NXP MCX C15 MCUs Pack 16-Bit Analog Under 60 Cents

The interesting microcontroller news is rarely about peak clock speed. It is about how much analog you can get for how little money, and how little current the part draws when nothing is happening. NXP's new MCX C15 and C16 families, detailed by CNX Software on August 21, 2026, are a good example: Cortex-M23 microcontrollers that start under 60 cents in volume and bring a 16-bit ADC, a programmable-gain op-amp, and a comparator to that price point.

• Price: the MCXC151VFM with 32KB flash in H-PQFN32 sells for under 60 cents in quantity; the FRDM-MCXC162 development board is $15
• MCX C15: Cortex-M23 at 48 MHz, 6KB SRAM, 32KB flash; MCX C16: 72 MHz, 12KB SRAM, 64KB flash
• Analog: 16-bit SAR ADC with up to 18 channels, a high-speed comparator with an 8-bit DAC, and an on-chip op-amp with programmable gain
• Power: 33 microamps per MHz active, 2.91 microamps in power down, and 320 nanoamps in deep power down

Why an On-Chip Op-Amp Changes the Bill of Materials

Most low-cost microcontrollers hand you an ADC and leave signal conditioning to you. That usually means an external op-amp, a handful of resistors, and the board space and calibration headaches that come with them. Folding a programmable-gain amplifier onto the die lets a designer feed a low-level sensor signal straight into the part and set the gain in firmware.

Combine that with the 16-bit SAR ADC, the comparator with its integrated 8-bit DAC, and a FlexPWM module with six complementary outputs, and the target applications become obvious: current sensing, motor control, battery monitoring, and the long tail of industrial IoT nodes that measure something analog and report it over a serial link. Communications are deliberately modest — three or four LPUART ports, one LPI2C, one LPSPI — with up to 45 GPIOs depending on package.

How Low Does the Power Draw Actually Go?

NXP publishes a four-tier power ladder with wake-up times attached, which is the specification that actually matters for a battery-powered node:

• Active: 33 microamps per MHz
• Deep sleep: 14 microamps, waking in 15.89 microseconds
• Power down: 2.91 microamps, waking in 28.47 microseconds
• Deep power down: 320 nanoamps, waking in 301.06 microseconds

The trade is the usual one — the deeper the sleep state, the longer the wake-up — but 320 nanoamps with a sub-millisecond return to life is the kind of figure that makes a coin cell last for years. Both families run from 1.7V to 3.6V across a -40C to 125C industrial temperature range and score 153 CoreMark at 2.13 CoreMark/MHz.

Migration Path From LPC and Kinetis Parts

The detail that will matter most to engineers with existing designs is pin compatibility. NXP is positioning the MCX C series as a straightforward migration path from LPC800, LPC1100, and Kinetis microcontrollers, with full pin-to-pin compatibility. That turns what is normally a board respin into a firmware port, and it is the same playbook NXP used with the MCX A5 post-quantum MCUs earlier this week.

Fifteen SKUs are available across memory, package, and GPIO options, with 24-pin and 16-pin packages slated for December 2026. Lead time is estimated at 16 weeks. Development runs on NXP's MCUXpresso ecosystem, including the SDK, a VS Code extension, and ready-made examples through the Application Code Hub.

If you are weighing this against an ESP32 or nRF54L part for a low-power design, our low-power wireless MCU guide walks through the trade-offs, and more silicon news lives in our mini computers coverage.

Sources: CNX Software — August 21, 2026; NXP Semiconductors — August 2026.