ATMEGA162V-1AC - 16KB Flash AVR 8-Bit MCU | Microchip
MPN： ATMEGA162V-1AC ✓ 啟用中ATMEGA162V-1AC 概覽
An 8-bit microcontroller is a complete computing system on a single chip, integrating a processor core, program memory, data memory, and peripherals such as timers, serial interfaces, and general-purpose I/O. Within the power-management hierarchy of embedded design, MCUs like the ATmega162 occupy the mid-range AVR ATmega family, sitting above small AVR (ATtiny) parts and below the ATmega128-class devices.
Key features include the advanced AVR RISC architecture with 32 general-purpose working registers, an on-chip JTAG interface for boundary-scan and on-chip debugging, dual USARTs, an SPI interface, and an external bus interface (EBI/EMI) supporting up to 64KB of external memory. The JTAG debugger and dual UART connectivity make this part especially productive in systems that require both debuggability and multiple serial links.
Architecturally, the ATmega162 uses a Harvard-structure pipeline in which program and data memories are accessed separately, allowing most instructions to complete in one clock cycle. The enhanced RISC core pairs with in-system programmable Flash, enabling firmware updates on the assembled board through the SPI or JTAG port without removing the device.
Typical applications include industrial control panels, dual-communication-node embedded controllers, and legacy AVR board designs. The external memory interface suits data-logging systems, while the dual USARTs fit multi-drop serial networks and modem-linked devices.
A key design consideration is clock selection: the V-graded device supports lower supply operation, and the -1 speed grade constrains maximum clock frequency, so verify operating frequency against the actual supply voltage used.
This page adds distributor availability data, drop-in variant comparisons, pricing tiers, and practical design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 ATMEGA162V-1AC — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ATMEGA162V-1AC （相同外形與佔位） — 差異在於 Core Architecture, Package, JTAG Interface, Max Clock Frequency, Operating Voltage Range.
ATMEGA162-16AU
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA162V-8AU
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA162L-8AU
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ATMEGA162V-1AC 最大額定值與電氣特性
| Core Architecture | 8-bit AVR RISC |
| 資料匯流排寬度 | 8 Bit |
| Program Memory Size | 16KB (8K x 16) Flash |
| SRAM Size | 1KB |
| EEPROM Size | 512B |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Max Clock Frequency | 8 MHz |
| Instruction Set | 133 instructions, mostly single-cycle |
| Interfaces | EBI/EMI, SPI, UART/USART (dual), JTAG |
| On-Chip Debug | JTAG interface |
| Package Type | 44-TQFP (10x10 mm) |
| 安裝類型 | Surface Mount |
| Terminal Form | Gull Wing |
| Temperature Grade | Commercial |
| Lifecycle Stage | Active |
| Program Memory Type | In-System Programmable Flash |
| Throughput | Up to 1 MIPS per MHz |
ATMEGA162V-1AC 44-tqfp (10x10 mm) 腳位配置指南
ATMEGA162V-1AC（44-tqfp (10x10 mm) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： ATMEGA162V-1AC.
請參閱 資料表 以查看完整腳位配置。
典型應用
ATMEGA162V-1AC 適用於 6 應用s: Industrial Control Panels, Dual-Serial Communication Nodes, External Memory Data Loggers, Legacy ATmega161 Board Replacements, SPI-Based Peripheral Control, Embedded Instrumentation with JTAG Debug.
Industrial Control Panels
The ATMEGA162V-1AC fits industrial control panels where a rugged 8-bit controller must manage relays, keypads, and status indicators while tolerating wide supply variation. Its 2.7V to 5.5V operating range absorbs rail sag from long wiring runs, and the 16KB Flash holds ladder-style control firmware comfortably. The external bus interface can extend memory for recipe tables, and commercial temperature grading matches typical panel environments. With 1KB SRAM and 512B EEPROM, setpoints persist across power cycles without external nonvolatile devices, simplifying the bill of materials in cost-sensitive panel designs.
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Dual-Serial Communication Nodes
The ATMEGA162V-1AC is one of the few mid-range AVR parts with dual USARTs, making it a natural bridge node between two serial networks - for example a field bus on one UART and a modem or host link on the other. Per the Atmel datasheet, each USART supports synchronous and asynchronous modes with dedicated XCK pins, enabling flexible clocking. The 44-TQFP package provides enough I/O for flow-control and status lines. Its JTAG interface shortens firmware development for protocol stacks that must be iterated frequently during commissioning.
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External Memory Data Loggers
For data-logging systems that outgrow on-chip RAM, the ATMEGA162V-1AC provides an external bus interface (EBI/EMI) that addresses additional memory devices through its AD0-AD7 and A8-A15 multiplexed ports with ALE, RD, and WR strobes. According to the Atmel datasheet, up to 64KB of external memory is supported, giving ample buffer space for sampled data before writes to EEPROM or serial Flash. The 16KB internal Flash stores acquisition and compression code, while the 2.7V to 5.5V supply range suits loggers powered from batteries or scavenged supplies.
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Legacy ATmega161 Board Replacements
The ATMEGA162V-1AC is the recommended replacement path for boards designed around the ATmega161. The Atmel datasheet states the ATmega162 is 100% pin-compatible with ATmega161 and can replace it on existing PCBs without rework, preserving board investment on mature industrial products. Firmware requires review because fuse-bit locations and some electrical characteristics differ between the devices, but peripheral-rich features such as the JTAG debug port and enhanced timers improve the migrated design. The V-1AC grade additionally broadens the supply window compared with older 5V-only designs.
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SPI-Based Peripheral Control
The ATMEGA162V-1AC integrates an SPI interface with SS, SCK, MOSI, and MISO pins, suiting it as a master controller for ADCs, DACs, EEPROMs, and display drivers in compact instruments. Per the Atmel datasheet, SPI supports fast synchronous transfers, and the SPI port doubles as the In-System Programming interface, so the same four-wire header used for programming can service field firmware updates. Combined with the 2.7V to 5.5V supply range, the device can share a 3.3V SPI bus with modern peripheral ICs while running board logic at 5V.
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Embedded Instrumentation with JTAG Debug
Bench instruments, sensor conditioners, and test fixtures benefit from the ATMEGA162V-1AC's on-chip JTAG interface, which per the Microchip product page enables on-chip debugging and boundary-scan testing through a single connector. Developers can single-step firmware, watch registers, and reprogram the 16KB Flash without socketed parts, dramatically shortening bring-up cycles on low-volume instruments. The 8-bit AVR core delivers deterministic single-cycle execution for timing-critical measurement routines, and the 512B EEPROM stores calibration constants that survive power-off, keeping each instrument field-recalibratable.
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推薦產品摘要
工程參考資料，適用於 ATMEGA162V-1AC — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ATMEGA162-16AU | ATMEGA162V-8AU | ATMEGA162L-8AU |
|---|---|---|---|---|
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16KB (8K x 16) | 16KB (8K x 16) | 16KB (8K x 16) | 16KB (8K x 16) |
| SRAM | 1KB | 1KB | 1KB | 1KB |
| Supply Voltage | 2.7 V to 5.5 V | 4.5 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Max Clock Frequency | 8 MHz (V grade) | 16 MHz | 8 MHz | 8 MHz |
| JTAG On-Chip Debug | Yes | Yes | Yes | Yes |
| External Bus Interface | Yes (EBI/EMI) | Yes (EBI/EMI) | Yes (EBI/EMI) | Yes (EBI/EMI) |
主要差異化特點
- Widest supply window in the ATmega162 family (對比ATMEGA162-16AU)
- Full ATmega161 replacement path (對比ATMEGA162-16AU)
- Lower clock ceiling limits throughput (對比ATMEGA162-16AU)
設計說明
The ATMEGA162V-1AC accepts 2.7V to 5.5V, but AVR maximum clock frequency derates with supply voltage. The -1 speed grade further constrains frequency, and DigiKey lists the device speed as 1MHz while other sources cite the 8MHz V-grade ceiling. Verify the exact frequency-versus-voltage curve in the Atmel ATMEGA162V datasheet electrical characteristics section and set your crystal or oscillator accordingly. Decouple VCC with 0.1uF ceramic capacitors at both VCC pins plus bulk 10uF, and keep AREF clean when using the ADC-equivalent peripherals.
In the 44-TQFP layout, route the external bus interface (AD0-AD7 multiplexed bus with ALE latch) with matched lengths where possible and place the ALE latch (e.g., 74HC573) close to the MCU to minimize stubs on the shared address/data bus. Provide a 10k pull-up on RESET and expose the JTAG TCK/TMS/TDO/TDI pins (shared with port C) on a standard 2x5 header for on-chip debugging, per Atmel JTAG application guidance. Keep crystal traces under 10mm with ground guard.
When migrating from ATmega161, the Atmel datasheet warns that fuse-bit locations and some electrical characteristics differ on the ATmega162 - reprogramming with old fuse settings can lock out SPI programming. Also confirm the supply: using the standard ATMEGA162-16AU fuse/clock assumptions on this V-graded part at 3.3V can produce out-of-spec operation. Finally, the external memory interface requires enabling the XMEM fuse/configuration in software; leaving it disabled leaves the PA/PC ports as plain GPIO.
合規資訊
Compliance status was not stated in the provided verified web data; confirm RoHS/REACH status on the Microchip product page for ATMEGA162 or the distributor certificate of conformance.