S9S08SC4E0MTG574 - 8-Bit S08 MCU, 4KB Flash, TSSOP-16 | NXP
MPN: S9S08SC4E0MTG574 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.74 | $37.40 |
| 100 | $3.22 | $322.00 |
| 500 | $2.7 | $1,350.00 |
| 1,000 | $2.25 | $2,250.00 |
S9S08SC4E0MTG574 Overview
What is an 8-bit microcontroller? An 8-bit MCU is an integrated circuit that executes software instructions using an internal data path width of eight bits, controlled by firmware stored in non-volatile memory (Flash or ROM). The S08 family, based on the legacy HC08 instruction set, extends the HC08 with the BGND (background debug) instruction, simplifying in-circuit programming and on-chip debug. Within the broader taxonomy: microcontroller -> embedded MCU -> 8-bit MCU -> S08 family -> S08SC sub-family (feature-reduced version of S08SG). It belongs to the power-conscious small-footprint tier intended for body controllers in vehicles and white-goods control boards.
Key features include 4 KB of on-chip Flash with read, program, and erase operations supported across the full operating voltage and temperature range; multiple communication interfaces (SCI, SPI, and I2C); an integrated ACMP module; and a 16-pin TSSOP package measuring 4.40 mm wide with 0.65 mm pitch. The device also incorporates a robust set of timers (TPM, MTIM), a 10-bit or 12-bit ADC (variant-dependent), and on-chip clock generation with internal reference. Hardware multiply and divide instructions enable efficient integer arithmetic for control loops.
Architecturally, the S08SC4 MCU is a feature-reduced version of the S08SG4 family, sharing the same HCS08 CPU and tool chain for software reuse. The advanced low-power design supports a wide range of stop and wait modes, allowing the device to wake on interrupts from internal peripherals or external pins. According to the NXP MC9S08SC4 datasheet, the integrated voltage regulator with POR (power-on reset) and COP (computer operating properly) watchdog enhances system reliability across automotive and industrial temperature ranges of -40 C to +125 C.
Typical applications include automotive body controllers (RKE receivers, mirror adjusters, lighting controllers, HVAC flap motors), low-cost white-goods controllers (washing machine user interfaces, induction cooktop controllers), industrial sensor interface boards, and battery management peripherals in 5 V-rail subsystems. The TSSOP-16 footprint enables placement on a single-layer PCB with limited board real estate.
When designing with this device, keep firmware investment in mind. Code written for the S08SC4 builds on the standard CodeWarrior IDE and the HC(S)08 toolchain, supporting easy migration to larger S08SG, S08MM, or S12 variants in the same NXP family when memory or peripheral requirements grow.
This page synthesizes distributor pricing (DigiKey, Mouser, Octopart, JLCPCB), drop-in pin-compatible alternatives, and practical PCB design notes that consolidate information typically scattered across the manufacturer datasheet and forum threads.
Drop-in alternatives for S9S08SC4E0MTG574 — 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 S9S08SC4E0MTG574 (same form factor and footprint) — differing in Core, Operating Temperature, Package, RAM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
S9S08SH4MFK
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08LL36CLK
✅ Drop-In✓ In Stock
$3.84 / Unit
View Datasheet →MC9S08QD4CSC
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →S9S08SC4E0MTG574 Maximum Ratings & Electrical Characteristics
| Core | S08 (HCS08) 8-bit CPU |
| CPU Frequency | 40 MHz |
| Bus Frequency | 20 MHz |
| Program Memory (Flash) | 4 KB |
| RAM | 128 B |
| Supply Voltage (Vcc/Vdd) | 4.5 V to 5.5 V |
| Package | 16-TSSOP (0.173", 4.40 mm width, 0.65 mm pitch) |
| Pin Count | 16 |
| Operating Temperature | -40 C to +125 C |
| Mounting Type | Surface Mount |
| Communication Interfaces | SCI (UART), SPI, I2C |
| Timers | TPM, MTIM |
| Analog Comparator (ACMP) | Yes |
| Watchdog | COP watchdog with separate clock source option |
| RoHS Status | Compliant |
S9S08SC4E0MTG574 Pin Configuration
| Pin 1 | Vdd — Power supply (4.5 V to 5.5 V) |
| Pin 2 | IRQ — External interrupt request pin |
| Pin 3 | BKGD/MS — Background debug / mode select |
| Pin 4 | RESET — External reset input, active low |
| Pin 5 | PTA0 — General purpose I/O / peripheral function |
| Pin 6 | PTA1 — General purpose I/O / peripheral function |
| Pin 7 | PTA2 — General purpose I/O / peripheral function |
| Pin 8 | PTA3 — General purpose I/O / peripheral function |
| Pin 9 | Vss — Ground reference |
| Pin 10 | PTB0 — General purpose I/O / peripheral function |
| Pin 11 | PTB1 — General purpose I/O / peripheral function |
| Pin 12 | PTB2 — General purpose I/O / peripheral function |
| Pin 13 | PTB3 — General purpose I/O / peripheral function |
| Pin 14 | PTC0 — General purpose I/O / peripheral function |
| Pin 15 | PTC1 — General purpose I/O / peripheral function |
| Pin 16 | OSC/CLK — Crystal oscillator or external clock input |
Typical Applications
S9S08SC4E0MTG574 is suitable for 6 applications: Automotive Body Lighting Controller, Remote Keyless Entry Receiver, White-Goods User Interface Controller, Industrial Sensor Interface Board, Battery Management Peripheral (5 V Rail), HVAC Flap and Blower Motor Controller.
Automotive Body Lighting Controller
The S9S08SC4E0MTG574 is well matched to low-cost body-lighting nodes - interior LED drivers, reading lamps, and puddle lamps - that must operate directly from the 5 V supply rail. Its 4.5 V-5.5 V input range, 40 MHz CPU throughput, and integrated timers (TPM, MTIM) provide enough performance for PWM-based LED dimming while keeping firmware size inside 4 KB Flash. The 16-pin TSSOP footprint limits PCB area, which is critical for lamp housings and door modules with constrained mechanical envelopes. Engineers typically pair the MCU with a discrete MOSFET driver stage and use the integrated SCI/SPI for diagnostic communication with the body controller.
Recommended
Remote Keyless Entry Receiver
For unidirectional RKE receivers, the S9S08SC4E0MTG574's HCS08 core is fast enough to demodulate ASK/FSK signals from 315 MHz or 433 MHz receivers, while the integrated SCI interfaces to the main body control unit. The 4 KB Flash holds the rolling-code firmware and the EEPROM emulation tables used to store paired transmitters. The wide -40 C to +125 C operating range covers the harsh under-dash thermal environment. Low-power Stop and Wait modes extend quiescent current on parked vehicles, and the COP watchdog protects against software lockups.
Recommended
White-Goods User Interface Controller
White-goods UI boards (washing machines, dishwashers, induction cooktops) benefit from the S9S08SC4E0MTG574's combination of small Flash, low-cost TSSOP-16 package, and robust -40 C to +125 C operating temperature. The HCS08 core drives small LED or LCD displays for knob encoder decoding and buzzer feedback. Hardware TPM generates PWM for tone generation and dimming without consuming CPU cycles. The integrated I2C controller communicates with sensor expansion boards, and the ACMP can detect water-level or line-voltage zero-cross for synchronous motor control.
Recommended
Industrial Sensor Interface Board
Industrial end-node boards - vibration sensors, photoelectric sensors, low-cost analog front-end boards - fit well within the S9S08SC4E0MTG574's 4 KB Flash and 128 B RAM envelope. Its S08 core executes lightweight filtering loops and Modbus-RTU framing over SCI, while hardware peripherals (SPI, I2C, ADC) read external sensor devices. Wide-temperature operation and on-chip voltage regulator with POR/Brown-out simplify field-installed designs running from a noisy 5 V industrial supply.
Recommended
Battery Management Peripheral (5 V Rail)
The S9S08SC4E0MTG574 operates as a low-cost monitor and balancer peripheral inside larger battery management systems where the main controller runs on a separate 5 V rail. Its integrated SCI speaks to the master BMS, the ACMP detects cell-voltage thresholds, and the COP watchdog guards against firmware lockup in high-vibration pack environments. The 16-pin TSSOP fits on small cell-balancing PCBs placed adjacent to each Li-ion cell group.
Recommended
HVAC Flap and Blower Motor Controller
In automotive HVAC modules, the S9S08SC4E0MTG574 drives stepper or DC-brushed motors for flap actuation and blower-speed regulation. The S08 core and TPM module deliver PWM up to 40 MHz system clock; ACMP can sense motor current for stall detection. The TSSOP-16 package enables placement directly inside compact HVAC modules, with the SCI bus reporting status to the climate-control head unit. Hardware Freescale BGND debug interface simplifies in-line firmware development during module integration.
Recommended
Recommended Products Summary
Engineering reference data for S9S08SC4E0MTG574 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | S9S08SH4MFK | MC9S08LL36CLK | MC9S08QD4CSC |
|---|---|---|---|---|
| Package | TSSOP-16 | TSSOP-16 - same footprint | TSSOP - same family footprint | TSSOP - same family footprint |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | HCS08 (S08) 8-bit | HCS08 (S08) 8-bit | HCS08 (S08) 8-bit | HCS08 (S08) 8-bit |
| CPU Frequency | 40 MHz | 40 MHz | 40 MHz | 20 MHz |
| Program Memory (Flash) | 4 KB | 4 KB | up to 36 KB family option | 4 KB family option |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Operating Temperature | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +85 C (consumer) |
| RoHS Status | Compliant | Compliant | Compliant | Compliant |
Key Differentiators
- Lowest-cost 5 V S08 with automotive temperature grade (vs MC9S08QD4CSC)
- Pin-compatible within the S08 family (vs MC9S08LL36CLK)
- Optimized for cost- and space-constrained body electronics (vs S9S08SG4 family)
Design Notes
Place the MCU's decoupling capacitors (100 nF plus a bulk 1-10 uF) as close as possible to the Vdd pin and the Vss pin. The TSSOP-16 land pattern allows short copper pours on both layers. Keep the BKGD/MS line away from switching traces and add a series resistor of 4.7 kohm to protect against programming-tool misconnection.
The S08's internal voltage regulator powers the core, but the analog supply must be tied to the same Vdd and bypassed separately. Failure to do so can cause ADC inaccuracy or POR misfires in noisy 5 V environments. Always enable the internal POR in the SOPT register before locking the configuration.
In Stop or Wait mode, the S9S08SC4E0MTG574 draws only a few microamps, but residual current can still flow through floating input pins. Add weak pull-downs to spare I/O lines and place unused analog inputs in their lowest-power register states to avoid false IRQs waking the CPU.
Compliance Information
RoHS compliant per NXP MC9S08SC4 datasheet. Industrial/consumer S08 family - AEC-Q100 only available on PC9S08SC4E0MTG variant, not the standard S9S08SC4E0MTG574.
