ATTINY2313A-SU - 20MHz 8-bit AVR MCU, 2KB Flash | Microchip
MPN: ATTINY2313A-SU ✓ Hoạt độngATTINY2313A-SU Tóm tắt
An 8-bit microcontroller (MCU) is a small computing system-on-chip integrating a CPU core, program and data memory, and programmable I/O peripherals on a single die. The AVR RISC architecture used in the ATtiny2313A family is a Harvard-variant 8-bit core whose instruction set was designed for single-cycle execution and a uniform 16-bit instruction word, giving it a strong code-density and deterministic interrupt latency versus accumulator-based legacy 8-bit cores such as the 8051. The 'picoPower' designation refers to Microchip's family of ultra-low-power AVR devices with sub-microamp sleep currents and multiple software-controlled power-reduction modes.
Key features of the ATTINY2313A-SU include two flexible Timer/Counter peripherals with compare and PWM modes, a full-duplex hardware USART for asynchronous serial communication, a Universal Serial Interface (USI) supporting SPI and TWI (I2C), a single-wire debugWIRE on-chip debug interface, an internal calibrated RC oscillator, and an internal analog comparator. It also supports 12 interrupt sources, an enhanced watchdog timer with separate on-chip oscillator, and an interrupt-on-pin-change capability across all I/O lines. The 20-MHz maximum clock and 2KB ISP Flash (endurance >=10,000 write/erase cycles per Microchip datasheet) enable it to replace legacy discrete logic in compact embedded designs.
Architecturally, the ATtiny2313A uses a 32 x 8-bit general-purpose working register file directly connected to the ALU, allowing two independent registers to be accessed in one cycle. The program memory is organized as 1K x 16 bits (Flash) and the device includes a true Read-While-Write self-programming mechanism via the on-chip boot block, which simplifies in-field firmware updates. The USART supports both asynchronous and synchronous modes with fractional baud-rate generator, and the USI module can act as SPI master/slave or TWI master/slave.
Typical applications include USB-to-serial bridge replacements, IR remote control transmitters and receivers, consumer appliance controllers, simple sensor hubs, LED lighting controllers, and compact logic-replacement subsystems. The wide voltage range and low-power sleep modes also make it attractive for battery-driven products such as wireless sensor nodes, smart locks, and wearables.
When designing with this part, choose the internal calibrated RC oscillator for cost- and pin-sensitive designs, or add an external crystal on PB4/XTAL1 and PB5/XTAL2 when frequency accuracy matters. Decouple VCC (pins 1 and 19) with a 100nF ceramic capacitor placed within a few millimeters of the supply pins, and keep ISP programming traces short to avoid disrupting the debugWIRE interface during bring-up.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet, including explicit guidance on choosing ATtiny2313A-SU versus the pin-compatible ATtiny4313-SU and ATTINY2313A-PU DIP-package variant.
Bộ thay thế dễ dàng lắp đặt cho ATTINY2313A-SU — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
ATTINY4313-SU
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATTINY2313A-PU
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATTINY2313A-SUR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATTINY2313-20SU
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATTINY2313A-SU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATTINY2313A-SU Tỷ lệ tối đa & tính chất điện
| Core Architecture | AVR 8-bit RISC |
| Tần số xung maksimum | 20 MHz |
| Program Memory (Flash) | 2 KB (1K x 16) |
| EEPROM | 128 B |
| SRAM | 128 B |
| General-Purpose I/O Lines | 18 |
| General-Purpose Working Registers | 32 |
| Operating Voltage Range | 1.8 V to 5.5 V |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C |
| Supply Voltage - Min | 2.5 V |
| Supply Voltage - Max | 5.5 V |
| Timer/Counters | 2 (8-bit and 16-bit, with compare/PWM modes) |
| USART | 1 hardware USART |
| Serial Interfaces | USART, USI (SPI / TWI), debugWIRE |
| Interrupt Sources | 12 |
| Watchdog Timer | Yes, enhanced, separate on-chip oscillator |
| Internal Oscillator | Calibrated RC, configurable |
| Analog Comparator | Yes (on-chip) |
| Hộp | 20-pin SOIC (wide-body, 300 mil) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | MSL 1 (per Microchip product page) |
| Trạng thái RoHS | Compliant |
| Lead-Free / Halogen-Free | Yes / Yes |
| AEC-Q100 Automotive Qualification | Not qualified |
Cấu hình chân ATTINY2313A-SU
| Chân 1 | VCC — Power supply input (1.8V to 5.5V) |
| Chân 2 | PA0 — Port A bit 0 (MOSI / AREF) |
| Chân 3 | PA1 — Port A bit 1 (MISO) |
| Chân 4 | PA2 — Port A bit 2 (OC0A / AIN0) |
| Chân 5 | GND — Ground reference |
| Chân 6 | PD0 — Port D bit 0 (RXD / INT0) |
| Chân 7 | PD1 — Port D bit 1 (TXD / T0 / INT1) |
| Chân 8 | PD2 — Port D bit 2 (AIN0 / OC0B) |
| Chân 9 | PD3 — Port D bit 3 (OC1A / INT1) |
| Chân 10 | GND — Ground reference |
| Chân 11 | PD4 — Port D bit 4 (T0 / IC1) |
| Chân 12 | PD5 — Port D bit 5 (OC1B / T1) |
| Chân 13 | PD6 — Port D bit 6 (ICP / OC1D) |
| Chân 14 | PB0 — Port B bit 0 (MOSI / DI / SDA) |
| Chân 15 | PB1 — Port B bit 1 (MISO / DO) |
| Chân 16 | PB2 — Port B bit 2 (SCK / USCK / SCL) |
| Chân 17 | PB3 — Port B bit 3 (XTAL1 / CLKI / OC1D) |
| Chân 18 | PB4 — Port B bit 4 (XTAL2 / CLKO) |
| Chân 19 | VCC — Power supply input (1.8V to 5.5V) |
| Chân 20 | RESET/dW — Reset input / debugWIRE debug interface |
Ứng dụng tiêu biểu
ATTINY2313A-SU phù hợp cho 7 Áp dụngs: USB-to-Serial Bridge Companion, IR Remote Control Transmitter/Receiver, Consumer Appliance Controller, LED Lighting Controller, Compact Sensor Hub Node, Logic Replacement / Glue Controller, Battery-Powered Wearable Controller.
USB-to-Serial Bridge Companion
The ATTINY2313A-SU is widely used as the firmware host in low-cost USB-to-UART bridges and CDC-class adapters. Its hardware USART with fractional baud-rate generator handles full-duplex 115,200 baud links to CH340/CP2102/FT232 hosts without software emulation. At 20 MHz it delivers 20 MIPS, easily handling USB request parsing, line-coding, and flow-control state machines in 2 KB of Flash. The 1.8V-5.5V VCC range lets it interface directly to 3.3V MCUs and 5V legacy UARTs without level shifters. Place a 100 nF decoupling cap within 5 mm of pins 1 and 19 and route the USART TX/RX traces as a matched differential pair for EMI control.
Được đề xuất
IR Remote Control Transmitter/Receiver
The ATTINY2313A-SU's 18 GPIO, hardware interrupt-on-pin-change, and 16-bit Timer/Counter1 with PWM make it a strong fit for IR remote transmitters and receivers. The interrupt-on-pin-change allows direct keypad-matrix scanning without glue logic, while Timer1 generates the 38 kHz/56 kHz carrier PWM for RC5/RC6/SIRC protocols at duty cycles below 50%. The internal RC oscillator is accurate enough for consumer-IR carrier generation. The 128 B SRAM is sufficient for protocol frame buffering and a 32-entry decode table. For battery remotes, the Power-Down mode with watchdog-disabled drops current below 1 uA, extending coin-cell life.
Được đề xuất
Consumer Appliance Controller
The ATTINY2313A-SU is a long-time workhorse for white-goods and small-appliance control boards, where it replaces discrete 555/4017 logic with a single 20-pin chip. Its USART enables factory calibration and in-field firmware updates, while the USI module handles SPI EEPROM/display or TWI sensor expansion. With a 5V supply and -40 C to +85 C industrial temperature range, it survives the under-cabinet and behind-panel thermal environments of microwave ovens, washing machines, and HVAC controllers. The hardware watchdog timer with separate on-chip oscillator provides fail-safe recovery in noisy motor environments.
Được đề xuất
LED Lighting Controller
The ATTINY2313A-SU drives low-to-medium-density LED strings, addressable pixels (WS2811/WS2812), and PWM-dimmed indicator clusters from a single chip. Timer/Counter0 and Timer/Counter1 generate up to four PWM channels for RGBW color mixing, and the 20 MHz clock supports 800 kbps WS2812 bit-banging without DMA. The wide 1.8V-5.5V VCC range lets a single device drive both 3.3V logic-level LEDs and 5V analog strips. Internal comparator enables direct current sensing for closed-loop LED drivers. Designers typically pair it with a 100 nF supply bypass and a 10 uF bulk cap on the 5V rail for PWM transient handling.
Được đề xuất
Compact Sensor Hub Node
The ATTINY2313A-SU serves as a low-cost I2C/SPI sensor aggregator in IoT edge nodes where a larger MCU is overkill. The USI master handles TWI communication with temperature, humidity, and motion sensors, while the USART bridges aggregated telemetry to a parent MCU or radio. With picoPower Power-Down at sub-1 uA, it spends most of its time sleeping and wakes on interrupt-on-pin-change to take measurements. Its 18 GPIO is sufficient for a 4x4 keypad matrix, a status LED bank, and two interrupt-capable sensor lines, all without external glue logic.
Được đề xuất
Logic Replacement / Glue Controller
The ATTINY2313A-SU replaces legacy 74HC-series glue logic in designs that need a handful of state-machine behaviors rather than combinational gates. A 2 KB Flash state machine can replace dozens of discrete logic ICs on a legacy motherboard, reducing board area and BOM count. The 18 GPIO lines offer bidirectional buffering with programmable pull-ups, internal timers replace 555-based monostables, and the USART acts as a built-in debug port. With an industrial -40 C to +85 C range, it slots into legacy industrial controller retrofit boards where the original discrete logic has gone EOL.
Được đề xuất
Battery-Powered Wearable Controller
The ATTINY2313A-SU fits inside coin-cell-powered wearables where board space is tight and current budget is in single-digit microamps average. Its picoPower Power-Down mode draws <1 uA with watchdog disabled, and Power-Save mode retains Timer2 running for periodic wake-ups. The 1.8V VCC floor allows direct operation from a single CR2032 cell through most of its discharge curve. The 18 GPIO drives haptic drivers, RGB indicator LEDs, and a small SPI OLED display via the USI module. The internal 8 MHz calibrated RC oscillator eliminates the need for an external crystal, saving two pins and board space.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATTINY2313A-SU — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | ATTINY4313-SU | ATTINY2313A-PU | ATTINY2313A-SUR | ATTINY2313-20SU |
|---|---|---|---|---|---|
| Package | SOIC-20 (wide-body) | SOIC-20 - same | PDIP-20 (NOT same footprint) | SOIC-20 - same | SOIC-20 - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash | 2 KB | 4 KB | 2 KB | 2 KB | 2 KB |
| SRAM | 128 B | 256 B | 128 B | 128 B | 128 B |
| EEPROM | 128 B | 256 B | 128 B | 128 B | 128 B |
| Max Clock | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| GPIO | 18 | 18 | 18 | 18 | 18 |
| Operating Voltage | 1.8V to 5.5V | 1.8V to 5.5V | 1.8V to 5.5V | 1.8V to 5.5V | 2.7V to 5.5V |
Bảo phân biệt quan trọng
- Smallest Microchip 8-bit AVR MCU with hardware USART and 18 GPIO in SOIC-20 (vsATTINY212-SSN)
- 2x memory headroom over ATTINY2313A-SU without changing the PCB (vsATTINY4313-SU)
- Surface-mount production-friendly packaging (vsATTINY2313A-PU)
Ghi chú thiết kế
Decouple VCC (pins 1 and 19) with a 100 nF X7R ceramic capacitor placed within 5 mm of the supply pins; add a 10 uF bulk cap on the same rail if the design drives heavy PWM loads or shares the supply with motors. For battery applications, route both VCC pins to a star point and use separate ground traces back to pin 5/10 GND to keep digital switching currents out of the analog supply path.
ATTINY2313A-SU pins 5 and 10 are both GND - leaving pin 10 floating causes erratic I/O behavior on Port D because the digital ground return is incomplete. Always tie both GND pins to the board ground plane. The RESET pin (20) is also the debugWIRE pin; connect it through a 4.7 kohm pull-up to VCC per Microchip AVR042 recommendations and avoid long traces, which form an antenna that picks up HV programming signals.
If the design uses an external crystal on PB4/XTAL2 and PB3/XTAL1, route the crystal traces symmetrically with at least 0.5 mm clearance to other signals and add a guard ring tied to GND to keep oscillator harmonics from coupling into the ADC or analog comparator. For designs using only the internal RC oscillator, leave PB3/PB4 as general-purpose GPIO; programming the CKSEL fuses to 'Internal 8 MHz' avoids accidentally enabling an external crystal and saves two PCB traces.
The USART pins (PD0/RXD, PD1/TXD) should be routed away from PWM outputs (PD3/PD5/PD6) to avoid switching-noise coupling into the serial link. Keep the ISP programming header within 50 mm of the MCU and follow the 6-pin AVR ISP pinout so the same header works for both production programming and field updates via debugWIRE.
Thông tin tuân thủ
RoHS compliant per Microchip product page (as of 2026-10-07). Lead-free and halogen-free. Not AEC-Q100 qualified - not recommended for new automotive designs; use ATtiny automotive variants instead.
