ATMEGA88PB-ANR - 8-Bit AVR MCU 8KB Flash 20MHz | Microchip
MPN: ATMEGA88PB-ANR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.15 | $2.15 |
| 10 | $1.94 | $19.40 |
| 100 | $1.72 | $172.00 |
| 500 | $1.55 | $775.00 |
| 1,000 | $1.38 | $1,380.00 |
ATMEGA88PB-ANR Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (Flash), data memory (SRAM), non-volatile storage (EEPROM), and peripherals such as timers, serial interfaces, and analog-to-digital converters on one die. Within the product hierarchy, the ATmega88PB sits under AVR 8-bit MCUs, which belong to the broader microcontroller category, itself a subset of embedded processors and semiconductor integrated circuits. The AVR core uses a RISC architecture with 32 general-purpose working registers and single-cycle execution for most instructions, delivering near 1 MIPS per MHz throughput.
Key features include 8 KB ISP Flash with read-while-write capability, 512 B EEPROM for parameter storage, 1 KB SRAM, three flexible timer/counters with compare modes, a USART with wake-up on start of transmission, an SPI interface, a byte-oriented two-wire serial interface (I2C), and a 10-bit ADC. The device supports internal and external interrupts and offers 27 programmable I/O lines for flexible peripheral expansion.
The ATmega88PB uses Microchip's picoPower technology, which reduces active and standby current consumption for battery-powered and energy-harvesting applications. The 20 MHz maximum clock supports real-time control loops, while the 32-TQFP (7x7 mm) package balances pin count and board area for space-constrained designs. The -ANR suffix denotes a tape-and-reel, 105 C industrial temperature grade, green/RoHS-compliant variant.
Typical applications include industrial control and automation, consumer electronics, battery-powered portable devices, sensor nodes, motor control, and human-machine interface panels. The integrated ADC and multiple serial interfaces make it suitable for data acquisition and communication gateways.
When designing with the ATMEGA88PB-ANR, decouple VCC and AVCC with 100 nF ceramic capacitors placed close to the pins, and use a stable clock source for timing-critical applications. The device is supported by Microchip Studio and the AVR GCC toolchain.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single reference for selection, replacement, and layout decisions.
Drop-in alternatives for ATMEGA88PB-ANR — 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 ATMEGA88PB-ANR (same form factor and footprint) — differing in Maximum Clock Frequency, Package, Operating Temperature, Communication Interfaces, Packaging.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA88PA-ANR
✅ Drop-In✓ In Stock
$0.92 / Unit
View Datasheet →ATMEGA88PA-AUR
✅ Drop-In✓ In Stock
$0.82 / Unit
View Datasheet →ATMEGA168PB-ANR
✅ Drop-In✓ In Stock
$0.72 / Unit
View Datasheet →ATMEGA48PB-ANR
✅ Drop-In📋 Reference alternative (not in catalog)
ATMEGA88PB-AU
✅ Drop-In✓ In Stock
$0.86 / Unit
View Datasheet →ATMEGA88PB-ANR Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit AVR RISC |
| Program Memory | 8 KB ISP Flash (4K x 16) |
| EEPROM | 512 B |
| SRAM | 1 KB |
| Maximum Clock Frequency | 20 MHz |
| General Purpose I/O Lines | 27 |
| Working Registers | 32 general purpose |
| Timer/Counters | 3 flexible with compare modes |
| Serial Interfaces | USART, SPI, byte-oriented two-wire (I2C) |
| ADC | 10-bit |
| Interrupts | Internal and external |
| Package | 32-TQFP (7x7 mm) |
| Operating Temperature | -40 C to +105 C |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel |
| Low Power Technology | picoPower |
| RoHS Status | Compliant (green) |
| Functional Safety | Functional Safety (FuSa) capable |
ATMEGA88PB-ANR Pin Configuration
| Pin 1 | PD3 — Port D bit 3 / USART TXD |
| Pin 2 | PD4 — Port D bit 4 / Timer0 external clock |
| 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 / crystal oscillator |
| Pin 8 | PB7 — Port B bit 7 / crystal oscillator |
| Pin 9 | PD5 — Port D bit 5 / USART TXD |
| Pin 10 | PD6 — Port D bit 6 / USART RXD |
| Pin 11 | PD7 — Port D bit 7 |
| Pin 12 | PB0 — Port B bit 0 / Timer1 capture |
| Pin 13 | PB1 — Port B bit 1 / Timer1 PWM |
| Pin 14 | PB2 — Port B bit 2 / Timer1 PWM |
| Pin 15 | PB3 — Port B bit 3 / SPI MOSI |
| Pin 16 | PB4 — Port B bit 4 / SPI MISO |
| Pin 17 | PB5 — Port B bit 5 / SPI SCK |
| Pin 18 | AVCC — Analog supply voltage |
| Pin 19 | ADC6 — Analog-to-digital converter input 6 |
| Pin 20 | AREF — Analog reference voltage |
| Pin 21 | GND — Ground |
| Pin 22 | ADC7 — Analog-to-digital converter input 7 |
| Pin 23 | PC0 — Port C bit 0 / ADC0 |
| Pin 24 | PC1 — Port C bit 1 / ADC1 |
| Pin 25 | PC2 — Port C bit 2 / ADC2 |
| Pin 26 | PC3 — Port C bit 3 / ADC3 |
| Pin 27 | PC4 — Port C bit 4 / ADC4 / I2C SDA |
| Pin 28 | PC5 — Port C bit 5 / ADC5 / I2C SCL |
| Pin 29 | PC6 — Port C bit 6 / RESET |
| Pin 30 | PD0 — Port D bit 0 / USART RXD |
| Pin 31 | PD1 — Port D bit 1 / USART TXD |
| Pin 32 | PD2 — Port D bit 2 / INT0 |
Typical Applications
ATMEGA88PB-ANR is suitable for 6 applications: Industrial Control and Automation, Battery-Powered Portable Devices, Sensor Nodes and Data Acquisition, Consumer Electronics and Appliances, Motor Control and Actuator Drivers, Human-Machine Interface Panels.
Industrial Control and Automation
The ATMEGA88PB-ANR fits industrial control nodes because its 27 I/O lines, three timer/counters, and 10-bit ADC can directly interface with sensors, relays, and motor drivers without external glue logic. Running at 20 MHz, it executes most AVR instructions in a single cycle, giving deterministic response for control loops. The 105 C temperature rating of the -ANR variant supports operation in factory-floor environments where ambient temperatures exceed consumer limits. A typical implementation uses the USART for Modbus or serial fieldbus communication and the SPI bus for external memory or display controllers. The 8 KB Flash is adequate for state-machine firmware, while the 512 B EEPROM stores calibration constants across power cycles. Designers should add 100 nF decoupling on VCC and AVCC and use a watchdog timer for fault recovery in unattended installations.
Recommended
Battery-Powered Portable Devices
The ATMEGA88PB-ANR uses Microchip picoPower technology to minimize active and standby current, making it suitable for battery-powered handheld instruments and portable data loggers. Its 1.8 V to 5.5 V supply range allows direct operation from single-cell lithium or dual-cell alkaline packs without a boost converter, reducing bill-of-materials cost and board area. Multiple sleep modes let firmware trade wake-up latency for current draw, extending runtime in duty-cycled sensor applications. The integrated 10-bit ADC samples battery voltage and analog sensors without an external converter, while the byte-oriented two-wire interface connects to low-power EEPROM or sensor ICs. The 32-TQFP (7x7 mm) package is compact enough for space-constrained enclosures. Designers should disable unused peripherals before sleep and use the internal oscillator for non-timing-critical tasks to save power.
Recommended
Sensor Nodes and Data Acquisition
The ATMEGA88PB-ANR is well suited to sensor nodes because it integrates a 10-bit ADC, multiple serial interfaces, and 27 I/O lines in a single 32-TQFP package. Analog sensor outputs connect directly to the ADC channels, while digital sensors use the I2C or SPI bus, eliminating external multiplexing in many designs. The 1 KB SRAM buffers sample bursts before transmission, and the 512 B EEPROM stores node addresses and calibration coefficients. The USART supports wired telemetry, and the SPI interface can drive low-power RF transceiver modules for wireless sensor networks. At 20 MHz the device handles oversampling and simple digital filtering in firmware. For noise-sensitive measurements, designers should separate the AVCC supply with an LC filter and keep analog traces away from the digital switching nodes to preserve ADC accuracy.
Recommended
Consumer Electronics and Appliances
The ATMEGA88PB-ANR serves consumer appliance control panels where cost, reliability, and low power matter. Its 27 I/O lines drive buttons, LEDs, and seven-segment displays directly, while the three timer/counters generate PWM for backlight dimming and buzzer tones. The 8 KB Flash holds user-interface state machines and menu logic, and the 512 B EEPROM retains user settings through power loss. The 20 MHz clock supports responsive key scanning and display refresh without flicker. Because the device operates from 1.8 V to 5.5 V, it interfaces with both 3.3 V and 5 V peripheral ICs, simplifying mixed-voltage designs. The 32-TQFP package is compatible with automated assembly lines. Designers should add series resistors on I/O lines that connect to external connectors to protect against ESD during handling and field use.
Recommended
Motor Control and Actuator Drivers
The ATMEGA88PB-ANR can implement open-loop and simple closed-loop motor control using its three timer/counters to generate PWM waveforms and its 10-bit ADC to read current-sense or position feedback signals. The 20 MHz core provides enough computational headroom for PID loops on brushed DC motors and stepper sequencing. 27 I/O lines drive gate drivers, H-bridge enable pins, and limit switches without external logic. The USART allows parameter tuning or command input from a host controller, and the SPI interface can connect to external gate-driver ICs with diagnostic registers. The 105 C rating supports operation near motor windings where ambient temperature rises. Designers should keep PWM traces short, add gate resistors to limit switching noise, and use a separate ground return for the power stage to avoid corrupting ADC readings.
Recommended
Human-Machine Interface Panels
The ATMEGA88PB-ANR is used in HMI panels that combine keypads, rotary encoders, LEDs, and small character displays. Its 27 I/O lines scan matrix keypads and multiplex display segments, while timer/counter PWM controls brightness. The 8 KB Flash stores menu structures and display fonts, and the 1 KB SRAM buffers the active screen. The USART or I2C interface links the panel to a main controller, and the 10-bit ADC can read analog potentiometers or touch-sense electrodes. The 32-TQFP package fits behind standard panel cutouts. Because the device supports in-system programming, firmware updates can be applied through the panel connector during production or field service. Designers should debounce mechanical inputs in firmware and add ESD protection on exposed front-panel connections to meet consumer reliability expectations.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA88PB-ANR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA88PA-ANR | ATMEGA88PA-AUR | ATMEGA168PB-ANR | ATMEGA48PB-ANR |
|---|---|---|---|---|---|
| Package | 32-TQFP (7x7) | 32-TQFP (7x7) - same | 32-TQFP (7x7) - same | 32-TQFP (7x7) - same | 32-TQFP (7x7) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 8 KB (4K x 16) | 8 KB | 8 KB | 16 KB | 4 KB |
| EEPROM | 512 B | 512 B | 512 B | 1 KB | 256 B |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 512 B |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| I/O Lines | 27 | 27 | 27 | 27 | 27 |
| Low Power Technology | picoPower | picoPower | picoPower | picoPower | picoPower |
| Operating Temperature | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C |
| Packaging | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel |
Key Differentiators
- Newer PB-series core with picoPower and FuSa support (vs ATMEGA88PA-ANR)
- Higher Flash density than ATMEGA48PB-ANR (vs ATMEGA48PB-ANR)
- Lower cost per KB than ATMEGA168PB-ANR for moderate firmware (vs ATMEGA168PB-ANR)
Design Notes
Decouple VCC and AVCC with 100 nF ceramic capacitors placed as close as possible to the respective pins, and add a 10 uF bulk capacitor on the board supply rail. For ADC accuracy, insert an LC filter between VCC and AVCC to isolate digital switching noise from the analog supply. Keep the AREF pin decoupled with a 100 nF capacitor when using the internal reference.
Route the crystal or resonator traces as short as possible and keep them away from high-speed digital signals and switching regulators. Place the load capacitors symmetrically on both crystal pins and connect them to a clean ground return. For the 32-TQFP package, use a ground plane under the device and connect all GND pins with short vias to minimize inductance.
Do not leave the RESET pin floating; add an external pull-up resistor and a 100 nF capacitor to ground for reliable power-on reset. Ensure the brown-out detector threshold is set appropriately for the supply ramp rate, and avoid driving I/O pins above VCC during partial power-down, which can cause latch-up. Verify fuse settings for the clock source before production programming.
Compliance Information
Distributor listings describe the ATMEGA88PB-ANR as green and RoHS compliant. AEC-Q100 is not applicable; this is an industrial-grade part rated to 105 C. REACH, halogen-free, and conflict-minerals status were not stated in the provided data.
