ATMEGA88PA-MNR - 8KB AVR MCU 20MHz VQFN-32 | Microchip
MPN: ATMEGA88PA-MNR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ATMEGA88PA-MNR Overview
An 8-bit microcontroller (MCU) is an integrated circuit that combines a processor core, memory, and peripherals such as timers, UART, SPI, and I2C on a single chip, forming the lowest tier of the embedded-processing hierarchy that ascends through 16-bit and 32-bit MCUs to microprocessors and systems-on-chip. The AVR architecture executes most instructions in a single clock cycle through its Harvard-architecture, single-cycle RISC core with 32 general-purpose working registers, delivering high code efficiency for embedded control tasks.
Key features of the ATMEGA88PA-MNR include two 8-bit timers and one 16-bit timer, a 10-bit ADC with 6 multiplexed external channels plus internal temperature sensor, a programmable serial USART, SPI and I2C (Two-Wire Interface) serial ports, an analog comparator, and in-system programmable (ISP) Flash with read-while-write capability. The picoPower technology family supports multiple sleep modes that reduce power consumption to sub-uA levels in standby, making the PA 'picoPower A' grade preferable to the older ATmega88 for battery designs.
The device operates from 2.5 V to 5.5 V (per the FindIC listing of 2.5V/3.3V/5V operation) and across a temperature range of -40C to +105C per the Mouser listing, suiting industrial environments above the standard 85C ceiling. The 131-instruction AVR RISC core achieves up to 20 MIPS throughput at 20 MHz.
Typical applications include industrial sensor nodes, battery-powered consumer products, motor and LED control, and communication interface bridges where a low-cost, low-power 8-bit controller is sufficient.
For design, exploit the picoPower sleep modes and disable unused clock domains to minimize average current; verify Flash size headroom (8 KB) before migrating code from ATmega48 (4 KB) variants.
This page synthesizes distributor pricing context, drop-in alternatives, pinout, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATMEGA88PA-MNR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ATMEGA88PA-MNR (same form factor and footprint) — differing in Package, Operating Temperature, Flash Memory, Packaging, Supply Voltage Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA88-20MU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
Contact for price
View Datasheet →ATMEGA88PB-MNR
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.29 / Unit
View Datasheet →ATMEGA168PA-MU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.72 / Unit
View Datasheet →ATMEGA48PA-MNR
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.86 / Unit
View Datasheet →ATMEGA88PA-MNR Maximum Ratings & Electrical Characteristics
| Core | AVR 8-bit RISC |
| Core Size | 8-bit |
| Program Memory Size | 8 KB (4K x 16) Flash |
| EEPROM Size | 512 B |
| RAM Size | 1 KB SRAM |
| Maximum Clock Frequency | 20 MHz |
| Number of I/O | 23 general purpose I/O lines |
| Supply Voltage Range | 2.5 V to 5.5 V (2.5V/3.3V/5V) |
| Operating Temperature | -40C to +105C |
| ADC Resolution | 10-bit |
| Package | 32-VQFN (5x5 mm), exposed pad |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (T/R) |
| Timers | Two 8-bit, one 16-bit |
| Serial Interfaces | USART, SPI, I2C (TWI) |
| Low Power Technology | picoPower |
ATMEGA88PA-MNR Pin Configuration
| Pin 1 | PD3 — Port D bit 3 / digital I/O |
| Pin 2 | PD4 — Port D bit 4 / digital I/O (XCK/T0) |
| Pin 3 | GND — Ground |
| Pin 4 | VCC — Digital supply voltage |
| Pin 5 | GND — Ground |
| Pin 6 | VCC — Digital supply voltage |
| Pin 7 | PB6 — Port B bit 6 / XTAL1 / TOSC1 (clock input) |
| Pin 8 | PB7 — Port B bit 7 / XTAL2 / TOSC2 (clock output) |
| Pin 9 | PD5 — Port D bit 5 / T1 (timer/counter1 external input) |
| Pin 10 | PD6 — Port D bit 6 / AIN0 (analog comparator positive input) |
| Pin 11 | PD7 — Port D bit 7 / AIN1 (analog comparator negative input) |
| Pin 12 | PB0 — Port B bit 0 / ICP1 / CLKO |
| Pin 13 | PB1 — Port B bit 1 / OC1A (PWM output) |
| Pin 14 | PB2 — Port B bit 2 / SS / OC1B |
| Pin 15 | PB3 — Port B bit 3 / MOSI / OC2A (SPI master-out) |
| Pin 16 | PB4 — Port B bit 4 / MISO (SPI master-in) |
| Pin 17 | PB5 — Port B bit 5 / SCK (SPI clock) |
| Pin 18 | AVCC — ADC supply voltage |
| Pin 19 | ADC6 — ADC input channel 6 |
| Pin 20 | AREF — ADC analog reference |
| Pin 21 | GND — Ground |
| Pin 22 | ADC7 — ADC input channel 7 |
| Pin 23 | PC0 — Port C bit 0 / ADC8 |
| Pin 24 | PC1 — Port C bit 1 / ADC9 |
| Pin 25 | PC2 — Port C bit 2 / ADC10 |
| Pin 26 | PC3 — Port C bit 3 / ADC11 |
| Pin 27 | PC4 — Port C bit 4 / ADC12 / SDA (I2C data) |
| Pin 28 | PC5 — Port C bit 5 / ADC13 / SCL (I2C clock) |
| Pin 29 | PC6 — Port C bit 6 / RESET (active low) |
| Pin 30 | PD0 — Port D bit 0 / RXD (USART receive) |
| Pin 31 | PD1 — Port D bit 1 / TXD (USART transmit) |
| Pin 32 | PD2 — Port D bit 2 / INT0 (external interrupt 0) |
Typical Applications
ATMEGA88PA-MNR is suitable for 6 applications: Industrial Sensor Nodes, Battery-Powered Consumer Products, Motor and LED Control, Communication Interface Bridges, Home Automation and IoT End Nodes, Test and Measurement Accessories.
Industrial Sensor Nodes
The ATMEGA88PA-MNR fits industrial sensor nodes because its -40C to +105C operating range exceeds the industrial 85C ceiling, and its 10-bit ADC with 6 external channels digitizes sensor outputs directly without an external converter. In a typical node, the MCU reads a sensor via the ADC or I2C/TWI interface, processes readings in the 1 KB SRAM, and transmits data over the USART or SPI bus to a wired or wireless link. The picoPower sleep modes cut average current dramatically in duty-cycled designs: the node can sleep in power-down mode and wake on external interrupt or watchdog timeout, sampling at intervals while consuming uA-level standby current. This combination of extended temperature rating, integrated analog, and low sleep current allows single-supply 3.3 V or 5 V designs with fewer components and longer battery or energy-harvesting lifetimes in factory-monitoring deployments.
Recommended
Battery-Powered Consumer Products
For battery-powered consumer products such as remote controls, toys, and portable meters, the ATMEGA88PA-MNR's picoPower technology is the decisive parameter: power-down sleep mode draws sub-uA current, extending coin-cell life to years in standby-dominated duty cycles. The internal calibrated RC oscillator allows the design to omit an external crystal, saving board space and BOM cost, while the 2.5 V supply floor supports direct operation from two alkaline cells or a single lithium coin cell through most of its discharge curve. The 23 GPIO lines drive LEDs, keys, and buzzers directly, and the USART/SPI/TWI peripherals connect to displays or RF modules when needed. With 8 KB Flash, application plus bootloader code fits comfortably. Tape-and-reel packaging (MNR suffix) supports high-volume automated assembly lines typical of consumer manufacturing.
Recommended
Motor and LED Control
The ATMEGA88PA-MNR suits small motor and LED control tasks through its timer/PWM subsystem: two 8-bit timers and one 16-bit timer provide multiple hardware PWM channels with adjustable frequency and resolution, driving MOSFET half-bridges or LED strings via simple gate-resistor or driver interfaces. The 105C temperature rating tolerates warm enclosures near power electronics, and the analog comparator enables cycle-by-cycle overcurrent protection when paired with a shunt resistor. The 10-bit ADC samples current and voltage feedback for closed-loop speed or brightness regulation executed in the single-cycle AVR core at up to 20 MIPS. In-system programmability lets firmware PWM profiles be updated on the production line via the SPI ISP header without desoldering the VQFN-32 device, simplifying variant management across fan, pump, and lighting SKUs.
Recommended
Communication Interface Bridges
As a protocol bridge, the ATMEGA88PA-MNR offers three independent serial engines - USART, SPI, and I2C/TWI - allowing translation between interfaces such as UART-to-SPI or I2C-to-UART within one chip. The read-while-write Flash supports bootloader-based field reconfiguration of bridge behavior, and the 8 KB program space accommodates buffering state machines plus two full protocol stacks at this complexity level. The 20 MHz maximum clock yields comfortable timing margins for baud rates up to 1 Mbps-class USART operation. Pin-interrupt capability on all PD/PC pins supports flow-control and handshaking signals without polling overhead. The exposed-pad VQFN-32 provides good thermal and ground integrity for signal-chain noise performance, and its 5x5 mm footprint keeps bridge dongles and adapter PCBs compact for embedded and desktop connectivity products.
Recommended
Home Automation and IoT End Nodes
In home-automation and IoT end nodes, the ATMEGA88PA-MNR balances cost, power, and connectivity: its I2C/TWI bus reads environmental sensors, the SPI port links to sub-GHz or 2.4 GHz radio transceiver modules, and the USART services legacy peripherals. PicoPower sleep modes with pin-change interrupts let the node wake on motion, button, or radio activity and return to sub-uA sleep, a pattern that multiplies battery life several-fold versus always-on operation. The 10-bit ADC with internal temperature sensor supports self-monitoring of enclosure conditions, while the 512 B EEPROM stores calibration data and device addresses across power cycles. The 2.5 V to 5.5 V supply range accepts regulation directly from mains adapters or primary cells, and the compact 32-VQFN 5x5 mm package fits wall-switch and sensor-puck form factors.
Recommended
Test and Measurement Accessories
The ATMEGA88PA-MNR serves in low-cost test and measurement accessories such as USB-serial adapters, calibration fixtures, and sensor front-ends, where its precise internal peripherals outperform bit-banged alternatives. The 16-bit timer with input-capture measures pulse widths and frequencies with clock-cycle resolution, and the 10-bit ADC with 2.56 V internal reference performs ratiometric measurements stable across supply variation. The analog comparator with bandgap reference provides simple threshold detection for continuity or limit testing. At 20 MHz, the single-cycle RISC core gives deterministic interrupt latency, important for timing-accurate instruments. The 105C rating permits use inside enclosures with power stages, and ISP programming supports firmware customization per test fixture. The exposed-pad VQFN-32 grounds well for low-noise analog front-end layouts on four-layer boards.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA88PA-MNR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA88-20MU | ATMEGA88PB-MNR | ATMEGA168PA-MU | ATMEGA48PA-MNR |
|---|---|---|---|---|---|
| Package | 32-VQFN (5x5 mm) | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 8 KB | 8 KB | 8 KB | 16 KB | 4 KB |
| EEPROM | 512 B | 512 B | 512 B | 512 B | 256 B |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 512 B |
| Max Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| picoPower / Low Sleep Current | Yes (PA die) | No (original die) | Yes | Yes (PA die) | Yes (PA die) |
Key Differentiators
- picoPower die with 105C rating (vs ATMEGA88-20MU)
- Cost-efficient 8 KB point in pin-compatible family ladder (vs ATMEGA168PA-MU)
- Full 1 KB SRAM for buffering (vs ATMEGA48PA-MNR)
Design Notes
Decouple both VCC pins (4 and 6) and AVCC (pin 18) with 100 nF ceramic capacitors placed within 2 mm of each pin, plus one bulk 4.7-10 uF capacitor per supply rail. AVCC must be connected to VCC even if the ADC is unused, per the datasheet, and should be filtered through an LC network (10 uH + 10 uF) in ADC-heavy designs to improve noise performance below 1 LSB of the 10-bit converter. Tie AREF (pin 20) to GND through 100 nF when using the internal 1.1 V or 2.56 V reference.
The 32-VQFN (5x5) exposed pad should be soldered to a grounded copper pour with an array of thermal vias; the pad is primarily a ground and thermal path. For reflow assembly, follow Microchip's VQFN land-pattern recommendation with ~0.55 mm pads; hand rework of VQFN-32 requires hot-air and stencil-prepared paste because the pads sit under the package body. Plan an ISP header (MOSI PB3, MISO PB4, SCK PB5, RESET PC6) on every PCB to allow field programming without desoldering.
The most common ATmega88 failures are fuse-bit related: enabling the wrong clock-source fuse (e.g., external clock selected with a crystal fitted) can brick the part, requiring high-voltage parallel programming for recovery. Also verify the brown-out detector fuse is enabled at 2.7 V for 5 V systems to prevent EEPROM corruption during slow power-down. When migrating code from ATMEGA88-20MU to the PA die, re-check sleep-mode current measurements, as register defaults differ slightly between silicon revisions.
Keep the crystal (if used on PB6/PB7) within 10 mm of the pins with guard ground traces, and route USART/SPI lines away from the ADC input traces (ADC6/ADC7 pins 19/22). Estimated: for radiated-emissions control on 20 MHz-digital edges, add 22-33 ohm series resistors on SCK and MOSI lines exceeding 10 cm of trace length to slow edge rates - a common practice in AVR reference designs.
Compliance Information
Compliance data not explicitly stated in the provided web data; verify on the Microchip product page (Microchip standard ATmega88PA parts are typically RoHS-compliant, but this must be confirmed against the official page).
