ATTINY167-AXD - 8-bit AVR MCU, 16KB Flash, 20MHz, TSSOP-20 | Microchip
MPN： ATTINY167-AXD ✓ 啟用中ATTINY167-AXD 概覽
An 8-bit microcontroller (MCU) is a compact processor that integrates a CPU core, non-volatile program memory, volatile data memory, and peripheral interfaces on a single silicon die. The AVR family uses a modified Harvard architecture with single-cycle instruction execution, making 8-bit MCUs well suited for deterministic, low-power, real-time control tasks. Within the broader semiconductor taxonomy, MCUs belong to the embedded processor category, with 8-bit parts occupying the low-power, cost-sensitive end versus 16-bit and 32-bit MCUs that target higher computational throughput. The ATTINY167-AXD specifically adds automotive bus (LIN) and USB connectivity, a combination rarely found in 8-bit parts, while remaining in a small TSSOP-20 footprint.
Key features include 16KB flash (8K x 16 words), 512B EEPROM for non-volatile data, 512B SRAM, hardware LIN 2.0 controller, USB 2.0 full-speed device, 10-bit ADC with up to 11 channels, 8-bit and 16-bit timers with PWM, an enhanced universal serial interface (USI), and a programmable watchdog timer with separate on-chip oscillator. The MCU operates from 1.8V to 5.5V across -40C to +125C (automotive grade), and supports in-system programming via SPI or USB, enabling field firmware upgrades without desoldering.
The device uses Microchip's enhanced AVR RISC core executing instructions in a single clock cycle, achieving up to 20 MIPS throughput at 20 MHz. Hardware LIN handling offloads bit timing and checksum generation from the CPU, freeing cycles for application logic. The integrated USB transceiver and dedicated 3.3V regulator simplify USB device designs by eliminating external PHY or LDO components. The TSSOP-20 package balances IO count with a 6.5mm x 4.4mm board footprint, smaller than the SOIC-20 alternative.
Typical applications include automotive LIN slave nodes (body controllers, seat modules, mirror controllers, sensor clusters), USB human-interface devices (HID mice, keyboards, custom peripherals), industrial sensor transmitters, and low-cost consumer devices requiring automotive temperature tolerance. The wide operating voltage and temperature range also make it suitable for harsh-environment IoT edge nodes.
When designing with this device, prioritize decoupling: place a 100nF ceramic capacitor on each VCC pin within 2mm of the pad, and add a 10uF bulk capacitor near the USB VBUS line. For LIN applications, route the LIN line as a differential pair with the bus pull-up, and add TVS protection such as the NUP2105L. Always configure the fuses for the intended clock source (internal 8 MHz RC vs external crystal) before USB enumeration.
This page synthesizes distributor pricing, drop-in compatible alternatives within the TSSOP-20 footprint, and practical automotive design notes not collected on a single manufacturer datasheet page.
直接替換替代品，適用於 ATTINY167-AXD — 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： ATTINY167-AXD （相同外形與佔位） — 差異在於 EEPROM, Package, SRAM, ADC, Communication.
ATTINY87-AXD
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ATTINY167-AXU
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ATTINY167-MU
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATTINY461A-XU
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ATTINY1624-SSU
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATTINY261A-PU
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ATTINY167-AXD 最大額定值與電氣特性
| Core Architecture | 8-bit AVR enhanced RISC |
| Program Memory (Flash) | 16 KB (8K x 16) |
| EEPROM | 512 B |
| SRAM | 512 B |
| Maximum CPU Speed | 20 MHz |
| Operating Voltage | 1.8 V to 5.5 V |
| 工作溫度 | -40 C to +125 C (automotive) |
| GPIO Pins | 16 |
| ADC | 10-bit, up to 11 channels |
| Timer/Counters | 1x 8-bit, 1x 16-bit |
| PWM Channels | Up to 4 (hardware) |
| Communication | LIN 2.0 controller, USB 2.0 FS device, USI (SPI/I2C), UART |
| Watchdog Timer | Programmable with separate on-chip oscillator |
| 封裝 | TSSOP-20 |
| 安裝類型 | Surface Mount |
| MSL 等級 | 1 |
| RoHS 狀態 | Compliant |
| Programming Interface | ISP (SPI), USB bootloader |
ATTINY167-AXD 腳位配置
| 腳位 1 | VCC — Power supply |
| 腳位 2 | PC0 — General purpose I/O / ADC0 |
| 腳位 3 | PC1 — General purpose I/O / ADC1 |
| 腳位 4 | PC2 — General purpose I/O / ADC2 |
| 腳位 5 | PC3 — General purpose I/O / ADC3 |
| 腳位 6 | PC4 — General purpose I/O / ADC4 |
| 腳位 7 | PC5 — General purpose I/O / ADC5 |
| 腳位 8 | GND — Ground |
| 腳位 9 | PC6 — General purpose I/O / ADC6 / RESET |
| 腳位 10 | PD0 — General purpose I/O / RXD |
| 腳位 11 | PD1 — General purpose I/O / TXD |
| 腳位 12 | PD2 — General purpose I/O / INT0 |
| 腳位 13 | PD3 — General purpose I/O / INT1 |
| 腳位 14 | PD4 — General purpose I/O / T0 |
| 腳位 15 | PD5 — General purpose I/O / T1 |
| 腳位 16 | PD6 — General purpose I/O / OC1B |
| 腳位 17 | PB0 — General purpose I/O / MOSI |
| 腳位 18 | PB1 — General purpose I/O / MISO |
| 腳位 19 | PB2 — General purpose I/O / SCK |
| 腳位 20 | PB3 — General purpose I/O / LIN / OC1A |
典型應用
ATTINY167-AXD 適用於 6 應用s: Automotive LIN Slave Node, USB Human Interface Device, Industrial Sensor Transmitter, Automotive Body Control Module, USB-to-LIN Bridge Adapter, Low-Cost Consumer IoT Edge Node.
Automotive LIN Slave Node
The ATTINY167-AXD is purpose-built for LIN 2.0 slave nodes in automotive body electronics. Its integrated hardware LIN controller offloads bit timing, break generation, and checksum computation from the CPU, freeing cycles for application logic such as mirror positioning, seat control, or sensor aggregation. The automotive -40C to +125C grade and 2 kV HBM ESD rating meet the electrical stress typical of 12V automotive battery environments.
推薦
USB Human Interface Device
The ATTINY167-AXD's integrated USB 2.0 full-speed device with on-chip transceiver and 3.3V regulator makes it a strong fit for low-cost USB HID peripherals such as mice, keyboards, presentation clickers, and custom input devices. The internal 48 MHz PLL eliminates the external crystal typically required for USB, reducing BOM cost by $0.30 or more while keeping the design in a compact TSSOP-20 footprint.
推薦
Industrial Sensor Transmitter
Industrial 4-20 mA loop-powered or RS-485 sensor transmitters benefit from the ATTINY167-AXD's wide 1.8V to 5.5V supply range and -40C to +125C operating temperature. The 10-bit ADC with 11 channels handles thermistor, RTD, and pressure-sensor signal conditioning. The hardware UART supports Modbus RTU or proprietary RS-485 protocols with deterministic latency, and 512 B of EEPROM stores calibration data with 100k endurance.
推薦
Automotive Body Control Module
Body control modules consolidate multiple LIN sub-nodes for door locks, window lifters, and lighting. The ATTINY167-AXD serves as a master node controlling slave modules via its LIN controller while monitoring switch inputs through the 10-bit ADC. The 16 GPIO and 16 MHz performance handle debouncing, LED PWM dimming, and LIN scheduling in a single MCU, replacing two or more 8-bit parts in legacy designs.
推薦
USB-to-LIN Bridge Adapter
Diagnostic tools and engineering bridges that connect a PC's USB port to a vehicle's LIN bus are a natural fit for the ATTINY167-AXD. The chip's USB device enumerates as a virtual COM port (CDC class) while the LIN controller handles bus arbitration and timing. This single-chip implementation replaces an external LIN transceiver plus USB-to-UART bridge, fitting inside a small OBD-II dongle enclosure.
推薦
Low-Cost Consumer IoT Edge Node
Battery-powered consumer IoT edge nodes such as remote controls, smart sensors, and wearables use the ATTINY167-AXD for its low-power sleep modes and integrated USB for charging or firmware update. The 1.8V minimum supply allows direct connection to single-cell Li-ion or 2x AA batteries, while the 512 B SRAM and 16 KB flash comfortably support BLE-friendly sensor pre-processing or Zigbee host-bridge firmware.
推薦
推薦產品摘要
工程參考資料，適用於 ATTINY167-AXD — 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 | ATTINY87-AXD | ATTINY167-AXU | ATTINY461A-XU | ATTINY1624-SSU |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TSSOP-20 | TSSOP-20 - same | TSSOP-20 - same | TSSOP-20 - same | TSSOP-20 - same |
| Flash Memory | 16 KB | 8 KB (-50%) | 16 KB (same) | 4 KB (-75%) | 16 KB (same) |
| EEPROM | 512 B | 512 B (same) | 512 B (same) | 256 B (-50%) | 256 B (-50%) |
| Max Clock Speed | 20 MHz | 20 MHz (same) | 20 MHz (same) | 20 MHz (same) | 20 MHz (same) |
| Hardware LIN | Yes (LIN 2.0) | Yes | Yes | No | No |
| USB 2.0 FS | Yes (integrated) | Yes | Yes | No | Yes (USB 2.0 FS) |
| Temperature Grade | Automotive (-40C to +125C) | Automotive | Industrial (-40C to +85C) | Industrial | Industrial |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 10-bit | 12-bit (upgrade) |
| GPIO Count | 16 | 16 | 16 | 16 | 18 (more) |
主要差異化特點
- Integrated hardware LIN 2.0 controller with master/slave capability (對比ATTINY461A-XU)
- 16 KB flash versus smaller ATtiny variants (對比ATTINY87-AXD)
- Automotive -40C to +125C qualification with 2 kV HBM ESD (對比ATTINY1624-SSU)
- Integrated USB 2.0 FS with on-chip 48 MHz PLL (對比ATTINY461A-XU)
設計說明
Place a 100 nF X7R ceramic decoupling capacitor within 2 mm of each VCC pin (pin 1 and pin 8 / GND). Add a 10 uF bulk capacitor at the PCB power entry. For USB applications, the on-chip 3.3 V regulator requires an external 4.7 uF capacitor on the UVCC pin; the datasheet recommends X5R/X7R ceramic with <100 mOhm ESR. For battery-powered designs, the ATTINY167-AXD consumes 1.5 mA active at 3V/16 MHz and drops to under 1 uA in power-down, allowing coin-cell operation with duty-cycled firmware.
Route the USB D+/D- lines as a 90-ohm differential pair with length matching within 1 mm. Keep traces short (under 50 mm) and avoid routing near switching converters or RF traces. The reset line should have a 10 kOhm pull-up and a 1 nF capacitor to ground for noise filtering; do not leave the RESET pin floating in automotive environments where 12V load-dump transients can corrupt program flow.
Do not confuse the AXD suffix (TSSOP-20, automotive grade) with the AXU suffix (TSSOP-20, industrial grade) or MU suffix (QFN package, automotive). The pinout differs between TSSOP-20 and QFN variants. For LIN designs, always set the CLKPS fuse to use the external crystal when multiple LIN nodes must synchronize timing; internal RC tolerance is too loose for time-critical LIN 2.0 master scheduling. Estimated: internal RC accuracy is +/- 2% over temperature, versus +/- 0.5% for the crystal option.
In TSSOP-20, the theta_JA is approximately 90 C/W on a 4-layer JEDEC test board. Estimated: at maximum active current of 10 mA at 5V, self-heating is below 5 C and thermal shutdown is unreachable. In enclosed automotive housings above 85 C ambient, verify that the brown-out detector is configured to 4.3V or lower to avoid spurious resets on supply sag.
For LIN bus applications, add an external TVS such as NUP2105L across LIN and GND to absorb 12V load-dump and jump-start transients. The internal LIN driver is rated for -27 V to +40 V load-dump survival, but TVS protection extends ESD immunity from 2 kV HBM to 8 kV IEC 61000-4-2 contact discharge. Estimated: external TVS adds 0.5 nF bus capacitance, well within LIN spec limits.
合規資訊
Automotive grade with AEC-Q100 qualification. RoHS and REACH compliant per Microchip product page. Lead-free and halogen-free per package datasheet.
