 8-channel 10-bit ADC in the family, and an external memory interface. In-system programmable Flash with a boot-loader section allows firmware updates over UART without removing the device from the board.
Typical applications include legacy industrial control equipment, through-hole prototyping and education platforms, dual-UART communication nodes, and motor or lighting control systems where 5 V logic compatibility matters.
A key design consideration: the ATmega162L is limited to 8 MHz, so designs needing 16 MHz performance should select the ATMEGA162-16PI, which shares the same DIP-40 footprint.
This page synthesizes verified distributor data, drop-in alternatives and practical design notes not found in the manufacturer datasheet alone.
直接替換替代品，適用於 ATMEGA162L-8PI — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ATMEGA162L-8PI （相同外形與佔位） — 差異在於 Instruction Set, Package, Flash Program Memory, Operating Temperature, EEPROM.
ATMEGA162-16PI
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA162-16PC
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA162L-8PC
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ATMEGA161L-4PI
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA16-16PI
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATMEGA162L-8PU
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ATMEGA162L-8PI 最大額定值與電氣特性
| Core Architecture | AVR 8-bit RISC |
| Core Size | 8-bit |
| 最大時脈頻率 | 8 MHz |
| Flash Program Memory | 16 KB (8K x 16) |
| SRAM Data Memory | 1 KB |
| EEPROM | 512 x 8 bytes |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Instruction Set | 133 powerful instructions, most single-cycle |
| Working Registers | 32 x 8-bit general purpose |
| Package Type | 40-PDIP (0.600 in, 15.24 mm) |
| 安裝方式 | Through Hole |
| Operating Temperature Grade | I = Industrial (-40C to +85C) |
| 資料匯流排寬度 | 8 bit |
| Communication Interfaces | 2x USART (dual UART), SPI, TWI |
| Timers | 8-bit and 16-bit timers with PWM |
| Program Memory Type | Flash (in-system self-programmable) |
| Life Cycle Stage | Active |
ATMEGA162L-8PI 40-pdip (0.600 in, 15.24 mm) 腳位配置指南
ATMEGA162L-8PI（40-pdip (0.600 in, 15.24 mm) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： ATMEGA162L-8PI.
請參閱 資料表 以查看完整腳位配置。
典型應用
ATMEGA162L-8PI 適用於 6 應用s: Legacy Industrial Control Equipment, Through-Hole Prototyping and Education, Dual-UART Communication Nodes, Motor and Lighting Control, Battery-Powered Embedded Systems, External-Memory and Data-Logging Systems.
Legacy Industrial Control Equipment
The ATMEGA162L-8PI fits industrial control retrofits because its 2.7 V to 5.5 V supply tolerance rides through unregulated 24 V-derived rails that sag during motor inrush, while the industrial -40C to +85C grade matches control-cabinet environments. Its 16 KB Flash accommodates state-machine and PID control code compiled with avr-gcc, and the 512 B EEPROM stores setpoints and calibration constants across power cycles. The dual hardware USARTs allow a Modbus RTU fieldbus link and a service diagnostic port simultaneously without software UART overhead. In these boards the MCU typically scans digital inputs at 1 ms rates, drives relay outputs via 8-bit timer PWM, and reports status over RS-485, with the 8 MHz clock providing ample margin for single-cycle RISC execution of control math.
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Through-Hole Prototyping and Education
The 40-pin 0.600-inch PDIP package makes the ATMEGA162L-8PI a natural fit for breadboards, ZIF sockets and student lab boards: no hot-air rework, easy replacement after wiring mistakes, and visible pin mapping that aids instruction. The 5 V logic matches bench supplies, op-amp modules and hobby peripherals, while the 2.7 V floor allows battery experiments. The in-system programmable Flash works with a simple SPI ISP header and free AVRDude tooling, and the dual USARTs let one channel feed a PC terminal while the other drives an LCD or sensor module - an effective way to teach serial protocols. The 32 general-purpose registers and single-cycle instruction execution give predictable, teachable timing behavior for assembly-language courses.
推薦
Dual-UART Communication Nodes
The ATmega162 is one of the few ATmega devices with two complete hardware USARTs, making the ATMEGA162L-8PI ideal for protocol-translation and gateway nodes - for example bridging RS-232 field devices to RS-485 networks or forwarding modem data to a local display. Each USART supports synchronous and asynchronous modes with independent baud-rate generators, so 9600-baud device links and 115200-baud backhaul channels run concurrently in hardware with zero bit-bang CPU load. At 8 MHz with single-cycle RISC execution, the core sustains both full-duplex channels plus framing and checksum processing with margin to spare. Buffer management uses the 1 KB SRAM for ring buffers, and the boot-loader Flash section permits field firmware updates over either UART without removing the chip.
推薦
Motor and Lighting Control
The ATMEGA162L-8PI drives DC motor and lighting loads through its 8-bit and 16-bit timers with PWM outputs: the 16-bit timer generates precise phase-correct PWM for motor speed control while an 8-bit timer handles auxiliary LED dimming or fan speed. The external memory interface frees SRAM expansion for complex motion profiles, and the ADC (in family configuration) reads potentiometers and current-shunt feedback for closed-loop operation. The industrial temperature grade and 5 V noise immunity suit electrically noisy environments near motor drivers. Because PWM edges are generated in hardware, firmware jitter is eliminated - critical for audible-noise control in lighting dimmers - while the 8 MHz core executes PI loop math in microseconds, supporting kilohertz-range control bandwidths typical of embedded motor applications.
推薦
Battery-Powered Embedded Systems
The L-grade 2.7 V to 5.5 V operating range lets the ATMEGA162L-8PI run directly from a 3 V lithium cell or a 2.7 V-cutoff boost converter without a regulator, and AVR power-management modes (idle, power-down, power-save) extend battery life by halting the core between tasks. A typical node sleeps in power-down drawing only microamp-level family-typical current, wakes on USART edge or external interrupt, samples sensors, transmits over a UART radio module, and returns to sleep - duty cycles measured in percent. The 512 B EEPROM retains configuration across battery swaps. Designers should note the 8 MHz maximum limits computation-heavy tasks; for radio-stack-heavy designs, budget execution time during early firmware profiling to confirm the sleep/wake schedule meets telemetry deadlines.
推薦
External-Memory and Data-Logging Systems
The ATmega162's external memory interface distinguishes it from smaller ATmega parts: it addresses external SRAM or memory-mapped peripherals directly, expanding beyond the internal 1 KB SRAM for applications such as serial-port loggers that must queue kilobytes of records between flash-write bursts. Data-logging designs pair the MCU's dual USARTs - one capturing a device stream, the other offloading to a host - while the 512 B EEPROM stores rotation counters and configuration. The 8 MHz clock sustains sustained 115200-baud capture with CRC computation in firmware. For capacity, designers add a standard 32 KB SRAM on the external bus; the interface reduces effective access speed via wait states, so throughput-critical code should keep hot data internal and use external memory for buffered records.
推薦
推薦產品摘要
工程參考資料，適用於 ATMEGA162L-8PI — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ATMEGA162-16PI | ATMEGA162-16PC | ATMEGA161L-4PI | ATMEGA16-16PI |
|---|---|---|---|---|---|
| Package | 40-PDIP (0.600 in, 15.24 mm) | 40-PDIP - same | 40-PDIP - same | 40-PDIP - same | 40-PDIP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology (Atmel) | Microchip Technology (Atmel) |
| Max Clock Frequency | 8 MHz | 16 MHz | 16 MHz | 4 MHz | 16 MHz |
| Supply Voltage Range | 2.7 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 2.7 V to 5.5 V | 4.5 V to 5.5 V |
| Flash Program Memory | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Hardware USARTs | 2 | 2 | 2 | 1 | 1 |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C (industrial) | 0C to +70C (commercial) | -40C to +85C (industrial) | -40C to +85C (industrial) |
| Lifecycle Status | Active | Active | Active | Active (legacy) | Active |
主要差異化特點
- Dual hardware USARTs (對比ATMEGA16-16PI)
- Wide 2.7 V to 5.5 V supply range (對比ATMEGA162-16PI)
- External memory interface (對比ATMEGA161L-4PI)
設計說明
Decouple VCC (pin 10) and AVCC with 100 nF ceramic capacitors placed within 5 mm of the pins, plus a 10 uF bulk capacitor near the socket. The L-grade 2.7 V floor means brownout detection must be configured for the correct threshold via the fuse bits - set BODEN and BODLEVEL so the device resets cleanly before the 2.7 V minimum rather than running out of spec. On 5 V boards shared with relays or motors, add a series ferrite between the noisy rail and VCC to keep the analog supply clean.
Clock selection is fuse-programmed, not code-programmed: a factory-fresh ATmega162L ships on the internal 1 MHz RC oscillator, so forgetting to set the CKOPT/CKSEL fuses for the external 8 MHz crystal is the most common 'chip runs slow' support issue. Also note the L-grade parts must not be fused for 16 MHz operation - that exceeds the L-grade speed-voltage envelope. When substituting ATMEGA162-16PI for the L part in a running design, verify the brownout fuse level matches the new 4.5 V minimum.
On through-hole boards, route the XTAL1/XTAL2 crystal traces short and symmetric with ground guards on both sides to suppress spurious oscillation, especially for crystals above 4 MHz. Keep the two USART TX/RX pairs away from relay and PWM return paths to avoid crosstalk glitches. If using the external memory interface, add 22-33 ohm series resistors on AD0-AD7 and ALE to dampen ringing on longer ribbon or socket-bus runs.
合規資訊
Compliance status not stated in the provided verified web data. Confirm RoHS/REACH/lead-free status on the official Microchip ATMEGA162L-8PI product page or request a certificate of compliance from Microchip for the specific date code.
