NXP Semiconductors MC9S08SH16CTJR

Overview

MC9S08SH16CTJR from NXP (formerly Freescale) is an 8-bit HCS08 microcontroller with 16 KB flash, 1 KB RAM, and a 40-MHz CPU core. It integrates ADC, ACMP, SCI, SPI, I²C, TPM PWM, RTC, and a single-wire background debug interface. Designed for cost-sensitive embedded control in industrial sensors and appliance motor drives.

For engineers reviewing the MC9S08SH16CTJR datasheet, MC9S08SH16CTJR pinout, MC9S08SH16CTJR application, or MC9S08SH16CTJR equivalent, key selection criteria include flash size, stop3-mode peripheral operation, internal clock source (ICS) accuracy (±2% over voltage/temperature), and TSSOP-28 package compatibility with legacy SH-series layouts.

Technical Context

The MC9S08SH16CTJR implements the S08CPUV3 core with HC08 instruction set plus BGND, supporting up to 32 interrupt/reset sources. Its ICS module delivers bus frequencies from 2 MHz to 20 MHz using FLL with internal reference trimming (0.2% resolution, ±2% deviation).

Peripherals operate across power modes: ADC and ACMP remain functional in stop3 mode; RTC runs on 1-kHz internal oscillator in all modes; SCI supports LIN master break generation and wake-up; TPM modules provide edge- or center-aligned PWM with input capture and output compare.

Key Specifications

Pinout & Package

MC9S08SH16CTJR is housed in a 28-pin Thin Shrink Small Outline Package (TSSOP) with 0.65 mm pitch, JEDEC MO-153 compliant, and thermal pad omitted. Pin functions align with MC9S08SH32 series pin assignment per datasheet Rev. 3 Section 2.1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08SH16CTJR, MC9S08SH32CTJR offers double flash capacity with zero hardware change, while S9KEAZ128AMLH provides architectural modernization at the cost of full requalification - making the former ideal for incremental upgrades and the latter for next-generation platforms.

Availability

MC9S08SH16CTJR is available at Aetrix Electronics and suitable for industrial sensor nodes, home appliance motor control, smart metering, and medical device interfaces requiring stable component supply and long-lifecycle support.

Supply support for MC9S08SH16CTJR 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

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications.

The MC9S08SH16CTJR belongs to the HCS08 family - designed specifically for cost-optimized, ultra-low-power embedded control in resource-constrained environments where flash density, debug simplicity, and mixed-signal integration are critical.

FAQ

What is the maximum operating frequency of the MC9S08SH16CTJR CPU core?

The MC9S08SH16CTJR features an HCS08 CPU core rated for up to 40 MHz operation. This maximum frequency is achievable when the internal clock source (ICS) is configured to deliver a 20 MHz bus clock with appropriate prescaling, as the CPU executes one instruction per bus cycle in most cases. The actual sustained frequency depends on system clock configuration, voltage, and temperature conditions specified in the electrical characteristics table.

Does the MC9S08SH16CTJR support in-circuit debugging, and what interface is used?

Yes, the MC9S08SH16CTJR supports in-circuit debugging via a single-wire background debug interface using the BKGD/MS pin. This interface enables breakpoint setting, real-time register inspection, and memory access without halting peripheral operation. The on-chip debug module includes an 8-deep FIFO for trace data and supports both tag and force breakpoints - all accessible through standard Freescale/NXP BDM tools.

Can the MC9S08SH16CTJR ADC operate in low-power stop modes?

Yes, the MC9S08SH16CTJR ADC remains fully functional in stop3 mode - the deepest low-power state. It supports hardware-triggered conversions, automatic compare, and temperature sensor readings while drawing minimal current. This capability is confirmed in Section 9.4.7 of the MC9S08SH32 Series Data Sheet (Rev. 3), which explicitly covers MC9S08SH16 functionality.

What clock sources are available for the MC9S08SH16CTJR, and how accurate is the internal option?

The MC9S08SH16CTJR supports two primary clock sources: an external crystal/resonator via XTAL/EXTAL pins (31.25 kHz–16 MHz), and the internal clock source (ICS) module with FLL. The ICS achieves ±2% bus clock accuracy over full operating voltage and temperature ranges, with 0.2% resolution via factory trimming - eliminating need for external timing components in many applications.

Is the MC9S08SH16CTJR pin-compatible with other devices in the SH-series?

Yes, the MC9S08SH16CTJR in TSSOP-28 package shares identical pinout with MC9S08SH32CTJR and MC9S08SH8CTJR per the shared MC9S08SH32 Series Data Sheet (Rev. 3). This allows direct substitution within the same package variant, preserving PCB layout and interconnect design while scaling flash capacity or adjusting feature sets.