ATMEGA32-16PJ - 8-Bit AVR MCU, 16MHz, 32KB Flash DIP-40 | Microchip
Référence : ATMEGA32-16PJ ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $5.2 | $5,20 |
| 10 | $4.75 | $47,50 |
| 100 | $4.3 | $430,00 |
| 500 | $3.95 | $1 975,00 |
| 1 000 | $3.6 | $3 600,00 |
ATMEGA32-16PJ Présentation
A microcontroller (MCU) is a single integrated circuit that combines a processor core, program memory, data memory, and configurable peripherals into one chip, forming the lowest layer of the embedded-system hierarchy: microcontroller unit -> embedded processor -> computing system. The AVR ATmega family uses an advanced RISC architecture in which 131 powerful instructions, most executed in a single clock cycle, work together with 32 general-purpose 8-bit registers to deliver deterministic, single-cycle execution that simplifies real-time firmware design.
Key features of the ATMEGA32-16PJ include the 32KB (16K x 16) in-system programmable Flash with self-programming capability for bootloader updates, an 8-channel 10-bit ADC for analog sensing, I2C (TWI), SPI, and UART/USART serial interfaces for connectivity, and a JTAG interface for on-chip debugging and boundary-scan testing. Four flexible PWM/timer channels (two 8-bit and one 16-bit timers with output compare) support motor control and LED dimming tasks.
Architecturally, the AVR core pairs the RISC instruction set with a Harvard memory structure that separates Flash program memory from SRAM data paths, allowing instruction fetch and data access to overlap in a pipelined two-stage scheme. The self-programming Flash enables field firmware upgrades, while the 1KB EEPROM retains calibration data through power cycles; in-system programming via SPI removes the need for a dedicated programmer socket.
Typical applications include university and maker prototyping on solderless breadboards (the DIP-40 footprint is the primary reason this package remains popular for education), industrial control panels and sensor nodes that need 5V noise immunity, and legacy equipment maintenance where an easily socketed, hand-solderable MCU simplifies board-level replacement.
Design consideration: the ATMEGA32-16PJ is rated for a 4.5V to 5.5V supply at the 16 MHz speed grade; running the same silicon from 3.3V requires dropping to the slower ATmega32L speed class or reducing the clock below the f_MAX curve for the applied voltage.
This page synthesizes verified distributor stock and pricing data, same-package drop-in alternatives, a complete DIP-40 pinout, and practical design notes not found together on the manufacturer datasheet, giving engineers a single citable reference for the ATMEGA32-16PJ.
Alternatives de remplacement direct pour ATMEGA32-16PJ — 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 ATMEGA32-16PJ (même facteur de forme et même empreinte) — différant par Package, Debug Interface, Communication Interfaces, Instructions, Operating Temperature.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ATMEGA32-16PI
✅ Remplacement direct✓ En stock
$2.75 / unité
Voir la fiche technique →ATMEGA32A-PU
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$3.85 / unité
Voir la fiche technique →ATMEGA32L-8PU
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$9.75 / unité
Voir la fiche technique →ATMEGA16A-PU
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
Contactez-nous pour le prix
Voir la fiche technique →ATMEGA8535-16PU
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$2.05 / unité
Voir la fiche technique →ATMEGA32-16PJ Valeurs maximales et caractéristiques électriques
| Core Architecture | 8-bit AVR RISC |
| Max Clock Frequency | 16 MHz |
| Throughput | Up to 16 MIPS at 16 MHz |
| Flash Program Memory | 32 KB (16K x 16) self-programming |
| SRAM | 2 KB |
| EEPROM | 1 KB (1K x 8) |
| Instructions | 131 powerful instructions, most single-cycle |
| General Purpose Registers | 32 x 8-bit |
| ADC | 8-channel 10-bit |
| Communication Interfaces | I2C (TWI), SPI, UART/USART |
| Debug Interface | JTAG for on-chip debug |
| Timers | Two 8-bit and one 16-bit timer with PWM |
| Supply Voltage (16 MHz grade) | 4.5 V to 5.5 V |
| Boîtier | 40-PDIP (0.600 in, 15.24 mm) |
| Type de montage | Through-Hole |
| In-System Programming | Yes, via SPI |
Configuration des broches de ATMEGA32-16PJ
| Broche 1 | PB0 (XCK/T0) — Port B bit 0 / USART external clock / Timer0 clock input |
| Broche 2 | PB1 (T1) — Port B bit 1 / Timer1 clock input |
| Broche 3 | PB2 (AIN0/INT2) — Port B bit 2 / analog comparator positive input / external interrupt 2 |
| Broche 4 | PB3 (AIN1/OC0) — Port B bit 3 / analog comparator negative input / Timer0 PWM output |
| Broche 5 | PB4 (SS) — Port B bit 4 / SPI slave select |
| Broche 6 | PB5 (MOSI) — Port B bit 5 / SPI master output, slave input |
| Broche 7 | PB6 (MISO) — Port B bit 6 / SPI master input, slave output |
| Broche 8 | PB7 (UCSK/SCK) — Port B bit 7 / SPI serial clock |
| Broche 9 | RESET — Active-low reset input; also used as debugWIRE-less programming reset |
| Broche 10 | VCC — Digital supply voltage (4.5 V to 5.5 V at 16 MHz) |
| Broche 11 | GND — Ground |
| Broche 12 | XTAL2 — Inverting oscillator amplifier output |
| Broche 13 | XTAL1 — Inverting oscillator amplifier input / external clock input |
| Broche 14 | PD0 (RXD) — Port D bit 0 / USART receive data input |
| Broche 15 | PD1 (TXD) — Port D bit 1 / USART transmit data output |
| Broche 16 | PD2 (INT0) — Port D bit 2 / external interrupt 0 |
| Broche 17 | PD3 (INT1) — Port D bit 3 / external interrupt 1 |
| Broche 18 | PD4 (OC1B) — Port D bit 4 / Timer1 output compare B (PWM) |
| Broche 19 | PD5 (OC1A) — Port D bit 5 / Timer1 output compare A (PWM) |
| Broche 20 | PD6 (ICP1) — Port D bit 6 / Timer1 input capture |
| Broche 21 | PD7 (OC2) — Port D bit 7 / Timer2 output compare (PWM) |
| Broche 22 | PC0 (SCL) — Port C bit 0 / TWI (I2C) serial clock |
| Broche 23 | PC1 (SDA) — Port C bit 1 / TWI (I2C) serial data |
| Broche 24 | PC2 (TCK) — Port C bit 2 / JTAG test clock |
| Broche 25 | PC3 (TMS) — Port C bit 3 / JTAG test mode select |
| Broche 26 | PC4 (TDO) — Port C bit 4 / JTAG test data output |
| Broche 27 | PC5 (TDI) — Port C bit 5 / JTAG test data input |
| Broche 28 | PC6 (TOSC1) — Port C bit 6 / Timer2 oscillator input (32.768 kHz RTC crystal) |
| Broche 29 | PC7 (TOSC2) — Port C bit 7 / Timer2 oscillator output |
| Broche 30 | AVCC — ADC supply voltage; must be connected to VCC via low-pass filter |
| Broche 31 | GND (ADC) — ADC ground reference |
| Broche 32 | AREF — ADC analog reference voltage |
| Broche 33 | PA7 (AD7) — Port A bit 7 / ADC channel 7 |
| Broche 34 | PA6 (AD6) — Port A bit 6 / ADC channel 6 |
| Broche 35 | PA5 (AD5) — Port A bit 5 / ADC channel 5 |
| Broche 36 | PA4 (AD4) — Port A bit 4 / ADC channel 4 |
| Broche 37 | PA3 (AD3) — Port A bit 3 / ADC channel 3 |
| Broche 38 | PA2 (AD2) — Port A bit 2 / ADC channel 2 |
| Broche 39 | PA1 (AD1) — Port A bit 1 / ADC channel 1 |
| Broche 40 | PA0 (AD0) — Port A bit 0 / ADC channel 0 |
Applications typiques
ATMEGA32-16PJ convient pour 6 applications: Breadboard Prototyping and Embedded Education, Industrial Control Panels and Relay Sequencing, Analog Sensor Nodes with On-Board ADC, Legacy Equipment Maintenance and Repair, Motor Control and PWM Actuation, Serial Communication Bridges and Data Loggers.
Breadboard Prototyping and Embedded Education
The ATMEGA32-16PJ is a staple of university embedded-systems labs and maker prototyping because its 40-PDIP through-hole package plugs directly into solderless breadboards and machined-pin sockets without adapters. The 4.5V-5.5V supply and 16 MHz clock match standard lab bench power supplies and crystal oscillators, while the 8-channel 10-bit ADC lets students wire potentiometers and sensors directly to PORTA. The SPI in-system programming interface requires only a 6-wire header, and the open-source MightyCore Arduino hardware package provides immediate toolchain support. Compared with TQFP/QFN surface-mount MCUs, the 0.1 in pin pitch tolerates repeated rework, making the DIP-40 ATmega32 the lowest-friction path from schematic to running code.
Recommandé
Industrial Control Panels and Relay Sequencing
In industrial control panels, the ATMEGA32-16PJ's 5V logic provides superior noise margins over 3.3V MCUs when driving optocouplers and relay coils through ULN-class drivers. Its 32KB self-programming Flash stores control state machines and allows field firmware updates through a bootloader without removing the socketed DIP part. Three timers with PWM outputs sequence heaters, pumps, and motor drives, while the UART connects to Modbus-style ASCII protocols on panel networks. The 10-bit ADC reads analog setpoint potentiometers and back-EMF feedback. Because the DIP-40 package is socketed, maintenance technicians can replace a failed controller in minutes with a spare ATMEGA32-16PI industrial-grade unit, minimizing production downtime versus desoldering an SMD device.
Recommandé
Analog Sensor Nodes with On-Board ADC
Sensor acquisition nodes benefit from the ATMEGA32-16PJ's 8-channel 10-bit ADC, which multiplexes up to eight analog inputs such as thermistors, LDRs, and pressure bridges through a single converter with an internal reference. The 2KB SRAM buffers sample blocks for averaging and filtering, while the 1KB EEPROM stores per-channel calibration coefficients that survive power cycles. The TWI (I2C) bus extends the system with external EEPROMs and RTCs, and the UART streams processed values to a host or data logger. At 16 MHz the AVR core executes digital filter routines fast enough for kHz-rate sampling. The 5V supply also lets the ADC reference match legacy 0-5V industrial sensor outputs directly, eliminating level-shifting front ends.
Recommandé
Legacy Equipment Maintenance and Repair
Service organizations maintaining legacy industrial and consumer equipment stock the ATMEGA32-16PJ because thousands of shipped products used socketed ATmega32 controllers, and the DIP-40 format allows board-level replacement with hand tools. When the original 16PJ is unavailable, the ATMEGA32A-PU successor die drops into the same socket with unchanged firmware, since Microchip preserved pinout and register compatibility across the family. The JTAG interface lets technicians dump and verify Flash contents from suspect units before replacement, and self-programming Flash supports reflashing repaired boards in-circuit. Sourcing from distributors with active stock, such as the 6,688 pieces reported by one supplier, keeps long-tail service inventories viable without gray-market risk.
Recommandé
Motor Control and PWM Actuation
The ATMEGA32-16PJ integrates two 8-bit timers and one 16-bit timer with output-compare channels that generate independent PWM outputs on PD4/PD5 (OC1A/OC1B) and PB3 (OC0), suiting DC motor speed control, servo actuation, and LED dimming. At 16 MHz, the 16-bit Timer1 resolves PWM at high frequency with good duty-cycle granularity, and the input-capture unit (ICP1) measures encoder or echo pulses with single-clock resolution. The 131-instruction RISC core executes PI control loops with deterministic single-cycle timing, avoiding the jitter of interpreted approaches. Driving a dual H-bridge from the PWM pins with the 5V logic levels eliminates level translation. The JTAG debug interface lets engineers watch timer registers live during commissioning.
Recommandé
Serial Communication Bridges and Data Loggers
The ATMEGA32-16PJ carries UART/USART, SPI, and TWI (I2C) hardware simultaneously, letting one 16 MHz core bridge protocols such as UART-to-SPI for interfacing legacy serial devices to modern peripherals. The 32KB Flash holds generous protocol stacks and ring buffers, while the 2KB SRAM sustains multi-hundred-byte FIFOs at sustained UART rates up to 1 Mbps-class clocking derived from the system clock. The 1KB EEPROM can log configuration and rolling counters, and a bootloader over UART enables field reconfiguration without a programmer. Applications include access-control readers, HVAC head-ends, and instrument front panels. With both 5V logic and DIP-40 hand-serviceability, bridges built on this part remain repairable for the life of the installed base.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATMEGA32-16PJ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATMEGA32-16PI | ATMEGA32A-PU | ATMEGA32L-8PU | ATMEGA16A-PU | ATMEGA8535-16PU |
|---|---|---|---|---|---|---|
| Package | 40-PDIP (0.600 in, 15.24 mm) | 40-PDIP - same | 40-PDIP - same | 40-PDIP - same | 40-PDIP - same | 40-PDIP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB | 8 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 1 KB | 512 B |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 512 B | 512 B |
| Max Clock Frequency | 16 MHz | 16 MHz | 16 MHz | 8 MHz | 16 MHz | 16 MHz |
| Supply Voltage | 4.5 V to 5.5 V (16 MHz grade) | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 2.7 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| JTAG On-Chip Debug | Yes | Yes | Yes | Yes | Yes | Yes |
Principaux différenciateurs
- Double the program memory of the reduced-memory same-pinout cousins (vs ATMEGA16A-PU)
- Full-speed 16 MHz operation at 5V logic levels (vs ATMEGA32L-8PU)
- JTAG on-chip debug retained on the DIP-40 package (vs ATMEGA8535-16PU)
- Direct migration path to the refreshed ATmega32A die (vs ATMEGA32A-PU)
Notes de conception
Power the ATMEGA32-16PJ at 4.5V-5.5V for the 16 MHz speed grade; below 4.5V the maximum safe clock drops along the datasheet voltage-frequency curve and marginal units may fail sporadically. Decouple VCC (pin 10) and AVCC (pin 30) with 100 nF ceramics placed within 5 mm of each pin, and connect AVCC to VCC through a 10 uH inductor or 10-ohm resistor plus 100 nF filter so switching noise does not corrupt the 10-bit ADC. Estimated: a fully loaded 16 MHz core plus outputs draws roughly 15-25 mA, so a 100 mA linear regulator provides ample margin.
For breadboard prototyping, keep the crystal within 25 mm of XTAL1/XTAL2 (pins 13/12) with 22 pF load capacitors directly to the nearest ground return; long breadboard leads on the crystal path are the number-one cause of intermittent 16 MHz start-up failure. Route the ADC ground return (pin 31) as a star connection back to the regulator rather than daisy-chaining through PORTB, and keep AREF (pin 32) bypassed with 100 nF when using the internal or AVCC reference. When socketing the DIP-40, use machined-pin sockets to avoid contact-oxidation issues that plague stamped dual-wipe sockets.
Three recurring pitfalls with this part: (1) leaving JTAG enabled (PC2-PC5) consumes those four port pins - disable it via the JTD bit in MCUCSR at startup if you need full PORTC I/O; (2) forgetting to disable the clock prescaler fuse on some programmer profiles halves the effective clock to 1 MHz, a frequent cause of 'my UART baud is wrong' reports; (3) firmware compiled for the ATmega32A successor is register-compatible, but if migrating to ATMEGA16A-PU, verify the reduced 16KB Flash / 1KB SRAM budget at link time. Source: Microchip ATmega32 datasheet Errata and AVR application note guidance.
The ATMEGA32-16PJ dissipates minimal power in typical embedded use, so heatsinking is unnecessary. Estimated worst case at 5.5V, 16 MHz with all 32 I/O sourcing 20 mA is roughly 0.5-0.8 W; the PDIP package's ~80 C/W theta_JA would then raise junction temperature by about 40-64 C above ambient, still within the industrial rating. Only designs sourcing maximum current on many pins simultaneously in a sealed enclosure warrant a thermal check - spread loads across ports or use external drivers instead.
Informations de conformité
Compliance data was not present in the provided verified web data; consult the Microchip product page and environmental datasheet for current RoHS/REACH status of the ATMEGA32-16PJ ordering code.
