MC9S08SH16CTJ - 8-bit MCU, 16KB Flash, 40MHz | NXP
MPN: MC9S08SH16CTJ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.91 | $5.91 |
| 10 | $5.62 | $56.20 |
| 100 | $5.32 | $532.00 |
| 500 | $5.02 | $2,510.00 |
| 1,000 | $4.73 | $4,730.00 |
MC9S08SH16CTJ Overview
An 8-bit MCU is a single-chip computer whose CPU processes data 8 bits at a time. Within the embedded systems hierarchy, the S08 family sits under NXP's (formerly Freescale Semiconductor's) HC08/HCS08 lineage of CISC microcontrollers, which in turn belong to the broader class of microcontroller units - devices integrating a processor core, memory, and peripherals on one die. The S08SH series is positioned as a low-cost, low-pin-count option for classic 5V applications.
Key features include the HCS08 core executing the HC08 instruction set plus the added BGND instruction, a 12-channel 10-bit ADC, and connectivity peripherals comprising I2C, LIN, SCI, and SPI. On-chip system protections include a low-voltage detector (LVD), power-on reset (POR), pulse-width modulation (PWM) capability, and a watchdog timer (WDT), with support for up to 32 interrupt/reset sources. The device provides 17 general-purpose I/O lines.
Architecturally, the S08 core is an enhanced HC08 CPU with improved interrupt handling and background debug mode (BGND) support, allowing non-intrusive flash programming and debugging through NXP's background debug controller. Flash memory is in-circuit erasable and programmable, simplifying field updates. The 5V-tolerant operating range differentiates the SH family from many modern 3.3V-only MCUs, allowing direct interface with legacy 5V sensors and industrial signaling.
Typical applications include small appliance control, automotive body accessories, motor and LED control nodes, LIN-bus slave modules, and 5V industrial sensor transmitters - anywhere a compact, low-pin-count, flash-based 8-bit controller with an integrated 10-bit ADC is required.
For design, take advantage of the wide 2.7V to 5.5V supply range but verify ADC reference stability across supply variation; use the internal LVD and watchdog for unattended reliability, and observe proper decoupling on the 20-TSSOP supply pins.
This page synthesizes distributor pricing, verified drop-in alternatives, and practical design guidance not found in the manufacturer datasheet alone.
Drop-in alternatives for MC9S08SH16CTJ — 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 MC9S08SH16CTJ (same form factor and footprint) — differing in Package, Core Processor, Instruction Set, Debug Interface, Flash Memory.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08SH32CTJ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.52 / Unit
View Datasheet →MC9S08SH8CTJ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.2 / Unit
View Datasheet →MC9S08SH4CTJ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.85 / Unit
View Datasheet →MC9S08SH16MTJ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.95 / Unit
View Datasheet →MC9S08SH16CTJR
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08SH16CTJ Maximum Ratings & Electrical Characteristics
| Core Processor | S08 (HCS08) 8-bit CISC |
| Core Size | 8-bit |
| Maximum Clock Frequency | 40 MHz |
| Program Memory Size | 16KB (16K x 8) Flash |
| RAM Size | 512B |
| Data Bus Width | 8 bit |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Operating Temperature Range | -40C to +85C |
| Number of I/O | 17 |
| ADC Resolution | 10-bit |
| ADC Channels | 12-channel |
| Connectivity | I2C, LIN, SCI, SPI |
| Peripherals | LVD, POR, PWM, WDT |
| Interrupt/Reset Sources | Up to 32 |
| Instruction Set | HC08 with added BGND instruction |
| Package | 20-TSSOP (0.173 inch, 4.40 mm width) |
| Mounting Type | Surface Mount |
| Packaging | Tube |
| Product Series | S08SH (MC9S08) |
MC9S08SH16CTJ 20-tssop (0.173 inch, 4.40 mm width) Pin Configuration Guide
Pin configuration for MC9S08SH16CTJ (20-tssop (0.173 inch, 4.40 mm width) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for MC9S08SH16CTJ.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S08SH16CTJ is suitable for 6 applications: Automotive Body Electronics and LIN Slave Nodes, 5V Industrial Sensor Transmitters, Small Appliance and Home Device Control, Brushed/Stepper Motor Control Modules, LED Lighting and Dimming Controllers, Battery-Powered Portable Instruments.
Automotive Body Electronics and LIN Slave Nodes
The MC9S08SH16CTJ fits automotive body accessory nodes because it integrates a LIN interface with SCI, a 12-channel 10-bit ADC for switch and sensor reading, and a 5V-range 2.7V-5.5V supply that matches in-vehicle battery-derived rails after regulation. NXP explicitly markets the S08SH series for automotive applications. In a typical window-lift or seat-control module, the MCU runs the LIN slave stack in the 16KB flash, samples limit-switch and current-sense inputs via the ADC at up to 40MHz bus speed, and drives loads through the 17 GPIO with PWM. The on-chip watchdog (WDT) and low-voltage detector (LVD) provide the fault monitoring expected in vehicle environments. Its compact 20-TSSOP package suits dense body-control PCBs.
Recommended
5V Industrial Sensor Transmitters
Legacy 4-20mA and 0-10V industrial transmitters run on 5V rails where the MC9S08SH16CTJ's wide 2.7V-5.5V supply allows direct connection without level shifting. The 12-channel 10-bit ADC digitizes bridge or potentiometer sensor inputs, while the SCI/SPI peripherals stream readings to an HART or RS-485 front end. The HCS08 core at 40MHz has ample throughput for linearization tables and filtering within 16KB flash and 512B RAM for small calibration datasets. The low-voltage detector flags brownout before computation errors occur, and the watchdog guarantees recovery in unattended installations. Industrial cabinets commonly hold -40C to +85C ambient extremes, which matches this part's C-grade rating exactly.
Recommended
Small Appliance and Home Device Control
Rice cookers, fans, coffee makers, and thermostats are classic 8-bit MCU designs, and the MC9S08SH16CTJ covers them with PWM outputs for heater or motor control, a 10-bit ADC for NTC temperature sensing, and 17 GPIO for keys and LEDs. The 5V-tolerant S08SH platform lets designers power the MCU from simple transformer or capacitive-drop supplies. Its 16KB flash holds control state machines, touch/button debouncing, and display multiplexing with headroom; 40MHz bus speed keeps PID loops responsive. The package's 20-pin TSSOP keeps the control PCB to a minimal two-layer layout. POR and LVD ensure the appliance always starts in a safe state after mains interruptions.
Recommended
Brushed/Stepper Motor Control Modules
The MC9S08SH16CTJ suits small motor control modules where PWM generation, current sensing, and a serial link are needed. Its hardware PWM capability plus the 12-channel 10-bit ADC enables closed-loop speed or current control: the ADC samples a shunt-resistor current signal while the HCS08 core at up to 40MHz updates the PWM duty cycle. SPI connects to gate drivers or stepper translators, and the LIN/SCI ports accept host commands in industrial or automotive sub-networks. The 5.5V maximum supply aligns with 5V gate-driver logic, and the LVD prevents half-driven output states during power-up or brownout. The 20-TSSOP footprint fits compact driver boards mounted on or near the actuator.
Recommended
LED Lighting and Dimming Controllers
Dimmable LED drivers benefit from the MC9S08SH16CTJ's PWM outputs and 10-bit ADC: the MCU reads a dimmer potentiometer or 0-10V control input through the ADC and converts it to a precise PWM duty cycle for a switching LED driver stage. Operating at 2.7V-5.5V, the controller interfaces directly with common 5V gate-driver or constant-current regulator circuits. LIN and SCI ports enable lighting-network connectivity in commercial installations, while 17 GPIO handles presence sensors and indicator LEDs. Flash-based firmware permits field updates of dimming curves and color-temperature profiles via the background debug interface. The wide -40C to +85C range suits outdoor luminaire enclosures that heat up under full load.
Recommended
Battery-Powered Portable Instruments
Handheld meters and portable gauges exploit the MC9S08SH16CTJ's flexible 2.7V supply floor, allowing operation directly from three alkaline cells (4.5V nominal) or a single lithium cell through an LDO. The 10-bit ADC reads sensor front ends while the SCI/SPI ports drive LCD modules or log data to external EEPROM. The S08 core offers low-power wait and stop modes for battery budget management, and the integrated POR/LVD protect calibration data in flash during battery swap. At 40MHz maximum bus speed, burst computations complete quickly so the MCU can return to sleep between measurements. The small 20-TSSOP body (4.40mm width) supports slim handheld enclosures.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08SH16CTJ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08SH32CTJ | MC9S08SH8CTJ | MC9S08SH4CTJ | MC9S08SH16MTJ | MC9S08SH16CTJR |
|---|---|---|---|---|---|---|
| Package | 20-TSSOP | 20-TSSOP - same | 20-TSSOP - same | 20-TSSOP - same | 20-TSSOP - same | 20-TSSOP - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Flash Memory | 16KB | 32KB | 8KB | 4KB | 16KB | 16KB |
| Core / Bus Speed | S08, 40 MHz | S08, 40 MHz | S08, 40 MHz | S08, 40 MHz | S08, 40 MHz | S08, 40 MHz |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| ADC | 12-channel, 10-bit | 12-channel, 10-bit | 12-channel, 10-bit | 12-channel, 10-bit | 12-channel, 10-bit | 12-channel, 10-bit |
| Connectivity | I2C, LIN, SCI, SPI | I2C, LIN, SCI, SPI | I2C, LIN, SCI, SPI | I2C, LIN, SCI, SPI | I2C, LIN, SCI, SPI | I2C, LIN, SCI, SPI |
| Packaging / Shipping | Tube (CTJ) | Tube (CTJ suffix) | Tube (CTJ suffix) | Tube (CTJ suffix) | Tube (MTJ suffix) | Tape & Reel (CTJR, per Xecor pack_type REEL) |
Key Differentiators
- Double the program memory of the value variant (vs MC9S08SH8CTJ)
- Extended-temperature option on identical die (vs MC9S08SH16MTJ)
- True 5V-range operation (vs Modern 3.3V ARM MCUs in similar packages)
Design Notes
Design the supply for the full 2.7V-5.5V range with a 100nF ceramic decoupling capacitor placed within 5mm of each VDD/VSS pin pair on the 20-TSSOP, plus one bulk 4.7uF-10uF capacitor per board. The on-chip low-voltage detector (LVD) will hold the MCU in reset during brownouts, but ensure your regulator's ramp is monotonic so the POR releases into a valid state. Avoid powering the part from long inductive harnesses without local bulk capacitance in automotive LIN nodes, since load-dump transients on the module input can couple into the ADC reference and distort 10-bit conversions.
On a two-layer board, dedicate the bottom layer as a ground pour under the MCU and keep the ADC input traces (up to 12 channels) short and away from PWM and LIN/SPI signal lines to prevent digital coupling into analog readings. If unused ADC channels are configured as GPIO, tie or define them to a fixed state in firmware to prevent floating inputs. The TSSOP-20 lead pitch (0.65mm) is hand-solderable, but for reflow assembly use the standard TSSOP land pattern per IPC-7351 and avoid via-in-pad on the fine-pitch leads.
Three frequent mistakes with S08SH designs: (1) exceeding 16KB flash with larger-than-expected compiler libraries - verify the .map file early and budget headroom, or select the pin-compatible MC9S08SH32CTJ; (2) ignoring the 512B RAM limit when enabling stack-heavy communication stacks - the LIN driver plus ISR nesting can exhaust RAM; (3) selecting the CTJ (commercial) grade for enclosures that exceed +85C - use the MC9S08SH16MTJ extended-temperature variant instead. Also enable the watchdog (WDT) in all production builds; it is disabled by default after reset in debug configurations.
For the LIN interface, use a LIN transceiver (e.g., NXP LIN family) between the MCU SCI pin and the bus, with the transceiver's wake/flag lines routed to GPIO. Keep the 40MHz internal bus clock routing entirely on-chip - no external clock traces are required in oscillator-less configurations, which eliminates a whole class of EMI issues. When driving long PWM output harnesses, add series 100R resistors at the pin to slow edge rates and reduce radiated emissions in EMC-tested automotive modules.
Compliance Information
RoHS detail not explicitly stated in the retrieved distributor snippets for this exact ordering code; confirm on the official NXP product page compliance section. NXP describes the S08SH series for automotive applications; the specific AEC-Q100 qualification level of MC9S08SH16CTJ was not stated in the provided data.
