S9S08AW32E5CFGE - 8-bit 40MHz 32KB Flash Automotive MCU | NXP
MPN: S9S08AW32E5CFGE ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.42 | $5.42 |
| 10 | $4.88 | $48.80 |
| 100 | $4.35 | $435.00 |
| 500 | $3.92 | $1,960.00 |
| 1,000 | $3.51 | $3,510.00 |
S9S08AW32E5CFGE Overview
An 8-bit microcontroller (MCU) is a single-chip microprocessor optimized for embedded control tasks where low cost, deterministic interrupt response and simple peripheral integration outweigh raw computational throughput. The S08 core sits in NXP's portfolio between the legacy HC08 and the higher-end ColdFire V1 architectures, and is supported by CodeWarrior HC(S)08 / Eclipse-based IDEs plus the Processor Expert component library. Within the broader taxonomy, this part is a microcontroller -> 8-bit MCU -> HCS08 family member -> automotive-grade variant.
Key features include 32 KB FLASH (32K x 8), 2 KB RAM, an integrated internal bus clock with a 40 MHz maximum CPU frequency, multiple timer/PWM modules (TPM), an analog-to-digital converter (ADC), serial communication interfaces (SCI/SPI/IIC), and a robust set of I/O ports. The device supports operation from 2.7 V to 5.5 V with brown-out detection and multiple low-power modes (Stop, Wait, Run). On-chip BGND and debug interfaces enable non-intrusive in-circuit programming using standard NXP BDM tools.
The S08 core implements a Von Neumann architecture with a 16-bit address space, hardware stack pointer, and the BSET/BCLR bit-manipulation instructions common in NXP/Freescale MCUs. The 40 MHz bus clock yields a minimum instruction cycle of 25 ns and ~ 1.4 MIPS per MHz, suiting event-driven control loops with predictable latency. The internal voltage regulator and clock source reduce external BOM, while FLASH security bits protect firmware IP.
Typical applications include automotive body controllers, instrument clusters, HVAC control modules, lighting controllers, seat and mirror modules, and small industrial sensor nodes. The HCS08 instruction set and peripheral set were designed for deterministic real-time control with minimal software overhead, making the part attractive for cost-sensitive automotive ECUs. The wide operating voltage range and extended AEC-Q100 temperature range support 12 V automotive bus environments.
When designing with this device, budget carefully between CPU clock and ADC acquisition time, and ensure the supply decoupling network follows NXP application note AN2491 recommendations. Use the BDM interface for development and field firmware updates; route BKGD and RESET carefully to enable production programming without rework. Pin count is 44 in LQFP-44; plan PCB layout with adequate thermal copper even though quiescent dissipation is modest. This page consolidates distributor pricing, drop-in alternatives, and application guidance that complements the manufacturer datasheet.
Drop-in alternatives for S9S08AW32E5CFGE — 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 S9S08AW32E5CFGE (same form factor and footprint) — differing in Package, Core, Debug Interface, Operating Temperature Range, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
S9S08AW60E5MFGE
✅ Drop-In✓ In Stock
$6.05 / Unit
View Datasheet →MC9S08AW32CFGE
✅ Drop-In✓ In Stock
$2.86 / Unit
View Datasheet →MC9S08AC32CFGER
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08AW32MFGE
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.15 / Unit
View Datasheet →MC9S08AW32VFGE
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.3 / Unit
View Datasheet →S9S08AW32E5MPUE
✅ Drop-In✓ In Stock
$3.95 / Unit
View Datasheet →S9S08AW32E5CFGE Maximum Ratings & Electrical Characteristics
| Core | HCS08 (S08) 8-bit |
| Maximum CPU Frequency | 40 MHz |
| Program Memory (FLASH) | 32 KB (32K x 8) |
| RAM | 2 KB |
| Package | 44-LQFP (10x10 mm) |
| Pin Count | 44 |
| Supply Voltage (VDD) | 2.7 V to 5.5 V |
| Operating Temperature Grade | Industrial / Automotive (AEC-Q100) |
| Timers/PWM (TPM) | On-chip TPM modules |
| Communication Interfaces | SCI (UART), SPI, IIC |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| MSL Level | MSL3 (per JEDEC J-STD-020) |
| Qualification | AEC-Q100 (automotive, "S9" prefix) |
| Development Tools | CodeWarrior HC(S)08, P&E BDM/Cyclone, USBDM |
S9S08AW32E5CFGE Pin Configuration
| Pin 1 | PTB5 — Port B I/O bit 5 (TPM channel) |
| Pin 2 | PTB4 — Port B I/O bit 4 (TPM channel) |
| Pin 3 | PTB3 — Port B I/O bit 3 (TPM channel) |
| Pin 4 | PTB2 — Port B I/O bit 2 (TPM channel) |
| Pin 5 | PTB1 — Port B I/O bit 1 |
| Pin 6 | PTB0 — Port B I/O bit 0 |
| Pin 7 | VDD — Supply voltage (2.7 V to 5.5 V) |
| Pin 8 | VSS — Ground |
| Pin 9 | PTA5 — Port A I/O bit 5 |
| Pin 10 | PTA4 — Port A I/O bit 4 |
| Pin 11 | PTA3 — Port A I/O bit 3 |
| Pin 12 | PTA2 — Port A I/O bit 2 |
| Pin 13 | PTA1 — Port A I/O bit 1 |
| Pin 14 | PTA0 — Port A I/O bit 0 |
| Pin 15 | BKGD — Background Debug Mode pin (BDM) |
| Pin 16 | RESET — Reset input (active low) |
| Pin 17 | PTC5 — Port C I/O bit 5 |
| Pin 18 | PTC4 — Port C I/O bit 4 |
| Pin 19 | PTC3 — Port C I/O bit 3 |
| Pin 20 | PTC2 — Port C I/O bit 2 |
| Pin 21 | PTC1 — Port C I/O bit 1 |
| Pin 22 | PTC0 — Port C I/O bit 0 |
| Pin 23 | PTD5 — Port D I/O bit 5 |
| Pin 24 | PTD4 — Port D I/O bit 4 |
| Pin 25 | PTD3 — Port D I/O bit 3 |
| Pin 26 | PTD2 — Port D I/O bit 2 |
| Pin 27 | PTD1 — Port D I/O bit 1 |
| Pin 28 | PTD0 — Port D I/O bit 0 |
| Pin 29 | PTE5 — Port E I/O bit 5 |
| Pin 30 | PTE4 — Port E I/O bit 4 |
| Pin 31 | PTE3 — Port E I/O bit 3 |
| Pin 32 | PTE2 — Port E I/O bit 2 |
| Pin 33 | PTE1 — Port E I/O bit 1 |
| Pin 34 | PTE0 — Port E I/O bit 0 |
| Pin 35 | VSS — Ground |
| Pin 36 | VDD — Supply voltage (2.7 V to 5.5 V) |
| Pin 37 | PTF5 — Port F I/O bit 5 |
| Pin 38 | PTF4 — Port F I/O bit 4 |
| Pin 39 | PTF3 — Port F I/O bit 3 |
| Pin 40 | PTF2 — Port F I/O bit 2 |
| Pin 41 | PTF1 — Port F I/O bit 1 |
| Pin 42 | PTF0 — Port F I/O bit 0 |
| Pin 43 | PTG5 — Port G I/O bit 5 |
| Pin 44 | PTG4 — Port G I/O bit 4 |
Typical Applications
S9S08AW32E5CFGE is suitable for 7 applications: Automotive Body Control Module (BCM), Instrument Cluster Indicator Driver, HVAC Control Module, Automotive Lighting Controllers (DRL / Tail), Seat and Mirror Control Module, Industrial Sensor / Smart-Sensor Node, Wiper and Washer Pump Controller.
Automotive Body Control Module (BCM)
Body control modules aggregate vehicle-wide loads such as exterior lighting, wipers, horn and central locking using a single MCU. The S9S08AW32E5CFGE fits this role with its 32 KB FLASH supporting J1939 or LIN master stacks, 2 KB RAM handling scan tables for switches and lamps, and the AEC-Q100 S9 qualification supporting underhood temperatures. The on-chip ADC reads lighting-current sense resistors and the TPM generates 100 Hz to 1 kHz PWM for dimming or indicator flashing. Designers should budget RAM and FLASH carefully when adding diagnostic firmware such as UDS over CAN.
Recommended
Instrument Cluster Indicator Driver
Entry-level clusters need a deterministic MCU to drive turn-signal indicators, gear position displays and warning telltales. The S9S08AW32E5CFGE's 40 MHz S08 core provides ample throughput for indicator patterns and fault-latching logic, while the AEC-Q100 grade ensures reliability behind the dashboard. The device's timers generate precise blink rates and PWM dimming for telltales, and on-chip ADC reads battery voltage for low-voltage warning. Pair with a NXP LIN SBC to coordinate cluster power sequencing and support sleep currents below 200 uA for park-mode operation.
Recommended
HVAC Control Module
HVAC modules demand rugged MCUs with strong timer, ADC and PWM performance for blower speed, mode-door actuation and temperature closed loops. The S9S08AW32E5CFGE provides a PWM-capable TPM for driving blower MOSFETs, a 10-bit ADC for NTC thermistor reading, and SCI/SPI for I/O expansion through SBC and driver companions. AEC-Q100 qualification supports underhood-mount or cabin-over-temperature environments. Code size for typical HVAC state machines with diagnostics fits within 32 KB FLASH, leaving margin for future feature additions.
Recommended
Automotive Lighting Controllers (DRL / Tail)
LED daytime running lights and rear lamp clusters need precise PWM and protection handling without adding digital complexity. The S9S08AW32E5CFGE drives high-side FETs through its TPM PWM channels, monitors LED current via ADC, and runs safety algorithms such as single-LED-outage detection. AEC-Q100 qualification makes it suitable for exterior lamp modules mounted near heat sources, and the LQFP-44 (10x10) outline enables compact lamp-driver PCBs. Use the internal COP and LVD for safe behavior under battery transient conditions.
Recommended
Seat and Mirror Control Module
Power seat and mirror modules command DC motors for adjustment and memory recall. The S9S08AW32E5CFGE handles multiple H-bridge drivers via GPIOs with PWM for motor-speed sequencing, while 2 KB RAM stores user preference profiles. AEC-Q100 qualification supports under-seat or door-mount thermal environments. BDM debug makes field firmware upgrades tractable, and the 32 KB FLASH envelope supports memory-recall and diagnostic UDS/KWP2000 messaging if a LIN SBC is in the network.
Recommended
Industrial Sensor / Smart-Sensor Node
Cost-sensitive industrial nodes benefit from an 8-bit MCU with on-chip ADC and serial interfaces. The S9S08AW32E5CFGE interfaces to industrial sensors over SPI or IIC, runs firmware for calibration and linearization, and transmits results through SCI to a higher-level controller. The wide 2.7 V to 5.5 V supply range simplifies 24 V-bus-powered designs when paired with a switching regulator or linear dropper. Internal low-power Stop and Wait modes support battery-driven periodic sampling.
Recommended
Wiper and Washer Pump Controller
Wiper controllers need predictable timer-driven PWMs for intermittent, low- and high-speed modes, plus inputs for park position and rain sensor. The S9S08AW32E5CFGE handles wiper interval timing, washer pump activation, and park-position sensing through its GPIO and TPM. AEC-Q100 grade and the industrial temperature range cover windshield-top environments. Choose 44-LQFP for the pin budget that allows brake-side signal multiplexing and LIN bus connectivity if required.
Recommended
Recommended Products Summary
Engineering reference data for S9S08AW32E5CFGE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | S9S08AW60E5MFGE | MC9S08AW32CFGE | MC9S08AC32CFGER | S9S08AW32E5MPUE |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 44-LQFP (10x10) | 44-LQFP (10x10) - same | 44-LQFP (10x10) - same | 44-LQFP (10x10) - same | 44-LQFP (10x10) - same |
| Core | HCS08 8-bit | HCS08 8-bit | HCS08 8-bit | HCS08 8-bit (AC family) | HCS08 8-bit |
| Max CPU Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| FLASH Memory | 32 KB | 60 KB (+87%) | 32 KB (same) | 32 KB (same) | 32 KB (same) |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| AEC-Q100 Qualification | Yes (S9 prefix) | Yes | No (industrial) | No (industrial) | Yes |
| Approx. Unit Price @ qty 100 | USD 4.35 | USD 5.60 (approx) | USD 4.10 (approx) | USD 4.20 (approx) | USD 4.50 (approx) |
Key Differentiators
- AEC-Q100 qualification with 32 KB FLASH in 44-LQFP (vs MC9S08AW32CFGE)
- 32 KB FLASH tuned for typical automotive BCM firmware (vs S9S08AW60E5MFGE)
- Deterministic HCS08 core for real-time control (vs MC9S08AC32CFGER)
Design Notes
Decouple VDD/VSS pairs locally with a 100 nF X7R plus 4.7 uF bulk placed within 2 mm of the pins. The S08AW VDD/VSS pins sit on multiple sides of the LQFP (per NXP AN2491); populate every VDD/VSS pair for EMC robustness. Latchup protection on 12 V automotive rails requires TVS such as SMAJ16A plus a series ferrite, and the LQFP thermal pad should be tied to a copper pour at least 1 square inch if the design dissipates above 0.5 W.
Route BKGD and RESET traces as short as possible (under 50 mm) to ease production programming. Place an external pull-up on RESET (typically 10 kohm to VDD) and a small capacitor (10-100 nF) to ground for clean reset behaviour in noisy automotive environments. Keep the high-current motor and LED PWM signals on inner layers away from BKGD and analog ADC inputs.
The S08AW ADC has moderate source-impedance requirements; use 1 kohm or less combined upstream of ATD channels for accurate 10-bit conversions. ADC reference (VREF) decoupling matters; add 100 nF plus 4.7 uF near VREF and VRH pins. For TPM-driven PWM, ensure the FET gate-drive trace is shorter than 25 mm and avoid adjacent shared-ground returns that couple switching noise into analog inputs.
Verify the FLASH security bytes (FSEC) are correctly configured before locking firmware; if FSEC is mass-erased and locked you cannot reprogram without a mass erase. Watch the watchdog (COP) timeout in low-power modes; enable proper servicing during Stop or Wait transitions. Do not exceed absolute-maximum VDD of 6 V or apply reverse polarity - a series Schottky at the supply input is recommended for harsh 12 V environments.
Compliance Information
AEC-Q100 automotive qualification implied by S9 prefix per NXP ordering information; RoHS compliant per distributor data on DigiKey; halogen-free status not explicitly listed in distributor snippets.
