ATMEGA162L-8AC - 8MHz AVR MCU 16KB Flash TQFP-44 | Microchip
Артикул: ATMEGA162L-8AC ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $6.9 | $6,90 |
| 10 | $6.21 | $62,10 |
| 100 | $5.52 | $552,00 |
| 500 | $4.97 | $2.485,00 |
| 1.000 | $4.48 | $4.480,00 |
ATMEGA162L-8AC Обзор
An 8-bit AVR microcontroller is a single-chip processor based on the AVR enhanced RISC architecture, which executes most of its 131 powerful instructions in a single clock cycle, achieving throughput close to 1 MIPS per MHz. Within the embedded system hierarchy, the MCU sits at the control layer, integrating program memory (Flash), data memory (SRAM), nonvolatile storage (EEPROM), and peripherals such as UARTs, timers, SPI, and an ADC into one device, reducing board count versus discrete logic designs.
Key features include 16KB (8K x 16) self-programmable Flash, 1KB internal SRAM, 512B EEPROM, two 8-bit and one 16-bit timer with PWM capability, two hardware USARTs for dual serial channels, SPI and TWI (I2C) serial interfaces, a 10-bit ADC with up to 8 multiplexed single-ended channels, an on-chip JTAG boundary-scan and debug port, and an external memory interface supporting up to 64KB of optional external SRAM.
Architecturally, the ATmega162 pairs the AVR RISC core with a Harvard-structured memory bus, so instruction fetch and data access occur in parallel. In-system programmability lets firmware be updated after board assembly through SPI, while the JTAG port supports on-chip debugging and boundary-scan testing per the IEEE 1149.1 method used in the AVR family. The low-voltage L variant is rated for operation from 2.7V to 5.5V, suiting 3.3V systems.
Typical applications include industrial control panels, dual-UART communication gateways, building automation nodes, and legacy AVR designs where 5V-tolerant I/O, JTAG debug, and dual serial ports are required. The 35 I/O lines comfortably drive keys, relays, and LED indicators directly.
Design consideration: the L suffix limits safe clocking to 8MHz; to hit 16MHz you must migrate to the ATMEGA162-16AC/AU grade at 4.5V to 5.5V. Keep the RESET pin and JTAG fuse settings in mind during layout.
This page synthesizes distributor pricing, drop-in alternatives, pinout, and practical design notes not found in the manufacturer datasheet alone.
Аналоги без доработки для ATMEGA162L-8AC — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с ATMEGA162L-8AC (тот же форм-фактор и посадочное место) — отличается по Core Architecture, Package, EEPROM, I/O Pins, Communication Interfaces.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
ATMEGA162L-8AU
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
ATMEGA162-16AU
✅ Прямая замена ⚠️ Характеристики не проверены✓ В наличии
$2.45 / шт.
Открыть даташит →ATMEGA162-16AI
✅ Прямая замена ⚠️ Характеристики не проверены✓ В наличии
$2.98 / шт.
Открыть даташит →ATMEGA16-16AU
✅ Прямая замена ⚠️ Характеристики не проверены✓ В наличии
$4.41 / шт.
Открыть даташит →ATMEGA16L-8AU
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
ATMEGA162L-8AC Максимальные параметры и электрические характеристики
| Core Architecture | AVR 8-bit RISC |
| Flash Program Memory | 16KB (8K x 16), In-System Programmable |
| SRAM Data Memory | 1KB |
| EEPROM | 512B |
| Максимальная тактовая частота | 8MHz |
| Instructions | 131, most single-cycle |
| I/O Pins | 35 |
| Timers | Two 8-bit + one 16-bit |
| USART Count | 2 |
| SPI | Yes, 1 channel |
| TWI (I2C) | Yes, 1 channel |
| ADC Resolution | 10-bit |
| JTAG | On-chip debug and boundary scan |
| Корпус | 44-TQFP (10x10 mm) |
| Тип монтажа | Surface Mount |
| Terminal Form | Gull Wing |
| Temperature Grade | Commercial (AC suffix) |
| External Memory Interface | Up to 64KB external SRAM |
Конфигурация выводов ATMEGA162L-8AC
| Контакт 1 | PB0/XCK/T0 — Port B bit 0; USART0 external clock / Timer0 external clock |
| Контакт 2 | PB1/T1 — Port B bit 1; Timer1 external clock input |
| Контакт 3 | PB2/AIN0/INT2 — Port B bit 2; analog comparator input 0 / external interrupt 2 |
| Контакт 4 | PB3/AIN1/OC0 — Port B bit 3; analog comparator input 1 / Timer0 PWM output |
| Контакт 5 | PB4/SS — Port B bit 4; SPI slave select |
| Контакт 6 | PB5/MOSI — Port B bit 5; SPI master output / slave input |
| Контакт 7 | PB6/MISO — Port B bit 6; SPI master input / slave output |
| Контакт 8 | PB7/SCK/OC2 — Port B bit 7; SPI clock / Timer2 PWM output |
| Контакт 9 | RESET — Active-low reset input |
| Контакт 10 | VCC — Digital supply voltage |
| Контакт 11 | GND — Ground |
| Контакт 12 | XTAL2 — Inverting oscillator amplifier output |
| Контакт 13 | XTAL1 — Inverting oscillator amplifier input / external clock input |
| Контакт 14 | PD0/RXD0 — Port D bit 0; USART0 receive |
| Контакт 15 | PD1/TXD0 — Port D bit 1; USART0 transmit |
| Контакт 16 | PD2/INT0 — Port D bit 2; external interrupt 0 |
| Контакт 17 | PD3/INT1 — Port D bit 3; external interrupt 1 |
| Контакт 18 | PD4/XCK1 — Port D bit 4; USART1 external clock |
| Контакт 19 | PD5/OC1A — Port D bit 5; Timer1 output compare A / PWM |
| Контакт 20 | PD6/ICP1 — Port D bit 6; Timer1 input capture |
| Контакт 21 | PD7/OC1B — Port D bit 7; Timer1 output compare B / PWM |
| Контакт 22 | PC0/TMS — Port C bit 0; JTAG test mode select (when JTAG enabled) |
| Контакт 23 | PC1/TDO — Port C bit 1; JTAG test data output (when JTAG enabled) |
| Контакт 24 | PC2/TCK — Port C bit 2; JTAG test clock (when JTAG enabled) |
| Контакт 25 | PC3/TDI — Port C bit 3; JTAG test data input (when JTAG enabled) |
| Контакт 26 | PC4 — Port C bit 4; general purpose I/O / external memory address line |
| Контакт 27 | PC5 — Port C bit 5; general purpose I/O / external memory address line |
| Контакт 28 | PC6 — Port C bit 6; general purpose I/O / external memory address line |
| Контакт 29 | PC7 — Port C bit 7; general purpose I/O / external memory address line |
| Контакт 30 | AVCC — ADC supply voltage |
| Контакт 31 | GND — Ground |
| Контакт 32 | AREF — ADC reference voltage |
| Контакт 33 | PA0/AD0 — Port A bit 0; ADC channel 0 / external memory data bus bit 0 |
| Контакт 34 | PA1/AD1 — Port A bit 1; ADC channel 1 / external memory data bus bit 1 |
| Контакт 35 | PA2/AD2 — Port A bit 2; ADC channel 2 / external memory data bus bit 2 |
| Контакт 36 | PA3/AD3 — Port A bit 3; ADC channel 3 / external memory data bus bit 3 |
| Контакт 37 | PA4/AD4 — Port A bit 4; ADC channel 4 / external memory data bus bit 4 |
| Контакт 38 | PA5/AD5 — Port A bit 5; ADC channel 5 / external memory data bus bit 5 |
| Контакт 39 | PA6/AD6 — Port A bit 6; ADC channel 6 / external memory data bus bit 6 |
| Контакт 40 | PA7/AD7 — Port A bit 7; ADC channel 7 / external memory data bus bit 7 |
| Контакт 41 | PE0/RXD1/PDI — Port E bit 0; USART1 receive |
| Контакт 42 | PE1/TXD1/PDO — Port E bit 1; USART1 transmit |
| Контакт 43 | PE2 — Port E bit 2; general purpose I/O (per datasheet) |
| Контакт 44 | GND — Ground (per datasheet) |
Типичное применение
ATMEGA162L-8AC подходит для 6 применениеs: Industrial Control Panels, Dual-UART Communication Gateways, Building Automation Nodes, Legacy AVR Product Maintenance, Instrumentation and Data Loggers, Motor and PWM Control.
Industrial Control Panels
The ATMEGA162L-8AC fits industrial control and automation panels where 35 I/O lines drive keys, indicators, relays, and opto-isolated inputs directly. The 10-bit ADC reads potentiometers and analog sensor channels, while three timers generate PWM outputs for actuator or heater control. Its 16KB Flash accommodates state-machine logic and communication stacks, and the external memory interface allows SRAM expansion to 64KB if datalogging grows. Because the device is a mature, widely second-sourced AVR in TQFP-44, long-term maintainability of control panel designs is a practical advantage over newer, more volatile part lines.
Рекомендуется
Dual-UART Communication Gateways
With two independent hardware USARTs, the ATMEGA162L-8AC is a natural protocol gateway: one port links to an RS-485 multidrop field bus while the other provides an RS-232 service or diagnostics channel. At 8MHz the AVR core sustains multi-byte buffered serial handling with interrupt-driven ring buffers in the 1KB SRAM. The 512B EEPROM stores node addresses and configuration parameters across power cycles. Compared to bit-banging a second UART on a single-UART device, the second hardware USART eliminates timing jitter, making this part the preferred choice for Modbus-style converters and legacy serial bridges.
Рекомендуется
Building Automation Nodes
In building automation, the ATMEGA162L-8AC serves as a room-controller node combining the TWI (I2C) bus for sensors and displays, the 10-bit ADC for temperature and light-level inputs, and a USART for panel networking. The low-voltage L grade supports 3.3V designs common in modern sensor wiring, while the JTAG port enables in-system firmware updates during commissioning. Its 8MHz clock keeps dynamic power low for continuously powered nodes, and in-system programmable Flash lets field technicians re-flash schedules or setpoints without desoldering the MCU, reducing service cost over installation lifetime.
Рекомендуется
Legacy AVR Product Maintenance
Many legacy products were designed around the ATmega162 family, and the ATMEGA162L-8AC remains the designated replacement for boards with this footprint. Because the die, 44-TQFP package, and pinout are unchanged across the family (ATMEGA162L-8AC/8AU/16AC/16AU/16AI), service organizations can stock one physical footprint and select the grade per environment. The JTAG debug port supports re-entering old code bases for defect analysis, and SPI in-system programming works with existing production fixtures. For end-of-life service inventories, cross-qualifying the L-8 and 16MHz grades maximizes sourcing resilience with a single board layout.
Рекомендуется
Instrumentation and Data Loggers
The ATMEGA162L-8AC suits compact measurement instruments: the 10-bit ADC digitizes sensor channels, timers capture pulse inputs or generate precise sampling intervals, and the dual USARTs send data to both a display controller and a host PC simultaneously. The external memory interface expands RAM to 64KB for buffered datalogging beyond the internal 1KB SRAM, a differentiator versus smaller AVRs. The 512B EEPROM holds calibration constants that survive power loss. With JTAG boundary scan on port C, production test can verify board interconnects before firmware is even loaded, improving first-pass yield on small instrument runs.
Рекомендуется
Motor and PWM Control
For small motor and actuator control, the ATMEGA162L-8AC provides hardware PWM via its timer compare outputs (including OC1A/OC1B channels), enabling closed-loop speed control when combined with ADC feedback from encoders or shunt sensors. The external interrupt pins (INT0/INT1/INT2) accept tachometer pulses, and the 16-bit timer measures period precisely. Two USARTs allow simultaneous command input and telemetry output. At 8MHz, the core executes control-loop math with microsecond-scale latency, sufficient for DC motor and brushless fan control, while the gull-wing TQFP-44 package simplifies automated assembly on control PCBs.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для ATMEGA162L-8AC — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | ATMEGA162L-8AU | ATMEGA162-16AU | ATMEGA162-16AI | ATMEGA16-16AU | ATMEGA16L-8AU |
|---|---|---|---|---|---|---|
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Frequency | 8MHz | 8MHz | 16MHz | 16MHz | 16MHz | 8MHz |
| Flash Memory | 16KB ISP Flash | 16KB | 16KB | 16KB | 16KB | 16KB |
| SRAM | 1KB | 1KB | 1KB | 1KB | 1KB | 1KB |
| USART Count | 2 | 2 | 2 | 2 | 1 | 1 |
| Temperature Range | Commercial (AC) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) |
| I/O Pins | 35 | 35 | 35 | 35 | 32 | 32 |
Ключевые отличия
- Dual hardware USARTs in a 44-pin package (против ATMEGA16-16AU)
- Low-voltage 3.3V operation (против ATMEGA162-16AU)
- External memory interface up to 64KB SRAM (против ATMEGA16-16AU)
- Trade-off: lower maximum clock speed (против ATMEGA162-16AU)
Заметки по проектированию
The L (low-voltage) grade of the ATMEGA162L-8AC must not be clocked beyond 8MHz; the frequency/voltage safe-operating relationship in AVR datasheets restricts maximum frequency at reduced VCC. If your board must run at 16MHz, populate the ATMEGA162-16AU/16AC grade instead (5V operation). Decouple VCC and AVCC separately with 100nF ceramics placed within a few millimeters of pins 10 and 30, and tie AREF to a clean reference through a 100nF capacitor when the ADC is used. Estimated: at 8MHz and 3.3V, active current is on the order of a few mA per AVR family figures - verify exact value in the manufacturer datasheet.
Keep the crystal (XTAL1/XTAL2, pins 13/12) as close to the device as possible with short traces and guard with a ground ring to minimize stray capacitance; external crystal load capacitors must match the crystal specification for accurate USART baud rates. Route the JTAG pins (PC0-PC3) to a 2x5 header if in-system debugging is planned, since retrofitting later requires bodge wires. If port C is fully used as I/O or external address lines, remember to disable JTAG via fuse, otherwise four pins are unavailable after reset.
Two frequent mistakes with this part: first, assuming ATMEGA16 code drops onto ATMEGA162 - the second USART and peripheral register maps differ, so firmware must be recompiled and retested. Second, leaving RESET (pin 9) undriven; use a 10k pull-up and consider external reset supervision for industrial environments. When using the external memory interface, ports A and C are consumed by the data/address bus, reducing general I/O significantly. Finally, verify the AC (commercial) temperature grade matches your operating environment; the AU suffix parts extend to -40C to +85C.
Информация о соответствии
Compliance status not stated in the retrieved web data. The AU-suffix ATmega162 variants are typically the RoHS/green package options; verify compliance on the official Microchip product page before procurement.