NXP Semiconductors MC9S08SH4CTGR

Overview

MC9S08SH4CTGR from Freescale Semiconductor is an 8-bit HCS08 microcontroller with 4 KB Flash, 256 B RAM, and 24-QFN package. It features a 40-MHz CPU, internal clock source (ICS) supporting 2–20 MHz bus frequencies, 12-channel 10-bit ADC, and real-time counter (RTC) with on-chip 1-kHz low-power oscillator - used in industrial sensor nodes and motor control interfaces.

For engineers reviewing the MC9S08SH4CTGR datasheet, MC9S08SH4CTGR pinout, MC9S08SH4CTGR application, or MC9S08SH4CTGR equivalent, key selection criteria include Flash endurance (100k erase/write cycles), stop3-mode operation with ADC/ACMP/RTC active, and single-wire background debug interface for space-constrained embedded designs.

Technical Context

The MC9S08SH4CTGR implements the S08CPUV2 core with HC08 instruction set plus BGND, supports up to 32 interrupt/reset sources, and uses SuperFlash® technology for reliable in-system programming over full voltage (2.7–5.5 V) and temperature (−40 °C to 125 °C) ranges.

Its ICS module includes a frequency-locked loop (FLL) with precision-trimmed internal reference (0.2% resolution, ±2% deviation), enabling stable bus clocks without external crystal - critical for cost-sensitive consumer and automotive body electronics where component count reduction matters.

Key Specifications

Pinout & Package

MC9S08SH4CTGR is housed in a 24-pin QFN (Quad Flat No-lead) package with 4×4 mm body and 0.5 mm pitch. The exposed thermal pad improves thermal dissipation in high-duty-cycle applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with MC9S08SH4CTGR, MC9S08SH8CTGR offers double Flash/RAM with zero hardware change, whereas S9KEAZ128AMLH delivers 32-bit scalability at the cost of full re-design - making MC9S08SH4CTGR optimal for cost-sensitive, memory-constrained legacy-compatible implementations.

Availability

MC9S08SH4CTGR is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body electronics, and consumer appliance timers requiring stable component supply and long-term lifecycle support.

Supply support for MC9S08SH4CTGR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Freescale Semiconductor (now part of NXP Semiconductors) is a global semiconductor company specializing in microcontrollers, analog, and connectivity solutions for automotive, industrial, and consumer markets.

The MC9S08SH series targets cost-optimized, low-power embedded control applications - designed for systems needing robust Flash reliability, integrated analog peripherals, and minimal external components.

FAQ

What is the maximum operating frequency of the MC9S08SH4CTGR?

The MC9S08SH4CTGR supports a maximum CPU frequency of 40 MHz, achieved via its internal clock source (ICS) with frequency-locked loop (FLL). This allows sub-25 ns instruction execution times and meets real-time deadlines in motor control and sensor polling applications. The actual bus frequency depends on ICS configuration but ranges from 2 MHz to 20 MHz under specified voltage and temperature conditions. MC9S08SH4CTGR maintains timing integrity across its full −40 °C to 125 °C operating range.

Does the MC9S08SH4CTGR support in-circuit debugging?

Yes, the MC9S08SH4CTGR includes a single-wire background debug interface compliant with Freescale's BDM specification. It supports breakpoint setting, on-chip emulation (ICE), and real-time register inspection without halting system operation. The interface uses only the BKGD/MS pin and requires no dedicated debug header - reducing PCB footprint. MC9S08SH4CTGR also provides two additional hardware breakpoints within its on-chip debug module for advanced trace analysis.

What power-saving modes does the MC9S08SH4CTGR offer?

The MC9S08SH4CTGR provides three low-power modes: Wait, Stop2, and Stop3. Stop3 is the deepest, drawing less than 1 µA while keeping RTC, ADC, and ACMP operational - enabling periodic wake-up without external circuitry. All modes retain RAM contents and support wake-up via IRQ, RTC overflow, or ACMP event. MC9S08SH4CTGR's low-voltage detect (LVD) circuit further enhances reliability by triggering reset or interrupt when supply drops below programmable thresholds.

Can the MC9S08SH4CTGR operate without an external crystal?

Yes, the MC9S08SH4CTGR can operate entirely without an external crystal thanks to its integrated Internal Clock Source (ICS) module. The ICS uses a precision-trimmed internal reference oscillator and FLL to generate stable bus clocks from 2 MHz to 20 MHz. Crystal pins (XTAL/EXTAL) are optional and may be left unconnected. MC9S08SH4CTGR's internal 1-kHz low-power oscillator also powers the RTC in Stop3 mode - eliminating all external timing components in many applications.

What is the Flash endurance rating for the MC9S08SH4CTGR?

The MC9S08SH4CTGR features 4 KB of on-chip Flash memory rated for 100,000 erase/write cycles and data retention exceeding 20 years at 85 °C. This endurance is guaranteed across the full operating voltage range (2.7–5.5 V) and temperature range (−40 °C to 125 °C). MC9S08SH4CTGR supports burst programming and block protection to safeguard critical firmware sections - essential for field-upgradable industrial and automotive devices.