MCHC908QY2MDWER - 8-bit HC08 MCU 1.5KB Flash | NXP SOIC-16
MPN: MCHC908QY2MDWER ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
MCHC908QY2MDWER Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, and a configurable set of peripheral interfaces. The 8-bit MCUs of the HC08 family occupy the lowest tier of the embedded-controller taxonomy: 8-bit core -> microcontroller -> embedded controller -> semiconductor IC. They remain popular where deterministic behaviour, low unit cost, and minimal active power outweigh the throughput advantages of 32-bit Cortex-M parts.
Key features include an HC08 CPU core, 1.5 KB Flash with in-system programmability via the built-in MON08 debug/monitor mode, a 10-bit successive-approximation ADC with multiple input channels, a 16-bit timer with pulse-width modulation capability, and a low-power STOP and WAIT modes that drop current consumption to single-digit microamps. The integrated brown-out reset and multiple I/O pins (with high-current sink/source capability on selected pins) allow direct drive of relays and LED arrays without external drivers.
The MCHC908QY2MDWER uses a 5 V-tolerant CMOS process with a two-stage pipeline HC08 core, executing most instructions in two bus cycles and delivering roughly 1 MIPS per MHz. Its monotonic 10-bit ADC achieves at least 10-bit accuracy over the full operating range, and the timer module supports input-capture, output-compare, and PWM modes for motor and lighting control. Internal protection includes a low-voltage inhibit (LVI) block, a computer-operating-properly (COP) watchdog timer, and an illegal-address reset to improve field reliability.
Typical applications include low-cost appliance controllers, battery chargers, remote keyless-entry fobs, simple sensor interfaces, LED drivers, and small motor-control boards. The 1.5 KB Flash is sized for the kind of compact, fixed-function firmware found in white goods, toys, and consumer accessories rather than complex protocol stacks.
When designing with this part, mind that the 1.5 KB Flash limits firmware size: use the C-optimizing HC08 toolchain, place constant tables in Flash, and leverage the monitor ROM for in-application reprogramming. Keep ADC inputs short and bypassed to preserve conversion accuracy, and ensure that the asynchronous COP watchdog is serviced frequently enough for your fault-recovery budget.
This page consolidates distributor pricing, drop-in alternatives, and practical engineering considerations not found in the manufacturer datasheet alone.
Drop-in alternatives for MCHC908QY2MDWER — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MCHC908QY2MDWER (same form factor and footprint) — differing in Mounting Type, Package, Program Memory Size, Family, Manufacturer.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC908QY2ACDWER
✅ Drop-In✓ In Stock
$2.21 / Unit
View Datasheet →MCHC908QY1MDWE
✅ Drop-In✓ In Stock
$3.42 / Unit
View Datasheet →MC908QY4AMPE
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.84 / Unit
View Datasheet →MC908QT2ACPE
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.75 / Unit
View Datasheet →MC908QB4CPE
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.1 / Unit
View Datasheet →MCHC908QY2MDWER Maximum Ratings & Electrical Characteristics
| Manufacturer | NXP Semiconductors (formerly Freescale Semiconductor) |
| Part Family | M68HC908QY/QT 8-bit MCU |
| Core | HC08 (8-bit) |
| Program Memory (Flash) | 1.5 KB |
| RAM | 128 bytes |
| ADC | 10-bit, multi-channel |
| Supply Voltage (Vcc/Vdd) | 2.7 V to 5.5 V |
| Operating Temperature Range | -40 C to +125 C (industrial) |
| Package | 16-pin SOIC (DWE), 7.5 mm body width |
| Mounting Type | Surface Mount (SMT) |
| I/O Pins | 13 (general purpose, with shared ADC/Timer functions) |
| Timers | 1 x 16-bit TIM (input capture, output compare, PWM) |
| Watchdog | Yes (COP, computer-operating-properly) |
| Brown-out / LVI Reset | Yes (low-voltage inhibit) |
| In-System Programming | Yes (via MON08 / monitor ROM) |
| Internal Oscillator Support | Yes (external crystal/ceramic resonator modes) |
| Lead-Free / RoHS | Yes (RoHS3 compliant per datasheet) |
| Tray / Reel | Tape & Reel (ER suffix on manufacturer part number) |
MCHC908QY2MDWER Pin Configuration
| Pin 1 | VREFH / VPP — ADC reference high / HV programming supply input (MON08 HVPP) |
| Pin 2 | PTA0 / ADC0 — Bidirectional I/O with analog ADC input channel 0 |
| Pin 3 | PTA1 / ADC1 / TCH0 — Bidirectional I/O, ADC channel 1, timer channel 0 (PWM/IC/OC) |
| Pin 4 | PTA2 / ADC2 / TCH1 — Bidirectional I/O, ADC channel 2, timer channel 1 (PWM/IC/OC) |
| Pin 5 | PTA3 / ADC3 / IRQ — Bidirectional I/O, ADC channel 3, external interrupt request input |
| Pin 6 | PTA4 / RST — Bidirectional I/O or external reset input (per configuration) |
| Pin 7 | PTA5 — Bidirectional I/O, high-current sink/source capable |
| Pin 8 | OSC1 — Crystal / resonator / external clock input |
| Pin 9 | OSC2 — Crystal / resonator feedback (or NC in external-clock mode) |
| Pin 10 | PTA6 — Bidirectional I/O, high-current sink/source capable |
| Pin 11 | PTA7 — Bidirectional I/O, high-current sink/source capable |
| Pin 12 | PTB0 / ADC4 / SDA — Bidirectional I/O, ADC channel 4, optional I2C-style SDA |
| Pin 13 | PTB1 / ADC5 / SCL — Bidirectional I/O, ADC channel 5, optional I2C-style SCL |
| Pin 14 | VSS — Ground reference |
| Pin 15 | NC — Not connected (per datasheet) |
| Pin 16 | VDD — Positive supply (2.7 V to 5.5 V) |
Typical Applications
MCHC908QY2MDWER is suitable for 6 applications: Cost-Sensitive Appliance Control, Battery Charger / Smart-LED Driver, Remote Keyless Entry / Toy / Hobby Electronics, Sensor Interface / Data Acquisition Front-End, Small Motor Speed Control (BLDC / Fan), Industrial Sensor / LED-Indicator Module.
Cost-Sensitive Appliance Control
The MCHC908QY2MDWER is well matched to low-cost appliance controls because its HC08 core, 1.5 KB Flash and 128 bytes RAM cover the small, fixed-function firmware typical of microwave keypads, coffee makers and washing-machine user interfaces. The 2.7 V to 5.5 V supply allows direct tap from 3-cell battery packs or a 5 V USB rail, eliminating a regulator and shrinking the BOM. The 16-bit timer with PWM output drives small inductive loads, relays or solenoid valves directly through high-current GPIO pins, reducing external driver cost. Brown-out reset and the COP watchdog keep the appliance safe during line-voltage sag and brown-out events, which are common in regions with unstable mains. The DWE SOIC-16 package also passes SMT assembly lines that the legacy DIP variants cannot reach.
Recommended
Battery Charger / Smart-LED Driver
In NiMH, lead-acid float or lithium-iron-phosphate chargers in the 5 V class, the MCHC908QY2MDWER handles charge-state tracking, taper detection and fault logging without a digital signal processor or an external op-amp front end. Its 10-bit ADC is sufficient for V and I monitoring with one or two current-sense amplifiers, and the 16-bit timer generates PWM up to several kHz for hysteretic and constant-current topologies. The 1.5 KB Flash leaves enough room for state-machine logic, LED breathing effects and temperature-compensation lookup tables, while 128 bytes of RAM holds a small history buffer. STOP and WAIT modes drop current into the single-digit microamp region, which is critical when a charger is plugged in continuously and standby energy matters. Compared with newer S9S08 parts, the QY2 trades away analog peripherals for a lower unit price that suits very high-volume chargers.
Recommended
Remote Keyless Entry / Toy / Hobby Electronics
Remote keyless-entry fobs, IR/RF remote controls and battery-powered toys stress the MCU on three fronts: unit cost, standby current, and solder-joint survivability. The MCHC908QY2MDWER meets all three: the HC08 core is inexpensive, STOP mode draws very low current so a single CR2032 coin cell lasts a year or more, and the 16-pin SOIC body is rugged enough for hand-solder rework when prototypes arrive by mail. The 10-bit ADC reads potentiometer-based thumbwheels and battery-voltage sense for low-battery warning LEDs, while the timer block generates 38 kHz carrier for IR TX. Compared to a CPLD or 32-bit Cortex-M0+, this part shaves 30 to 70 percent off the BOM cost on a 25 to 50-cent class remote.
Recommended
Sensor Interface / Data Acquisition Front-End
When paired with an analog sensor bridge (load cell, thermopile, PIR), the MCHC908QY2MDWER runs low-rate acquisition, linearisation, threshold detection and one-wire or UART reporting. The 10-bit ADC delivers adequate resolution for general-purpose thermistor, photodiode and PIR front-ends, and the digital-IO bus runs either an I2C-compatible slave protocol or a simple UART. With 1.5 KB Flash enough to host a small finite-state machine plus lookup tables for linearisation, designers can replace a dedicated sensor ASIC with a flexible MCU-only implementation that adapts to multiple product variants from one firmware base. Brown-out reset protects the Flash image during supply collapse from a battery, and the small SOIC-16 body keeps the front-end PCB smaller than 20 mm by 30 mm.
Recommended
Small Motor Speed Control (BLDC / Fan)
For small fans, 5 V pumps and toy-grade brushed DC motors, the MCHC908QY2MDWER delivers elementary closed-loop control using the on-chip 10-bit ADC for back-EMF sensing or current shunt feedback and the 16-bit timer for PWM commutation. Firmware in 1.5 KB of Flash is enough to implement a fixed speed PI loop, soft-start ramps, and stall detection on a single MCU, removing the need for a dedicated motor-driver logic device. Brown-out (LVI) and COP recovery keep the motor safe during supply glitches, which is critical when the motor shares a supply with a load that also drives inductive kickbacks. Industrial temperature grading (-40 C to +125 C) supports underhood or long-life consumer-fan deployments.
Recommended
Industrial Sensor / LED-Indicator Module
Compact industrial sensor modules and stack-light LED indicators usually need 5 V tolerance, long-term availability, and the ability to handle a noisy 24 V supply through a small DC-DC converter. The MCHC908QY2MDWER pairs with a 5 V LDO for the MCU and uses the timer PWM to drive indicator LED strings or to create path-light gradients. The 1.5 KB Flash plus 128 bytes RAM holds fault codes and blink patterns for stack lights, plus an RS-485 or UART-side state machine via the GPIO. Compared to a discrete 555/4017 LED driver chain, this MCU cuts part count and adds programmability (different blink patterns per SKU) without exceeding a dollar-level BOM cost target.
Recommended
Recommended Products Summary
Engineering reference data for MCHC908QY2MDWER — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC908QY2ACDWER | MCHC908QY1MDWE | MC908QY4AMPE | MC908QT2ACPE | MC908QB4CPE |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors (Freescale) | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | SOIC-16 (DWE) | SOIC-16 (DWE) - same footprint | SOIC-16 (DWE) - same footprint | SOIC-16 (DWE) - same footprint | DIP-8 - smaller pin-count | DIP-8 - smaller pin-count |
| Core | HC08 (8-bit) | HC08 (8-bit) | HC08 (8-bit) | HC08 (8-bit) | HC08 (8-bit) | HC08 (8-bit) |
| Flash Memory | 1.5 KB | 1.5 KB | 1.0 KB | 4 KB | 1.5 KB class | 1.5 KB class |
| RAM | 128 bytes | 128 bytes | 64 bytes | 128 bytes | 128 bytes | 128 bytes |
| ADC | 10-bit, multi-channel | 10-bit, multi-channel | 10-bit, multi-channel | 10-bit, multi-channel | Reduced channel count | 4-channel |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Watchdog / LVI Reset | Yes (COP + LVI) | Yes (COP + LVI) | Yes (COP + LVI) | Yes (COP + LVI) | Yes (COP + LVI) | Yes (COP + LVI) |
Key Differentiators
- Smallest NXP HC08 with the full QY2 peripheral mix in SOIC-16 DWE (vs MC908QT2ACPE)
- 1.5 KB Flash is sufficient for typical state-machine firmware (vs MCHC908QY1MDWE)
- NXP-authorised long-term manufacturing through Rochester Electronics (vs MC9S08QG4CFFE)
Design Notes
Estimated: at 5 V supply, full peripheral active, and 8 MHz internal bus, the HC08 core plus peripherals will draw roughly 6 to 10 mA. STOP mode current drops to a few microamps, so designs that spend >90 percent of time dormant (sensor edge nodes, remote fobs) should software-fence STOP aggressively and only wake on IRQ or timer overflow. Place a 100 nF decoupling capacitor within 5 mm of VDD and a 1 microfarad bulk capacitor on the same rail per NXP hardware design guidelines for HC08 family MCUs.
Keep ADC traces away from the PWM timer-pad output to avoid coupled switching noise that corrupts conversions on adjacent analog pins. Use a 0.1 microfarad ceramic between VREFH and VSS, located within 3 mm of the pin, to stabilise ADC reference. Reserve a guard ring around the ADC input traces if you need < 1 LSB noise when reading millivolt-level sensor bridges. Verify final routing against the latest NXP SOIC-16 land-pattern recommendation (IPC-7351 SOIC127P690X160-16M).
When programming in-circuit via MON08, ensure the IRQ/TCLK pin is not pulled low by the application, or the background debug module will fail to handshake - it is the most common reason MON08 connect failures. With only 1.5 KB of Flash, do not include an oversized standard library; use the C compiler's `-Os` optimisation with `--gc-sections` to remove unused routines. Ensure that the COP watchdog refresh rate is faster than the longest task under all conditions, since an unrefreshed COP reset will look like a spurious restart and corrupt Flash if a write is in progress.
Estimated: at 5 V, 5 mA active and ambient 25 C, the SOIC-16 part dissipates approximately 25 mW, giving a junction rise of < 1 C - derating is not required. In STOP mode the dissipation drops to single-digit milliwatts. The industrial temperature grade (-40 C to +125 C) is the operating envelope, not a die-temperature spec; at 125 C ambient, expect higher leakage current in STOP and design wake-up timing margins accordingly.
OSC1 and OSC2 should be routed short and matched; surface-mount the crystal or ceramic resonator within 5 mm of the pins, and avoid running other high-current traces underneath the oscillator loop. For external-clock mode, drive OSC1 only and leave OSC2 floating for lowest noise. Place a 1 megohm resistor across OSC1-OSC2 in crystal mode to bias the internal oscillator and reduce start-up time, per the NXP reference design.
Compliance Information
Per the distributor listing (ROHS3 compliant) and NXP product page; AEC-Q100 qualification does not apply to industrial-grade 908 QY/QT variants.
