S9S08AW32E5MFGE - 8-bit MCU, 32KB Flash, 40MHz, Automotive | NXP
MPN: S9S08AW32E5MFGE ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.95 | $6.95 |
| 10 | $6.32 | $63.20 |
| 100 | $5.71 | $571.00 |
| 500 | $5.05 | $2,525.00 |
| 1,000 | $4.42 | $4,420.00 |
| 3,000 | $3.85 | $11,550.00 |
S9S08AW32E5MFGE Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash), working memory (RAM), and configurable peripheral blocks (timers, ADC, communication ports). The 8-bit class occupies the low-power, deterministic, low-cost end of the MCU market and remains widely used in body electronics, sensor nodes, and white-goods control where 32-bit performance is unnecessary. Within the broader taxonomy, the S9S08AW32 belongs to: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor.
Key features include 32KB of embedded Flash program memory, 2KB of RAM, four on-chip 16-bit timers, an 8-channel 10-bit ADC, PWM outputs, and a hardware watchdog timer (WDT). Communication is provided through one SCI (UART), one SPI, and one I²C port. The integrated low-voltage detect (LVD) and power-on reset (POR) blocks ensure safe startup and brownout behavior in noisy automotive environments. The device runs from a 2.7 V to 5.5 V supply and draws only a few milliamperes at full CPU activity.
Architecturally, the S9S08AW32 uses the Freescale-developed HCS08 CPU core with an enhanced instruction set over the legacy HC08, including multiply and divide instructions. The 40 MHz bus rate delivers roughly 20 MIPS, sufficient for real-time control loops at typical automotive PWM and CAN-equivalent signaling rates. Background debug mode (BDM) is supported through a single-wire interface, allowing non-intrusive in-circuit programming and debug with the standard NXP toolchain.
Typical applications include automotive body controllers, HVAC actuators, instrument clusters, sensor conditioning nodes, and small motor-control stages for door modules or fan drivers. The part is also found in industrial white-goods control boards, low-end human-machine interfaces, and battery-powered remote-keyless entry transmitters where the wide temperature range and integrated analog make board design straightforward.
When designing with this device, ensure the main supply decoupling is sized correctly for the 40 MHz switching current and that unused I/O pins are configured as outputs or pulled to defined states to avoid unnecessary supply current. The integrated voltage regulator simplifies single-supply designs but the analog supply (VDDA) must be filtered separately from the digital supply for best ADC performance. This page combines authoritative distributor pricing, drop-in replacement candidates, and design guidance not consolidated in the original manufacturer datasheet.
Drop-in alternatives for S9S08AW32E5MFGE — 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 S9S08AW32E5MFGE (same form factor and footprint) — differing in Core, Debug Interface, Operating Temperature Range, Timers, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
S9S08AW60E5MFGE
✅ Drop-In✓ In Stock
$6.05 / Unit
View Datasheet →S9S08AW32E5MPUE
✅ Drop-In✓ In Stock
$3.95 / Unit
View Datasheet →MC9S08AW32MFGE
✅ Drop-In✓ In Stock
$3.15 / Unit
View Datasheet →MC9S08AW32VFGE
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.3 / Unit
View Datasheet →S9S08AW32E5MFGE Maximum Ratings & Electrical Characteristics
| Core | S08 (HCS08) |
| Core Size | 8-bit |
| Program Memory | 32 KB (32K x 8) Flash |
| RAM Size | 2 KB (2K x 8) |
| Maximum CPU Frequency | 40 MHz |
| Supply Voltage | 2.7 V to 5.5 V |
| Operating Temperature | -40 °C to +125 °C (Automotive Grade) |
| Number of I/O | 34 |
| Package | 44-LQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Connectivity | I²C, SCI (UART), SPI |
| Peripherals | LVD, POR, PWM, WDT |
| Debug Interface | Background Debug Mode (BDM), single-wire |
| MSL Level | 3 (per JEDEC J-STD-020) |
| RoHS Status | Compliant (lead-free) |
S9S08AW32E5MFGE Pin Configuration
| Pin 1 | PTD0/TPM1CH0 — Port D I/O / Timer/PWM channel |
| Pin 2 | PTD1/TPM1CH1 — Port D I/O / Timer/PWM channel |
| Pin 3 | PTD2/TPM1CH2 — Port D I/O / Timer/PWM channel |
| Pin 4 | PTD3/TPM1CH3 — Port D I/O / Timer/PWM channel |
| Pin 5 | VDD — Power supply (2.7 V to 5.5 V) |
| Pin 6 | VSS — Ground |
| Pin 7 | PTD4 — Port D I/O |
| Pin 8 | PTD5 — Port D I/O |
| Pin 9 | BKGD/MS — Background Debug Mode / Mode Select |
| Pin 10 | RESET — External reset input (active low) |
| Pin 11 | PTB7 — Port B I/O |
| Pin 12 | PTB6 — Port B I/O |
| Pin 13 | PTB5 — Port B I/O |
| Pin 14 | PTB4 — Port B I/O |
| Pin 15 | PTC3/SDA — Port C I/O / I²C SDA |
| Pin 16 | PTC2/SCL — Port C I/O / I²C SCL |
| Pin 17 | PTC1 — Port C I/O |
| Pin 18 | PTC0 — Port C I/O |
| Pin 19 | PTE0/TxD — Port E I/O / SCI transmit |
| Pin 20 | PTE1/RxD — Port E I/O / SCI receive |
| Pin 21 | PTE2 — Port E I/O |
| Pin 22 | PTE3 — Port E I/O |
| Pin 23 | PTF0 — Port F I/O |
| Pin 24 | PTF1 — Port F I/O |
| Pin 25 | PTF2 — Port F I/O |
| Pin 26 | PTF3 — Port F I/O |
| Pin 27 | VDD — Power supply (2.7 V to 5.5 V) |
| Pin 28 | VSS — Ground |
| Pin 29 | PTA7/ADP7 — Port A I/O / ADC channel |
| Pin 30 | PTA6/ADP6 — Port A I/O / ADC channel |
| Pin 31 | PTA5/ADP5 — Port A I/O / ADC channel |
| Pin 32 | PTA4/ADP4 — Port A I/O / ADC channel |
| Pin 33 | PTA3/ADP3 — Port A I/O / ADC channel |
| Pin 34 | PTA2/ADP2 — Port A I/O / ADC channel |
| Pin 35 | PTA1/ADP1 — Port A I/O / ADC channel |
| Pin 36 | PTA0/ADP0 — Port A I/O / ADC channel |
| Pin 37 | PTG0 — Port G I/O |
| Pin 38 | PTG1 — Port G I/O |
| Pin 39 | PTG2 — Port G I/O |
| Pin 40 | PTG3 — Port G I/O |
| Pin 41 | PTH0/MISO — Port H I/O / SPI MISO |
| Pin 42 | PTH1/MOSI — Port H I/O / SPI MOSI |
| Pin 43 | PTH2/SPSCK — Port H I/O / SPI clock |
| Pin 44 | PTH3/SS — Port H I/O / SPI slave select |
Typical Applications
S9S08AW32E5MFGE is suitable for 6 applications: Automotive Body Controller, HVAC Actuator Control, Instrument Cluster Indicator Logic, Remote Keyless Entry (RKE) Transmitter, Industrial Sensor Conditioning Module, Small Appliance White-Goods Controller.
Automotive Body Controller
The S9S08AW32E5MFGE's 32 KB Flash, 40 MHz S08 core, and AEC-Q100 automotive qualification make it well suited for body control modules that aggregate switches, lamps, and door-latch drivers. Its 34 I/O pins can scan a 4x8 switch matrix and drive several MOSFET gate drivers via the PWM outputs. Integrated LVD and POR blocks protect the module during crank-to-run voltage dropouts, while the -40 to +125 °C temperature grade supports under-hood and cabin environments. Placing the MCU between the battery rail and a 5V regulator on the PCB, the integrated voltage regulator simplifies single-supply design.
Recommended
HVAC Actuator Control
HVAC blend-door and blower-speed actuators demand deterministic PWM and analog feedback, which the S9S08AW32E5MFGE's four 16-bit timers and 8-channel 10-bit ADC address directly. The 32 KB Flash holds lookup tables for non-linear damper curves while 2 KB RAM stores run-time setpoints. AEC-Q100 qualification lets the same firmware run in cabin modules that see ambient swings of -40 to +125 °C. With a single 5 V rail and integrated regulator, the MCU drives opto-coupled triac gates without extra analog conditioning.
Recommended
Instrument Cluster Indicator Logic
Instrument clusters need fast PWM dimming for backlight and gauge needles, which the S9S08AW32E5MFGE delivers through its hardware PWM channels running at 40 MHz with sub-microsecond resolution. The 34 I/O can multiplex 7-segment displays and warning lamps, while the SPI port drives a graphics companion ASIC. 32 KB of Flash supports vector-driven animation tables and on-chip diagnostics. AEC-Q100 qualification aligns with cluster thermal requirements, and the integrated voltage regulator minimizes board area behind the cluster bezel.
Recommended
Remote Keyless Entry (RKE) Transmitter
Battery-powered RKE fobs need sub-mA average draw, which the S9S08AW32E5MFGE achieves through its S08 core's low-power wait and stop modes with peripheral wake-up on GPIO edges. The SCI/UART and a software-defined FSK encoder use the 40 MHz bus for sub-100 µs button-debounce routines. 32 KB Flash stores rolling-code algorithms and encryption keys, while 2 KB RAM is sufficient for transient transmit buffers. AEC-Q100 temperature support makes the same fob platform usable across global climate regions.
Recommended
Industrial Sensor Conditioning Module
Industrial 4-20 mA loop and bridge-sensor conditioning boards need a deterministic MCU with strong analog integration; the S9S08AW32E5MFGE's 8-channel 10-bit ADC, 40 MHz CPU, and 32 KB Flash support ratiometric measurement of strain-gauge and RTD sensors. The integrated regulator accepts 24 V loop power after an external LDO. 34 I/O can route SPI to an isolated 4-20 mA DAC and UART to a local HMI. -40 to +125 °C operation tolerates unheated cabinets, and AEC-Q100 qualification is a bonus for rail-side deployments.
Recommended
Small Appliance White-Goods Controller
White-goods controllers such as dishwasher control boards or washing-machine front panels benefit from the S9S08AW32E5MFGE's 32 KB Flash (enough for menu trees and fault logs), 40 MHz CPU for triac zero-cross timing, and 34 I/O for keypad/LED multiplexing. The integrated regulator accepts a rectified 5 V from a small offline flyback, reducing BOM cost. The -40 to +125 °C temperature grade survives appliance hot zones near the heater element. UART-to-bluetooth modules can ride on the SCI port for IoT retrofit products.
Recommended
Recommended Products Summary
Engineering reference data for S9S08AW32E5MFGE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | S9S08AW60E5MFGE | S9S08AW32E5MPUE | MC9S08AW32MFGE | MC9S08AW32VFGE |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 44-LQFP (10x10) | 44-LQFP (10x10) | 44-LQFP (10x10) | 44-LQFP (10x10) | 44-LQFP (10x10) |
| Core | S08 8-bit | S08 8-bit | S08 8-bit | S08 8-bit | S08 8-bit |
| Program Flash | 32 KB | 60 KB | 32 KB | 32 KB | 32 KB |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| Max CPU Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| I/O Pins | 34 | 34 | 34 | 34 | 34 |
| Automotive Grade | Yes (AEC-Q100) | Yes (AEC-Q100) | Yes (AEC-Q100) | Yes (legacy Freescale ordering) | Yes (legacy Freescale ordering) |
| Connectivity | I²C, SCI, SPI | I²C, SCI, SPI | I²C, SCI, SPI | I²C, SCI, SPI | I²C, SCI, SPI |
Key Differentiators
- Higher Flash density with identical footprint and peripheral set (vs S9S08AW60E5MFGE)
- Legacy Freescale compatibility for existing firmware (vs MC9S08AW32MFGE)
- Automotive temperature qualification across the family (vs S9S08AW32E5MPUE)
Design Notes
Place a 100 nF ceramic decoupling capacitor as close as possible to every VDD/VSS pair on the 44-LQFP, and a single 10 µF bulk capacitor at the board supply entry. The integrated regulator generates the core voltage internally, but the analog VDDA pin must be filtered separately from VDD to avoid ADC noise coupling during PWM switching events. For noisy automotive rails, an external TVS diode plus series ferrite on the VDD trace is recommended.
Route the BKGND/MS signal as a single-ended trace to a dedicated debug-header pin with no stubs. Keep the RESET trace short and add an external 10 kΩ pull-up to VDD if the application is in a high-noise environment. The 44-LQFP exposed-pad variant is not used on this package; standard 44-LQFP lead soldering profiles (JEDEC J-STD-020 MSL-3) apply, and peak reflow temperature should not exceed 260 °C.
Always configure unused I/O pins as outputs or enable the internal pull to a defined state; floating inputs can draw extra supply current and may falsely trigger the LVD/POR block at startup. When migrating from the legacy MC9S08AW32 ordering code to the S9S08AW32E5MFGE, regenerate the project header files because the peripheral interrupt vector addresses differ slightly between the two silicon revisions.
Compliance Information
AEC-Q100 qualified per automotive-grade designation in part number; RoHS and REACH compliant per NXP product page. Halogen-free status not confirmed in the verified web data.
