ATMEGA164P-A15MZ
ATMEGA164P-A15MZ - 16KB AVR MCU 16MHz 44-VQFN | Microchip
The Microchip Technology ATMEGA164P-A15MZ is a high-performance, low-power 8-bit AVR RISC microcontroller with 16 KB of in-system programmable Flash, 512 B EEPROM, and 1 KB SRAM, operating at up to 16 MHz from a 2.7 V to 5.5 V supply and housed in a 44-pin VQFN (7x7 mm) package rated for the extended -40 C to +125 C temperature range.
An AVR microcontroller is a single-chip computer built on a modified Harvard RISC architecture that executes most instructions in a single clock cycle. Within the semiconductor taxonomy, the ATmega164P sits at the intersection of the microcontroller, embedded processor, and integrated circuit families: it integrates CPU, non-volatile program memory, data memory, timers, serial interfaces, and analog peripherals on one die, eliminating the external memory bus and glue logic required by a microprocessor-based design.
Key features include 16 KB ISP Flash with read-while-write capability, 512 B EEPROM for parameter storage, 1 KB internal SRAM, 32 general-purpose I/O lines, 32 general-purpose working registers, and a real-time counter with a separate oscillator. Three flexible timer/counters with compare modes and PWM, two USARTs, a byte-oriented Two-Wire serial interface, and an 8-channel 10-bit ADC cover the majority of embedded control requirements without external support chips.
The device is built on Microchip picoPower technology, which combines multiple sleep modes, a 32 kHz real-time counter, and an on-chip calibrated oscillator to minimize active and standby current. The A15 speed grade is specified for 16 MHz operation across the full automotive temperature range, and the -A15MZ ordering code denotes the automotive-qualified QFN EP (exposed pad) package supplied in tape and reel.
Typical applications include automotive body control modules, industrial motor and process control, home appliance control boards, battery-powered instrumentation, and consumer embedded systems. The 44-pin QFN footprint with exposed pad provides a compact, thermally enhanced land pattern for space-constrained control boards.
When designing with this device, decouple every VCC pin with a 100 nF ceramic capacitor placed within a few millimeters of the pin, and connect the exposed pad to a solid ground plane for both electrical reference and heat spreading. The AVR505 and AVR527 migration application notes document the pin and code compatibility path from earlier ATmega16/32 devices.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single reference for selection, cross-reference, and layout decisions.
USD $1,58
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