MC9S08SH8CTJ - 8-Bit 40MHz 8KB Flash MCU | NXP | S08
Référence : MC9S08SH8CTJ ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $6.63 | $6,63 |
| 10 | $6.3 | $63,00 |
| 100 | $5.9 | $590,00 |
| 500 | $5.55 | $2 775,00 |
| 1 000 | $5.2 | $5 200,00 |
MC9S08SH8CTJ Présentation
An 8-bit microcontroller (MCU) is a single integrated circuit that combines a processor core, memory, and peripherals such as ADCs, timers, and communication interfaces on one die. MCUs sit at the lowest level of the embedded computing hierarchy - from microcontroller to embedded processor to application processor - and are the workhorses of cost-sensitive control tasks in appliances, automotive body electronics, and industrial sensors. The S08 (HCS08) family from NXP (formerly Freescale) extends the HC08 instruction set with a BGND background-debug instruction and supports up to 32 interrupt/reset sources.
Key features of the MC9S08SH8CTJ include the enhanced HCS08 CPU core (20MHz internal bus frequency, 40MHz CPU operation), 8KB of in-circuit-programmable flash, 512 bytes of RAM, a 12-channel 10-bit ADC with 2.5us conversion time and automatic compare function, and an integrated analog comparator. The device operates from 3.3V or 5V supplies, making it a natural fit for 5-volt-range applications where many modern MCUs require level shifting.
Architecturally, the S08SH family is positioned as a low-end option within the HCS08 portfolio, retaining the low-cost, high-performance character of the original Freescale HC08/HCS08 line while adding flash-based reprogrammability and low-power wait/stop modes. Development uses the standard NXP CodeWarrior toolchain and the BDM (background debug mode) interface enabled by the BGND instruction.
Typical applications include small appliance control, automotive body and convenience modules, battery chargers, sensor interfaces, and motor control of small fans and pumps, where the 10-bit ADC and analog comparator reduce external component count.
Design consideration: the part is marked NRND (Not Recommended for New Designs) on the NXP product page, so new designs should evaluate the S08SG/S08P successors, while the 20-TSSOP footprint simplifies migration within the family.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Alternatives de remplacement direct pour MC9S08SH8CTJ — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec MC9S08SH8CTJ (même facteur de forme et même empreinte) — différant par Instruction Set, Package, Analog Comparator, Core Processor, ADC Resolution.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MC9S08SH8MTJ
✅ Remplacement direct✓ En stock
$4.79 / unité
Voir la fiche technique →MC9S08SH8CTJR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC9S08SH4CTJ
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$1.85 / unité
Voir la fiche technique →MC9S08SH16CTJ
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$4.73 / unité
Voir la fiche technique →MC9S08SH8CTJ Valeurs maximales et caractéristiques électriques
| Core Processor | S08 (HCS08) |
| Core Size | 8-Bit |
| Maximum CPU Frequency | 40 MHz |
| Internal Bus Frequency | 20 MHz |
| Flash Memory | 8 KB (8K x 8) |
| RAM Size | 0.512 KB |
| ADC Resolution | 10-bit |
| ADC Channels | 12-channel |
| ADC Conversion Time | 2.5 us |
| Analog Comparator | Yes, 1 |
| GPIO Count | 17 |
| Tension d'alimentation | 3.3 V / 5 V |
| Interrupt/Reset Sources | Up to 32 |
| Boîtier | 20-TSSOP (0.173", 4.40mm Width) |
| Nombre de broches | 20 |
| Type de montage | Surface Mount |
| Packaging | Tube |
| Instruction Set | HC08 CISC with added BGND instruction |
Guide de configuration des broches du MC9S08SH8CTJ 20-tssop (0.173", 4.40mm width)
Configuration des broches du MC9S08SH8CTJ (boîtier 20-tssop (0.173", 4.40mm width)). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour MC9S08SH8CTJ.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
MC9S08SH8CTJ convient pour 6 applications: Small Appliance Control, Automotive Body Electronics, Battery Chargers, Sensor Interfaces, Small Motor and Fan Control, Industrial Control and Legacy Board Maintenance.
Small Appliance Control
The MC9S08SH8CTJ fits small appliance control boards such as coffee makers, fans, and heaters because it integrates the three functions such boards need most: a 10-bit ADC with 12 channels for temperature sensing (NTC thermistors) and potentiometer position readout, an analog comparator for zero-cross or over-current detection, and 17 GPIO lines for relays, LEDs, and buttons. Its 5V operation matches legacy appliance power rails without level shifting, and the 40MHz HCS08 core handles control loops comfortably. Flash-based reprogramming lets one PCB serve multiple product variants. Using the internal oscillator and ADC's automatic compare function reduces external component count and BOM cost in cost-sensitive consumer designs.
Recommandé
Automotive Body Electronics
NXP describes the S08SH family as targeting embedded automotive applications, and the MC9S08SH8CTJ's peripheral set matches typical body-electronics nodes: mirror switches, seat position sensors, lighting modules, and wiper controls. The 12-channel 10-bit ADC reads resistive position sensors and analog fault lines with 2.5us conversion time, the analog comparator provides window or threshold supervision without an external IC, and 17 GPIO handle switch matrices and lamp drives. The 5V supply range aligns with clamped automotive loads, and the BGND instruction supports robust background debugging during EOL programming on the production line. Verify the correct automotive temperature-grade ordering code before release.
Recommandé
Battery Chargers
Battery charger controllers benefit directly from the MC9S08SH8CTJ's analog peripherals. The 10-bit ADC monitors battery voltage and pack temperature through NTC inputs across its 12 channels, while the analog comparator can terminate fast-charge on a current threshold independently of software, providing a fail-safe path. Timer modules generate PWM for buck-converter charge control, and the 40MHz core executes charging state machines (trickle, CC, CV, top-off) with margin. Operation from a 5V rail suits USB or wall-adapter front ends. Flash memory stores calibration data per unit, and in-circuit reprogramming allows firmware updates to support new battery chemistries without hardware changes.
Recommandé
Sensor Interfaces
The MC9S08SH8CTJ serves as a compact sensor interface node: the 12-channel, 10-bit ADC digitizes pressure, humidity, or position sensor outputs with a 2.5us conversion time and an automatic compare function that flags threshold crossings in hardware, reducing polling overhead. SPI and I2C modules let the MCU stream readings to a host or drive local displays, while the analog comparator adds an independent alarm path. With 512 bytes of RAM, the part can apply digital filtering and offset correction to raw readings. The 20-TSSOP package keeps the node footprint small for PCB-space-limited sensor pods in industrial monitoring equipment.
Recommandé
Small Motor and Fan Control
For driving small DC fans, pumps, and hobby-class motors, the MC9S08SH8CTJ combines PWM timers for speed control with the analog comparator for over-current or stall detection and the 10-bit ADC for back-EMF or current-loop feedback. The 17 GPIO lines manage Hall-sensor inputs, direction relays, and tachometer outputs. The 40MHz HCS08 core runs closed-loop speed control at kilohertz update rates with ample margin, and the 5V operation directly drives low-side MOSFET gate drivers on 5V logic. Flash storage retains speed profiles and fault logs across power cycles, enabling one firmware image to serve multiple product SKUs via calibration flags.
Recommandé
Industrial Control and Legacy Board Maintenance
Many industrial sub-boards - relay controllers, indicator panels, and 5V PLC I/O cards - were designed around the HCS08 family, and the MC9S08SH8CTJ remains a mainstay for maintaining and extending those products. Its HC08-compatible CISC instruction set means firmware written for HC08 predecessors ports with minimal changes, and the 40MHz clock doubles performance over 20MHz HC08 parts. The BDM interface with the BGND instruction supports in-circuit reflash on installed equipment, minimizing field-service downtime. Because the part is NRND, use pin-compatible SH4/SH8/SH16 family members for future builds to spread supply risk across the S08SH portfolio.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC9S08SH8CTJ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MC9S08SH8MTJ | MC9S08SH8CTJR | MC9S08SH4CTJ | MC9S08SH16CTJ |
|---|---|---|---|---|---|
| Package | 20-TSSOP | 20-TSSOP - same | 20-TSSOP - same | 20-TSSOP - same | 20-TSSOP - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core / Max Frequency | S08, 40 MHz | S08, 40 MHz | S08, 40 MHz | S08, 40 MHz | S08, 40 MHz |
| Flash Memory | 8 KB | 8 KB | 8 KB | 4 KB | 16 KB |
| ADC | 12-ch, 10-bit, 2.5 us | 12-ch, 10-bit, 2.5 us | 12-ch, 10-bit, 2.5 us | 12-ch, 10-bit | 12-ch, 10-bit |
| Supply Voltage | 3.3 V / 5 V | 3.3 V / 5 V | 3.3 V / 5 V | 3.3 V / 5 V | 3.3 V / 5 V |
| Lifecycle Status | NRND | NRND (same family) | NRND (same family) | NRND (same family) | NRND (same family) |
Principaux différenciateurs
- Larger flash headroom for growing firmware (vs MC9S08SH4CTJ)
- Lowest-cost entry in the pin-compatible family (vs MC9S08SH16CTJ)
- Full memory-map compatibility across the SH family (vs MC9S08SH8MTJ)
Notes de conception
The MC9S08SH8CTJ is NRND on the NXP product page. Do not start new designs on this part; design in a successor (S08SG family) or plan a family migration to pin-compatible SH4/SH16 variants to spread supply risk. Sign up for NXP Product Change Notices for the official discontinuance schedule and last-time-buy deadline before it is announced, and qualify at least one alternative on your AVL now.
The S08SH family is a 5V-range design; decouple VDD with a 0.1uF ceramic capacitor placed within a few millimeters of the pin, plus a bulk 4.7uF-10uF capacitor per board. During flash programming/erase, current draw increases - verify your regulator can supply the peak. If mixing 5V S08 logic with 3.3V peripherals, remember that GPIO output-high levels follow VDD and level shifting or current-limited series resistors may be needed on shared buses.
The BDM debug interface shares pins with general-purpose I/O; route the BKGD/RESET traces to a 4-6 pin debug header on every production PCB even when programming is done at final test, because in-circuit firmware updates on installed equipment depend on BDM access. Keep analog ADC input traces short and away from the PWM/timer switching lines to preserve the 10-bit ADC's effective resolution, and use a solid ground plane under the 20-TSSOP footprint.
Informations de conformité
NXP product page includes an Environmental Quality section but specific RoHS/REACH status for this ordering code was not present in the retrieved data. Consult the NXP Environmental pages for the exact certificate.
