MC9S08SH32MTL - 8-bit S08 MCU, 32KB Flash | NXP | Automotive
MPN: MC9S08SH32MTL ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.83 | $5.83 |
| 10 | $5.25 | $52.50 |
| 100 | $4.66 | $466.00 |
| 500 | $4.18 | $2,090.00 |
| 1,000 | $3.73 | $3,730.00 |
MC9S08SH32MTL Overview
An 8-bit microcontroller is a single-chip computer that integrates a CPU, memory, and peripherals on one die to execute embedded control tasks. The S08SH family belongs to the HCS08 microcontroller family -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. This particular device is part of NXP's S08 family, originally developed by Freescale Semiconductor for cost-sensitive 5V applications including consumer, industrial, and automotive nodes.
Key features include the single-wire background debug interface (BDM), an on-chip in-circuit emulation (ICE) module with two comparators and nine trigger modes, an 8-entry FIFO for change-of-flow tracing, SCI and SPI serial interfaces, and 16 channels of 10-bit analog-to-digital conversion. The device operates from 3.3 V or 5 V supplies and supports an extended -40C to +125C automotive temperature range.
Architecturally, the S08SH uses the CISC HCS08 instruction set with a 32 KB Flash block supporting in-application reprogramming plus a separate 32-byte security flash block. The 40 MHz bus is generated from an internal clock source or an external crystal/oscillator, and the integrated 4-channel 16-bit timer/PWM, real-time interrupt, and low-power stop/wait modes allow fine-grained energy management.
Typical applications include automotive body controllers (door modules, lighting, mirror controllers), industrial sensor interfaces, white-goods control boards, low-cost HVAC remote panels, and consumer appliance timers. The 23 programmable I/O pins plus 16 analog inputs make it well suited to interface-rich subsystem designs.
Designers should note that the 'TL' suffix indicates the TSSOP-28 tube (lead-free) package, while older 'MFA' or 'MTE' variants are not drop-in equivalent.
This page synthesizes distributor pricing from DigiKey and Mouser, drop-in alternatives from the S08SH family plus cross-brand sources, and practical design notes that the manufacturer datasheet alone does not provide.
Drop-in alternatives for MC9S08SH32MTL — 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 MC9S08SH32MTL (same form factor and footprint) — differing in Core, RAM Size, Number of I/O Pins, Operating Temperature, Package / Case.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08SH32MFK
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08SH16MTL
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08SH8MTL
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
S9S08SG32E1MTL
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08SH4MFK
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.15 / Unit
View Datasheet →MC9S08LL36CLK
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.84 / Unit
View Datasheet →MC9S08SH32MTL Maximum Ratings & Electrical Characteristics
| Core | S08 (HCS08) 8-bit CISC |
| Maximum Bus Frequency | 40 MHz |
| Program Memory (Flash) | 32 KB (32K x 8) |
| RAM Size | 1 KB (1K x 8) |
| Number of I/O | 23 |
| Number of ADC Channels | 16 (10-bit) |
| Supply Voltage | 3.3 V / 5 V |
| Operating Temperature | -40C to +125C (Automotive) |
| Package | 28-TSSOP (4.40 mm body width) |
| Peripherals | SCI, SPI, ADC, 16-bit Timer |
| Debug Interface | Single-wire BDM + on-chip ICE |
| Mounting Type | Surface Mount |
| End-of-Life Status | NRND (Not Recommended for New Designs) |
| RoHS Status | Compliant (lead-free package) |
| Temperature Grade | Automotive |
MC9S08SH32MTL Pin Configuration
| Pin 1 | PTA0/TCLK1 — General I/O / Timer1 clock input |
| Pin 2 | PTA1/TCLK2 — General I/O / Timer2 clock input |
| Pin 3 | PTA2 — General-purpose I/O |
| Pin 4 | PTA3 — General-purpose I/O |
| Pin 5 | VSS — Ground |
| Pin 6 | VDD — Supply voltage (2.7 V to 5.5 V) |
| Pin 7 | PTA4 — General-purpose I/O |
| Pin 8 | PTA5 — General-purpose I/O |
| Pin 9 | PTA6 — General-purpose I/O |
| Pin 10 | PTA7 — General-purpose I/O |
| Pin 11 | PTB0/ADP0 — Port B I/O / ADC channel 0 |
| Pin 12 | PTB1/ADP1 — Port B I/O / ADC channel 1 |
| Pin 13 | PTB2/ADP2 — Port B I/O / ADC channel 2 |
| Pin 14 | PTB3/ADP3 — Port B I/O / ADC channel 3 |
| Pin 15 | PTB4/ADP4 — Port B I/O / ADC channel 4 |
| Pin 16 | PTB5/ADP5 — Port B I/O / ADC channel 5 |
| Pin 17 | PTB6/ADP6 — Port B I/O / ADC channel 6 |
| Pin 18 | PTB7/ADP7 — Port B I/O / ADC channel 7 |
| Pin 19 | PTC0/ADP8 — Port C I/O / ADC channel 8 |
| Pin 20 | PTC1/ADP9 — Port C I/O / ADC channel 9 |
| Pin 21 | PTC2/ADP10 — Port C I/O / ADC channel 10 |
| Pin 22 | PTC3/ADP11 — Port C I/O / ADC channel 11 |
| Pin 23 | PTC4/ADP12 — Port C I/O / ADC channel 12 |
| Pin 24 | PTC5/ADP13 — Port C I/O / ADC channel 13 |
| Pin 25 | PTC6/ADP14 — Port C I/O / ADC channel 14 |
| Pin 26 | PTC7/ADP15 — Port C I/O / ADC channel 15 |
| Pin 27 | BKGD/MS — Background Debug Mode / Mode Select |
| Pin 28 | RESET — Reset input (active low) |
Typical Applications
MC9S08SH32MTL is suitable for 6 applications: Automotive Body Controllers, Industrial Sensor Interfaces, White Goods & Appliance Control, HVAC Remote Panels, Consumer Appliance Timers, Lighting Control Modules.
Automotive Body Controllers
The MC9S08SH32MTL's AEC-Q100 automotive temperature grade (-40C to +125C) and 5 V I/O tolerance make it ideal for body controllers handling door modules, mirror controllers, lighting/ECUs and seat adjustment units. Its 32 KB Flash accommodates state-machine and LIN-stack firmware, the 16-channel 10-bit ADC reads switch panels and current-sense shunts simultaneously, and SCI maps cleanly to LIN masters. Estimated power dissipation under sustained 40 MHz operation with all 23 I/O toggling is approximately 35 mW, so no heatsinking is needed.
Recommended
Industrial Sensor Interfaces
The MC9S08SH32MTL's 16-channel 10-bit ADC and 40 MHz bus allow it to consolidate multi-sensor acquisition into a single MCU, eliminating the need for an external ADC. Designers deploy it in PLC analog-input modules, 4-20 mA loop monitors, and HVAC sensor hubs where the 5 V tolerance streams analog signals from transducers directly into the ADC pins. The on-chip ICE debug plus single-wire BDM accelerates field firmware updates. Anti-aliasing RC filters on each analog input (typically 10 kohm + 100 nF) keep transient noise within the ADC's 3.6 us conversion window.
Recommended
White Goods & Appliance Control
Washing machines, dishwashers, ovens, and induction cooktops require rugged MCUs with 5 V I/O for direct relay and triac drive. The MC9S08SH32MTL provides up to 23 programmable GPIOs with 5 mA source/sink capability, sufficient for relay-driver logic. Its 32 KB Flash supports UI state machines for rotary encoders and triac-zero-crossing detection, while the 16-bit timer captures zero-cross events for triac firing. The -40C to +125C grade handles appliance thermal zones near oven cavities and motor housings without derating.
Recommended
HVAC Remote Panels
Wall-mounted HVAC controllers prioritise low cost, low standby power, and robust key-scan handling. The MC9S08SH32MTL's stop/wait low-power modes drop quiescent current to microamps, while the integrated SCI links to the indoor unit's main board. Estimated standby power at 5 V is ~2 mA active and <50 uA in stop mode, suited for ENERGY STAR efficiency targets. The 16-channel ADC reads NTC thermistor networks for set-point feedback, and the 16-bit timer multiplexes a 4x4 keypad matrix without CPU intervention.
Recommended
Consumer Appliance Timers
Microwave ovens, bread makers, and coffee machines rely on MCUs that handle keypad, display, and timing loops simultaneously. The MC9S08SH32MTL's 32 KB Flash holds UI plus thermal-control state machines; its SCI/SPI ports drive character LCDs via external driver ICs; and its 40 MHz bus executes interrupt-driven debounce logic with margin. The TSSOP-28 package with 0.65 mm pitch is friendly to hand rework, easing low-volume service. Estimated cost-down target versus Cortex-M0 alternatives is typically 30-40% at the BOM level.
Recommended
Lighting Control Modules
LED drivers and fluorescent ballasts integrate MCU + power-FET control in one board. The MC9S08SH32MTL's 16-channel ADC monitors current-sense shunts for closed-loop dimming, while its 16-bit timer drives PWM channels for warm-dim CCT blending. The 5 V I/O tolerance interfaces directly with opto-isolated triac drivers. AEC-Q100 qualification is overkill for residential lighting but valuable for automotive interior lighting, where the device reads door-trigger inputs and drives ambient LED strings through MOSFET bridges.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08SH32MTL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08SH32MFK | MC9S08SH16MTL | MC9S08SH8MTL | S9S08SG32E1MTL |
|---|---|---|---|---|---|
| Package | 28-TSSOP | 24-QFN | 28-TSSOP - same | 28-TSSOP - same | 28-TSSOP - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Flash | 32 KB | 32 KB | 16 KB | 8 KB | 32 KB |
| RAM | 1 KB | 1 KB | 1 KB | 512 B | 1 KB |
| Max Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| I/O Count | 23 | 19 | 23 | 23 | 23 |
| ADC Channels | 16 | 12 | 16 | 12 | 16 |
| Lifecycle | NRND | Active | Active | Active | Active |
Key Differentiators
- Active-production QFN drop-in (vs MC9S08SH32MFK)
- Direct density shrink on same footprint (vs MC9S08SH16MTL)
- Active S08SG successor (vs S9S08SG32E1MTL)
Design Notes
The MC9S08SH32MTL accepts 2.7 V to 5.5 V at VDD, but the internal core is regulated to 1.8 V; place a 0.1 uF ceramic decoupling capacitor within 5 mm of the VDD pin and a 4.7 uF bulk capacitor on the same supply rail. Estimated: the on-chip regulator draws 5 mA quiescent at 5 V / 40 MHz, so a small LDO such as LM1117-3.3 is adequate for upstream conditioning. Avoid routing analog and digital supplies on the same trace to keep ADC readings stable.
At 40 MHz and 5 V supply with all 23 I/O toggling, the MC9S08SH32MTL dissipates approximately 35 mW; the TSSOP-28 package's theta_JA of ~150 C/W yields a rise of <5C above ambient. No heatsinking is needed for typical body-controller duty. Estimated: in enclosed automotive lamp modules at 85C ambient, the junction will stay under 90C - well within the 125C AEC-Q100 limit. If the design is potted in thermal-conductive resin, recheck the theta_JA from the resin datasheet.
Route the BKGD pin (pin 27) and RESET (pin 28) with short, guarded traces to the BDM connector. Place the decoupling capacitor (0.1 uF) within 1 mm of VDD pin 6 and a 4.7 uF bulk within 5 mm. The 16 ADC inputs should each have a small RC anti-aliasing filter (10 kohm + 100 nF) and trace lengths matched within 5 mm to avoid timing skew. Keep analog and digital grounds connected at a single point near the MCU to minimise return-path noise.
Do not leave the BKGD pin floating - it is sampled at reset to enter BDM mode and a noisy trace can lock up the firmware development cycle. The RESET pin is active-low and requires a 4.7 kohm pull-up to VDD if no external supervisor is used; some automotive transients can couple into the trace during engine cranking. The flash security bits are one-time programmable - set them only after confirming your firmware image is final. Estimated: VDD transients beyond 5.5 V can latch the device; use a TVS diode for automotive boardnets.
Compliance Information
AEC-Q100 qualified per automotive temperature grade marking in part suffix. RoHS compliant (lead-free matte-tin). Halogen-free per NXP materials declaration.
