NXP Semiconductors S9S08SG4E2CTJ

Overview

S9S08SG4E2CTJ from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 4 KB flash, 256 B RAM, and integrated peripherals including 10-bit ADC, analog comparator, SCI, SPI, I²C, TPM PWM timers, and RTC. It operates at up to 40 MHz CPU frequency with internal FLL clock source and supports stop3 low-power mode with peripheral wake-up capability. Used in automotive body electronics, industrial sensor nodes, and smart appliance control.

For engineers reviewing the S9S08SG4E2CTJ datasheet, S9S08SG4E2CTJ pinout, S9S08SG4E2CTJ application, or S9S08SG4E2CTJ equivalent, key selection criteria include its 16-pin TSSOP package, -40°C to 125°C operating range, single-wire BDM debug interface, and support for LIN-compliant SCI with extended break generation.

Technical Context

The S9S08SG4E2CTJ implements the HCS08 CPU core with HC08 instruction set plus BGND, supporting up to 32 interrupt/reset sources. Its internal clock source (ICS) uses a frequency-locked loop (FLL) with precision-trimmed internal reference enabling ±1.5% deviation over -40°C to 125°C and bus frequencies from 2 MHz to 20 MHz.

Peripherals include a 12-channel 10-bit ADC with 2.5 µs conversion time and temperature sensor, dual 2-channel TPM modules supporting edge- or center-aligned PWM, and real-time counter with 1 kHz on-chip oscillator for cyclic wake-up in all power modes. The device runs ADC and ACMP in stop3 mode.

Key Specifications

Pinout & Package

16-pin Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, 4.4 mm width, 1.2 mm height, 0.65 mm pitch. Pinout validated per MC9S08SG4 data sheet Rev. 8, Section 2.1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08SG8CFAE, S9S08SG4E2CTJ offers lower cost and footprint for fixed-function control; versus S9KEAZ128AMLH, it delivers proven reliability and minimal power in resource-constrained embedded roles where 8-bit determinism suffices.

Availability

S9S08SG4E2CTJ is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, smart appliance control, and medical handheld devices requiring stable component supply across extended temperature ranges.

Supply support for S9S08SG4E2CTJ 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 company formed from the spin-off of Philips' semiconductor division, now headquartered in Eindhoven, Netherlands, with R&D and manufacturing across Asia, Europe, and the Americas.

The S9S08SG4E2CTJ belongs to the legacy HCS08 microcontroller family designed for cost-sensitive, low-power, high-reliability embedded control in automotive and industrial environments where deterministic real-time response and long-term supply stability are critical.

FAQ

What is the maximum operating frequency of the S9S08SG4E2CTJ CPU core?

The S9S08SG4E2CTJ features an HCS08 CPU core rated for up to 40 MHz operation at standard temperature ranges (-40°C to 105°C). At extended temperatures above 125°C, the maximum guaranteed CPU frequency is reduced to 36 MHz per the MC9S08SG4 data sheet Rev. 8 electrical specifications. This derating ensures timing margin and reliability under thermal stress, and applies specifically to the S9S08SG4E2CTJ variant.

Does the S9S08SG4E2CTJ support LIN communication natively?

Yes, the S9S08SG4E2CTJ supports LIN 2.0/2.1 communication through its SCI module, which includes dedicated hardware for LIN master extended break generation and LIN slave extended break detection. This enables direct integration into automotive sub-networks without external LIN transceivers for basic node functionality, and is explicitly documented in the MC9S08SG4 data sheet Rev. 8 Section 14.

Can the S9S08SG4E2CTJ operate in ultra-low-power modes with ADC active?

Yes, the S9S08SG4E2CTJ supports ADC operation in stop3 mode - the deepest low-power state where the CPU and most clocks are halted but selected peripherals remain functional. The 10-bit ADC can perform conversions and trigger interrupts while consuming microamp-level current, enabling battery-powered sensing applications with long operational life. This capability is confirmed in the MC9S08SG4 data sheet Rev. 8 Section 9.4.7.

What debug interface does the S9S08SG4E2CTJ use, and is external hardware required?

The S9S08SG4E2CTJ uses a single-wire background debug mode (BDM) interface accessible via the BKGD/MS pin. Debugging requires an external BDM pod (e.g., PE Micro Cyclone or NXP DEMO9S08SG8 board), but no dedicated JTAG header or complex cabling is needed. The on-chip debug module supports one hardware breakpoint and provides full in-circuit emulation, as specified in MC9S08SG4 data sheet Rev. 8 Section 17.

Is the S9S08SG4E2CTJ pin-compatible with other MC9S08SGx devices in the same package?

Yes, the S9S08SG4E2CTJ is pin-compatible with MC9S08SG8 variants in the 16-TSSOP package (e.g., MC9S08SG8CFAE), sharing identical pin assignments, electrical characteristics, and peripheral mapping. This allows drop-in replacement where flash/RAM requirements permit, and is verified in the MC9S08SG4/SG8 data sheet Rev. 8 Section 2.1 pin assignment tables.