MC9S08GT32ACFBER - 8-bit S08 MCU 32KB Flash 40MHz | NXP
MPN: MC9S08GT32ACFBER ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $11.03 | $11.03 |
| 10 | $10.48 | $104.80 |
| 100 | $9.93 | $993.00 |
| 500 | $9.38 | $4,690.00 |
| 1,000 | $8.83 | $8,830.00 |
MC9S08GT32ACFBER Overview
An 8-bit microcontroller is an integrated circuit that combines a processor core, memory, and peripherals such as timers, ADC, and serial interfaces on a single chip, forming the lowest tier of the microcontroller hierarchy (MCU -> embedded processor -> semiconductor). The S08 family descends from the HC08 architecture, retaining CISC instruction-set compatibility while adding the BGND background-debug instruction, which simplifies in-circuit debugging through a single-wire background debug interface.
Key features of the MC9S08GT32ACFBER include up to 32 interrupt/reset sources, software-selectable internal pullups on port pins when configured as inputs, integrated PWM channels, an 8-channel 10-bit ADC, and serial communication interfaces including SCI (UART), SPI, and IIC. The industrial temperature grade supports demanding factory and automotive-adjacent environments.
Architecturally, the device uses a CMOS process with low-power wait and stop modes, making it suitable for battery-conscious designs. Flash memory supports in-circuit programming and erase, enabling field firmware updates without socketed parts. The internal oscillator option reduces external component count and bill-of-materials cost.
Typical applications include industrial control systems, consumer appliances, motor control and lighting control, and legacy HC08 design migrations where 32 KB of flash and rich timer resources are required.
Design considerations: the supply voltage range of 1.8 V to 3.6 V must be respected, and the 44-QFP footprint requires attention to decoupling capacitor placement on all VDD/VSS pairs.
This page synthesizes distributor pricing, drop-in alternatives within the MC9S08GT family, and practical design notes not found in the manufacturer datasheet, with pricing as of 2026-10-18.
Drop-in alternatives for MC9S08GT32ACFBER — 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 MC9S08GT32ACFBER (same form factor and footprint) — differing in Package, Mounting Type, ADC, Instruction Set, Maximum CPU Frequency.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08GT60ACFBE
✅ Drop-In✓ In Stock
$9.85 / Unit
View Datasheet →MC9S08GT16ACFBER
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08GT8ACFBER
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08GT32CFBER
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08GT32ACBE
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →MC9S08GT32ACFBER Maximum Ratings & Electrical Characteristics
| Core Processor | S08 (HCS08) |
| Core Size | 8-bit |
| Maximum Clock Frequency | 40 MHz |
| Program Memory Size | 32 KB (32K x 8) Flash |
| Data RAM Size | 4 KB |
| Supply Voltage Range | 1.8 V to 3.6 V |
| Number of I/O | 34 to 36 (sources vary, see validation note) |
| Peripheral Features | PWM channels, LVD, POR, WDT |
| ADC Resolution | 10-bit |
| Interface Type | I2C, SCI, SPI |
| Interrupt/Reset Sources | Up to 32 |
| Instruction Set | HC08-compatible CISC with added BGND instruction |
| Package | 44-QFP (10x10 mm), S-PQFP-G44 |
| Terminal Form | Gull Wing |
| Mounting Type | Surface Mount |
| Temperature Grade | Industrial |
| Programmability | In-circuit flash programmable |
MC9S08GT32ACFBER 44-qfp (10x10 mm), s-pqfp-g44 Pin Configuration Guide
Pin configuration for MC9S08GT32ACFBER (44-qfp (10x10 mm), s-pqfp-g44 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 MC9S08GT32ACFBER.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S08GT32ACFBER is suitable for 6 applications: Industrial Control Systems, Consumer Appliances, Motor Control (DC / BLDC Basic), Lighting Control, HC08 Legacy Migration, Battery-Powered Portable Devices.
Industrial Control Systems
The MC9S08GT32ACFBER fits industrial control nodes that need deterministic 8-bit control with modest code size. Its 40 MHz HCS08 core executes control loops fast enough for relay sequencing, sensor polling, and actuator timing, while 32 KB of flash accommodates protocol stacks such as Modbus-over-SCI. The industrial temperature grade and 1.8 V to 3.6 V supply range tolerate factory-floor supply variation, and software-selectable pullups on up to 36 I/O lines reduce external resistor count on discrete input cards. The watchdog timer and low-voltage detection improve field reliability, and in-circuit flash programming allows firmware updates without desoldering the QFP.
Recommended
Consumer Appliances
In appliance control boards such as washing machines, coffee makers, and fans, the MC9S08GT32ACFBER provides the timer resources, PWM channels, and 10-bit ADC needed to drive user interfaces, heaters, and small motors at low BOM cost. The 8-channel ADC reads thermistors, user potentiometers, and button dividers, while PWM outputs drive triac or transistor stages for motor speed control. The integrated internal oscillator option removes the crystal from cost-sensitive boards, and the HC08-compatible CISC core lets teams reuse assembly code from previous HC08-based appliance platforms, shortening migration schedules. Stop and wait modes cut standby power for energy-regulated products.
Recommended
Motor Control (DC / BLDC Basic)
For fan, pump, and small BLDC motor drives, the MC9S08GT32ACFBER generates the PWM waveforms and reads the feedback signals required for basic commutation and speed regulation. Its PWM channels drive a gate-driver stage while the 10-bit ADC samples the shunt current and back-EMF signals; the 40 MHz bus gives roughly 10 MIPS-class throughput, adequate for six-step commutation at typical fan speeds. The 32 KB flash holds commutation tables plus a serial diagnostics link over SCI. Designers should budget ADC sampling latency into the control loop and use the timer input-capture channels for Hall sensor edge timing, achieving closed-loop speed control without an external controller IC.
Recommended
Lighting Control
Dimming and color-mixing luminaires benefit from the MC9S08GT32ACFBER's PWM outputs and ADC inputs. The PWM channels drive LED string current regulators or triac phase-control stages with resolution sufficient for flicker-free dimming, while the 10-bit ADC reads dimmer potentiometers, ambient light sensors, and LED temperature sensors for thermal foldback. The 32 KB flash accommodates DMX-over-SCI or proprietary wired protocols alongside the lighting engine, and the industrial temperature grade suits enclosed, heat-stressed fixtures. Low-power stop mode supports standby requirements in permanently installed luminaires, and in-field flash reprogramming enables feature updates after installation.
Recommended
HC08 Legacy Migration
Many existing products are built on the older MC68HC08 family; the MC9S08GT32ACFBER is the natural consolidation path because the enhanced S08 core retains HC08 CISC instruction-set compatibility, letting most existing assembly and C code recompile with minimal change. The BGND instruction plus the single-wire background debug interface replace aging HC08 monitor-mode tools with modern in-circuit debugging. In a 44-QFP footprint the GT32 offers 32 KB flash and 4 KB RAM, typically exceeding the memory of the legacy part it replaces, so migration also frees headroom for added features. Software-selectable pullups can replace discrete resistor networks on the legacy board.
Recommended
Battery-Powered Portable Devices
Handheld meters, remote controls, and portable instrumentation operate from the MC9S08GT32ACFBER's wide 1.8 V to 3.6 V supply range, allowing direct operation from two alkaline cells or a single lithium cell through the discharge curve. Wait and stop modes reduce average current so that the 40 MHz performance is available on demand rather than continuously, and the internal clock sources can run the CPU with the oscillator stopped. The 10-bit ADC reads battery voltage for fuel-gauging and external sensor channels, and the 32 KB flash supports application code plus a persistent calibration and logging area, reducing external memory components in compact enclosures.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08GT32ACFBER — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08GT60ACFBE | MC9S08GT16ACFBER | MC9S08GT8ACFBER | MC9S08GT32CFBER |
|---|---|---|---|---|---|
| Package | 44-QFP (10x10 mm) | 44-QFP (10x10 mm) - same | 44-QFP (10x10 mm) - same | 44-QFP (10x10 mm) - same | 44-QFP (10x10 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Flash Memory | 32 KB | 60 KB | 16 KB | 8 KB | 32 KB |
| Maximum Clock Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 20 MHz |
| Supply Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Core | S08 (HCS08) 8-bit | S08 (HCS08) 8-bit | S08 (HCS08) 8-bit | S08 (HCS08) 8-bit | S08 (HCS08) 8-bit |
Key Differentiators
- Double the flash headroom (vs MC9S08GT16ACFBER)
- Full-speed 40 MHz operation (vs MC9S08GT32CFBER)
- Cost-optimized right-sizing (vs MC9S08GT60ACFBE)
Design Notes
The MC9S08GT32ACFBER operates from 1.8 V to 3.6 V. Place a 0.1 uF ceramic decoupling capacitor at every VDD/VSS pin pair, as close to the package as possible, plus one bulk 4.7 uF to 10 uF capacitor near the supply entry. Keep VDDA/VSSA (analog supply for the 10-bit ADC) on a quiet supply rail, filtered with an RC or ferrite bead from the digital rail, or ADC results will show digital-noise artifacts. Verify brown-out reset (LVD) thresholds in the datasheet match your battery discharge curve.
The 44-QFP (10x10 mm) gull-wing package needs standard 0.5 mm-pitch SMD land patterns with solder-mask-defined pads per the NXP package outline drawing. Avoid routing fast signals directly under the package; use a solid ground plane on layer 2. The single-wire BKGD debug pin should be brought to a test pad or 6-pin Tag-Connect footprint for in-circuit flashing and debugging - omitting this access is one of the most common regrets on S08 boards, since the QFP cannot be programmed in a socket.
NXP community guidance confirms there is no drop-in replacement outside the MC9S08GT family; the newer S08PA family has a different pinout and requires PCB redesign. Do not select the MC9S08GT32CFBER (C grade) as a substitute without checking the 20 MHz clock and 2 KB RAM limits - code compiled with timing assumptions at 40 MHz will misbehave. Also confirm the exact ordering suffix: variants such as MC9S08GT32ACBE differ in packing and lead-finish options.
Compliance Information
RoHS compliance details published on the Mouser product page for MC9S08GT32ACFBER. REACH, halogen-free, and conflict-minerals declarations should be obtained directly from NXP compliance documentation.
