MC9S08AC16MFGE - S08 8-bit MCU 16KB Flash 40MHz LQFP-44 | NXP
MPN: MC9S08AC16MFGE ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.12 | $5.12 |
| 10 | $4.65 | $46.50 |
| 100 | $3.92 | $392.00 |
| 500 | $3.4 | $1,700.00 |
| 1,000 | $2.95 | $2,950.00 |
MC9S08AC16MFGE Overview
An 8-bit microcontroller (MCU) is a small, low-power processor that integrates CPU, memory, and peripherals on a single silicon die. Within the semiconductor hierarchy, an MCU belongs to the broader family of microcontrollers, which sit under microprocessors, ICs, and finally semiconductors. The HCS08 family uses an enhanced S08 CPU core, which improves code density and peripheral integration compared to legacy HC08 cores.
Key features of the MC9S08AC16MFGE include 16 KB on-chip Flash for program storage, 1 KB RAM for data, 38 general-purpose I/O lines, a 10-bit successive-approximation ADC with up to 8 input channels, two Timer/PWM modules, and an internal clock source that supports crystal-less USB-less operation. The device also includes an integrated voltage regulator, low-voltage detection, and a hardware cryptographic accelerator (where marked) for secure communications.
The S08 architecture uses a von Neumann bus structure with 16-bit internal addressing, allowing linear access to the full memory map. The 40 MHz bus speed (20 MHz core with 2:1 pipeline) gives roughly 1.25 MIPS/MHz efficiency, suiting cost-sensitive control loops. The LQFP-44 package provides an industry-standard 0.8 mm pitch footprint compatible with hand-solderable and reflow-compatible PCB layouts.
Typical applications include automotive body controllers, industrial sensor interfaces, white-goods motor control, low-cost consumer appliances, and HVAC thermostats. Designers select this MCU when integration, low BOM cost, and 5 V tolerance outweigh the need for higher MIPS or larger memory.
When designing with this device, allocate adequate decoupling (0.1 uF on each VDD pair), keep analog/digital grounds separated, and route the RESET pin with a 10 kohm pull-up to VDD. For power-critical designs, leverage the STOP3 and Wait modes to reduce quiescent current below 1 uA.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on a stock NXP or DigiKey product summary alone.
Drop-in alternatives for MC9S08AC16MFGE — 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 MC9S08AC16MFGE (same form factor and footprint) — differing in Package, RAM, Mounting Type, RoHS Status, Core Processor.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08AC16CFGE
✅ Drop-In✓ In Stock
$2.6 / Unit
View Datasheet →MC9S08AC32MFGE
✅ Drop-In✓ In Stock
$5.98 / Unit
View Datasheet →MC9S08AC60CFGE
✅ Drop-In✓ In Stock
$3.42 / Unit
View Datasheet →MC9S08AC8MFGE
✅ Drop-In✓ In Stock
$4.95 / Unit
View Datasheet →MC9S08AC32CFGE
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MC9S08AC16MFGE Maximum Ratings & Electrical Characteristics
| Core | S08 (HCS08) 8-bit |
| Program Memory | 16 KB Flash |
| RAM | 1 KB |
| Maximum CPU Frequency | 40 MHz |
| Supply Voltage Range | 2.7 V to 5.5 V |
| I/O Pins | 38 |
| ADC | 10-bit, up to 8 channels |
| Timers/PWM | 2 TPM modules |
| Serial Interfaces | SCI (UART), SPI, I2C |
| Operating Temperature Range | -40 C to +125 C (industrial) |
| Package | 44-pin LQFP (10x10 mm), 0.8 mm pitch |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Internal Voltage Regulator | Yes (low-voltage detect) |
MC9S08AC16MFGE Pin Configuration
| Pin 1 | PTD1/TxD — Port D GPIO / SCI transmit |
| Pin 2 | PTD0/RxD — Port D GPIO / SCI receive |
| Pin 3 | PTC0 — Port C GPIO |
| Pin 4 | PTC1 — Port C GPIO |
| Pin 5 | PTC2 — Port C GPIO |
| Pin 6 | PTC3 — Port C GPIO |
| Pin 7 | VSS — Ground |
| Pin 8 | VDD — Supply voltage (2.7-5.5 V) |
| Pin 9 | PTC4 — Port C GPIO |
| Pin 10 | PTC5 — Port C GPIO |
| Pin 11 | PTC6 — Port C GPIO |
| Pin 12 | PTB7 — Port B GPIO |
| Pin 13 | PTB6 — Port B GPIO |
| Pin 14 | PTB5 — Port B GPIO |
| Pin 15 | PTB4 — Port B GPIO |
| Pin 16 | VSS — Ground |
| Pin 17 | VDD — Supply voltage |
| Pin 18 | PTB3 — Port B GPIO |
| Pin 19 | PTB2 — Port B GPIO |
| Pin 20 | PTB1 — Port B GPIO |
| Pin 21 | PTB0 — Port B GPIO |
| Pin 22 | PTA7 — Port A GPIO / ADC |
| Pin 23 | PTA6 — Port A GPIO / ADC |
| Pin 24 | PTA5 — Port A GPIO / ADC |
| Pin 25 | PTA4 — Port A GPIO / ADC |
| Pin 26 | PTA3 — Port A GPIO / ADC |
| Pin 27 | PTA2 — Port A GPIO / ADC |
| Pin 28 | PTA1 — Port A GPIO / ADC |
| Pin 29 | PTA0 — Port A GPIO / ADC |
| Pin 30 | VREFH — ADC reference high |
| Pin 31 | VREFL — ADC reference low |
| Pin 32 | BKGD — Background debug mode pin |
| Pin 33 | RESET — Reset input, active low |
| Pin 34 | IRQ — External interrupt request |
| Pin 35 | PTE7 — Port E GPIO |
| Pin 36 | PTE6 — Port E GPIO |
| Pin 37 | PTE5 — Port E GPIO |
| Pin 38 | PTE4 — Port E GPIO |
| Pin 39 | PTE3 — Port E GPIO |
| Pin 40 | PTE2 — Port E GPIO |
| Pin 41 | PTE1 — Port E GPIO |
| Pin 42 | PTE0 — Port E GPIO |
| Pin 43 | VSS — Ground |
| Pin 44 | VDD — Supply voltage |
Typical Applications
MC9S08AC16MFGE is suitable for 6 applications: Automotive Body Controllers, Industrial Sensor Interface Boards, White Goods Motor Control, Low-Cost Consumer Appliances, HVAC Thermostats, IoT Edge Sensor Nodes.
Automotive Body Controllers
The MC9S08AC16MFGE fits automotive body modules because of its 2.7-5.5 V supply range, -40 to +125 C industrial temperature grade, and on-chip 10-bit ADC for analog sensor reads. The HCS08 core at 40 MHz can scan multiple switch inputs and drive PWM-controlled loads like door locks, mirror adjust, and lighting FETs in real time. Compared to a discrete logic board, this MCU consolidates timing, ADC, SCI, and PWM into one LQFP-44 footprint, simplifying PCB layout and lowering BOM cost. The integrated low-voltage detect (LVD) supports cranking profiles on 12 V automotive rails when paired with an external regulator. SPI/I2C peripherals connect directly to LED drivers or sensor front-ends.
Recommended
Industrial Sensor Interface Boards
The 10-bit ADC and dual TPM timers in the MC9S08AC16MFGE allow industrial sensor interface boards to sample analog signals at up to roughly 100 ksps while driving PWM outputs to valve or motor stages. Its 38 GPIO pins accommodate parallel keypads, indicator LEDs, and discrete logic signals on the same PCB. The 5 V tolerance of the GPIO is useful when interfacing to legacy 5 V industrial sensors, and the SCI peripheral bridges to RS-485 transceivers with no extra glue. The LQFP-44 package supports reflow-compatible assembly, important for medium-volume industrial production runs.
Recommended
White Goods Motor Control
White-goods designs such as washing machines, dishwashers, and induction cooktops use the MC9S08AC16MFGE for cost-sensitive motor control loops. Two TPM modules deliver complementary PWM outputs to gate drivers or low-side FET switches, while the 10-bit ADC samples current and back-EMF for closed-loop regulation. The 16 KB Flash stores small RTOS-style control firmware plus diagnostics, and the 1 KB RAM holds transient calculation state. Industrial temperature grade plus integrated LVD suit the noisy electrical environment of mains-powered appliances.
Recommended
Low-Cost Consumer Appliances
For entry-level consumer appliances such as coffee makers, fans, and small kitchen tools, the MC9S08AC16MFGE provides sufficient MIPS at the lowest BOM cost in the S08AC family. The integrated 16 KB Flash fits typical UI state machines and PWM profiles, while the SCI/SPI/I2C peripherals drive displays, keypads, and indicator LEDs without external logic. STOP3 and Wait modes drop quiescent current to single-digit microamps, satisfying energy-star standby budgets.
Recommended
HVAC Thermostats
HVAC thermostat designs rely on the MC9S08AC16MFGE for analog temperature sensing, keypad/encoder UI input, and triac-style PWM heating/cooling actuation. The 10-bit ADC digitizes thermistor bridges directly, while the TPM timers generate zero-crossing or phase-angle control signals. Industrial temperature operation (-40 to +125 C) supports the enclosed equipment bay environment and adjacent heat sources. SCI enables connection to building automation networks, and the 16 KB Flash accommodates calibration tables and menu logic.
Recommended
IoT Edge Sensor Nodes
Edge IoT nodes benefit from the MC9S08AC16MFGE's low power modes and integrated peripherals: SCI/SPI/I2C can host radios, sensors, and EEPROM, while the 10-bit ADC reads environmental data on demand. The MCU wakes from STOP3 in microseconds, allowing duty-cycled operation that extends battery life. Industrial temperature operation makes the part suitable for outdoor enclosures, and the LQFP-44 footprint supports both hand-soldered prototypes and high-volume reflow production.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08AC16MFGE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08AC16CFGE | MC9S08AC32MFGE | MC9S08AC60CFGE | MC9S08AC8MFGE | MC9S08AC32CFGE |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 44-LQFP (10x10 mm) | 44-LQFP (10x10 mm) - same | 44-LQFP (10x10 mm) - same | 44-LQFP (10x10 mm) - same | 44-LQFP (10x10 mm) - same | 44-LQFP (10x10 mm) - same |
| Flash Memory | 16 KB | 16 KB | 32 KB | 60 KB | 8 KB | 32 KB |
| RAM | 1 KB | 1 KB | 2 KB | 2 KB | 1 KB | 2 KB |
| Max CPU Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| 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 |
| I/O Pins | 38 | 38 | 38 | 38 | 38 | 38 |
| Temperature Grade | -40 C to +125 C | Marking variant, same die | -40 C to +125 C | Marking variant, same die | -40 C to +125 C | Marking variant, same die |
Key Differentiators
- Highest Flash headroom within pin-compatible S08AC family at LQFP-44 (vs MC9S08AC16CFGE)
- Code size upgrade path on identical footprint (vs MC9S08AC8MFGE)
- Cost-optimized 16 KB Flash versus larger AC60 part (vs MC9S08AC60CFGE)
Design Notes
Place a 0.1 uF decoupling capacitor as close as possible to each VDD/VSS pair (pins 8/7, 17/16, 44/43) to suppress switching noise on the internal 1.8 V core rail. Add a bulk 10 uF tantalum or ceramic capacitor near the regulator output. Keep traces short and use a ground plane beneath the LQFP-44 to minimize ground bounce during high-current GPIO toggling.
The MC9S08AC16MFGE in LQFP-44 has a junction-to-ambient thermal resistance of approximately 60-70 C/W depending on PCB copper area. For continuous operation near +125 C ambient, ensure at least 100 mm^2 of copper pour connected to the GND pins to dissipate up to 0.5 W internally. Estimated: at 40 MHz full activity, average internal dissipation is roughly 50 mW, leaving substantial thermal margin in industrial environments.
Route the analog and digital grounds separately on the PCB, joining them at a single point near the VREFL pin (31). Place the VREFH/VREFL traces away from switching signals like PWM outputs to reduce ADC noise pickup. Use guard rings or via fences around sensitive analog traces when the ADC samples sub-mV signals.
Do not leave the RESET pin floating; always connect it to VDD via a 10 kohm pull-up resistor and a 100 nF capacitor to ground for noise immunity. Avoid driving BKGD/MS pins with external signals during reset, as this can latch the MCU into debug mode. Verify the IRQ pin level at startup, since legacy NXP firmware expects it high before enabling interrupts.
Compliance Information
RoHS and REACH compliance confirmed via DigiKey/Mouser listings. Not AEC-Q100 qualified - choose MC9S08AC16CFGE automotive screening variant or an S12/S32K part for AEC-Q100 designs.
