MC9S08SH4MTG - 8-bit MCU, 4KB Flash, 40MHz, 16-TSSOP | NXP
MPN: MC9S08SH4MTG ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.11 | $6.11 |
| 10 | $5.5 | $55.00 |
| 100 | $4.95 | $495.00 |
| 500 | $4.45 | $2,225.00 |
| 1,000 | $4 | $4,000.00 |
MC9S08SH4MTG Overview
An 8-bit microcontroller (MCU) integrates a processor core, program memory, data RAM, and peripherals such as timers, ADCs, and serial interfaces on a single chip. Within the embedded systems hierarchy, it sits below 32-bit MCUs in complexity and cost, making it the workhorse for simple control tasks, appliance logic, and board-level supervision where a full application processor is unnecessary.
Key features of the MC9S08SH4MTG include the 40MHz HCS08 CPU executing the HC08 instruction set with an added BGND instruction, 4KB of on-chip flash program memory with in-circuit reprogrammability, and support for up to 32 interrupt/reset sources. The S08SH family is pin, tool, and software compatible with the S08SG family, giving designers migration headroom within the same footprint. Supply operation spans the 3.3V/5V range with an operating voltage window of approximately 2.7V to 5.5V.
Technical depth: the device integrates an analog comparator and a 12-channel, 10-bit ADC with a 2.5 microsecond conversion time, an automatic compare function, and an on-chip temperature sensor. The built-in clock generator removes the need for an external crystal in many designs, reducing BOM cost. Debugging is handled through the single-wire background debug interface (BGND).
Typical applications include 5V industrial sensing nodes leveraging the 10-bit ADC and temperature sensor, low-cost appliance and consumer appliance control, and system supervision or auxiliary control in larger boards. The 16-TSSOP package with gull-wing terminals suits compact, hand-solderable and reflowable designs.
Design consideration: note that NXP lists this part as NRND (Not Recommended for New Designs), so new projects should evaluate the compatible S08SG successors or newer Kinetis/LPC parts while legacy production can continue sourcing existing stock.
This page synthesizes distributor pricing, drop-in alternatives, lifecycle status, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for MC9S08SH4MTG — 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 MC9S08SH4MTG (same form factor and footprint) — differing in Package, RAM, Core Processor, Lifecycle Status, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08SE8MTG
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.74 / Unit
View Datasheet →MC9S08SH4MTG Maximum Ratings & Electrical Characteristics
| Core Processor | HCS08 (S08 core) |
| Core Size | 8-bit |
| Maximum CPU Frequency | 40 MHz |
| Flash Memory | 4 KB (4K x 8) |
| RAM | 512 B |
| Instruction Set | HC08 with added BGND instruction |
| Interrupt/Reset Sources | Up to 32 |
| ADC Resolution | 10-bit |
| ADC Channels | 12-channel |
| ADC Conversion Time | 2.5 us |
| Analog Comparator | Yes |
| On-chip Temperature Sensor | Yes |
| Operating Voltage Range | 2.7 V to 5.5 V (3.3V/5V operation) |
| Package | 16-TSSOP (0.173", 4.40mm width) |
| Mounting Type | Surface Mount (gull-wing terminals) |
| Family Compatibility | Pin, tool and software compatible with S08SG |
| Lifecycle Status | NRND (Not Recommended for New Designs) |
MC9S08SH4MTG 16-tssop (0.173", 4.40mm width) Pin Configuration Guide
Pin configuration for MC9S08SH4MTG (16-tssop (0.173", 4.40mm 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 MC9S08SH4MTG.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S08SH4MTG is suitable for 6 applications: 5V Industrial Sensing Nodes, Low-Cost Appliance and Consumer Control, System Supervision and Auxiliary Control, Automotive Body and Convenience Modules (legacy), Battery-Powered Portable Devices, Analog Front-End and Comparator-Based Monitoring.
5V Industrial Sensing Nodes
The MC9S08SH4MTG fits 5V industrial sensing nodes because its 12-channel 10-bit ADC with 2.5 microsecond conversion time, automatic compare function, analog comparator, and on-chip temperature sensor operate natively on the same 5V rail that powers industrial transducers, eliminating level-shifting between the sensor and MCU. In a typical node, analog channels feed the ADC directly while the comparator provides fast over-threshold trips without CPU intervention; the automatic compare function generates interrupts when a reading crosses a programmed limit. Placed on a compact 16-TSSOP footprint with an internal clock generator, the design omits external oscillators and reference components. The trade-off is that the 4KB flash bounds the firmware, so filtering and protocol stacks must be kept lean.
Recommended
Low-Cost Appliance and Consumer Control
Cost-sensitive appliance control is a natural fit for the MC9S08SH4MTG: the S08SH family was created by NXP specifically as a low-end 5V-range option, and the device integrates everything a small appliance board needs - 40MHz HCS08 core, 4KB flash, 512B RAM, 10-bit ADC, comparator, and internal clock generator - in a 16-TSSOP package that keeps the PCB area and assembly cost minimal. Button inputs, LED indicators, relay or triac drive outputs, and a temperature-sensor loop for thermostatic control all map onto its peripherals. Because the internal oscillator removes the crystal, the bill of materials shrinks further. The main consideration is the NRND status: for new appliance platforms, start with a currently-active S08 successor and treat the SH4 as a maintenance fit only.
Recommended
System Supervision and Auxiliary Control
In larger systems the MC9S08SH4MTG serves as a housekeeping controller: monitoring power-supply voltages through the 10-bit ADC and comparator, sequencing rails, driving status LEDs, and handling front-panel buttons while the main processor runs the application. Support for up to 32 interrupt/reset sources lets it react quickly to fault flags, and the wide 2.7V to 5.5V supply range lets it ride on the same 5V or 3.3V standby rail as the rest of the supervision circuitry. The single-wire background debug interface (BGND) allows field-friendly firmware updates during production. Because it sleeps between supervisory tasks, average power stays low. Confirm the watchdog and low-voltage detect behavior in the datasheet against your safety requirements.
Recommended
Automotive Body and Convenience Modules (legacy)
Distributor data (Partstack) classifies the MC9S08SH4MTG temperature grade as AUTOMOTIVE, and the 5V-native S08SH design suits legacy 12V-vehicle body electronics where simple, robust 5V logic is standard: door modules, seat-adjust memory, lighting switches, and wiper control. The 10-bit ADC reads potentiometer position sensors directly, the comparator flags over-current or over-temperature events, and the 40MHz HCS08 core handles the modest control loops these functions need. The 16-TSSOP gull-wing package reflows reliably on automotive PCB assemblies. However, with NXP marking the part NRND and a replacement PCN published, automotive Tier-1s should design in the announced successor or the active S08S12/Kinetis automotive families for new programs and use this part only for running production.
Recommended
Battery-Powered Portable Devices
Although the S08SH targets 5V systems, its 2.7V floor and S08-family low-power modes let the MC9S08SH4MTG run in battery products at 3V logic levels, monitoring cell voltage through the ADC and temperature sensor while an internal clock generator keeps the BOM light. Typical roles include handheld meter front-ends, remote controls with analog keypads, and portable instrumentation where the 10-bit ADC and automatic compare wake the MCU only when a threshold is crossed, stretching battery life. The compact 16-TSSOP supports slim handheld PCBs. The design constraint is flash capacity: 4KB forces tight, often assembly-level firmware. For new portable designs, the S08SE or S08PT families with more flash and dedicated low-power modes are the better starting point.
Recommended
Analog Front-End and Comparator-Based Monitoring
The MC9S08SH4MTG doubles as a mixed-signal monitor where its analog comparator and 12-channel 10-bit ADC form a low-cost front-end: battery chargers using voltage and temperature windows, over-voltage/under-voltage watchdogs on 5V rails, and simple motor or heater current monitoring through a shunt. The ADC's 2.5 microsecond conversion time supports brisk polling loops, the automatic compare function offloads threshold detection from software, and the on-chip temperature sensor provides a free die-level thermal reading for derating logic. Outputs can drive PWM for fan or heater control directly from the S08 timer channels. Keep firmware under the 4KB flash budget by using the comparator interrupt rather than continuous ADC sampling; this also cuts average current draw significantly.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08SH4MTG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08SE8MTG |
|---|---|---|
| Package | 16-TSSOP | 16-TSSOP - same |
| Brand | NXP Semiconductors | NXP Semiconductors - same |
| Core / Frequency | HCS08, 40 MHz | HCS08, 40 MHz |
| Flash Memory | 4 KB | 8 KB |
| RAM | 512 B | 512 B |
| Operating Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| ADC | 12-ch, 10-bit, 2.5 us | 12-ch, 10-bit, 2.5 us |
Key Differentiators
- 5V-native analog integration (vs MC9S08SE8MTG)
- Flash headroom in the same footprint (vs MC9S08SE8MTG)
- Family-level tool and software compatibility (vs MC9S08SE8MTG)
Design Notes
Treat the MC9S08SH4MTG as a maintenance part, not a new-design part. The official NXP product page marks it NRND with a Discontinuance and Replacement Product Change Notice published, so new PCB releases should target the announced successor or an active S08 family member such as the S08SE/S08SG. For running production, place a last-time-buy sized to your field-service horizon (typically 5-10 years) and qualify MC9S08SE8MTG as the same-footprint fallback before stock runs out.
Decouple VDD with a 0.1 uF ceramic capacitor placed within a few millimeters of the supply pin, plus a bulk 4.7-10 uF capacitor per board rail. The 2.7V to 5.5V operating window tolerates unregulated 5V supplies with sag, but verify the low-voltage reset threshold in the datasheet if the rail can dip below 2.7V during brownout events. When running from 3.3V, confirm ADC reference options since full-scale accuracy depends on the selected reference configuration.
The 10-bit ADC is only as accurate as its analog environment: keep sensor traces short, route them away from the PWM and clock lines, and add an RC anti-aliasing filter (for example 1 k ohm and 10 nF, giving roughly 1.6 kHz cutoff) ahead of analog inputs carrying slow signals. The on-chip clock generator relaxes layout compared to crystal designs, but if you do use an external oscillator for UART accuracy, follow the crystal layout guidance in the S08 family hardware design notes.
Compliance Information
Compliance details are not stated in the provided verified data. Partstack lists the temperature grade as AUTOMOTIVE, but formal AEC-Q100 qualification is not stated in the data. See the NXP product page Environmental Quality section for official compliance declarations.
