NXP Semiconductors MCHC908QY4MDWER

Overview

MCHC908QY4MDWER from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08-core microcontroller with 4 KB Flash, 192 B RAM, internal 32 MHz RC oscillator, 8-channel 8-bit ADC, and integrated KBI/IRQ/COP/LVI modules. It operates from 2.7–5.5 V and targets low-cost, space-constrained embedded control in appliance motor drives, industrial sensors, and battery-powered instrumentation.

For engineers reviewing the MCHC908QY4MDWER datasheet, MCHC908QY4MDWER pinout, MCHC908QY4MDWER application, or MCHC908QY4MDWER equivalent, key selection criteria include its 16-pin SOIC-W package, 8-bit ADC resolution with selectable clock prescaler, internal oscillator trim capability, and support for WAIT/STOP low-power modes with wake-up on IRQ/KBI events.

Technical Context

The MCHC908QY4MDWER implements the HCS08 CPU core with 16-bit address bus, 8-bit data path, and Harvard architecture memory map including 4 KB on-chip Flash (with block protection), 192 B RAM, and 128 B EEPROM-like register space. It integrates a System Integration Module (SIM) managing clock distribution, reset sources, and interrupt vectoring.

Its analog subsystem includes an 8-channel single-ended 8-bit ADC with programmable conversion time (16–256 µs), configurable input clock divider, and dedicated conversion-complete interrupt. Digital I/O comprises two 8-bit ports (Port A and Port B), with Port A supporting keyboard interrupt (KBI) functionality on up to 6 pins and Port B offering general-purpose I/O with IRQ capability.

Key Specifications

Pinout & Package

Package: 16-pin SOIC-W (Wide-body), 7.5 mm width, 1.27 mm pitch, RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with MC9RS08KA2CSC and STM8S003F3P6, the MCHC908QY4MDWER provides unique KBI hardware acceleration and factory-trimmed RC oscillator accuracy ideal for ultra-low-cost, low-power keypad-based systems where minimizing external components and standby current is critical.

Availability

MCHC908QY4MDWER is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, smart thermostat interfaces, and portable medical instruments requiring stable component supply across long production lifecycles.

Supply support for MCHC908QY4MDWER includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader delivering secure, scalable solutions for automotive, industrial, IoT, and mobile applications, with heritage from Freescale and Philips.

The MCHC908QY4MDWER belongs to the legacy HCS08 microcontroller family designed for cost-sensitive, low-power embedded control where deterministic real-time response, minimal external components, and long-term supply stability are essential.

FAQ

What is the maximum operating frequency of the MCHC908QY4MDWER?

The MCHC908QY4MDWER supports a maximum bus clock frequency of 20 MHz, derived from its internal 32 MHz RC oscillator divided by 2 (BUSCLK = INTCLK/2). This yields a 20 MHz instruction execution rate for the HCS08 core, enabling sub-microsecond interrupt latency and fast I/O toggling in real-time control loops.

Does the MCHC908QY4MDWER support in-circuit programming?

Yes, the MCHC908QY4MDWER supports in-circuit programming via the Background Debug Mode (BDM) interface using a standard Freescale/NXP BDM pod. The on-chip Flash can be reprogrammed without removing the MCHC908QY4MDWER from the target board, enabling field firmware updates and development iteration.

What is the ADC input voltage range for the MCHC908QY4MDWER?

The ADC input voltage range for the MCHC908QY4MDWER is 0 V to VDD, with VDD serving as the analog reference. When VDD = 5.0 V, the full-scale range is 0–5.0 V; when VDD = 3.3 V, it is 0–3.3 V. The ADC provides 8-bit resolution (256 steps) with typical INL of ±1 LSB across this range.

Can the MCHC908QY4MDWER operate from a 3.3 V supply?

Yes, the MCHC908QY4MDWER is fully specified to operate from 2.7 V to 5.5 V, making it compatible with standard 3.3 V power rails. All I/O pins are 5 V tolerant when configured as inputs, allowing direct interfacing with 5 V peripherals without level shifters.

How does the KBI module function on the MCHC908QY4MDWER?

The KBI module on the MCHC908QY4MDWER monitors up to six Port A pins (PTA0–PTA5) for edge transitions and generates an interrupt without CPU intervention. In STOP mode, it wakes the MCHC908QY4MDWER within 4 µs of a key press, enabling ultra-low-power human interface operation with typical standby current below 1 µA.