MC9S08SH4CTG - 8-bit S08 MCU 4KB Flash 40MHz 16-TSSOP | NXP
MPN: MC9S08SH4CTG ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.45 | $3.45 |
| 10 | $3.12 | $31.20 |
| 100 | $2.78 | $278.00 |
| 500 | $2.41 | $1,205.00 |
| 1,000 | $2.05 | $2,050.00 |
MC9S08SH4CTG Overview
An 8-bit microcontroller (MCU) is a small computer-on-a-chip that integrates an 8-bit CPU core, non-volatile program memory, working RAM, and peripherals such as timers, communication interfaces, and analog converters. Within the semiconductor hierarchy, MCUs sit under microcontrollers, then embedded processors, then logic/semiconductor ICs. The S08 family specifically uses an enhanced HCS08 instruction set with the BGND (background debug) instruction added for in-circuit debug.
Key features include 4 KB flash, 256 B RAM, a 12-channel 10-bit ADC with 2.5 µs conversion time, an analog comparator, an internal temperature sensor, plus SCI, SPI, and I²C communication interfaces. The device supports up to 32 interrupt/reset sources and offers 13 GPIO pins. Operating voltage spans 2.7 V to 5.5 V, suiting 3.3 V and 5 V designs.
Architecturally, the MC9S08SH4CTG uses a CISC HCS08 core with a 20 MHz internal bus, achieving 40 MHz CPU throughput, plus on-chip debug and a single-wire background debug mode. It is pin, tool, and software compatible with the S08SG family, easing code migration.
Typical applications include low-end consumer appliances, white goods control boards, simple sensor nodes, industrial 5 V control logic, automotive body controllers (where an AEC-Q100 equivalent such as MC9S08SH4CFK is preferred), and battery-powered handheld devices.
When designing with this MCU, budget for the internal bus at 20 MHz and verify the 16-pin TSSOP thermal envelope at sustained 40 MHz operation. For new designs consider migrating to the active S08SH4/8 variants in 20-pin TSSOP for additional GPIO.
This page synthesizes distributor pricing, drop-in alternatives from the S08SH family, and practical design notes that complement the manufacturer datasheet for engineers evaluating the MC9S08SH4CTG.
Drop-in alternatives for MC9S08SH4CTG — 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 MC9S08SH4CTG (same form factor and footprint) — differing in Package, ADC, Instruction Set, Operating Temperature, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08SH8CTG
✅ Drop-In✓ In Stock
$1.62 / Unit
View Datasheet →MC9S08SH8CTG
✅ Drop-In✓ In Stock
$1.62 / Unit
View Datasheet →MC9S08SH4CTJ
✅ Drop-In✓ In Stock
$1.85 / Unit
View Datasheet →MC9S08SH4MTG
✅ Drop-In✓ In Stock
$4 / Unit
View Datasheet →MC9S08SG4CTG
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08SH4CTG Maximum Ratings & Electrical Characteristics
| Core | S08 (HCS08) 8-bit CISC |
| CPU Speed | 40 MHz (20 MHz bus) |
| Program Memory | 4 KB flash |
| RAM | 256 B |
| Package | 16-pin TSSOP |
| Operating Voltage | 2.7 V to 5.5 V |
| ADC | 12-channel, 10-bit, 2.5 µs conversion |
| Analog Comparator | Yes |
| Temperature Sensor | Internal |
| Communication Interfaces | SCI, SPI, I²C |
| GPIO | 13 |
| Interrupt Sources | Up to 32 |
| Operating Temperature | -40 °C to +85 °C |
| Mounting Type | Surface Mount |
| MSL Level | 1 |
| Background Debug | Yes (single-wire BGND) |
MC9S08SH4CTG Pin Configuration
| Pin 1 | PTA0/TCLK/ADP0 — Port A bit 0 / TCLK / ADC channel 0 |
| Pin 2 | PTA1/ADP1 — Port A bit 1 / ADC channel 1 |
| Pin 3 | PTA2/ADP2 — Port A bit 2 / ADC channel 2 |
| Pin 4 | PTA3/ADP3 — Port A bit 3 / ADC channel 3 |
| Pin 5 | VSS — Ground |
| Pin 6 | VDD — Supply voltage (2.7 V to 5.5 V) |
| Pin 7 | PTB0/SPSCR/ADPx — Port B bit 0 / SPI clock / ADC channel |
| Pin 8 | PTB1/MOSI/ADPx — Port B bit 1 / SPI MOSI / ADC channel |
| Pin 9 | PTB2/MISO/ADPx — Port B bit 2 / SPI MISO / ADC channel |
| Pin 10 | PTB3/SS/ADPx — Port B bit 3 / SPI SS / ADC channel |
| Pin 11 | PTC0/RxD/ADP — Port C bit 0 / SCI RxD / ADC channel |
| Pin 12 | PTC1/TxD/ADP — Port C bit 1 / SCI TxD / ADC channel |
| Pin 13 | PTC2/SDA/ADP — Port C bit 2 / I²C SDA / ADC channel |
| Pin 14 | PTC3/SCL/ADP — Port C bit 3 / I²C SCL / ADC channel |
| Pin 15 | BKGD/MS — Background Debug / Mode Select |
| Pin 16 | RESET — Reset input (active low) |
Typical Applications
MC9S08SH4CTG is suitable for 6 applications: Low-End Consumer Appliance Control, White Goods Control Boards, Industrial 5 V Sensor Node, Simple Battery-Powered Handheld, Automotive Body Controller Auxiliary, Remote Control and IR Transmitter.
Low-End Consumer Appliance Control
The MC9S08SH4CTG's 4 KB flash, 12-channel 10-bit ADC, and 5 V operation make it a cost-effective controller for consumer appliances. With its 256 B RAM supporting state-machine logic for simple control loops, the MCU handles relay drivers, user I/O, and basic sensor reads. Operating at 40 MHz CPU speed, it can service keypad scanning and LED multiplexing without an RTOS, while the on-chip SCI enables status reporting to a master display board.
Recommended
White Goods Control Boards
Washing machines, dryers, and dishwashers benefit from the MC9S08SH4CTG's 2.7 V to 5.5 V supply tolerance, internal temperature sensor, and analog comparator. The 12-bit ADC accuracy is sufficient for thermistor-based water-temperature sensing, while the SCI enables communication with an inverter or display module. Drop-in compatibility with the S08SG family lets manufacturers reuse firmware across product tiers.
Recommended
Industrial 5 V Sensor Node
The MC9S08SH4CTG's 5 V I/O tolerance removes the need for external level shifters when interfacing legacy industrial sensors. The 12-channel ADC supports multi-sensor acquisition (pressure, flow, temperature), while the I²C and SPI peripherals connect to digital sensors and EEPROMs. With 40 MHz CPU throughput, the MCU can run a Modbus slave over SCI for SCADA integration in factory automation.
Recommended
Simple Battery-Powered Handheld
The MC9S08SH4CTG's low-power HCS08 core, internal temperature sensor, and 2.7 V minimum supply let it run from two AA cells. The integrated ADC supports battery voltage monitoring, while stop-mode current and the internal 1 kHz low-power oscillator minimize quiescent drain. Its 16-pin TSSOP footprint keeps the BOM compact for handheld thermometers, IR remotes, and simple measurement tools.
Recommended
Automotive Body Controller Auxiliary
For non-safety automotive body functions such as interior lighting or seat-position memories, the MC9S08SH4CTG provides sufficient GPIO and SCI/SPI connectivity. While the standard CTG part is NRND rather than AEC-Q100 qualified, designers may evaluate the S08SH automotive variants for non-safety body modules. The 12-channel ADC reads multiple switch inputs, and the analog comparator detects voltage thresholds.
Recommended
Remote Control and IR Transmitter
The MC9S08SH4CTG's SCI module supports infrared modulation directly, enabling IR remote-control applications. Its low pin count (13 GPIO) suits minimalist transmitters, while the 4 KB flash holds extensive key-code tables. The integrated temperature sensor can compensate IR LED characteristics over temperature, and the HCS08 BGND instruction simplifies in-circuit firmware development for consumer remote designs.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08SH4CTG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08SH8CTG | MC9S08SH4CTJ | MC9S08SH4MTG | MC9S08SG4CTG |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 16-TSSOP | 16-TSSOP - same | 20-TSSOP - same family | 16-QFN - same family | 16-TSSOP - same |
| Flash | 4 KB | 8 KB (+100%) | 4 KB (same) | 4 KB (same) | 4 KB (same) |
| RAM | 256 B | 512 B (+100%) | 256 B (same) | 256 B (same) | 256 B (same) |
| CPU Speed | 40 MHz | 40 MHz (same) | 40 MHz (same) | 40 MHz (same) | 40 MHz (same) |
| GPIO | 13 | 13 (same) | 17 (+4) | 13 (same) | 13 (same) |
| Operating Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V (same) | 2.7 V to 5.5 V (same) | 2.7 V to 5.5 V (same) | 2.7 V to 5.5 V (same) |
| Lifecycle | NRND | Active | NRND | NRND | NRND |
Key Differentiators
- Highest flash density in 16-pin footprint of same family (vs MC9S08SH4CTG vs MC9S08SH4MTG (same 16-pin outline, MTG is 16-QFN))
- Direct upgrade path to 8 KB flash in same package (vs MC9S08SH8CTG)
- Pin-compatible with 20-TSSOP variant for GPIO expansion (vs MC9S08SH4CTJ)
Design Notes
The MC9S08SH4CTG accepts 2.7 V to 5.5 V on VDD (pin 6). Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of the pin, plus a 10 µF bulk capacitor on the supply rail. For battery-powered applications, route the internal 1 kHz low-power oscillator to the system clock in stop mode to minimize quiescent current.
Place the BKGD/MS pin (pin 15) trace away from high-frequency switching nodes. The single-wire background debug interface is sensitive to capacitive loading above 50 pF; keep the trace under 50 mm and avoid passing it under signal traces. For production boards, add a 4.7 kΩ pull-up on RESET (pin 16).
Do not assume the SCI pins (PTC0/PTC1) are 5 V tolerant when the MCU is powered at 3.3 V - they are limited by VDD. Also note that the 12-channel ADC has a 2.5 µs conversion time, which limits sampled bandwidth to ~400 kS/s; do not exceed this for accurate conversions. The internal temperature sensor requires calibration constants stored in flash for accurate readings.
Compliance Information
Pb-free assembly indicated by 'G' suffix in MPN. RoHS/REACH formal certificates not in verified data - request from NXP. Part is NRND per NXP product page; not AEC-Q100 qualified (consider S08SH automotive variants for body controllers).