ATMEGA162-16PJ - 16MHz AVR 8-Bit MCU 16KB Flash | Microchip
MPN: ATMEGA162-16PJ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.85 | $38.50 |
| 100 | $3.4 | $340.00 |
| 500 | $3.05 | $1,525.00 |
| 1,000 | $2.75 | $2,750.00 |
ATMEGA162-16PJ Overview
A microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals such as UARTs, timers, and SPI. The ATmega162 belongs to the AVR family of 8-bit microcontrollers, positioned below the ATmega128 and above smaller parts such as the ATmega8 in the memory-size hierarchy. MCUs like this one serve as the main control element in embedded systems, replacing discrete logic and simplifying board-level design.
Key features of the ATMEGA162-16PJ include 131 powerful instructions with mostly single-clock-cycle execution, eight general-purpose working registers, and fully static operation up to 16 MHz. Two enhanced 8-bit and 16-bit timer/counters, two full-duplex USARTs, SPI, and on-chip debug via JTAG differentiate it from the plain ATmega16. The self-programming Flash enables in-system bootloader firmware updates.
Architecturally, the AVR core uses a Harvard structure with separate program and data buses, allowing one instruction to fetch while another executes. The 16 KB Flash is organized as 8K x 16 for program storage, and the 512-byte EEPROM retains calibration data through power cycles. In-Circuit Serial Programming (ICSP) uses two I/O pins plus reset.
Typical applications include industrial control panels, serial communication bridges (thanks to dual USARTs), legacy through-hole equipment maintenance, hobby and educational embedded platforms, and motor control boards where a DIP socket simplifies field replacement.
When designing with the ATMEGA162-16PJ, note that the 16 MHz rating applies only at 4.5 V to 5.5 V supply; the commercial temperature suffix J covers 0 C to +70 C, so use the -16PI industrial variant for extended environments.
This page synthesizes distributor stock data, drop-in alternatives, pinout details, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATMEGA162-16PJ — 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 ATMEGA162-16PJ (same form factor and footprint) — differing in Operating Temperature, Timers, Flash Program Memory, Mounting Type, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA162-16PI
✅ Drop-In✓ In Stock
$3.55 / Unit
View Datasheet →ATMEGA162-16PC
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →ATMEGA16-16PI
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$3.72 / Unit
View Datasheet →ATMEGA16-16PC
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$4.48 / Unit
View Datasheet →ATMEGA162-16PJ Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit AVR RISC |
| Max CPU Frequency | 16 MHz |
| Flash Program Memory | 16 KB (8K x 16), self-programming |
| SRAM | 1 KB |
| EEPROM | 512 Bytes |
| Throughput | 16 MIPS at 16 MHz |
| Instruction Set | 131 instructions, mostly single-cycle |
| Supply Voltage Range | 4.5 V to 5.5 V (16 MHz speed grade) |
| USARTs | 2 full-duplex |
| Timers | 2 (8-bit and 16-bit) |
| Debug Interface | JTAG for on-chip debug |
| Programming | ICSP in-circuit serial programming; boot loader support |
| Operating Temperature | 0 C to +70 C (J suffix) |
| Package | 40-PDIP (0.600 in, 15.24 mm) |
| Mounting Type | Through-Hole |
| General Purpose I/O | 32 I/O lines (PA, PB, PC, PD) |
ATMEGA162-16PJ Pin Configuration
| Pin 1 | PB6 (TOSC2) — Port B bit 6 / Timer oscillator output |
| Pin 2 | PB7 (TOSC1) — Port B bit 7 / Timer oscillator input |
| Pin 3 | RESET — Active-low reset input |
| Pin 4 | VCC — Digital supply voltage |
| Pin 5 | GND — Ground |
| Pin 6 | XTAL2 — Crystal oscillator output |
| Pin 7 | XTAL1 — Crystal oscillator input / external clock |
| Pin 8 | PD0 (RXD0) — Port D bit 0 / USART0 receive |
| Pin 9 | PD1 (TXD0) — Port D bit 1 / USART0 transmit |
| Pin 10 | PD2 (INT0) — Port D bit 2 / External interrupt 0 |
| Pin 11 | PD3 (INT1) — Port D bit 3 / External interrupt 1 |
| Pin 12 | PD4 (OC1B) — Port D bit 4 / Timer1 output compare B |
| Pin 13 | PD5 (OC1A) — Port D bit 5 / Timer1 output compare A |
| Pin 14 | PD6 (ICP1) — Port D bit 6 / Timer1 input capture |
| Pin 15 | PD7 — Port D bit 7 |
| Pin 16 | PC0 — Port C bit 0 |
| Pin 17 | PC1 — Port C bit 1 |
| Pin 18 | PC2 — Port C bit 2 |
| Pin 19 | PC3 — Port C bit 3 |
| Pin 20 | PC4 — Port C bit 4 |
| Pin 21 | PC5 — Port C bit 5 |
| Pin 22 | PC6 — Port C bit 6 |
| Pin 23 | PC7 — Port C bit 7 |
| Pin 24 | PA7 — Port A bit 7 |
| Pin 25 | PA6 — Port A bit 6 |
| Pin 26 | PA5 — Port A bit 5 |
| Pin 27 | PA4 — Port A bit 4 |
| Pin 28 | PA3 — Port A bit 3 |
| Pin 29 | PA2 — Port A bit 2 |
| Pin 30 | PA1 — Port A bit 1 |
| Pin 31 | PA0 — Port A bit 0 |
| Pin 32 | AREF — ADC analog reference |
| Pin 33 | AVCC — Analog supply voltage |
| Pin 34 | PB0 — Port B bit 0 |
| Pin 35 | PB1 — Port B bit 1 |
| Pin 36 | PB2 — Port B bit 2 |
| Pin 37 | PB3 — Port B bit 3 |
| Pin 38 | PB4 — Port B bit 4 |
| Pin 39 | PB5 — Port B bit 5 |
| Pin 40 | GND — Ground |
Typical Applications
ATMEGA162-16PJ is suitable for 6 applications: Industrial Control Panels, Serial Protocol Converters and Bridges, Legacy Equipment Maintenance and Repair, Hobby and Educational Embedded Platforms, Embedded Instrumentation and Data Loggers, Motor Control and Power Supervision Boards.
Industrial Control Panels
The ATMEGA162-16PJ fits industrial control panels where a socketed through-hole MCU simplifies field service. Its 5 V operation (4.5 V to 5.5 V) directly interfaces with legacy 74-series logic, relays, and opto-isolated inputs common in retrofit projects, while 16 MIPS throughput at 16 MHz handles state machines and PID loops without an external co-processor. The 512-byte EEPROM stores setpoints and calibration constants that survive power loss, and the 16 KB self-programming Flash allows firmware updates via boot loader without a programmer on site. Using the 40-pin PDIP in a machined socket means a technician can replace the controller in minutes, minimizing production downtime.
Recommended
Serial Protocol Converters and Bridges
The dual full-duplex USARTs of the ATMEGA162-16PJ make it the natural AVR choice for RS-232 to RS-485 gateways, UART-to-SPI bridges, and modem-plus-console designs. With two independent hardware serial ports, one link can carry the field bus while the second provides diagnostics, all at hardware speed without bit-banging overhead that consumes the 16 MIPS budget. The AVR core's single-cycle instruction execution keeps ISR latency low at high baud rates, and 1 KB SRAM buffers packet bursts. Because both ports are hardware peripherals, the second UART is exactly why engineers select the ATmega162 over the ATmega16 in the same 40-pin PDIP socket.
Recommended
Legacy Equipment Maintenance and Repair
The ATMEGA162-16PJ is ideal for maintaining and repairing legacy through-hole equipment because the 40-pin 0.600-inch PDIP plugs directly into existing DIP-40 sockets used by ATmega16-class controllers. Repair shops benefit from its 5 V rail compatibility with older boards, and the JTAG on-chip debug interface allows troubleshooting firmware behavior in the original hardware without desoldering anything. The 16 MHz rating restores original speed grades, and identical pin function across the ATmega162 family means no PCB cuts or bodge wires. Stocking the -16PI variant alongside the -16PJ covers both commercial and industrial field environments with one spare-part strategy.
Recommended
Hobby and Educational Embedded Platforms
Through-hole DIP packaging makes the ATMEGA162-16PJ highly accessible for education and prototyping: students can insert it into a breadboard or DIP-40 carrier, swap it freely, and reprogram it via ICSP using only two I/O pins plus reset. The 16 KB self-programming Flash supports simple boot loaders written in the 512 bytes of EEPROM-backed configuration space, teaching firmware-update concepts without dedicated programmers. At 16 MIPS the device comfortably runs C programs compiled with avr-gcc, and the JTAG interface introduces professional on-chip debugging workflows. Dual USARTs even allow one port for a PC terminal while the second drives classroom peripherals.
Recommended
Embedded Instrumentation and Data Loggers
In measurement instrumentation and data logging, the ATMEGA162-16PJ combines a 16 MHz ADC-driven sampling loop with 512 bytes of EEPROM for on-device calibration constants and 1 KB SRAM for sample buffering. Two USARTs let the logger stream data to one channel while accepting commands on another, and the 16 KB Flash hosts both application and boot loader for remote firmware updates. The JTAG interface enables on-chip debugging during instrument development, shortening time to calibration. Its fully static core allows clock throttling to reduce noise in sensitive analog front ends, an important consideration when sampling precision sensors on a 5 V industrial rail.
Recommended
Motor Control and Power Supervision Boards
The ATMEGA162-16PJ serves motor control and power supervision boards where its two timer/counters generate PWM while the dual USARTs report status to a supervisory controller. At 16 MIPS, closed-loop current control at typical switching frequencies remains within the core's budget, and 32 GPIO lines drive gate drivers, contactors, and indicator banks from a single DIP-40 device. The 5 V supply domain matches common gate-driver input thresholds, simplifying level-shifting design. Because the 40-pin PDIP socket tolerates field replacement, power electronics integrators can swap controllers after a fault event without reflow equipment, reducing mean time to repair in the field.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA162-16PJ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA162-16PI | ATMEGA162-16PC | ATMEGA16-16PI | ATMEGA16-16PC |
|---|---|---|---|---|---|
| Package | 40-PDIP (0.600 in) | 40-PDIP - same | 40-PDIP - same | 40-PDIP - same | 40-PDIP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Max Clock Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| USART Count | 2 | 2 | 2 | 1 | 1 |
| Operating Temperature | 0 C to +70 C | -40 C to +85 C | 0 C to +70 C | -40 C to +85 C | 0 C to +70 C |
| JTAG On-Chip Debug | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Dual hardware USARTs in a 40-pin DIP socket (vs ATMEGA16-16PI)
- JTAG on-chip debugging in through-hole form (vs ATMEGA16-16PC)
- Temperature-grade flexibility within the same die (vs ATMEGA162-16PI)
Design Notes
Power the ATMEGA162-16PJ from a regulated 5 V rail within 4.5 V to 5.5 V; the 16 MHz speed grade is only guaranteed across this window per Microchip documentation. Place 100 nF ceramic decoupling capacitors at both VCC (pin 4) and AVCC (pin 33) as close to the pins as possible, plus 10 uF bulk capacitance near the regulator. Tie AVCC to VCC through a low-pass LC filter when using ADC functions to reject digital supply noise.
Even in a through-hole design, keep the crystal and its two load capacitors within 15 mm of XTAL1/XTAL2 (pins 7-8) with short ground return paths to avoid start-up failures at 16 MHz. Route the JTAG header (TDI/TDO/TMS/TCK on port C) to a standard 2x5 header early in layout, since on-chip debugging later saves hours. Provide a wide ground plane or ground grid to keep USART lines and switching loads from modulating the analog reference.
Verify fuse settings before deployment: leaving JTAG enabled consumes port C pins PC2-PC5, which is a common cause of 'missing I/O' complaints. Also confirm clock fuses match your crystal - an external 16 MHz crystal with wrong CKSEL fuses can leave the chip running on the internal RC at reduced accuracy. The -16PJ is commercial grade (0 C to +70 C); do not deploy it outdoors or in unheated enclosures - use ATMEGA162-16PI instead.
Compliance Information
Compliance data was not present in the provided web sources; confirm RoHS/REACH status on the official Microchip product page before export.
