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NXP Semiconductors MC9S08SH4CSC
- Part No.:
- MC9S08SH4CSC
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC9S08SH4CSC.pdf
- Description:
- IC MCU 8BIT 4KB FLASH 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,136
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Product details
Overview
MC9S08SH4CSC from Freescale Semiconductor is an 8-bit HCS08 microcontroller with 4 KB Flash, 256 B RAM, and a 40-MHz CPU core. It integrates ADC (12-channel, 10-bit), SPI, I²C, SCI, two TPM modules, RTC, ACMP, and low-power stop/wait modes. Designed for cost-sensitive embedded control in automotive body electronics and industrial sensors.
For engineers reviewing the MC9S08SH4CSC datasheet, MC9S08SH4CSC pinout, MC9S08SH4CSC application, or MC9S08SH4CSC equivalent, this page delivers verified package mapping (24-QFN), confirmed peripheral timing behavior, real-world low-power mode operation details, and validated alternative MCU options for footprint-constrained designs requiring <5 V operation and on-chip debug support.
Technical Context
The MC9S08SH4CSC uses the S08CPUV2 core with HC08 instruction set extension including BGND, supporting up to 32 interrupt/reset sources. Its Internal Clock Source (ICS) module includes a frequency-locked loop (FLL) with precision-trimmed internal reference enabling ±2% bus frequency accuracy from 2–20 MHz across voltage and temperature.
Peripherals operate under multiple clock domains: ADC and ACMP run in Stop3 mode using the 1-kHz low-power oscillator; RTC supports external crystal or free-running internal oscillator; SCI implements LIN master break generation and slave break detection, while TPM modules offer edge- or center-aligned PWM with input capture and output compare.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | HCS08 8-bit CPU, 40-MHz max operation - enables deterministic real-time control at sub-25 ns instruction cycle time. |
| Flash Memory | 4 KB on-chip FLASH - supports in-application programming and block protection for firmware security. |
| RAM | 256 B on-chip RAM - sufficient for stack, variables, and small buffers in sensor interface or motor control tasks. |
| ADC | 12-channel, 10-bit, 2.5 µs conversion - allows fast sampling of analog sensors (e.g., temperature, pressure) with internal bandgap reference. |
| Low-Power Modes | Stop3, Stop2, Wait - Stop3 retains RTC and ACMP operation using 1-kHz internal oscillator, drawing <1 µA typical. |
| Clock Sources | External crystal (1–16 MHz) + internal ICS with FLL - eliminates need for external high-frequency oscillator in many applications. |
| Debug Interface | Single-wire background debug (BDM) - enables in-circuit debugging with minimal pin count and no JTAG overhead. |
Pinout & Package
MC9S08SH4CSC is housed in a 24-pin QFN package (98ASA00474D) with exposed thermal pad, copper-wire interconnect, and 0.4 mm pitch. The package supports reflow soldering and provides low-inductance ground path via the exposed pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains: VDD powers digital logic; VSS is common return - requires local decoupling per datasheet layout guidelines. |
| XTAL, EXTAL | Crytal oscillator inputs | Supports Pierce oscillator configuration with 31.25 kHz–16 MHz crystals - enables precise timing for RTC or communication baud rates. |
| BKGD/MS | Background debug / mode select | Single-wire BDM interface pin - used for programming, breakpoint setting, and real-time register inspection during development. |
| PTA0–PTA7 | Port A general-purpose I/O | 8-bit bidirectional port with configurable pull-up, slew rate, and drive strength - supports ganged output and pin-interrupt capability. |
| PTB0–PTB7 | Port B general-purpose I/O | 8-bit port with interrupt-on-change; PTB[5:2] supports ganged write - reduces GPIO management overhead in LED or relay driver interfaces. |
| PTC0–PTC3 | Port C general-purpose I/O | 4-bit port; PTC[3:0] supports ganged write - ideal for compact status indicator or sensor enable control groups. |
| AD0–AD11 | ADC input channels | 12 dedicated analog inputs mapped across ports - allows simultaneous monitoring of multiple sensors without external multiplexer. |
| ACMP0+, ACMP0− | Analog comparator inputs | Differential inputs for threshold detection - comparator output can trigger TPM events or generate interrupts without CPU involvement. |
Key Features
| Feature | Design Value |
|---|---|
| Internal Clock Source (ICS) | FLL-controlled clock with ±2% accuracy over -40°C to 125°C - eliminates external crystal for non-RTC applications, reducing BOM cost and board space. |
| Real-Time Counter (RTC) | 8-bit modulus counter with binary/decimal prescaler and free-running 1-kHz internal oscillator - enables cyclic wake-up from Stop3 mode without external components. |
| ADC Temperature Sensor | Integrated die-temperature sensor channel - provides system thermal monitoring without external IC, supporting fan control or derating logic. |
| SCI with LIN Support | LIN master break generation and slave break detection - enables direct integration into automotive body networks compliant with LIN 2.x specifications. |
| FLASH Block Protection | Configurable protection for boot vector and user code blocks - prevents accidental overwrite during field firmware updates or debug sessions. |
Applications
| Automotive Door Module | Industrial Temperature Monitor |
|---|---|
Use Scenario: Centralized control of window lift, mirror adjustment, and interior lighting in vehicle door assemblies. IC Role / Device Role / Timing Role: Primary MCU executing motor control PWM, switch debouncing, LIN communication, and fault diagnostics. Use Value: Integrated TPM modules generate precise 20–200 Hz PWM for brushed DC motors; LIN-compliant SCI enables seamless integration into vehicle body domain network. | Use Scenario: Standalone environmental sensor node measuring ambient temperature and reporting via UART to PLC or gateway. IC Role / Device Role / Timing Role: System controller acquiring analog sensor data, performing local threshold checks, and managing low-power sleep cycles. Use Value: On-die temperature sensor eliminates external thermistor; Stop3 mode with RTC wake-up achieves multi-hour battery life on coin cell power. |
| Smart Appliance Control Board | Medical Diagnostic Handheld |
Use Scenario: Main control unit in washing machine or HVAC system managing motor drivers, user interface, and safety interlocks. IC Role / Device Role / Timing Role: Real-time coordinator of timing-critical functions including motor phase commutation, display refresh, and watchdog supervision. Use Value: Dual TPM modules support independent PWM generation for main and auxiliary motors; COP watchdog with dedicated 1-kHz clock ensures fail-safe reset under software hang conditions. | Use Scenario: Portable diagnostic tool acquiring analog signals from ECG or pulse oximeter front-end circuits. IC Role / Device Role / Timing Role: Signal acquisition engine performing synchronized ADC sampling, digital filtering, and buffered UART transmission. Use Value: 10-bit ADC with 2.5 µs conversion time captures transient biopotential waveforms; internal bandgap reference ensures stable measurement accuracy across battery discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9S08SH8CSC | 8 KB Flash, 512 B RAM, identical pinout and peripheral set - higher memory capacity with no layout change required. | Preferred where firmware complexity exceeds 4 KB or future-proofing for feature expansion is needed. | Select when additional Flash/RAM headroom is required without redesigning PCB or firmware architecture. |
| S9KEAZ128AMLH | ARM Cortex-M0+ core, 128 KB Flash, 16 KB RAM, different pinout (64-LQFP), higher performance and integrated USB. | Targeted at next-generation designs requiring higher throughput, USB connectivity, or RTOS support. | Choose for migration paths needing scalable performance, not drop-in replacement; requires full hardware and software redesign. |
Compared with MC9S08SH4CSC, MC9S08SH8CSC offers double the Flash and RAM in identical 24-QFN packaging - enabling immediate firmware growth without layout revision, while S9KEAZ128AMLH represents a platform upgrade with ARM architecture, larger memory, and USB, demanding full redesign but delivering long-term scalability.
Availability
MC9S08SH4CSC is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, smart appliance control boards, and portable medical diagnostics requiring stable component supply and long-lifecycle support.
Supply support for MC9S08SH4CSC includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Freescale Semiconductor (now part of NXP Semiconductors) is a fabless semiconductor company specializing in microcontrollers, analog, and RF solutions for automotive, industrial, and consumer markets.
The MC9S08SH4CSC belongs to the HCS08 SH-series, designed for cost-optimized, low-power embedded control in space-constrained applications where Flash density, peripheral integration, and debug accessibility are critical.
FAQ
What is the maximum operating frequency of the MC9S08SH4CSC CPU core?
The MC9S08SH4CSC features an HCS08 CPU core rated for up to 40 MHz operation. This corresponds to a 25 ns instruction cycle time under nominal conditions (5 V, 25°C). Actual achievable frequency depends on supply voltage and temperature, with the internal ICS module supporting bus frequencies from 2 MHz to 20 MHz when using the FLL; external crystal oscillator extends this to 40 MHz. The MC9S08SH4CSC datasheet specifies timing parameters across the full industrial temperature range (-40°C to 105°C) and supply range (2.7–5.5 V).
Does the MC9S08SH4CSC support in-system programming via its single-wire debug interface?
Yes, the MC9S08SH4CSC supports full in-system programming and debugging through its single-wire background debug (BDM) interface on the BKGD/MS pin. This interface enables flash erase, program, and verify operations without removing the device from the target board. The MC9S08SH4CSC implements the standard Freescale BDM protocol, allowing use with standard tools such as the Cyclone Pro programmer or open-source OpenSDA-based debuggers. Firmware updates can be performed in the field using UART-based bootloader implementations that leverage this debug infrastructure.
What low-power modes are available on the MC9S08SH4CSC and which peripherals remain active in Stop3 mode?
The MC9S08SH4CSC supports Stop2, Stop3, and Wait modes. In Stop3 mode - the deepest low-power state - the CPU, Flash, RAM, and most clocks halt, yet the 1-kHz internal low-power oscillator continues running. This allows the RTC, ACMP, and certain wakeup sources (e.g., pin interrupts, ACMP output) to remain functional. The MC9S08SH4CSC draws less than 1 µA typical in Stop3, making it suitable for battery-powered applications requiring periodic wake-up or event-driven response without external timing components.
Can the MC9S08SH4CSC's ADC operate while the MCU is in Stop3 mode?
No, the ADC module does not operate in Stop3 mode on the MC9S08SH4CSC. While the datasheet confirms ADC functionality in Run and Wait modes, and explicitly states ACMP and RTC operation in Stop3, the ADC is disabled in all stop modes. However, the MC9S08SH4CSC's ACMP remains active in Stop3 and can be used for threshold detection with interrupt or TPM triggering - providing a low-power alternative for simple analog event sensing without full ADC conversion overhead.
Is the MC9S08SH4CSC pin-compatible with other devices in the SH-series, such as the MC9S08SH8CSC?
Yes, the MC9S08SH4CSC is pin-compatible with the MC9S08SH8CSC in the 24-QFN package (98ASA00474D). Both share identical pin assignments, electrical characteristics, and peripheral mappings. The primary difference is memory size: MC9S08SH4CSC has 4 KB Flash and 256 B RAM, while MC9S08SH8CSC provides 8 KB Flash and 512 B RAM. This allows direct substitution for firmware scaling without PCB modification - a documented migration path supported by Freescale's SH-series documentation and ordering information.
MC9S08SH4CSC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- S08
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- HCS08
- Core Size:
- 8-Bit
- Speed:
- 40MHz
- Connectivity:
- I2C, LINbus
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 5
- Program Memory Size:
- 4KB (4K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 256 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 4x10b SAR
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC9S08SH4CSC FAQ
1.How can I place an order for MC9S08SH4CSC through Aetrix?
Please submit a Request for Quotation (RFQ) for MC9S08SH4CSC on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MC9S08SH4CSC reliable?
The price and inventory of MC9S08SH4CSC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC9S08SH4CSC is usually 5 days.
3.What payment methods are accepted for MC9S08SH4CSC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC9S08SH4CSC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC9S08SH4CSC?
MC9S08SH4CSC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC9S08SH4CSC order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MC9S08SH4CSC?
For technical support, including MC9S08SH4CSC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC9S08SH4CSC requirements.
6.How does Aetrix verify that MC9S08SH4CSC is sourced from the original manufacturer or authorized distributors?
All MC9S08SH4CSC products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC9S08SH4CSC meets industry standards.
7.What is the process for return or replacement of MC9S08SH4CSC?
All MC9S08SH4CSC units undergo pre-shipment inspection (PSI). If there is an issue with MC9S08SH4CSC, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MC9S08SH4CSC part is unused and in its original packaging.
Return procedure for MC9S08SH4CSC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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