ATTINY12-8PU - 8-Bit 1KB Flash AVR MCU, 8MHz | Microchip
MPN： ATTINY12-8PU ✓ 啟用中ATTINY12-8PU 概覽
An 8-bit AVR microcontroller is a reduced-complexity processor within the broader semiconductor and embedded-controller hierarchy. The ATTINY12 combines an AVR RISC core, Flash program memory, EEPROM data memory, general-purpose I/O, and an internal oscillator in one device. Its PDIP package also provides through-hole compatibility for prototyping, educational assemblies, and repair applications where a surface-mount package would be inconvenient.
The ATTINY12-8PU provides 1KB of Flash memory organized as 512 x 16, 64 bytes of EEPROM, and 6 I/O ports. Its listed operating voltage range is 4V to 5.5V, with a maximum operating frequency of 8MHz. The device uses the AVR RISC architecture and is described as offering 90 powerful instructions with most instructions executing in a single clock cycle.
Typical use cases include small sensor nodes, simple timers, LED indicators, basic control loops, teaching examples, and dedicated appliance controllers. Because the device has only 1KB of Flash and 64 bytes of EEPROM, it is best suited to compact firmware with limited buffering, calibration storage, and peripheral integration. It should not be selected when the design requires extensive code space, high-resolution ADC conversion, or a large number of I/O pins.
The most important design consideration is supply-voltage margin. Operating from a nominal 5V rail requires the rail to remain within the stated 4V to 5.5V range, including transient and regulator tolerance. Designers should also account for the limited memory before adding libraries, and should confirm the exact pin function and startup behavior against the manufacturer datasheet when replacing a different DIP-8 device.
This page combines distributor availability, verified device parameters, same-package replacement guidance, and application-specific design notes. It is intended to help engineers identify whether the ATTINY12-8PU is suitable for a new design or whether a higher-memory ATtiny family member should be selected instead.
直接替換替代品，適用於 ATTINY12-8PU — 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： ATTINY12-8PU （相同外形與佔位） — 差異在於 Architecture, Flash Memory.
ATTINY12-8PC
✅ 直接替換📋 參考替代品（不在目錄中）
ATTINY12L-4SU
✅ 直接替換📋 參考替代品（不在目錄中）
ATTINY13A-PU
✅ 直接替換聯絡詢價
查看資料表 →ATTINY12-8PU 最大額定值與電氣特性
| Product Type | 8-bit AVR RISC microcontroller |
| Core Processor | AVR 8-bit RISC core |
| Maximum Clock Speed | 8 MHz |
| Flash Memory | 1 KB (512 x 16) |
| EEPROM Memory | 64 bytes |
| RAM Size | Not specified in verified data |
| I/O Ports | 6 |
| Supply Voltage Range | 4 V to 5.5 V |
| Internal Oscillator | Yes |
| Architecture | AVR RISC architecture |
| Instruction Set | 90 powerful instructions |
| Execution Characteristic | Most instructions execute in a single clock cycle |
| Package Type | 8-pin PDIP, 0.300 inch, 7.62 mm |
| 安裝類型 | Through-hole |
| Package Dimensions | 0.300 inch (7.62 mm) body width |
| AEC-Q100 Qualification | not_applicable |
| Peripherals | POR and WDT listed in verified distributor data |
ATTINY12-8PU 腳位配置
| 腳位 1 | PB1 — Bidirectional general-purpose I/O port B pin |
| 腳位 2 | PB2 — Bidirectional general-purpose I/O port B pin |
| 腳位 3 | PB3 — Bidirectional general-purpose I/O port B pin |
| 腳位 4 | GND — Ground supply connection |
| 腳位 5 | PB0 — Bidirectional general-purpose I/O port B pin |
| 腳位 6 | PB4 — Bidirectional general-purpose I/O port B pin |
| 腳位 7 | PB5 — Bidirectional general-purpose I/O port B pin |
| 腳位 8 | VCC — Positive supply voltage connection |
典型應用
ATTINY12-8PU 適用於 6 應用s: Simple LED and Indicator Controllers, Small Sensor Signal Conditioning, Battery-Operated Timer and Control Module, Teaching and Embedded-Control Prototypes, Appliance and Domestic Auxiliary Control, Compact Embedded Automation Module.
Simple LED and Indicator Controllers
The ATTINY12-8PU is well suited to compact indicator controllers because its six I/O ports can drive logic-level LEDs, relays through suitable driver circuitry, or status lamps while the 8MHz clock executes compact state-machine firmware. With only 1KB of Flash, the design must avoid large libraries, but simple debounce counters and sequencing routines are practical. The 4V-to-5.5V operating range fits a regulated 5V rail, and the PDIP package is convenient for prototypes and hand-assembled products.
推薦
Small Sensor Signal Conditioning
The ATTINY12-8PU can supervise simple resistive, switch, or contact-based sensors when the application requires limited filtering, thresholding, and digital output rather than an on-chip high-resolution converter. Its 6 I/O pins allow sensor inputs to be combined with indicator outputs, while 64 bytes of EEPROM can retain a small calibration or configuration value. Firmware must be sized carefully, and any analog measurement requirement should be verified against the full datasheet rather than inferred from the summarized distributor data.
推薦
Battery-Operated Timer and Control Module
For a simple timed appliance controller, the ATTINY12-8PU offers an 8MHz AVR core, six available I/O pins, and an internal oscillator in an inexpensive 8-pin PDIP package. The device can implement countdown logic, pulse generation, or basic actuator control without an external clock source. Because it operates from 4V to 5.5V, a regulated 5V rail or suitable boost stage is normally required, and current consumption should be evaluated against the system's battery budget using the manufacturer's power and sleep-mode characteristics.
推薦
Teaching and Embedded-Control Prototypes
The ATTINY12-8PU is effective for education and introductory embedded-control work because its 8-pin PDIP footprint is easy to mount on a breadboard or perfboard and the 1KB Flash limit encourages concise, inspectable firmware. The AVR RISC architecture and single-cycle execution of most instructions make instruction-level timing concepts accessible, while six I/O ports are sufficient for switches, LEDs, and basic experiments. For advanced projects requiring serial protocols, more memory, or dense mixed-signal acquisition, students should move to a higher-resource AVR or site-listed Microchip controller.
推薦
Appliance and Domestic Auxiliary Control
The ATTINY12-8PU can serve as a dedicated auxiliary controller in appliances where a small deterministic control loop handles push buttons, relays, heaters, or indicators. Its AVR core provides straightforward firmware execution, while the 6 I/O ports allow direct interfacing to discrete sensors and driver transistors. Designers must add suitable transistor or MOSFET drive stages rather than driving loads directly from the MCU. The 1KB Flash and 64-byte EEPROM constraints favor a narrowly defined state machine rather than a feature-rich control platform.
推薦
Compact Embedded Automation Module
For a compact automation or interlock module, the ATTINY12-8PU can monitor a small number of discrete inputs and drive control outputs through external driver circuitry. Its six I/O ports and 8MHz clock are adequate for debouncing, interlock sequencing, and pulse outputs, while the PDIP package supports through-hole assembly and field replacement. The design should include fail-safe defaults, input conditioning, and transistor drivers because the microcontroller pins are not intended to switch inductive or high-current loads directly.
推薦
推薦產品摘要
工程參考資料，適用於 ATTINY12-8PU — 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 | ATTINY12-8PC | ATTINY12L-4SU | ATTINY13A-PU |
|---|---|---|---|---|
| Package | 8-pin PDIP, 0.300 inch, 7.62 mm | 8-pin PDIP - same mechanical format | 8-pin PDIP - same mechanical format | 8-pin PDIP - same mechanical format |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Architecture | 8-bit AVR RISC | AVR RISC | AVR RISC | AVR family |
主要差異化特點
- Closest identified same-package option retains the core memory and speed configuration (對比ATTINY12-8PC)
- Maintains a through-hole 8-pin DIP footprint for prototype and repair compatibility (對比ATTINY12-8SI)
- Provides the higher 8MHz clock option within the identified PDIP comparison set (對比ATTINY12L-4SU)
- Combines minimal flash usage with a conventional dual-in-line through-hole package (對比ATMEGA328P-ANR)
設計說明
Design the power rail around the verified 4V to 5.5V operating range. A regulated 5V supply is appropriate, but its tolerance and transient behavior must keep the MCU voltage inside those limits at every operating condition. Do not power the device directly from a raw 9V battery or an unregulated 12V rail. If the supply can fall below 4V, add suitable regulation or a supervisor; if it can exceed 5.5V, select another regulator or series solution rather than relying on the internal protection circuitry.
Treat the 1KB Flash and 64-byte EEPROM as hard design limits. Include compiler overhead, interrupt-vector space, library code, and bootloader requirements in the memory budget; the nominal Flash figure is not the complete application budget. Prefer short bit or byte-oriented state tables over large frameworks, and keep serial diagnostics and logging strings concise. For a new application that is likely to exceed 1KB, select a higher-memory ATtiny part before layout work begins.
Place the decoupling capacitor adjacent to the VCC and GND pins, follow the manufacturer layout guidance, and provide a low-impedance ground return. For the PDIP version, verify that the board's hole pattern matches the 0.300-inch, 7.62-mm body format and that the pin-1 orientation matches the PCB silkscreen. A DIP socket can simplify prototype replacement, but its mechanical clearance and soldering quality should be checked for vibration or repeated service applications.
Keep external clock and high-energy switching nodes away from the MCU supply and I/O traces. If an internal oscillator is used, validate timing accuracy over the intended temperature and supply range before relying on it for real-time functions. The DIP footprint exposes long leads, which can behave as small antennas in noisy environments; keep those leads short where possible with a socket only if signal margin is acceptable, and place protection networks near the connector or source of the transient.
合規資訊
The supplied web data identifies the device as active and describes the ATTINY12-8PC suffix as green and industrial-temperature, but it does not provide explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. No compliance claim has been inferred.
