ATMEGA16L-8PC - 8-bit AVR MCU 16KB Flash 8MHz 40-PDIP | Microchip
MPN: ATMEGA16L-8PC ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.88 | $28.80 |
| 100 | $2.56 | $256.00 |
| 500 | $2.3 | $1,150.00 |
| 1,000 | $2.05 | $2,050.00 |
ATMEGA16L-8PC Overview
An AVR microcontroller is a family of 8-bit RISC MCUs originally developed by Atmel and now manufactured by Microchip Technology. AVR cores execute most instructions in a single clock cycle, achieving up to 8 MIPS at 8MHz, and sit within the broader MCU hierarchy of embedded processors used for real-time embedded control.
Key features include 131 powerful instructions with single-cycle execution, 32 general-purpose 8-bit registers, an 8-channel 10-bit ADC, four PWM channels, a JTAG interface for on-chip debugging and boundary scan, plus USART, SPI and TWI (I2C) serial interfaces. Program memory endures at least 10,000 Flash write/erase cycles, with optional boot-code section for in-system programming.
Architecturally, the Harvard design separates program and data buses, allowing simultaneous access to instruction and data memory. The low-power L variant targets battery-powered designs, with idle and power-down sleep modes reducing consumption during inactivity.
Typical applications include industrial control panels, LED and keypad-driven human-machine interfaces, motor and relay control boards, hobbyist and educational platforms, and 3.3V battery-powered instruments where the wide 2.7V to 5.5V range and through-hole 40-PDIP package simplify prototyping and rework.
For design, remember the PDIP version is limited to 8MHz and 16MHz-grade timing only at 5V on the non-L variants; keep decoupling capacitors close to VCC and AVCC, and tie RESET properly for ISP programming.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATMEGA16L-8PC — 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 ATMEGA16L-8PC (same form factor and footprint) — differing in EEPROM, SRAM, Package, Communication Interfaces, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA16L-8PU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$3.55 / Unit
View Datasheet →ATMEGA16A-PU
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATMEGA32A-PU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$3.85 / Unit
View Datasheet →ATMEGA8535L-8PU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.92 / Unit
View Datasheet →ATMEGA16L-8PI
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.98 / Unit
View Datasheet →ATMEGA16L-8PC Maximum Ratings & Electrical Characteristics
| Core | 8-bit AVR RISC |
| Maximum Clock Frequency | 8 MHz |
| Flash Program Memory | 16 KB (8K x 16) |
| SRAM | 1 KB (1K x 8) |
| EEPROM | 512 Bytes (512 x 8) |
| Operating Voltage Range | 2.7 V to 5.5 V |
| ADC Resolution | 10-bit, 8 channels |
| PWM Channels | 4 |
| Communication Interfaces | USART, SPI, TWI (I2C) |
| JTAG | Yes (on-chip debug and boundary scan) |
| General Purpose I/O | 32 |
| Package | 40-PDIP (0.600 in, 15.24 mm) |
| Mounting Type | Through Hole |
| Program Memory Endurance | 10,000 write/erase cycles (typical AVR spec) |
| RoHS Status | Compliant |
| In-System Programmable | Yes (ISP via SPI) |
ATMEGA16L-8PC Pin Configuration
| Pin 1 | PB0 (XCK/T0) — Port B bit 0 / USART external clock / Timer0 external clock |
| Pin 2 | VCC — Digital supply voltage (2.7V to 5.5V) |
| Pin 3 | GND — Ground |
| Pin 4 | PB1 (T1) — Port B bit 1 / Timer1 external clock |
| Pin 5 | PB2 (AIN0/INT2) — Port B bit 2 / analog comparator positive input / external interrupt 2 |
| Pin 6 | PB3 (OC0/AIN1) — Port B bit 3 / Timer0 PWM output / analog comparator negative input |
| Pin 7 | PB4 (SS) — Port B bit 4 / SPI slave select |
| Pin 8 | PB5 (MOSI) — Port B bit 5 / SPI master output, slave input / ISP programming data |
| Pin 9 | PB6 (MISO) — Port B bit 6 / SPI master input, slave output / ISP programming data |
| Pin 10 | PB7 (SCK) — Port B bit 7 / SPI serial clock / ISP programming clock |
| Pin 11 | RESET — Reset input, active low; also used by ISP programming |
| Pin 12 | PD0 (RXD) — Port D bit 0 / USART receive |
| Pin 13 | PD1 (TXD) — Port D bit 1 / USART transmit |
| Pin 14 | PD2 (INT0) — Port D bit 2 / external interrupt 0 |
| Pin 15 | PD3 (INT1) — Port D bit 3 / external interrupt 1 |
| Pin 16 | PD4 (OC1B) — Port D bit 4 / Timer1 PWM output B |
| Pin 17 | PD5 (OC1A) — Port D bit 5 / Timer1 PWM output A |
| Pin 18 | PD6 (ICP1) — Port D bit 6 / Timer1 input capture |
| Pin 19 | PD7 (OC2) — Port D bit 7 / Timer2 PWM output |
| Pin 20 | PA0 (ADC0) — Port A bit 0 / ADC channel 0 |
| Pin 21 | PA1 (ADC1) — Port A bit 1 / ADC channel 1 |
| Pin 22 | PA2 (ADC2) — Port A bit 2 / ADC channel 2 |
| Pin 23 | PA3 (ADC3) — Port A bit 3 / ADC channel 3 |
| Pin 24 | PA4 (ADC4) — Port A bit 4 / ADC channel 4 |
| Pin 25 | PA5 (ADC5) — Port A bit 5 / ADC channel 5 |
| Pin 26 | PA6 (ADC6) — Port A bit 6 / ADC channel 6 |
| Pin 27 | PA7 (ADC7) — Port A bit 7 / ADC channel 7 |
| Pin 28 | AREF — ADC analog reference voltage |
| Pin 29 | AGND — Analog ground for ADC |
| Pin 30 | AVCC — ADC supply voltage (connected to VCC via low-pass filter) |
| Pin 31 | PC0 (T3/SCL) — Port C bit 0 / TWI serial clock (SCL) |
| Pin 32 | PC1 (T4/SDA) — Port C bit 1 / TWI serial data (SDA) |
| Pin 33 | PC2 (TCK) — Port C bit 2 / JTAG test clock |
| Pin 34 | PC3 (TMS) — Port C bit 3 / JTAG test mode select |
| Pin 35 | PC4 (TDO) — Port C bit 4 / JTAG test data output |
| Pin 36 | PC5 (TDI) — Port C bit 5 / JTAG test data input |
| Pin 37 | PC6 (TOSC1) — Port C bit 6 / Timer2 oscillator input (32.768 kHz watch crystal) |
| Pin 38 | PC7 (TOSC2) — Port C bit 7 / Timer2 oscillator output |
| Pin 39 | XTAL1 — Main system clock oscillator input |
| Pin 40 | XTAL2 — Main system clock oscillator output |
Typical Applications
ATMEGA16L-8PC is suitable for 6 applications: Industrial Control Panels, Human-Machine Interface (HMI) Keypad and Display Boards, Battery-Powered Measurement Instruments, Motor Control and PWM Actuation, Education and Prototyping Platforms, Legacy 5V Embedded Retrofit and Repair.
Industrial Control Panels
The ATMEGA16L-8PC fits industrial control panels where 5V logic drives relays, contactors and status indication. Its 32 GPIO lines map directly to button matrices, limit-switch inputs and LED banks, while the four PWM channels generate dimming or actuator setpoints. The 2.7V to 5.5V supply range tolerates regulator droop, and the 8MHz AVR core executing most instructions in one cycle handles polling loops deterministically. The 512B EEPROM stores calibration constants and trip counters across power cycles, and the JTAG interface permits in-panel firmware debugging during commissioning without desoldering the through-hole part.
Recommended
Human-Machine Interface (HMI) Keypad and Display Boards
For HMI boards combining keypads and character or graphic displays, the ATMEGA16L-8PC offers enough I/O to scan a 4x4 keypad on one port while driving an LCD on another, with SPI or TWI remaining free for external peripherals. Its 1KB SRAM accommodates display frame buffers for small dot-matrix panels, and the 10-bit ADC reads potentiometers or resistive touch elements on port A. The wide 2.7V to 5.5V operation lets one firmware serve 3.3V and 5V display modules. The 40-PDIP package is ideal for serviceable front-panel boards where field replacement by technicians is expected.
Recommended
Battery-Powered Measurement Instruments
The L variant of the ATmega16 was designed for low-voltage, battery-fed instruments. Operating from 2.7V, it runs directly from two AA cells or a single lithium cell through an LDO, while the idle and power-down sleep modes cut average consumption for long battery life. The 8-channel 10-bit ADC digitizes sensor arrays - thermistors, strain bridges, pH probes - and the USART streams readings to a PC or logger at standard baud rates. The 16KB Flash typically holds both the acquisition engine and a simple menu UI, and EEPROM preserves calibration data even after battery exhaustion.
Recommended
Motor Control and PWM Actuation
The ATMEGA16L-8PC provides four hardware PWM outputs: two 8-bit channels (OC0, OC2) and two 16-bit channels (OC1A, OC1B), enabling independent control of DC motor drivers, servo position loops and LED intensity from one chip. Input Capture (ICP1) measures period and duty of encoder or echo signals with timer resolution, supporting closed-loop speed control. The interrupt structure (INT0, INT1, INT2 plus pin-change vectors) permits fast fault shutdown. For hobby robotics and 5V H-bridge boards, the 40-pin through-hole package simplifies hand assembly and repair in small production runs.
Recommended
Education and Prototyping Platforms
The ATMEGA16L-8PC is a mainstay of embedded-systems teaching and breadboard prototyping. The 0.6-inch 40-PDIP package inserts directly into breadboards and ZIF sockets, students can reprogram it thousands of times through the SPI ISP header using low-cost USBasp tools, and the JTAG port supports professional debug workflows. The AVR architecture with 131 single-cycle instructions and 32 registers is straightforward to teach in assembly or C with avr-gcc and Arduino-style frameworks. The 2.7V to 5.5V range means labs can safely power boards from USB 5V or battery packs without level-shifting concerns.
Recommended
Legacy 5V Embedded Retrofit and Repair
Many installed 5V boards - HVAC controllers, vending machines, test jigs - were built around the ATmega16 in PDIP. The ATMEGA16L-8PC and its drop-in equivalents allow board-level repair without redesign: the identical pinout and code compatibility mean a failed socketed chip can be swapped and re-flashed in minutes. The 512B EEPROM can be pre-loaded with serialized unit data during refurbishment, and the 16KB Flash absorbs patched firmware. Stocking the RoHS ATMEGA16L-8PU or ATMEGA16A-PU covers nearly all legacy ATmega16 repair scenarios while meeting modern hazardous-substance rules.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA16L-8PC — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA16L-8PU | ATMEGA16A-PU | ATMEGA32A-PU | ATMEGA8535L-8PU |
|---|---|---|---|---|---|
| Package | 40-PDIP (0.600 in) | 40-PDIP (0.600 in) - same | 40-PDIP (0.600 in) - same | 40-PDIP (0.600 in) - same | 40-PDIP (0.600 in) - same |
| Brand | Microchip Technology (originally Atmel) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 16 KB | 16 KB | 16 KB | 32 KB | 8 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 2 KB | 512 B |
| EEPROM | 512 B | 512 B | 512 B | 1 KB | 512 B |
| Operating Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Maximum Clock Frequency | 8 MHz | 8 MHz | 16 MHz | 16 MHz | 8 MHz |
| Temperature Range | 0 C to +70 C | 0 C to +70 C (PI version -40 C to +85 C) | -40 C to +85 C | -40 C to +85 C | 0 C to +70 C |
Key Differentiators
- Full 16KB Flash in the classic 40-pin DIP footprint (vs ATMEGA8535L-8PU)
- Wide 2.7V to 5.5V low-voltage operation (vs ATMEGA16-16PC)
- Modern production alternative available (vs ATMEGA16A-PU)
Design Notes
Decouple VCC (pin 2) with a 100nF ceramic capacitor placed within 5mm of the pin, plus a 10uF bulk capacitor near the board supply entry. Connect AVCC (pin 30) to VCC through a low-pass filter (10uH inductor or 100-ohm resistor plus 100nF) to isolate ADC noise from digital switching. Tie AGND (pin 29) to a clean analog ground region. If using the internal 2.56V ADC reference, add a 100nF capacitor on AREF (pin 28); do not drive AREF externally while the internal reference is enabled.
Three issues commonly affect first-time ATmega16 designs. First, the PC0/PC1 pins double as TWI SCL/SDA - if TWI is disabled but the pins are driven externally, check the port configuration to avoid contention. Second, the JTAGEN fuse is factory-set and JTAG occupies PC2-PC5; if those four GPIO are needed, disable JTAG via fuse programming (a single ISP operation, but irreversible without HV programming once lock bits are set carelessly). Third, RESET (pin 11) needs a 10k pull-up; leaving it floating causes sporadic resets in noisy industrial environments.
Estimated: at 5V, 8MHz, and a typical 15mA active supply current, power dissipation is roughly 75mW, producing negligible junction temperature rise in the 40-PDIP package - no heatsinking is ever required. However, ensure total per-port sink current stays within the datasheet absolute maximum (200mA total across all ports, with per-pin limits) when driving multiple LEDs directly. Estimated: driving 8 LEDs at 20mA each draws 160mA, approaching the combined port limit, so use transistor drivers or higher-efficiency LEDs for dense indicator arrays.
Compliance Information
DigiKey and Mouser list the ATMEGA16L-8PC as RoHS compliant. Historical PC-suffix parts were lead-containing; current stock and the PU suffix are lead-free. REACH and halogen-free status not stated in provided data.
