ATMEGA48PA-MMN - 4KB Flash 20MHz AVR MCU QFN-28 | Microchip
Артикул: ATMEGA48PA-MMN ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $1.18 | $1,18 |
| 10 | $1.06 | $10,60 |
| 100 | $0.92 | $92,00 |
| 500 | $0.83 | $415,00 |
| 1.000 | $0.74 | $740,00 |
ATMEGA48PA-MMN Обзор
An AVR 8-bit microcontroller is a Harvard-architecture RISC processor that executes most of its 131 instructions in a single clock cycle. Within the power-management hierarchy, an MCU of this class integrates CPU, program memory, data memory, timers, ADC, and communication peripherals on one die, replacing multi-chip logic designs in cost-sensitive embedded systems. The ATmega family spans 4KB to 32KB Flash devices sharing one core and one development toolchain.
Key features include the picoPower technology set (idle, power-down, power-save, and standby sleep modes) for ultra-low average consumption in battery products, three flexible timer/counters with compare modes, a 10-bit ADC, and the 32 general-purpose working registers that give AVR its high code density. The PA suffix denotes the low-power picoPower silicon revision of the ATmega48 generation.
Architecturally, the AVR core pairs the single-cycle ALU with on-chip in-system programmable (ISP) Flash, allowing firmware updates through the SPI-based ICSP interface using tools such as MPLAB SNAP or the Atmel-ICE debugger. The MMN VQFN-28 (4x4 mm) package suits dense two-layer PCBs and offers an exposed die-attach pad for improved grounding and thermal behavior.
Typical applications include battery-powered sensor nodes, small home-automation and IoT end nodes, industrial control subfunctions, and consumer appliance front-ends where 4KB of Flash and 512B of SRAM are sufficient.
Design consideration: at 5V and 20 MHz, confirm your supply falls within the high-voltage operating range listed by distributors, and respect the picoPower clock-configuration constraints when scaling frequency downward for low-power modes.
This page synthesizes distributor listings, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
Аналоги без доработки для ATMEGA48PA-MMN — 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 ATMEGA48PA-MMN (тот же форм-фактор и посадочное место) — отличается по Package, EEPROM, SRAM, ADC, Flash Memory.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
ATMEGA48PB-MMN
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
ATMEGA88PA-MMN
✅ Прямая замена ⚠️ Характеристики не проверены✓ В наличии
$2.05 / шт.
Открыть даташит →ATMEGA168PA-MMN
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
ATMEGA328P-MMH
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
ATMEGA48-20MMU
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
ATMEGA48PA-MMN Максимальные параметры и электрические характеристики
| Core Architecture | 8-bit AVR RISC |
| Flash Memory | 4 KB (2K x 16) ISP Flash |
| EEPROM | 256 B |
| SRAM | 512 B |
| Максимальная тактовая частота | 20 MHz |
| Instructions | 131 instructions, most single-cycle |
| General Purpose I/O | 23 I/O lines |
| Working Registers | 32 general purpose registers |
| Timers/Counters | 3 flexible timer/counters with compare modes |
| Supply Voltage (per distributor listing) | 4.5 V to 5.5 V (high-voltage range) |
| Operating Temperature (per Mouser) | up to 105 C |
| Корпус | 28-VQFN (4x4 mm), 0.45 mm pitch, 1 mm height, exposed pad |
| Тип монтажа | Surface Mount |
| Programming Interface | ICSP (SPI), In-Circuit Debug via 2 I/O pins + reset |
| Low Power Technology | picoPower sleep modes (idle, power-down, power-save, standby) |
| Статус жизненного цикла | ACTIVE (per DigChip) |
Конфигурация выводов ATMEGA48PA-MMN
| Контакт 1 | PD3 (PCINT19/OC2B/INT1) — Port D bit 3, pin-change interrupt 19, Timer2 output compare B, external interrupt 1 |
| Контакт 2 | PD4 (PCINT20/XCK/T0) — Port D bit 4, pin-change interrupt 20, USART external clock, Timer0 clock input |
| Контакт 3 | GND — Ground (per datasheet; see PB migration caution for pin 3) |
| Контакт 4 | PD5 (PCINT21/OC0B/T1) — Port D bit 5, pin-change interrupt 21, Timer0 output compare B, Timer1 clock input |
| Контакт 5 | PD6 (PCINT22/OC0A/AIN0) — Port D bit 6, pin-change interrupt 22, Timer0 output compare A, analog comparator positive input |
| Контакт 6 | VCC — Digital supply voltage (per datasheet; see PB migration caution for pin 6) |
| Контакт 7 | PD7 (PCINT23/AIN1) — Port D bit 7, pin-change interrupt 23, analog comparator negative input |
| Контакт 8 | PB0 (PCINT0/CLKO/ICP1) — Port B bit 0, pin-change interrupt 0, clock output, Timer1 input capture |
| Контакт 9 | PB1 (PCINT1/OC1A) — Port B bit 1, pin-change interrupt 1, Timer1 output compare A |
| Контакт 10 | PB2 (PCINT2/SS/OC1B) — Port B bit 2, pin-change interrupt 2, SPI slave select, Timer1 output compare B |
| Контакт 11 | PB3 (PCINT3/OC2A/MOSI) — Port B bit 3, pin-change interrupt 3, Timer2 output compare A, SPI master output |
| Контакт 12 | PB4 (PCINT4/MISO) — Port B bit 4, pin-change interrupt 4, SPI master input |
| Контакт 13 | PB5 (PCINT5/SCK) — Port B bit 5, pin-change interrupt 5, SPI serial clock |
| Контакт 14 | AVCC — ADC supply voltage |
| Контакт 15 | ADC6 — ADC input channel 6 (analog-only pin) |
| Контакт 16 | ADC7 — ADC input channel 7 (analog-only pin) |
| Контакт 17 | PB6 (PCINT6/XTAL1/TOSC1) — Port B bit 6, crystal oscillator input 1 / Timer oscillator input |
| Контакт 18 | PB7 (PCINT7/XTAL2/TOSC2) — Port B bit 7, crystal oscillator output 2 / Timer oscillator output |
| Контакт 19 | PC6 (RESET/PCINT14) — Reset input (active low) / pin-change interrupt 14 |
| Контакт 20 | PD0 (PCINT16/RXD) — Port D bit 0, pin-change interrupt 16, USART receive |
| Контакт 21 | PD1 (PCINT17/TXD) — Port D bit 1, pin-change interrupt 17, USART transmit |
| Контакт 22 | PD2 (PCINT18/INT0) — Port D bit 2, pin-change interrupt 18, external interrupt 0 |
| Контакт 23 | PC0 (PCINT8/ADC0) — Port C bit 0, pin-change interrupt 8, ADC channel 0 |
| Контакт 24 | PC1 (PCINT9/ADC1) — Port C bit 1, pin-change interrupt 9, ADC channel 1 |
| Контакт 25 | PC2 (PCINT10/ADC2) — Port C bit 2, pin-change interrupt 10, ADC channel 2 |
| Контакт 26 | PC3 (PCINT11/ADC3) — Port C bit 3, pin-change interrupt 11, ADC channel 3 |
| Контакт 27 | PC4 (PCINT12/SDA/ADC4) — Port C bit 4, pin-change interrupt 12, TWI data, ADC channel 4 |
| Контакт 28 | PC5 (PCINT13/SCL/ADC5) — Port C bit 5, pin-change interrupt 13, TWI clock, ADC channel 5 |
Типичное применение
ATMEGA48PA-MMN подходит для 6 применениеs: Battery-Powered Sensor Nodes, Industrial Control Subfunctions, Home Automation and IoT End Nodes, Consumer Appliance Front-Ends, Analog Measurement Front-Ends, Prototype and Education Platforms.
Battery-Powered Sensor Nodes
The ATMEGA48PA-MMN's picoPower technology is the primary reason it fits battery-powered sensor nodes: idle, power-down, power-save, and standby sleep modes let the MCU sleep between wake events so average current drops to microamp levels, directly extending battery life. With 4KB Flash and 512B SRAM, the device comfortably hosts sensor polling loops, simple protocol stacks, and calibration routines. A typical topology wakes the MCU on a timer or pin-change interrupt, reads a sensor through the ADC or SPI/I2C, transmits a short packet, and returns to power-save. Quantified benefit: duty-cycling at 1% active time reduces average consumption roughly 100x versus always-on operation, enabling multi-year coin-cell life.
Рекомендуется
Industrial Control Subfunctions
In industrial automation, the ATMEGA48PA-MMN handles localized control tasks such as relay sequencing, PWM-driven actuator control, and limit-switch monitoring, offloading the main PLC or gateway. Its three flexible timer/counters with compare modes generate precise PWM without CPU overhead, and the 10-bit ADC digitizes potentiometer, thermistor, or current-shunt feedback. Distributor listings rate the device to 105 C, covering control-cabinet ambient conditions. The 23 I/O lines interface optocouplers, drivers, and indicators directly. Placed as a 5V, 20 MHz controller, the single-cycle RISC core executes interrupt-latency-critical loops deterministically. Trade-off: at 4KB Flash, communication-heavy Modbus implementations are tight, so use the pin-compatible ATMEGA88PA-MMN when protocol stacks grow.
Рекомендуется
Home Automation and IoT End Nodes
Smart-home end nodes such as wall switches, dimmers, and sensor pucks use the ATMEGA48PA-MMN where cost per unit dominates the BOM. The 4KB ISP Flash accommodates RF-module-at-driver logic while the 23 I/O lines handle buttons, triacs, and status LEDs. The exposed-pad 28-VQFN (4x4 mm, 0.45 mm pitch) keeps the controller footprint under 25 mm squared, enabling compact mains-safe enclosures. ICSP programming through two I/O pins plus reset allows firmware updates during manufacturing via an MPLAB SNAP. Performance consideration: run at reduced clock (for example 8 MHz) in always-listening nodes to cut dynamic current; at 5V high-voltage range the device tolerates noisy mains-derived supplies better than 3V-only MCUs.
Рекомендуется
Consumer Appliance Front-Ends
Small appliance and consumer-product front panels - coffee makers, fans, chargers, toys - use the ATMEGA48PA-MMN to scan keypads, drive segment or matrix LED displays, and manage simple state machines. The 32 general-purpose working registers and single-cycle instruction execution keep debouncing and display-refresh routines responsive at modest clock rates, and picoPower sleep modes meet standby-power expectations in off-state. The green plastic 4x4 mm VQFN package satisfies halogen-restricted consumer material requirements per distributor packaging descriptions. Design consideration: the 105 C rating (per Mouser) accommodates enclosure heat soak, but verify the frequency-versus-voltage speed grade when operating at reduced supply in battery products.
Рекомендуется
Analog Measurement Front-Ends
The ATMEGA48PA-MMN's 10-bit ADC, internal bandgap reference options, and differential-input capability make it a compact analog measurement controller for thermistor bridges, potentiometer sensing, and battery-voltage monitors. Running the ADC from a reduced system clock lowers ADC noise for small-signal channels, while the 512B SRAM buffers sample windows for simple averaging or RMS estimation. The VQFN exposed pad grounds the analog die region, reducing ground bounce when ADC and digital I/O share the same die. Quantified workflow: sample at modest rates, oversample 4x-16x for extra effective bits, and use power-down between conversions to preserve battery. For precision beyond 10-bit resolution, add an external ADC and keep the mega48 as the host.
Рекомендуется
Prototype and Education Platforms
Because the ATmega48/88/168/328 family shares one core, one instruction set, and one toolchain (MPLAB X with SNAP or Atmel-ICE), the ATMEGA48PA-MMN is a natural low-cost teaching and prototyping device. Students can develop on the 4KB part and migrate identical code to ATMEGA328P-based boards without relearning architecture. The ICSP header uses only two I/O pins plus reset, teaching minimal in-circuit debugging methodology. On 28-VQFN adapters or the ATMEGA48PA-AU TQFP variant for breadboards, peripheral exercises covering timers, ADC, sleep modes, and interrupts map one-to-one to industrial practice. Benefit: 4KB Flash enforces lean, register-level C or assembly habits early, while the upgrade path removes ceiling pressure later.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для ATMEGA48PA-MMN — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | ATMEGA48PB-MMN | ATMEGA88PA-MMN | ATMEGA168PA-MMN | ATMEGA328P-MMH | ATMEGA48-20MMU |
|---|---|---|---|---|---|---|
| Package | 28-VQFN (4x4 mm) | 28-VQFN (4x4 mm) - same | 28-VQFN (4x4 mm) - same | 28-VQFN (4x4 mm) - same | 28-VQFN (4x4 mm) - same | 28-VQFN (4x4 mm) - same |
| Brand | Microchip Technology (Atmel) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology (Atmel) |
| Flash Memory | 4 KB | 4 KB | 8 KB | 16 KB | 32 KB | 4 KB |
| SRAM | 512 B | 512 B | 1 KB | 1 KB | 2 KB | 512 B |
| EEPROM | 256 B | 256 B | 512 B | 512 B | 1 KB | 256 B |
| Max Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Low-Power Technology | picoPower (PA revision) | picoPower (PB revision) | picoPower (PA revision) | picoPower (PA revision) | picoPower-class (P revision) | Standard (non-picoPower) |
| Drop-In Status | Reference device | Drop-in with pin 3/pin 6 cautions (Microchip migration note) | Pin-to-pin, more flash | Pin-to-pin, more flash | Pin-to-pin, highest flash | Pin-to-pin, non-picoPower silicon |
Ключевые отличия
- Lowest-cost point of the pin-compatible ATmega QFN-28 family (против ATMEGA328P-MMH)
- picoPower silicon revision (против ATMEGA48-20MMU)
- Clear forward-migration path (против ATMEGA48PB-MMN)
- Same-footprint memory scaling without PCB change (против ATMEGA88PA-MMN)
Заметки по проектированию
The 28-VQFN (4x4 mm, 0.45 mm pitch) MMN package requires an exposed-pad land pattern. Solder the center pad to a grounded copper area with a 3x3 via array stitching to the ground plane; this provides both the primary GND connection and heat spreading for the die. Use 0.2 mm solder-mask-defined apertures on the 0.45 mm pitch perimeter lands and inspect with X-ray or AOI since QFN joints are hidden. If your assembler cannot rework QFN reliably, prototype with the TQFP-32 ATMEGA48PA-AU instead - the code is identical.
Distributor listings place the 20 MHz high-speed operating point in the 4.5 V to 5.5 V supply range. Decouple VCC and AVCC separately with 100 nF ceramic capacitors placed within 2 mm of each pin, plus a 4.7-10 uF bulk capacitor per rail, and connect AVCC to VCC through an LC filter (ferrite bead plus capacitor) when ADC accuracy matters. Estimated: at 5 V and 20 MHz, active current is on the order of 10 mA class per AVR family behavior, so a 100 mA-class 5 V regulator is adequate for MCU-only designs - verify against the datasheet current table for your exact conditions.
When migrating designs from ATMEGA48PA to the newer ATMEGA48PB, Microchip's online documentation specifies two mandatory checks: pin 3 - if connected to GND, the pin must not be actively driven or ACO must not be enabled; pin 6 - if connected to VCC, the pin must not be actively driven. Also remember PB5-PB7 double as the ISP/SPI and crystal pins: if you use PB6/PB7 for an external crystal, they are unavailable for ICSP clock/data routing on other pins, so place the ICSP header on MOSI/MISO/SCK/RESET and keep RESET pulled up through a 10k resistor with a programming header pin.
To exploit picoPower sleep modes, configure all unused I/O as inputs with internal pull-ups enabled or drive them to defined levels - floating pins in power-down mode cause shoot-through current that can dominate the sleep budget. Estimated: in a duty-cycled sensor node sleeping 99% of the time, average current is approximately I_active x 0.01 + I_sleep x 0.99, so even tens of microamps of leakage on floating pins can double battery consumption. Disable the digital input buffer on ADC-only pins (ADC6/ADC7) and use the watchdog or Timer2 asynchronous tick for wake-up.
Информация о соответствии
Distributor packaging description mentions GREEN plastic package material, which generally indicates RoHS-oriented material selection, but explicit RoHS/REACH/lead-free declarations were not present in the provided data - verify on the Microchip product page. AEC-Q100 status not stated in provided data.
