ATMEGA162V-8AUR - 8-bit AVR MCU 16KB Flash 8MHz | Microchip
MPN: ATMEGA162V-8AUR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $10.25 | $10.25 |
| 10 | $9.22 | $92.20 |
| 100 | $8.19 | $819.00 |
| 500 | $7.36 | $3,680.00 |
| 1,000 | $6.62 | $6,620.00 |
ATMEGA162V-8AUR Overview
An 8-bit AVR microcontroller is a Harvard-architecture processor that executes most instructions in a single clock cycle, achieving throughput approaching 1 MIPS per MHz. Within the power-management hierarchy, the ATmega family sits at the general-purpose MCU level, bridging small 8-pin devices and larger ATmega128-class parts. This allows system designers to optimize power consumption versus processing speed across applications.
Key differentiating features include the external memory interface, which is rare in 16KB-class MCUs and enables SRAM or memory-mapped peripheral expansion; 35 general purpose I/O lines; a JTAG interface supporting Boundary-scan, On-chip Debugging, and JTAG programming; and four flexible Timer/Counters with compare modes. These attributes make it a strong fit for systems that need legacy parallel buses plus UART, SPI, and TWI connectivity.
Architecturally, the ATmega162 provides 32 general purpose working registers directly connected to the ALU, allowing one-cycle instruction execution. The 16KB Flash supports Read-While-Write operation for reliable field firmware updates through the bootloader channel, while the 512B EEPROM retains calibration and configuration data through power cycles. In-circuit programming via SPI and JTAG debug both reduce development time on final hardware.
Typical applications include industrial control panels, communication adapters using its two USARTs, battery-operated instrumentation that benefits from the wide 1.8V-5.5V V range, and legacy embedded designs where the external bus offloads display or memory expansion. Its 8MHz rating at low voltage gives predictable timing headroom for UART-heavy protocols.
When designing with the ATMEGA162V-8AUR, remember that the maximum safe clock at the lowest supply voltages should be derated per the Microchip frequency-versus-voltage curve, and decouple AVCC/VCC with 100nF ceramics placed close to pins 13/14.
This page adds value beyond the datasheet by combining verified distributor availability, drop-in same-family alternatives, a full TQFP-44 pinout, and practical design notes in one AI-friendly reference.
Drop-in alternatives for ATMEGA162V-8AUR β 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 ATMEGA162V-8AUR (same form factor and footprint) β differing in Flash Memory, Package, Core Architecture, Debug Interface, General Purpose I/O.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMEGA162V-8AU
β Drop-Inπ Reference alternative (not in catalog)
ATMEGA162-16AUR
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA162V-1AUR
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA162-16AU
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA16-16AU
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$4.41 / Unit
View Datasheet βATMEGA162V-8AUR Maximum Ratings & Electrical Characteristics
| Core Architecture | AVR 8-bit RISC |
| Max Clock Frequency | 8 MHz |
| Flash Memory | 16 KB (8K x 16) |
| SRAM | 1 KB |
| EEPROM | 512 B |
| Operating Voltage Range | 1.8 V to 5.5 V |
| General Purpose I/O | 35 I/O lines |
| Timer/Counters | 4 flexible Timer/Counters with compare modes |
| USART Channels | 2 |
| External Memory Interface | Yes |
| Debug Interface | JTAG (Boundary-scan, On-chip Debug, Programming) |
| Package | 44-TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (R suffix) |
| Throughput | Approaching 1 MIPS per MHz |
| RoHS Status | Compliant |
ATMEGA162V-8AUR Pin Configuration
| Pin 1 | PA4 (AD4) β Port A bit 4 / external memory address-data bus bit 4 |
| Pin 2 | PA5 (AD5) β Port A bit 5 / external memory address-data bus bit 5 |
| Pin 3 | PA6 (AD6) β Port A bit 6 / external memory address-data bus bit 6 |
| Pin 4 | PA7 (AD7) β Port A bit 7 / external memory address-data bus bit 7 |
| Pin 5 | PC7 (A15) β Port C bit 7 / external memory address line A15 |
| Pin 6 | PC6 (A14) β Port C bit 6 / external memory address line A14 |
| Pin 7 | PC5 (A13) β Port C bit 5 / external memory address line A13 |
| Pin 8 | PC4 (A12) β Port C bit 4 / external memory address line A12 |
| Pin 9 | PC3 (A11) β Port C bit 3 / external memory address line A11 |
| Pin 10 | PC2 (A10) β Port C bit 2 / external memory address line A10 |
| Pin 11 | PC1 (A9) β Port C bit 1 / external memory address line A9 |
| Pin 12 | PC0 (A8) β Port C bit 0 / external memory address line A8 |
| Pin 13 | GND β Ground |
| Pin 14 | VCC β Digital supply voltage (1.8 V to 5.5 V) |
| Pin 15 | PB0 (XCK0/T0) β Port B bit 0 / USART0 external clock / Timer0 external clock |
| Pin 16 | PB1 (T1) β Port B bit 1 / Timer1 external clock input |
| Pin 17 | PB2 (AIN0/INT2) β Port B bit 2 / analog comparator input 0 / external interrupt 2 |
| Pin 18 | PB3 (AIN1/OC0) β Port B bit 3 / analog comparator input 1 / Timer0 output compare PWM |
| Pin 19 | PB4 (SS) β Port B bit 4 / SPI slave select |
| Pin 20 | PB5 (MOSI) β Port B bit 5 / SPI Master Out Slave In / ISP programming |
| Pin 21 | PB6 (MISO) β Port B bit 6 / SPI Master In Slave Out / ISP programming |
| Pin 22 | PB7 (SCK) β Port B bit 7 / SPI serial clock / ISP programming |
| Pin 23 | PD7 (OC2) β Port D bit 7 / Timer2 output compare PWM |
| Pin 24 | PD6 (ICP1) β Port D bit 6 / Timer1 input capture |
| Pin 25 | PD5 (OC1A) β Port D bit 5 / Timer1 output compare A PWM |
| Pin 26 | PD4 (XCK1/OC1B) β Port D bit 4 / USART1 external clock / Timer1 output compare B PWM |
| Pin 27 | PD3 (INT1/TXD1) β Port D bit 3 / external interrupt 1 / USART1 transmit |
| Pin 28 | PD2 (INT0/RXD1) β Port D bit 2 / external interrupt 0 / USART1 receive |
| Pin 29 | PD1 (TXD0) β Port D bit 1 / USART0 transmit |
| Pin 30 | PD0 (RXD0) β Port D bit 0 / USART0 receive |
| Pin 31 | PE0 (XCK0/AIN0) β Port E bit 0 / USART0 external clock / analog comparator input 0 (alternate) |
| Pin 32 | PE1 (TXD0/AIN1) β Port E bit 1 / USART0 transmit (alternate) / analog comparator input 1 (alternate) |
| Pin 33 | PA0 (AD0) β Port A bit 0 / external memory address-data bus bit 0 |
| Pin 34 | PA1 (AD1) β Port A bit 1 / external memory address-data bus bit 1 |
| Pin 35 | PA2 (AD2) β Port A bit 2 / external memory address-data bus bit 2 |
| Pin 36 | PA3 (AD3) β Port A bit 3 / external memory address-data bus bit 3 |
| Pin 37 | TCK β JTAG test clock |
| Pin 38 | TMS β JTAG test mode select |
| Pin 39 | TDO β JTAG test data output |
| Pin 40 | TDI β JTAG test data input |
| Pin 41 | RESET β Reset input (active low); also used for SPI serial programming |
| Pin 42 | XTAL2 β Inverting oscillator amplifier output / external clock input |
| Pin 43 | XTAL1 β Inverting oscillator amplifier input |
| Pin 44 | AREF β Analog reference for ADC/analog comparator |
Typical Applications
ATMEGA162V-8AUR is suitable for 6 applications: Industrial Control Panels, Two-Channel Serial Communication Adapters, Battery-Powered Instrumentation, Legacy Embedded Design Maintenance, Motor Control and PWM Actuation, JTAG-Based Boundary-Scan Test Systems.
Industrial Control Panels
The ATMEGA162V-8AUR fits industrial control panels because its 35 I/O lines, four Timer/Counters with compare modes, and 5.5V-tolerant operating range handle relay banks, button matrices, and 5V sensor inputs directly. The external memory interface lets designers attach SRAM or memory-mapped LCD controllers when the panel grows beyond on-chip resources, something few 16KB-class MCUs offer. In a typical panel, the MCU scans inputs at a 1-8MHz CPU clock, drives PWM outputs for indicators or actuators, and reports status over RS-485 via one of its two USARTs. Its single-cycle AVR core delivers roughly 8 MIPS at 8MHz, giving predictable interrupt latency for deterministic sequencing.
Recommended
Two-Channel Serial Communication Adapters
With two independent USARTs, the ATMEGA162V-8AUR is a natural fit for protocol converters and gateways - for example bridging a device bus on UART1 to a logging or modem link on UART0. The 8MHz clock divides cleanly to standard baud rates with low error, and the 1KB SRAM buffers packet bursts that smaller AVRs cannot hold. The JTAG interface shortens firmware development on final hardware, and the 1.8V-5.5V range allows the same board to serve 3.3V and 5V buses with minimal redesign. Typical throughput at 8MHz provides ample headroom for concurrent 115200 baud links while servicing timer interrupts.
Recommended
Battery-Powered Instrumentation
The V-grade 1.8V-5.5V supply range is the key enabler for portable instruments: a two-cell alkaline stack or a single Li-ion cell through an LDO keeps the ATMEGA162V-8AUR in regulation across the discharge curve. Running at 1-2MHz keeps active current in the low-milliamp range, while power-down sleep drops consumption to microamps between measurements. The 512B EEPROM stores calibration constants through battery replacement, and the ADC reference pin (AREF) supports ratiometric sensor measurements. Peak 8MHz capability remains available for burst computation during a measurement cycle, letting one firmware image trade speed against energy dynamically.
Recommended
Legacy Embedded Design Maintenance
The ATmega162 exists largely to maintain and extend legacy designs that rely on the AVR external parallel bus. The ATMEGA162V-8AUR reproduces that external memory interface in an active, RoHS-compliant, tape-and-reel package, so obsolete-stock BOMs can be refreshed without PCB respin. Because it is pin-to-pin compatible with ATMEGA162-16AUR and ATMEGA162V-8AU in the same 44-TQFP footprint, procurement can substitute speed/voltage grades to match availability. The JTAG port also lets service teams re-flash and boundary-scan-test deployed boards, and SPI ISP supports field updates with just MISO/MOSI/SCK/RESET access pads.
Recommended
Motor Control and PWM Actuation
Four Timer/Counters with compare modes generate multiple independent PWM channels for DC motor drives, servo positioning, and backlight dimming. At 8MHz, an 8-bit PWM achieves about 31kHz - above audible range - while 16-bit Timer1 delivers fine resolution for slow, precise actuator sweeps. Input Capture (ICP1 on PD6) timestamps encoder or echo pulses with timer-clock resolution, and external interrupts INT0/INT1 on PD2/PD3 respond to limit switches. The 1.8V-5.5V range lets a single firmware serve both 3.3V logic MOSFET drivers and legacy 5V gate drivers, reducing qualification effort across product variants.
Recommended
JTAG-Based Boundary-Scan Test Systems
Manufacturing test lines benefit from the ATMEGA162V-8AUR's JTAG interface, which supports Boundary-scan in addition to on-chip debug and programming. A single 4-pin TAP (TCK, TMS, TDI, TDO on TQFP pins 37-40) verifies board-level interconnect of JTAG devices, flash-firmware during production, and later retriggers in-field diagnostics. The 44-TQFP (10x10 mm) footprint gives generous 0.8mm pitch for bed-of-nails or flying-probe access to all 35 I/O lines. Because R-suffix tape-and-reel packaging suits high-volume SMT lines, test coverage scales with production volume without changing the BOM.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA162V-8AUR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA162V-8AU | ATMEGA162-16AUR | ATMEGA162V-1AUR | ATMEGA16-16AU |
|---|---|---|---|---|---|
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Frequency | 8 MHz | 8 MHz | 16 MHz | 1 MHz | 16 MHz |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 4.5 V to 5.5 V | 1.8 V to 5.5 V | 4.5 V to 5.5 V |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| External Memory Interface | Yes | Yes | Yes | Yes | No |
| Packaging Method | Tape & Reel | Tray | Tape & Reel | Tape & Reel | Tray |
| Parametric Match | reference part | 100% | 80% | 80% | 70% |
Key Differentiators
- External memory interface in a 16KB-class MCU (vs ATMEGA16-16AU)
- Wide 1.8V-5.5V supply range (vs ATMEGA162-16AUR)
- Two independent USARTs (vs ATMEGA16-16AU)
Design Notes
The ATMEGA162V-8AUR is specified from 1.8V to 5.5V, but the maximum safe operating frequency decreases at low supply per the Microchip frequency-versus-voltage curve. Below about 2.7V, keep the system clock well under the 8MHz maximum; consult the ATmega162 datasheet speed-grade table before fixing the crystal. Decouple VCC (pin 14) and AREF (pin 44) with 100nF ceramic capacitors placed within 5mm of the pins, and add 10uF bulk capacitance at the board supply entry. Estimated: at 5V and 8MHz with typical loads, active current is in the low tens of milliamps, so plan regulator headroom accordingly.
The 44-TQFP (10x10 mm) has 0.8mm pitch leads - use a standard TQFP-44 land pattern per IPC-SM-782 geometry and add thermal relief vias near pin 13 (GND). Keep the XTAL1/XTAL2 crystal traces (pins 43/42) short, under 10mm, and surround them with a ground guard to avoid startup problems and stray oscillation. Route the SPI ISP lines (PB5/PB6/PB7) to a 2x3 programming header with series 100-ohm resistors if the same pins drive heavy loads, so in-system programming remains reliable on assembled boards.
Three frequent mistakes with ATmega162 designs: (1) leaving the JTAG interface enabled (factory default) without accounting for PC7-PC4 being taken over by JTAG - disable JTAG via fuse or the JTD bit if those pins are needed for external memory address lines; (2) using ATMEGA162-16AUR as a substitute on a 3.3V board - that grade requires 4.5V-5.5V, unlike this V-grade part; (3) forgetting the external memory interface requires configuring the XMEM fuse/register before Port A/C act as the bus. Verify each against the Microchip ATmega162 datasheet during design review.
Compliance Information
RoHS compliance stated in LCSC listing (C220231). No AEC-Q100 automotive qualification data found in provided sources; standard commercial/industrial grade part.
