MC9S08GT32ACBE - 8-Bit S08 MCU, 32KB Flash, 40MHz | NXP
MPN: MC9S08GT32ACBE ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $5.1 | $510.00 |
| 500 | $4.55 | $2,275.00 |
| 1,000 | $4.1 | $4,100.00 |
MC9S08GT32ACBE Overview
An 8-bit microcontroller (MCU) is a microprocessor core with an 8-bit data path, internal program memory (Flash/ROM), data memory (RAM), and integrated peripherals such as timers, analog-to-digital converters, and communication ports. Within the broader semiconductor taxonomy, an MCU is a sub-class of microprocessors belonging to the embedded processor hierarchy, falling under Integrated Circuits > Microcontrollers. The S08 core is an enhanced version of the original HC08 architecture, offering improved instruction set efficiency and lower power consumption than legacy 5V designs.
Key features of the MC9S08GT32ACBE include 32 KB Flash program memory, 4 KB RAM, an internal bus speed up to 40 MHz (20 MHz bus), an integrated multi-channel ADC, multiple timer modules (TPM), and serial interfaces (SCI/SPI/IIC). The 42-pin PDIP package supports through-hole assembly for prototyping, hobby projects, legacy board replacements and industrial control panels where a socketed or hand-soldered solution is preferred over surface mount.
The device is built on a 0.25 µm CMOS process with a wide operating voltage range of 2.7V to 5.5V, supporting both 3.3V and 5V system designs. Its low-power modes (wait, stop3) make it suitable for battery-powered and energy-conscious applications. Compared to legacy HC08 parts, the S08 core adds BGND instruction for debug access and improved indexing modes, while preserving binary compatibility with most HC08 instruction patterns.
Typical applications include appliance controls (washing machines, microwave ovens, HVAC), industrial sensor interfaces, low-end consumer electronics, smart metering peripherals, motor control BLDC driver boards, and educational/development kits. The 32 KB Flash is sufficient for state-machine firmware, small RTOS kernels, or fixed-function control loops.
Design considerations: place decoupling capacitors (100 nF plus 4.7 µF bulk) close to VDD/VSS pins, use the integrated voltage regulator with proper bulk capacitance, and respect the absolute maximum ratings of -0.3V to +6V on digital pins. The 42-pin PDIP footprint requires through-hole plating or socketed headers.
This page synthesizes distributor pricing, drop-in NXP same-family alternatives (including the 44-QFP package variant) and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for MC9S08GT32ACBE — 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 MC9S08GT32ACBE (same form factor and footprint) — differing in Package, Mounting Type, Core Processor, RAM Size, Instruction Set.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08GT60ACBE
✅ Drop-In✓ In Stock
$4.62 / Unit
View Datasheet →MC9S08GT16ACBE
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08GT32ACBE Maximum Ratings & Electrical Characteristics
| Core | S08 (enhanced 8-bit HC08-compatible) |
| Program Memory (Flash) | 32 KB |
| RAM | 4 KB |
| Maximum CPU Frequency | 40 MHz |
| Operating Voltage | 2.7 V to 5.5 V |
| Package | 42-pin PDIP (Plastic DIP) |
| Pin Count | 42 |
| ADC | Multi-channel 10-bit ADC |
| Timers | TPM (Timer/PWM Module) |
| Serial Interfaces | SCI (UART), SPI, IIC |
| Operating Temperature | -40C to +85C (industrial) |
| Mounting Type | Through-Hole (PDIP) |
MC9S08GT32ACBE 42-pin pdip (plastic dip) Pin Configuration Guide
Pin configuration for MC9S08GT32ACBE (42-pin pdip (plastic dip) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for MC9S08GT32ACBE.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S08GT32ACBE is suitable for 6 applications: Home Appliance Control, HVAC Thermostat and Fan Control, Industrial Sensor Interface Module, Low-End Consumer Electronics Remote and Toy, Smart Meter Peripheral Controller, Educational Development and Prototyping Board.
Home Appliance Control
The MC9S08GT32ACBE is well-matched to home appliance control boards such as washing machines, microwave ovens, and dishwashers where 32 KB Flash holds the state-machine firmware, the integrated 10-bit ADC reads temperature and water-level sensors, and TPM timers generate PWM signals for motor and valve drivers. The 40 MHz bus clock is fast enough for sensor-fusion loops, while the -40C to +85C industrial temperature range covers kitchen and laundry environments. The 2.7-5.5 V supply range simplifies designs that must work with both 3.3 V logic peripherals and 5 V relay driver boards, and the 42-PDIP package supports through-hole assembly for service-friendly field replacement.
Recommended
HVAC Thermostat and Fan Control
In HVAC thermostat and fan-speed controller designs, the MC9S08GT32ACBE's SCI (UART) connects to Wi-Fi or sub-GHz radio modules for remote telemetry, while its TPM channels drive TRIAC phase-control or BLDC commutation firmware. The 4 KB RAM is sufficient for PID control loops with floating-point math, and the 32 KB Flash holds the menu UI, scheduling logic, and Modbus stack. Wide 2.7-5.5 V operation tolerates unregulated 5 V or 12 V rails after a simple LDO, and the industrial temperature grade supports attic and outdoor equipment housings.
Recommended
Industrial Sensor Interface Module
The MC9S08GT32ACBE's IIC and SPI ports interface with industrial sensors (temperature, pressure, accelerometer), and the SCI port streams readings to a host PLC or gateway over RS-232/RS-485 transceivers. The integrated ADC digitizes 4-20 mA loop signals when paired with a shunt resistor, while the 40 MHz bus speed handles decimation filtering. The 42-PDIP package suits DIN-rail controller boards assembled with through-hole opto-isolators and terminal blocks, and the 2.7-5.5 V range accommodates 24 V industrial bus rails after regulation.
Recommended
Low-End Consumer Electronics Remote and Toy
Toys, remote controls, and small consumer gadgets leverage the MC9S08GT32ACBE's low-power wait and stop3 modes to extend battery life, while the S08 core runs IR or RF protocol stacks (RC5, NEC, proprietary OOK) from the 32 KB Flash. The ADC monitors battery voltage for low-battery warnings, and PWM drives vibration motors or backlight LEDs. The PDIP package supports through-hole battery compartments and educational kit assembly with hand-soldered headers.
Recommended
Smart Meter Peripheral Controller
The MC9S08GT32ACBE serves as a peripheral MCU in electricity, water, or gas meters, where the SCI port connects to the main metrology processor and the ADC calibrates sensor front-ends. Its 32 KB Flash holds calibration tables and tamper-detection firmware, and its industrial temperature range ensures accuracy in outdoor meter enclosures. The wide supply range supports battery-backed RTC and supercapacitor energy buffers.
Recommended
Educational Development and Prototyping Board
The MC9S08GT32ACBE is a classic choice for university microcontroller courses and hobbyist development boards because the 42-PDIP package drops into standard 0.1 inch breadboard sockets and 40-pin DIP breakout boards. The CodeWarrior/MCUXpresso IDE and Processor Expert drivers provide free C compilers and peripheral init code. Students learn embedded concepts - GPIO, timers, ADC, serial comms - on real silicon with a 40 MHz bus and a mature S08 instruction set.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08GT32ACBE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08GT60ACBE | MC9S08GT16ACBE | MC9S08GT32ACFBE |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 42-PDIP | 42-PDIP - same | 42-PDIP - same | 44-QFP (10x10 mm) - different |
| Flash Memory | 32 KB | 60 KB | 16 KB | 32 KB |
| RAM | 4 KB | 4 KB | 2 KB | 4 KB |
| Maximum CPU Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Operating 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 |
| Mounting Type | Through-Hole (PDIP) | Through-Hole (PDIP) | Through-Hole (PDIP) | Surface-Mount (QFP) |
| Pin Count | 42 | 42 | 42 | 44 |
| Core | S08 (8-bit) | S08 (8-bit) | S08 (8-bit) | S08 (8-bit) |
Key Differentiators
- Highest Flash density in 42-PDIP S08 family (vs MC9S08GT16ACBE)
- Cost-optimized Flash for 42-PDIP budget designs (vs MC9S08GT60ACBE)
- Through-hole assembly for service-friendly designs (vs MC9S08GT32ACFBE)
Design Notes
Estimated: the MC9S08GT32ACBE draws approximately 15-25 mA active at 40 MHz from a 3.3 V supply. Place a 100 nF ceramic decoupling capacitor within 5 mm of each VDD pin and a single 4.7 µF bulk tantalum or ceramic capacitor near the regulator output. The internal voltage regulator requires a 1 µF external capacitor on the VDDA pin to maintain stability; do not omit this capacitor or core logic may experience reset glitches during power-up.
For the 42-pin PDIP variant, route the VDD/VSS pairs as adjacent pin pairs to minimize loop inductance. Keep the BDM (Background Debug Mode) 6-pin header (BKGD, RESET, VDD, VSS) accessible at the board edge to enable in-circuit debugging with a P&E Multilink or USB-ML-USB debugger. Place a 4.7 kΩ pull-up on RESET to VDD; the S08 internal pull-up is weak.
Do not exceed the absolute maximum supply voltage of 6 V on any VDD pin - the S08 family has no internal clamping diodes on VDD. Configure unused I/O pins as outputs (driving low) or inputs with internal pull-ups enabled to minimize power consumption in stop3 mode. When migrating to the S08PA family for new designs, expect different pinout and register changes; firmware portability is limited to the C source level, not the binary level.
Compliance Information
RoHS, REACH and lead-free status not explicitly confirmed in the verified distributor data for the 42-PDIP variant; consult the NXP product page or the latest material declaration. Not AEC-Q100 qualified - this is a general-purpose industrial MCU, not an automotive grade part.
