NXP Semiconductors S9S08SG16E1CTG

Overview

S9S08SG16E1CTG from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 16 KB on-chip Flash, 1 KB RAM, and integrated peripherals including 10-bit ADC, dual TPM timers, SCI, SPI, I²C, ACMP, and RTC. It operates at up to 40 MHz bus frequency, supports -40°C to +125°C temperature range, and targets low-power embedded control in automotive body electronics and industrial sensors.

For engineers reviewing the S9S08SG16E1CTG datasheet, S9S08SG16E1CTG pinout, S9S08SG16E1CTG application, or S9S08SG16E1CTG equivalent, key selection criteria include Flash size (16 KB), TSSOP-16 package, 22 GPIOs, stop3 mode current (1.5 µA), and integrated LVD/LVW for robust supply monitoring in space-constrained automotive modules.

Technical Context

The S9S08SG16E1CTG implements the HCS08 CPU core with 36–40 MHz bus clock capability, supported by an Internal Clock Source (ICS) featuring a frequency-locked loop (FLL) and precision-trimmed internal reference (±0.2% resolution). Its memory map allocates 16,384 bytes of Flash (0x1860–0x7FFF), 1,024 bytes of RAM (0x0080–0x047F), and 26,528 unimplemented bytes - distinct from the SG32 variant's larger Flash allocation.

Peripheral integration includes a 16-channel 10-bit ADC with 2.5 µs conversion time and internal temperature sensor, two 2-channel TPM modules supporting PWM and input capture, and a real-time counter (RTC) with free-running 1 kHz low-power oscillator enabling wake-up from all stop modes. The device supports single-wire background debug and features FLASH block protection, COP watchdog, and configurable low-voltage detection with reset/interrupt options.

Key Specifications

Pinout & Package

Package: 16-pin TSSOP (Thin Shrink Small Outline Package), 4.4 mm × 5.0 mm body, 0.65 mm pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08SG32E1CTG, the S9S08SG16E1CTG offers identical peripheral functionality and pin compatibility but halves Flash capacity - ideal for cost-sensitive, fixed-function applications. Versus S9KEAZ128AMLH, it provides proven 8-bit determinism and lower BOM cost, though at reduced computational headroom and package footprint.

Availability

S9S08SG16E1CTG 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, long-term lifecycle assurance, and AEC-Q100-compliant silicon.

Supply support for S9S08SG16E1CTG 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 formed from the spin-off of Philips' semiconductor division, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The S9S08SG16E1CTG belongs to NXP's legacy HCS08 microcontroller family, designed specifically for cost-optimized, low-power embedded control in automotive body electronics and industrial subsystems where deterministic real-time response and Flash endurance are critical.

FAQ

What is the maximum bus frequency supported by the S9S08SG16E1CTG?

The S9S08SG16E1CTG supports a maximum bus frequency of 40 MHz when operating within its specified temperature range (-40°C to +125°C). At temperatures above 125°C, the maximum bus frequency is reduced to 36 MHz to maintain reliability. This frequency is generated via the Internal Clock Source (ICS) module's frequency-locked loop (FLL), which can be driven by either the internal trimmed reference or an external crystal/resonator. The S9S08SG16E1CTG achieves this performance while maintaining low power consumption in active and wait modes.

Does the S9S08SG16E1CTG support in-circuit debugging, and what interface is used?

Yes, the S9S08SG16E1CTG supports in-circuit debugging via a single-wire background debug interface (BDM) using the BKGD/MS pin. This interface enables full read/write access to memory and registers, breakpoint setting (one hardware breakpoint plus two more in the on-chip debug module), and flash programming without requiring additional pins or external debug hardware. The S9S08SG16E1CTG debug architecture is compatible with standard Freescale/NXP BDM tools and IDEs such as S32 Design Studio for S12Z and older CodeWarrior versions.

What is the Flash memory endurance and data retention specification for the S9S08SG16E1CTG?

The S9S08SG16E1CTG Flash memory is rated for a minimum of 100,000 program/erase cycles and guarantees 10 years of data retention at +85°C ambient temperature. These specifications apply across the full operating voltage (1.8–3.6 V) and temperature (-40°C to +125°C) ranges. Flash operations are controlled via the FCNFG, FPROT, and FCMD registers, and block protection can be configured to prevent accidental modification of bootloader or calibration data sections. The S9S08SG16E1CTG uses SuperFlash® technology licensed from SST to achieve these endurance characteristics.

How does the low-voltage detection (LVD) and low-voltage warning (LVW) function in the S9S08SG16E1CTG?

The S9S08SG16E1CTG integrates configurable low-voltage detection (LVD) with reset and low-voltage warning (LVW) with interrupt capabilities. LVD triggers a hardware reset when VDD falls below a selected threshold (e.g., 2.5 V or 2.8 V), while LVW generates a software-interrupt flag before VDD reaches the reset threshold - allowing firmware to execute safe shutdown, data save, or alert routines. Both features operate independently and are enabled via SOPT1 register bits. The S9S08SG16E1CTG guarantees functional operation between the VLVD0 threshold and VDD min (1.8 V), making it suitable for brown-out resilient designs.

Is the S9S08SG16E1CTG pin-compatible with other members of the MC9S08SGxx family?

Yes, the S9S08SG16E1CTG is fully pin-compatible with the MC9S08SG32E1CTG in the 16-pin TSSOP package, sharing identical pin assignments, electrical characteristics, and peripheral multiplexing. This allows direct substitution where Flash capacity requirements permit. However, it is not pin-compatible with 20-pin or 28-pin variants (e.g., MC9S08SG32CPB) due to differing pin counts and package footprints. The S9S08SG16E1CTG maintains the same thermal resistance (113 °C/W, single-layer board) and DC/AC electrical specs as its SG32 counterpart in the same package.