ATMEGA164P-A15AZ - 8-bit AVR MCU 16KB Flash, Automotive | Atmel
Référence : ATMEGA164P-A15AZ ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $4.12 | $4,12 |
| 10 | $3.71 | $37,10 |
| 100 | $3.3 | $330,00 |
| 500 | $2.97 | $1 485,00 |
| 1 000 | $2.68 | $2 680,00 |
ATMEGA164P-A15AZ Présentation
An 8-bit AVR microcontroller is a Harvard-architecture processor that executes most of its 133 powerful instructions in a single clock cycle. In the embedded-systems hierarchy, the MCU sits above discrete logic and below application processors, integrating CPU, program memory, data memory, timers, UART, SPI, TWI (I2C) and analog peripherals on a single die. The AVR family is widely used for cost-sensitive control tasks where a full ARM device would be over-specified.
Key features of this part include the picoPower AVR core for low active and sleep current, read-while-write Flash for self-programming and bootloaders, 32 general purpose I/O lines, 32 general purpose working registers, and an advanced RISC architecture with single-cycle execution. The -A15AZ suffix denotes the automotive temperature grade, making it suitable for harsh environments beyond commercial ratings.
Technically, the device pairs the enhanced AVR core with two 8-bit timers, one 16-bit timer, a 10-bit ADC, USART, SPI, and TWI interfaces. In-circuit debugging and In-Circuit Serial Programming (ICSP) are supported through the SPI pins using tools such as the MPLAB SNAP, per the Microchip product page, enabling field firmware updates without socketed parts.
Typical applications include automotive body modules and sensor nodes, industrial control panels, motor control auxiliary logic, and battery-powered instrumentation where the 2.7 V to 5.5 V rail tolerance simplifies power design across 3.3 V and 5 V systems.
When designing with the ATMEGA164P-A15AZ, decouple both VCC pin pairs and program fuse bits carefully - wrong fuse settings on an AVR can lock out ISP access. Verify the 8 MHz clock speed grade against your timing budget before pin-migrating from 16 MHz parts.
This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical AVR design notes not consolidated in the manufacturer datasheet.
Alternatives de remplacement direct pour ATMEGA164P-A15AZ — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ATMEGA164P-A15AZ (même facteur de forme et même empreinte) — différant par SRAM, Core Architecture, EEPROM, Instruction Set, Supply Voltage Range.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ATMEGA164P-15AT1
✅ Remplacement direct✓ En stock
$3.6 / unité
Voir la fiche technique →ATMEGA164P-15AT
✅ Remplacement direct✓ En stock
$2.35 / unité
Voir la fiche technique →ATMEGA164P-15AZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATMEGA16A-AU
✅ Remplacement direct✓ En stock
$2.05 / unité
Voir la fiche technique →ATMEGA8535L-8MI
✅ Remplacement direct✓ En stock
$2.75 / unité
Voir la fiche technique →ATMEGA164P-A15AZ Valeurs maximales et caractéristiques électriques
| Core Architecture | 8-bit AVR RISC |
| Largeur du bus de données | 8 bit |
| Flash Memory | 16 KB in-system programmable (read-while-write) |
| EEPROM | 512 B |
| SRAM | 1 KB |
| Maximum Clock Speed | 8 MHz |
| Supply Voltage Range | 2.7 V to 5.5 V |
| General Purpose I/O | 32 I/O lines (Microchip product page) |
| Working Registers | 32 general purpose registers |
| Instruction Set | 133 instructions, most single-cycle |
| Package Type | TQFP, 14 x 14 mm, 1 mm height, 44 terminals |
| Terminal Form | Gull wing |
| Temperature Grade | Automotive |
| Style de montage | Surface Mount |
| Life Cycle Stage | ACTIVE |
| Debug/Programming | ICSP and in-circuit debugging via SPI (e.g., MPLAB SNAP) |
Configuration des broches de ATMEGA164P-A15AZ
| Broche 1 | PB5 (SCK) — Port B bit 5 / SPI serial clock |
| Broche 2 | PB6 (MISO) — Port B bit 6 / SPI master-in slave-out |
| Broche 3 | PB7 (MOSI) — Port B bit 7 / SPI master-out slave-in |
| Broche 4 | RESET — Active-low reset input |
| Broche 5 | VCC — Digital supply voltage |
| Broche 6 | GND — Ground |
| Broche 7 | XTAL2 — Crystal oscillator output |
| Broche 8 | XTAL1 — Crystal oscillator input / external clock |
| Broche 9 | PD0 (RXD0) — Port D bit 0 / USART0 receive |
| Broche 10 | PD1 (TXD0) — Port D bit 1 / USART0 transmit |
| Broche 11 | PD2 (INT0) — Port D bit 2 / external interrupt 0 |
| Broche 12 | PD3 (INT1) — Port D bit 3 / external interrupt 1 |
| Broche 13 | PD4 (XCK/T0) — Port D bit 4 / USART clock or timer 0 input |
| Broche 14 | VCC — Digital supply voltage |
| Broche 15 | GND — Ground |
| Broche 16 | PD5 (T1/OC0B) — Port D bit 5 / timer 1 input or output compare |
| Broche 17 | PD6 (ICP1) — Port D bit 6 / timer 1 input capture |
| Broche 18 | PD7 (OC2A/OC0A) — Port D bit 7 / output compare PWM |
| Broche 19 | PA0 (ADC0) — Port A bit 0 / ADC channel 0 |
| Broche 20 | PA1 (ADC1) — Port A bit 1 / ADC channel 1 |
| Broche 21 | PA2 (ADC2) — Port A bit 2 / ADC channel 2 |
| Broche 22 | PA3 (ADC3) — Port A bit 3 / ADC channel 3 |
| Broche 23 | PA4 (ADC4) — Port A bit 4 / ADC channel 4 |
| Broche 24 | PA5 (ADC5) — Port A bit 5 / ADC channel 5 |
| Broche 25 | PA6 (ADC6) — Port A bit 6 / ADC channel 6 |
| Broche 26 | PA7 (ADC7) — Port A bit 7 / ADC channel 7 |
| Broche 27 | AVCC — Analog supply voltage for ADC |
| Broche 28 | AREF — Analog reference voltage |
| Broche 29 | GND — Ground |
| Broche 30 | PC0 (SCL/PCINT16) — Port C bit 0 / TWI clock |
| Broche 31 | PC1 (SDA/PCINT17) — Port C bit 1 / TWI data |
| Broche 32 | PC2 (TCK/PCINT18) — Port C bit 2 / JTAG test clock |
| Broche 33 | PC3 (TMS/PCINT19) — Port C bit 3 / JTAG test mode select |
| Broche 34 | PC4 (TDO/PCINT20) — Port C bit 4 / JTAG test data out |
| Broche 35 | PC5 (TDI/PCINT21) — Port C bit 5 / JTAG test data in |
| Broche 36 | PC6 (TOSC1/PCINT22) — Port C bit 6 / timer oscillator input |
| Broche 37 | PC7 (TOSC2/PCINT23) — Port C bit 7 / timer oscillator output |
| Broche 38 | VCC — Digital supply voltage |
| Broche 39 | GND — Ground |
| Broche 40 | PB0 (XCK0/T0/PCINT8) — Port B bit 0 / pin change interrupt |
| Broche 41 | PB1 (T1/OC1A/PCINT9) — Port B bit 1 / timer 1 or output compare |
| Broche 42 | PB2 (OC1B/PCINT10) — Port B bit 2 / output compare PWM |
| Broche 43 | PB3 (OC2A/MOSI/PCINT11) — Port B bit 3 / PWM or SPI MOSI |
| Broche 44 | PB4 (OC0A/MISO/PCINT12) — Port B bit 4 / PWM or SPI MISO |
Applications typiques
ATMEGA164P-A15AZ convient pour 6 applications: Automotive Body and Sensor Modules, Industrial Control Panels, Battery-Powered Instrumentation, Embedded Communication Nodes, Motor Control Auxiliary Logic, Security and IoT Sensor Devices.
Automotive Body and Sensor Modules
The ATMEGA164P-A15AZ targets automotive body electronics, sensor nodes, and actuator control, where the -AZ automotive temperature grade and 2.7 V to 5.5 V supply tolerance cover cold-crank and load-dump-adjacent rail conditions after upstream regulation. Its 16 KB ISP Flash with read-while-write supports field firmware updates over the vehicle's service interface, while 512 B EEPROM retains calibration data across power cycles. The 8-bit AVR core executing 133 mostly single-cycle instructions handles switch debouncing, LIN-style UART messaging, and PWM lamp or motor control with deterministic latency. Designers should verify the exact AEC-Q100 grade in the qualification report and derate clock frequency at low supply voltage per the datasheet's frequency-versus-voltage curve.
Recommandé
Industrial Control Panels
In industrial control panels, the ATMEGA164P-A15AZ provides 32 GPIO lines plus USART, SPI, and TWI interfaces for driving relays, reading discrete sensors, and communicating with HMIs. The 5 V-tolerant 2.7-5.5 V rail matches legacy 24 V-panel logic translated to 5 V, and the 10-bit ADC family peripherals digitize potentiometer and current-sense inputs. Read-while-write Flash enables on-panel bootloader updates without removing the TQFP from the board. Compared with a 3.3 V-only MCU, operating at 5 V improves noise margin in electrically noisy cabinet environments. Designers should add TVS protection on field-wired GPIO and validate the 8 MHz clock grade for deterministic scan times.
Recommandé
Battery-Powered Instrumentation
The picoPower technology in the ATMEGA164P-A15AZ makes it suitable for battery-powered meters, dataloggers, and handheld instruments. The AVR core supports multiple sleep modes that cut average current dramatically between measurements, while the wide 2.7 V to 5.5 V supply range allows direct operation from three alkaline cells or a single lithium cell via an LDO. The 512 B EEPROM stores calibration constants without external memory, and the ADC conditions sensor signals such as thermistors and strain gauges. A typical trade-off: the 1 KB SRAM limits complex signal processing, so keep buffering modest and stream data over USART or SPI rather than accumulating large arrays in RAM.
Recommandé
Embedded Communication Nodes
For RS-485/CAN-gateway auxiliary nodes and RF-module host controllers, the ATMEGA164P-A15AZ offers a hardware USART plus SPI and TWI, letting one MCU bridge a field bus to a radio module or display. The 8 MHz AVR core with single-cycle execution services UART framing at high baud rates with CPU headroom left for protocol logic. The 16 KB read-while-write Flash accommodates protocol stacks plus a bootloader, and 1 KB SRAM handles packet buffering for moderate message sizes. Surface-mount the 44-pin TQFP on a 4-layer board with solid ground plane for EMI performance, and route the crystal traces short and guarded to maintain clock stability in noisy RF environments.
Recommandé
Motor Control Auxiliary Logic
In motor-driven products such as fans, pumps, and small appliances, the ATMEGA164P-A15AZ supervises drive electronics: it generates PWM on timer outputs, reads back tachometer and current signals through the ADC, and implements fault shutdown in firmware. The 2.7-5.5 V range pairs with 5 V gate-driver or gate-pull-up circuits common in low-voltage BLDC and brushed-DC designs. The automotive grade extends reliability margins for products with harsh duty cycles. Keep PWM ISR execution short at the 8 MHz clock to preserve ADC sampling, and use the input-capture/pin-change interrupt features for precise tach edges. Validate thermal performance of the TQFP layout with generous copper pours on the power rails.
Recommandé
Security and IoT Sensor Devices
The ATMEGA164P-A15AZ fits security sensors, access-control readers, and IoT edge nodes that need 5 V I/O compatibility and modest compute. Thirty-two GPIO drive keypads, LEDs, and relays, while the TWI interface reads MEMS sensors or RTCs and the USART reports events upstream. Read-while-write Flash allows credential or configuration updates in the field, and EEPROM keeps keys and counters through power loss. The picoPower sleep modes support battery-backed or energy-harvesting installations. Note the 1 KB SRAM constraint: cryptographic buffering must stay lightweight, and designers requiring TLS-class security should treat this part as a front-end controller paired with a dedicated secure element.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATMEGA164P-A15AZ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATMEGA164P-15AT1 | ATMEGA164P-15AT | ATMEGA164P-15AZ | ATMEGA16A-AU | ATMEGA8535L-8MI |
|---|---|---|---|---|---|---|
| Brand | Atmel (Microchip Technology) | Atmel (Microchip Technology) | Atmel (Microchip Technology) | Atmel (Microchip Technology) | Atmel (Microchip Technology) | Atmel (Microchip Technology) |
| Package | TQFP-44 (14x14 mm) | TQFP-44 - same footprint | TQFP-44 - same footprint | TQFP-44 - same footprint | TQFP-44 - same footprint | TQFP-44 - same footprint |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 8 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 512 B |
| EEPROM | 512 B | 512 B | 512 B | 512 B | 512 B | 512 B |
| Core / Low-Power Technology | AVR picoPower | AVR picoPower | AVR picoPower | AVR picoPower | AVR (non-picoPower) | AVR (older generation) |
Principaux différenciateurs
- picoPower low-power core (vs ATMEGA16A-AU)
- Double the program memory of legacy generation (vs ATMEGA8535L-8MI)
- Automotive qualification suffix (vs ATMEGA16A-AU)
Notes de conception
The TQFP-44 provides two VCC pins (5, 14, 38) and three GND pins (6, 15, 29) plus a separate AVCC (pin 27). Decouple each VCC pin with a 100 nF ceramic capacitor placed within 2-3 mm of the pin, and add a 10 uF bulk capacitor per supply domain. Connect AVCC to VCC through an LC filter (ferrite bead plus 100 nF) when ADC accuracy matters, and keep the AREF trace short with its own 100 nF capacitor to ground. Route the crystal (XTAL1/XTAL2) traces as short as possible with a guard ground.
AVR fuse misconfiguration is the most common field failure. Never clear the SPIEN fuse or disable the RESET pin function unless a high-voltage parallel programmer is available - doing so locks out ICSP permanently on assembled boards. When migrating firmware from ATmega16A or ATmega8535 parts, re-verify fuse defaults, interrupt vector tables, and peripheral register names, since even same-footprint AVR dies differ. For bootloader designs, confirm the read-while-write Flash page size in the datasheet before writing the erase/program loop.
The 2.7 V to 5.5 V supply range allows both 3.3 V and 5 V operation, but clock frequency must be derated at low supply per the AVR frequency-versus-voltage safe operating curve in the datasheet. This automotive suffix carries an 8 MHz clock grade in the verified data - do not clock it at 16 MHz ratings used by standard-grade 164P variants. Estimated: at 5 V/8 MHz, active current per the ATmega164P family datasheet is in the low mA range; budget regulator headroom accordingly and use power-down sleep modes between tasks in battery designs.
In automotive and industrial environments, protect field-connected GPIO with series resistors (100-470 ohm) and TVS diodes, and use the internal pin-change interrupt features instead of polling to reduce EMI-sensitive bus activity. For SPI and TWI buses longer than 10 cm on the PCB, slow the edge rate via appropriate pull-up sizing on TWI (typically 4.7 kohm at 5 V) and keep SPI clock under 8 MHz with proper ground return paths beneath the traces.
Informations de conformité
FindIC's product overview labels the part 'Automotive, AEC-Q100, AVR ATmega'. Specific RoHS/REACH/lead-free status not stated in the verified web data - confirm on the Microchip product page.
