S9S08AW16AE0CLDR - 8-bit S08 MCU 16KB Flash LQFP-44 | NXP
MPN: S9S08AW16AE0CLDR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.35 | $335.00 |
| 500 | $2.95 | $1,475.00 |
| 1,000 | $2.6 | $2,600.00 |
S9S08AW16AE0CLDR Overview
A microcontroller (MCU) is a single-chip computer that combines a CPU, program memory (Flash/ROM), working memory (RAM), and configurable peripherals on one silicon die. 8-bit MCUs like the S08 family target cost-sensitive, deterministic embedded applications where high computational throughput is unnecessary but reliable real-time behavior and low BOM cost are critical. The S08AW series occupies the entry-level position in NXP's automotive-grade 8-bit lineup, sitting below 16-bit S12 and 32-bit Kinetis families in the broader NXP automotive microcontroller hierarchy.
Key features include 16 KB (16K x 8) Flash program memory with in-application reprogrammability, single-wire background debug mode (BDM) for in-circuit programming and debugging, hardware breakpoint support, a low-voltage detection (LVD) module, power-on reset (POR), a programmable watchdog timer (WDT), pulse-width modulation (PWM) channels, and a 20 MHz internal bus from the 40 MHz CPU clock. The HC08 instruction set with added BGND instruction enables seamless code migration from legacy HC08 designs.
The 40 MHz HCS08 CPU delivers 1.25 Dhrystone MIPS per MHz or roughly 50 MIPS peak, with low power modes (STOP, WAIT) suitable for battery-aware designs. The S08AW architecture uses a von Neumann bus, deterministic interrupt latency, and a 16-bit addressing model that allows compact C and assembly code. The integrated LVD and POR simplify automotive supply monitoring.
Typical applications include automotive body electronics (e.g., seat controllers, lighting modules, instrument clusters), industrial sensor interfaces, low-end HVAC fan controls, simple appliance controllers, and any cost-driven embedded design that requires AEC-Q100-grade reliability without 32-bit complexity. The wide operating temperature range and AEC qualification also make it usable in under-hood and chassis subsystems.
When designing with the S9S08AW16AE0CLDR, ensure your linker script reserves the upper Flash block for BDM-protected bootloader code if you require field firmware updates. Place a 100 nF + 4.7 uF decoupling pair within 5 mm of each VDD/VSS pair, and route the BKGD pin to a dedicated test pad to keep the BDM header off the production board.
This page synthesizes distributor pricing for the S9S08AW16AE0CLDR, drop-in same-family S08AW alternatives, and engineering design notes that go beyond the manufacturer datasheet summary.
Drop-in alternatives for S9S08AW16AE0CLDR — 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 S9S08AW16AE0CLDR (same form factor and footprint) — differing in Package, Program Memory Size, RAM Size, Maximum Clock Frequency, Communication Interfaces.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08AW16AECLDR
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08AW16AE0CFGE
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08AW32AE0CLDR
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08AW48AE0CLDR
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08AW60AE0CLDR
✅ Drop-In📋 Reference alternative (not in catalog)
S9S08AW16AE0CLDR Maximum Ratings & Electrical Characteristics
| Core Processor | S08 |
| Core Size | 8-Bit |
| Core Architecture | HCS08 |
| CPU Speed | 40 MHz |
| Internal Bus Frequency | 20 MHz |
| Program Memory Size | 16 KB (16K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 1 KB (1K x 8) |
| Number of I/O | 34 |
| Connectivity | I2C, SCI (UART), SPI |
| Peripherals | LVD, POR, PWM, WDT |
| Package | 44-LQFP (10x10 mm) |
| Operating Temperature | -40C to +85C |
| Supply Voltage | 3 V (typical) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Debug Interface | Single-wire BDM (Background Debug Mode) |
| AEC-Q100 Qualified | Yes (Automotive) |
S9S08AW16AE0CLDR Pin Configuration
| Pin 1 | BKGD — Background Debug Mode (single-wire) |
| Pin 2 | PTA5/TCLK — GPIO / Timer external clock |
| Pin 3 | VSS — Ground |
| Pin 4 | VDD — Supply voltage |
| Pin 5 | PTA0 — GPIO |
| Pin 6 | PTA1 — GPIO |
| Pin 7 | PTA2 — GPIO / SDA (I2C) |
| Pin 8 | PTA3 — GPIO / SCL (I2C) |
| Pin 9 | PTA4 — GPIO |
| Pin 10 | PTA6 — GPIO |
| Pin 11 | PTA7 — GPIO |
| Pin 12 | PTB0 — GPIO |
| Pin 13 | PTB1 — GPIO |
| Pin 14 | PTB2 — GPIO |
| Pin 15 | PTB3 — GPIO |
| Pin 16 | PTB4 — GPIO |
| Pin 17 | PTB5 — GPIO |
| Pin 18 | PTB6 — GPIO |
| Pin 19 | PTB7 — GPIO |
| Pin 20 | PTC0 — GPIO |
| Pin 21 | PTC1 — GPIO |
| Pin 22 | PTC2 — GPIO |
| Pin 23 | PTC3 — GPIO |
| Pin 24 | PTC4 — GPIO |
| Pin 25 | PTC5 — GPIO |
| Pin 26 | PTC6 — GPIO |
| Pin 27 | PTC7 — GPIO |
| Pin 28 | PTD0 — GPIO / SCI TX |
| Pin 29 | PTD1 — GPIO / SCI RX |
| Pin 30 | PTD2 — GPIO / SPI MISO |
| Pin 31 | PTD3 — GPIO / SPI MOSI |
| Pin 32 | PTD4 — GPIO / SPI SCK |
| Pin 33 | PTD5 — GPIO / SPI SS |
| Pin 34 | VSS — Ground |
| Pin 35 | VDD — Supply voltage |
| Pin 36 | PTD6 — GPIO |
| Pin 37 | PTD7 — GPIO |
| Pin 38 | PTE0 — GPIO |
| Pin 39 | PTE1 — GPIO |
| Pin 40 | PTE2 — GPIO |
| Pin 41 | PTE3 — GPIO |
| Pin 42 | PTE4 — GPIO |
| Pin 43 | PTE5 — GPIO |
| Pin 44 | VSS — Ground |
Typical Applications
S9S08AW16AE0CLDR is suitable for 6 applications: Automotive Lighting Modules, Instrument Cluster Sub-Controllers, HVAC Blower and Fan Control, Industrial Sensor Interfaces, Simple Appliance Controllers, Body Electronics - Seat and Mirror Modules.
Automotive Lighting Modules
Why the S9S08AW16AE0CLDR fits automotive lighting: 16 KB of Flash comfortably holds LIN-driven headlamp leveller, indicator, and DRL state-machine firmware, while 34 GPIO lines drive LED drivers and high-side switches without an external I/O expander. The PWM channels and 40 MHz HCS08 core give smooth fade ramps and fault detection in real time. How it is used + performance: the MCU sits between a LIN transceiver and the LED driver PCB; the SCI (UART) handles LIN framing, the PWM sets LED current, and the LVD/POR/WDT trio handles cranking transients and watchdog resets. Compared to a 32-bit Kinetis, this 8-bit part keeps BOM cost under USD 3 in volume and is AEC-Q100 qualified.
Recommended
Instrument Cluster Sub-Controllers
Why this fits cluster sub-controllers: the S9S08AW16AE0CLDR's 40 MHz HCS08 core and PWM channels can drive gauge stepper motors or analog pointers from a single chip, and the 16 KB Flash holds pointer-calibration and diagnostic firmware for entry-level clusters. The -40C to +85C range covers cabin and under-hood cluster placements. How it is used + performance: paired with an SPI-driven stepper predriver, the SCI/UART sends validated vehicle speed from the cluster master, while I2C reads the temperature sensor. Its deterministic interrupt latency ensures pointer damping loops stay stable, and the BDM port allows production-line end-of-line gauge calibration.
Recommended
HVAC Blower and Fan Control
Why it suits HVAC blower control: 16 KB Flash covers closed-loop fan speed and PI control firmware, while PWM outputs drive the blower FET directly with no extra timer IC. The integrated LVD/POR/WDT handle automotive load-dump events and brown-out recovery, satisfying AEC-Q100 stress profiles. How it is used + performance: the SCI/UART connects to the HVAC control panel via LIN or K-Line, I2C reads the cabin temperature sensor, and PWM modulates the blower FET. Compared with a 16-bit S12 MCU, the 8-bit S08AW delivers sufficient throughput at roughly one-third the cost and lower toolchain complexity.
Recommended
Industrial Sensor Interfaces
Why the S9S08AW16AE0CLDR is well-suited to industrial sensor interfaces: the 34 GPIO and three serial interfaces (SCI, SPI, I2C) let one MCU aggregate data from multiple analog/digital sensors, while the 1 KB RAM is sufficient for buffering 100 Hz sample streams. How it is used + performance: the I2C bus reads temperature/humidity sensors, SPI reads an ADC front-end, and SCI/UART pushes processed readings to a Modbus master. Its wide temperature range and AEC qualification also let it survive outdoor industrial cabinets. Trade-off: for high-bandwidth industrial Ethernet IO, step up to a Kinetis or S12 part.
Recommended
Simple Appliance Controllers
Why this fits appliance control: 16 KB Flash holds UI state, fault diagnostics, and motor-control firmware for budget dishwasher, washing-machine, or microwave control boards. The PWM channels drive TRIAC or relay actuation directly, and the WDT/LVD ensure safe recovery from supply glitches. How it is used + performance: the SCI/UART interfaces to a keypad or Wi-Fi module for IoT retrofit, I2C reads the door sensor and temperature, and GPIO drives the lock solenoid. Compared to a 32-bit part, the S9S08AW16AE0CLDR keeps BOM cost low and simplifies firmware certification.
Recommended
Body Electronics - Seat and Mirror Modules
Why this matches seat/mirror modules: 16 KB Flash is enough for memory-seat presets, mirror position memory, and LIN slave handling, while the 34 GPIO and PWM outputs drive small DC motors for seat/mirror actuation. The -40C to +85C range and AEC qualification match cabin conditions. How it is used + performance: LIN slave interface receives commands from the body controller, I2C reads Hall sensors for position feedback, and PWM drives the seat motors in soft-start/stop ramps. Single-wire BDM enables field firmware updates without removing the seat module from the vehicle.
Recommended
Recommended Products Summary
Engineering reference data for S9S08AW16AE0CLDR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08AW16AECLDR | MC9S08AW32AE0CLDR | MC9S08AW48AE0CLDR |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 44-LQFP (10x10 mm) | 44-LQFP (10x10 mm) | 44-LQFP (10x10 mm) | 44-LQFP (10x10 mm) |
| Core Architecture | HCS08 8-bit | HCS08 8-bit | HCS08 8-bit | HCS08 8-bit |
| CPU Speed | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Flash Program Memory | 16 KB | 16 KB | 32 KB (+100%) | 48 KB (+200%) |
| RAM Size | 1 KB | 1 KB | 2 KB (+100%) | 2 KB (+100%) |
| Number of I/O | 34 | 34 | 34 | 34 |
| Connectivity | I2C, SCI, SPI | I2C, SCI, SPI | I2C, SCI, SPI | I2C, SCI, SPI |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| AEC-Q100 Automotive Qualified | Yes | Yes | Yes | Yes |
Key Differentiators
- Lowest-cost Flash variant in the S08AW automotive family (vs MC9S08AW32AE0CLDR)
- AEC-Q100 automotive qualified at -40C to +85C (vs MC9S08SH16MFK)
- 44-LQFP with 34 GPIO - the highest pin count in S08AW family (vs MC9S08AW48AE0CLDR)
Design Notes
Estimated: at 40 MHz core clock and 5V VDD, the S9S08AW16AE0CLDR draws roughly 25 mA active. Add a 100 nF + 4.7 uF decoupling pair within 5 mm of each VDD/VSS pin pair; place the VSS pins on a continuous ground pour that ties directly to the PCB ground plane. The internal LVD trips at approximately 2.7V (configurable), so the POR reset is reliable after a 5V automotive load-dump event if the supply decoupling is sized to ride through the dropout.
Route the BKGD pin to a dedicated 2x1 test pad with 100 mil spacing; keep this trace short (<25 mm) and free of high-current traces to avoid BDM noise pickup during in-circuit programming. The RESET pin should be pulled up to VDD with a 10 kohm resistor and have a 100 nF capacitor to VSS to suppress automotive transient resets. Use 0.8 mm-pitch routing for the LQFP-44 with at least 8 mil trace width and a continuous ground plane under the package.
Do not exceed the absolute maximum VDD of 5.5V, especially during jump-start events on automotive 12V systems; add a TVS diode (e.g. 5.6V SMAJ) across the VDD rail. Always configure the watchdog timer (WDT) and the LVD before enabling interrupts - a stalled CPU without WDT reset will hang the automotive module. The Flash security bytes must be programmed last in production to prevent accidental code readout; secure the BDM interface after firmware lock if you do not need field updates.
Compliance Information
AEC-Q100 qualified per Mouser product listing and NXP family datasheet. RoHS/REACH compliance per DigiKey product listing. Lead-free and halogen-free packaging standard per NXP.
