ATMEGA169PA-MCHR - AVR 8-bit MCU 16KB LCD 64-QFN | Microchip
MPN: ATMEGA169PA-MCHR ✓ NakahandaATMEGA169PA-MCHR Ulas
A microcontroller unit (MCU) is a single-chip computer that integrates a processor core, memory, and peripherals into one package, sitting at the lowest level of the embedded-systems hierarchy (MCU -> embedded processor -> SoC). The ATmega family is Microchip's classic 8-bit AVR RISC line, executing most instructions in a single clock cycle with 32 general-purpose working registers. This part adds an on-chip segment LCD driver, a peripheral rare among modern 8-bit MCUs, which makes the ATmega169 sub-family a long-standing choice for battery-powered metering and display products.
Key features include the picoPower technology set for ultra-low sleep-mode consumption, read-while-write flash for in-system firmware updates, 54 general-purpose I/O lines, and a rich peripheral set with USART, SPI, two-wire interface (I2C), analog comparator, 10-bit ADC, and multiple power-saving idle and power-down modes. The -MCHR suffix denotes the 64-QFN (7x7 mm, exposed pad) package, tape-and-reel packing, and industrial temperature range.
Architecturally, the AVR core pairs a Harvard memory structure with single-cycle execution, and the picoPower options (power-down, power-save, standby) let firmware trade wake-up latency against nanoamp-level sleep current. The LCD driver drives multiplexed segment/glass configurations directly, removing an external LCD driver IC from the bill of materials.
Typical applications include battery-operated utility meters with LCD displays, handheld industrial instruments, thermostat and HVAC control panels, and consumer appliances requiring a segment display and long battery life.
Design consideration: the -PA picoPower variant is code-compatible with earlier ATmega169 parts, but sleep currents differ, so verify the power budget against the picoPower datasheet figures and decouple the 64-QFN exposed pad to ground for thermal and noise performance.
This page synthesizes distributor pricing, drop-in alternatives, design notes, and FAQ content not found in the manufacturer datasheet alone.
Mga alternatibo na pwedeng ilagay na ATMEGA169PA-MCHR — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok ATMEGA169PA-MCHR (parehas na form factor at footprint) — pagkakaiba sa Flash Memory, General Purpose I/O, EEPROM, SRAM, Core Processor.
ATMEGA169PA-MCH
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →ATMEGA169A-MCH
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
ATMEGA329P-MCHR
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
ATMEGA329PA-MCH
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
ATMEGA329P-MCH
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
ATMEGA169PA-MCHR Mga Pinakamataas na Rating at Electrical Characteristics
| Core Processor | AVR 8-bit RISC |
| Core Size | 8-bit |
| Maksimum na Taktiko ng Oras | 16 MHz |
| Flash Memory | 16 KB (8K x 16), ISP, read-while-write |
| EEPROM | 512 B |
| SRAM | 1 KB |
| General Purpose I/O | 54 lines (69 total pins incl. LCD segments) |
| Working Registers | 32 general purpose |
| LCD Controller | Integrated segment LCD driver |
| Low Power Technology | picoPower |
| Volte ng Pagbibigay | 2.5 V / 3.3 V / 5 V (per cross-reference data) |
| Packhaging | 64-QFN (7x7 mm) with exposed pad |
| Uri ng Pagpapasok | Surface Mount |
| Packaging | Tape & Reel (R suffix) |
| Communication Interfaces | USART, SPI, TWI (I2C) |
| Tindminan RoHS | Compliant |
Gabay sa Pin Configuration ng ATMEGA169PA-MCHR 64-qfn (7x7 mm) with exposed pad
Pin configuration para sa ATMEGA169PA-MCHR (64-qfn (7x7 mm) with exposed pad package). Kasama sa digital IC na ito ang GPIO, mga communication interface (UART, SPI, I2C), at mga power pin. Sumangguni sa datasheet ng manufacturer para sa mga alternatibong function ng pin at mga opsyon sa configuration. Mahalaga para sa disenyo ng embedded system at PCB layout.
Wala ng detalyadong pinout data na magagamit para sa ATMEGA169PA-MCHR.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
ATMEGA169PA-MCHR ay nararapat para sa 6 aplikasyons: Battery-Powered Utility Meters, Handheld Industrial Instruments, Thermostats and HVAC Control Panels, Consumer Appliance Panels, Security and Access Control Devices, IoT Sensor Nodes with Segment Display.
Battery-Powered Utility Meters
Utility meters (electricity, water, gas sub-meters) require a multiplexed segment LCD, long-life battery operation, and non-volatile storage of calibration data. The ATMEGA169PA-MCHR fits precisely: its integrated LCD driver drives the meter glass directly, its picoPower power-down and power-save modes extend battery life to multi-year service intervals, and the 512 B EEPROM stores metrology calibration constants across power loss. The 16 MHz AVR core executes most instructions in a single cycle, so a metering firmware loop can complete quickly and return the device to sleep. Placed with the LCD glass on SEG/SUP pins and a low-frequency 32 kHz watch crystal in power-save mode, the MCU keeps a real-time counter at minimal current while wake-up on demand handles measurement bursts over the USART or TWI interface.
Inirekomenda
Handheld Industrial Instruments
Handheld instruments such as panel meters, gauges, and portable testers benefit from the ATMEGA169PA-MCHR's combination of a segment display driver, 10-bit ADC input, and single-cycle 16 MHz RISC core. The LCD driver renders readings without a companion display controller, saving board area inside compact handheld enclosures, while the ADC digitizes sensor signals directly. PicoPower sleep modes conserve the battery pack between measurements, an essential trait for field tools used intermittently. The 54 general-purpose I/O lines support keypad scanning, relay or buzzer control, and serial communication to a PC or logger over the USART. Designers typically clock the part from an internal RC oscillator for cost savings and switch to the external 16 MHz crystal only for timing-critical measurement windows, balancing accuracy against power and component count.
Inirekomenda
Thermostats and HVAC Control Panels
Room thermostats and HVAC zone controllers pair a segment LCD with temperature sensing, setpoint keys, and relay or valve actuation - a workload well matched to the ATMEGA169PA-MCHR. The on-chip LCD driver displays temperature, mode, and schedule information; the EEPROM retains user schedules and calibration through power outages; and picoPower power-down keeps standby draw low in battery-powered wall units. The 16 KB flash accommodates full control firmware including PI loops for modulation valves, and the TWI interface connects external temperature or humidity sensors. In relay-driven designs, the MCU's timer PWM peripherals stage actuator transitions while the core stays mostly asleep. The exposed-pad 64-QFN grounds through a small thermal pour, adequate because an 8-bit MCU at typical control-loop duty cycles dissipates only milliwatts.
Inirekomenda
Consumer Appliance Panels
White-goods and small-appliance control panels frequently use segment LCDs for cycle status, time, and fault codes. The ATMEGA169PA-MCHR consolidates display driving, key scanning, buzzer control, and load switching into one 16 MHz AVR chip, reducing bill-of-materials count relative to a generic MCU plus LCD driver. Its 16 KB flash holds both the UI state machine and the appliance control logic, while the EEPROM logs fault history and usage counters. PicoPower standby modes support energy-label compliance targets by minimizing off-state consumption. Robust AVR I/O tolerates the noisy electromechanical environment of appliances, and the USART provides a factory test port. Layout practice: route LCD segment lines away from relay and triac drive traces on the display PCB to prevent ghost segments from capacitive coupling.
Inirekomenda
Security and Access Control Devices
Access keypads, door controllers, and small security panels need a compact MCU that drives a status display, scans a key matrix, and communicates with a central controller. The ATMEGA169PA-MCHR covers all three roles: its LCD driver shows entry prompts and alarms, its abundant GPIO handles the key matrix and LED indicators, and the USART or TWI links to RFID readers or panel backhauls. The 512 B EEPROM stores user codes and event counters securely through power cycles, and read-while-write flash allows field firmware updates without halting the display refresh. With a 16 MHz single-cycle core, scan-and-display loops complete in microseconds, so the part can idle in power-save between events. Battery-backed variants exploit picoPower modes to survive mains outage for days on a small cell.
Inirekomenda
IoT Sensor Nodes with Segment Display
Low-cost IoT sensor nodes that report a measured value locally on a segment LCD and upstream over a serial radio module fit the ATMEGA169PA-MCHR well. The MCU's picoPower sleep architecture dominates node lifetime: typical designs spend over 99 percent of time in power-down, waking on a timer or external interrupt to sample the sensor via the 10-bit ADC, update the LCD, and push data through the USART to a radio. The 16 KB flash stores the sampling stack plus lightweight protocol handling, and EEPROM keeps device identity and last-known calibration. Power budgeting practice: use the internal RC oscillator in sleep domains and the crystal only for the 16 MHz active bursts, and budget the LCD driver duty cycle since multiplexed glass drive is often the largest active-mode consumer after the radio.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for ATMEGA169PA-MCHR — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | ATMEGA169PA-MCH | ATMEGA169A-MCH | ATMEGA329P-MCHR |
|---|---|---|---|---|
| Package | 64-QFN (7x7 mm) | 64-QFN (7x7 mm) - same | 64-QFN (7x7 mm) - same | 64-QFN (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 16 KB | 16 KB | 32 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 2 KB |
| EEPROM | 512 B | 512 B | 512 B | 1 KB |
| picoPower Low Sleep Current | Yes | Yes | No (standard ATmega169A) | Yes |
| LCD Controller | Yes | Yes | Yes | Yes |
| Max Clock Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| Packing | Tape & Reel (R) | Tray / cut tape | Tray / cut tape | Tape & Reel |
Pangunahing mga Pagkakaiba
- picoPower sleep modes for lowest battery drain (kumpara saATMEGA169A-MCH)
- 16 KB flash at the lowest cost point of the LCD AVR family (kumpara saATMEGA329P-MCHR)
- Tape-and-reel packing for automated assembly (kumpara saATMEGA169PA-MCH)
Talaan ng Disenyo
For battery designs, exploit the picoPower modes explicitly: configure unused I/O as inputs with pull-ups or as outputs driven low before entering power-down, because floating pins increase leakage. Use the 32 kHz watch crystal in power-save mode for timekeeping, and reserve the 16 MHz crystal for active bursts. Estimated: in a meter waking once per second for 2 ms of active work, duty cycle is 0.2 percent, so average current is dominated by sleep-mode current - verify actual figures in the manufacturer datasheet for the -PA picoPower variant.
Solder the 64-QFN exposed pad to a solid ground pour with an array of thermal vias; this provides both the device ground return and thermal relief. Decouple VCC and AVCC with 100 nF ceramics placed within 2 mm of the pins, plus a 10 uF bulk capacitor near the supply entry. Route LCD segment lines with spacing from switching loads, and keep the crystal traces short and guarded by ground. On 0.5 mm-pitch QFN pads, specify NSMD pad geometry for reliable solder joints.
AVR maximum clock frequency derates with supply voltage - do not run 16 MHz at the bottom of the voltage range without checking the VCC-versus-fMAX curve in the datasheet. Bring SPI programming signals (MOSI, MISO, SCK, RESET) to accessible test points, since QFN pins cannot be probed in circuit. When substituting ATMEGA169A-MCH (non-picoPower) for this part, re-measure sleep current; code is compatible but the power budget may shift. Confirm LCD biasing capacitor requirements against the datasheet for your glass configuration.
Impormasyon ng Pagsunod sa Kautusan
RoHS compliant per distributor listings (DigiKey/Mouser) for the Microchip -MCH green/lead-free 64-QFN package. REACH and conflict-minerals declarations should be obtained from Microchip's quality portal for the specific date code.
