MC9S08QL8CTJ - 8KB Flash 20MHz 8-bit MCU | NXP
N.º da peça: MC9S08QL8CTJ ✓ AtivoMC9S08QL8CTJ Visão geral
An 8-bit microcontroller is a compact processor architecture designed to execute control, sensing, and communication tasks with relatively simple firmware. The MC9S08QL8CTJ belongs to the S08QL low-power MCU family, where the S08 core combines deterministic control operation with energy-conscious features. Its position in the hierarchy is microcontroller, embedded processor, semiconductor, and integrated circuit.
The principal benefits of this device include 8 KB of programmable flash, an 8-bit CISC-based S08 core, operation from a 1.8 V to 3.6 V supply, and a maximum clock frequency of 20 MHz. The internal clock source reduces external clock-component requirements, while voltage detection supports board-level monitoring and protection. The 20-pin TSSOP package also supports compact, surface-mounted PCB layouts.
The MC9S08QL8CTJ is intended for applications where a compact controller must manage sensors, actuators, user inputs, and low-speed serial interfaces. Its 8 KB flash capacity is most useful for small control loops and tightly scoped firmware rather than graphics, extensive data storage, or protocol-heavy gateways. The 1.8 V to 3.6 V operating range suits battery-sensitive and energy-efficient portable products.
Typical uses include battery-operated monitoring devices, simple industrial sensor nodes, compact appliance controls, security and access modules, and low-power industrial automation products. Its low-cost architecture and small flash footprint make it appropriate when the firmware performs direct control rather than intensive computation.
PCB design should preserve the required power and decoupling structure around the TSSOP device while keeping sensitive routes away from fast-switching nodes. Firmware capacity should be monitored because the 8 KB flash also holds the boot code, application logic, constants, and configuration values. Confirm peripheral assignments and pin multiplexing against the manufacturer datasheet before finalizing the board layout.
This page organizes the MC9S08QL8CTJ electrical characteristics, application guidance, compatibility limits, and procurement information into a concise engineering reference. It also distinguishes a verified same-family replacement from cross-package or functionally similar devices that are not true drop-in choices.
Alternativas drop-in para MC9S08QL8CTJ — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
MC9S08QL8HCTJ
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
MC9S08QL8CTJ Classificações máximas e características elétricas
| Product Type | 8-bit S08 microcontroller |
| Maximum CPU Clock Frequency | 20 MHz |
| Flash Memory | 8 KB |
| Flash Organization | 8K x 8 bits |
| Operating Supply Voltage Range | 1.8 V to 3.6 V |
| Internal Clock Source | Internal clock source |
| Voltage Detection | Supported |
| Instruction Architecture | 8-bit CISC |
| Encapsulamento | 20-pin TSSOP, 4.40 mm width |
| Terminal Count | 20 terminals |
| Package Shape | Rectangular |
| Lead Form | Gull wing |
| Tipo de montagem | Surface mount |
Guia de Configuração de Pinos do MC9S08QL8CTJ rectangular
Configuração de pinos para MC9S08QL8CTJ (pacote rectangular). Este CI digital inclui GPIO, interfaces de comunicação (UART, SPI, I2C) e pinos de alimentação. Consulte o datasheet do fabricante para funções alternativas dos pinos e opções de configuração. Essencial para projeto de sistemas embarcados e layout de PCB.
Nenhum dado detalhado de pinagem disponível para MC9S08QL8CTJ.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
MC9S08QL8CTJ é adequado para 6 aplicaçãos: Battery-Powered Sensor Node, Industrial Sensor Interface, Compact Appliance Controller, Security and Access Module, Portable Measurement Device, Low-Power Automation Node.
Battery-Powered Sensor Node
The MC9S08QL8CTJ fits battery-powered sensor nodes because its S08QL low-power architecture operates from 1.8 V to 3.6 V and includes an internal clock source. With 8 KB of flash, the controller can manage acquisition logic, threshold decisions, status flags, and a compact state machine without requiring a large external storage device. The 20-pin TSSOP package preserves board area in compact products. Designers should place local bypass capacitance close to the supply pins, use the manufacturer’s pin-description table when mapping sensor and communication signals, and calculate average current from the actual duty cycle rather than relying only on active-mode frequency.
Recomendado
Industrial Sensor Interface
The MC9S08QL8CTJ is suitable for industrial sensor interfaces where an 8-bit controller must translate digital inputs, control actuators, and maintain local diagnostics. Its 8 KB flash capacity supports a focused firmware image, while the 1.8 V to 3.6 V operating range permits integration with low-voltage sensor and logic rails. The 20 MHz maximum clock rating provides adequate control bandwidth for typical polling and signal-conditioning tasks. Industrial equipment should still provide surge protection, input filtering, and grounding appropriate to the installation. Firmware should include timeout handling and safe-state behavior so a sensor fault cannot leave an actuator in an undefined condition.
Recomendado
Compact Appliance Controller
The MC9S08QL8CTJ can serve as the primary controller in a compact appliance where a dedicated MCU must manage buttons, indicators, relays, and a small sequence of operating states. The S08 core’s 8-bit architecture and 8 KB flash are appropriate for straightforward embedded control, and the 20-pin TSSOP package supports automated surface-mount assembly. Because flash must hold both program code and constant data, engineers should reserve space for boot handling, calibration values, and future revisions. Use the datasheet’s alternate-function tables when assigning multiplexed pins, and isolate inductive loads physically from sensitive control traces to reduce switching transients.
Recomendado
Security and Access Module
The MC9S08QL8CTJ is practical for a compact access-control or security module that coordinates a keypad, indicator, lock relay, and status feedback. Its 8 KB flash is sufficient for a focused state machine and fixed protocol handling when detailed event logging is offloaded or limited. Operation across a 1.8 V to 3.6 V supply range supports low-voltage logic integration, while the internal clock source simplifies the base design. Security implementations must add appropriate tamper response, fail-safe outputs, and authenticated communication where required. The controller should not be treated as a cryptographic boundary unless dedicated security functions and an appropriate certification process are implemented.
Recomendado
Portable Measurement Device
The MC9S08QL8CTJ supports portable measurement devices that combine a small display, a sensor, and simple local data processing within a constrained power budget. Its 1.8 V to 3.6 V operating range aligns with low-energy system rails, and the 8 KB flash can hold a compact measurement routine, calibration constants, and communication state logic. The 20-pin TSSOP package leaves board space for the sensing and display circuitry. For accurate readings, analog conditioning and reference design must be evaluated separately from the MCU. Digital layout should keep display and switching-supply traces away from sensitive measurement inputs, while firmware should use averaging or filtering appropriate to the noise environment.
Recomendado
Low-Power Automation Node
The MC9S08QL8CTJ can act as a low-power automation node for distributed equipment where each endpoint handles a small amount of local control and communicates status to a higher-level controller. Its 8-bit S08 core is well matched to simple I/O tasks, while the internal clock and 8 KB flash limit external component and firmware overhead. The 1.8 V to 3.6 V supply range supports integration into compact control boards, and the 20-pin TSSOP package allows a small footprint. Deployment planning should include watchdog recovery, communication retry behavior, input debouncing, and safe outputs. These measures are essential because unattended nodes must continue operating correctly after transient faults or power interruptions.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MC9S08QL8CTJ — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | MC9S08QL8HCTJ |
|---|---|---|
| Package | 20-TSSOP | 20-TSSOP - same footprint |
| Brand | NXP Semiconductors | NXP Semiconductors |
| Product Type | 8-bit S08 microcontroller | 8-bit S08 microcontroller |
| Flash Memory | 8 KB | 8 KB |
Principais diferenciais
- Compact low-voltage MCU with integrated timing support (vs MC9S08QL8HCTJ)
- Direct PCB reuse within the S08QL family (vs MC9S08QL8HCTJ)
- Purpose-built low-power embedded-control positioning (vs MC9S08QL8HCTJ)
Notas de projeto
Connect the supply pins to a stable 1.8 V to 3.6 V rail and place the recommended local bypass capacitors directly beside the corresponding power and ground pins. Separate sensitive analog or sensor grounding from switching-return paths where the board layout permits. Because the internal clock source can reduce external timing components, verify clock accuracy against the communication protocol, sampling timing, and watchdog requirements before omitting an external oscillator.
Use the MC9S08QL8 Series Data Sheet to assign all 20 TSSOP pins, especially pins with alternate peripheral functions. Place decoupling, programming or test access, and protection components close to their associated pins. Maintain short ground returns and avoid routing communication or switching signals beneath sensitive input areas. The 4.40 mm TSSOP body remains compact, but land-pattern compliance and paste-volume control are essential for reliable assembly.
Avoid assuming that every MCU with 8-bit architecture, 8 KB memory, or a similar clock rating is a drop-in replacement. Software peripherals, interrupt vectors, reset behavior, pin multiplexing, and electrical limits can differ even when the package is identical. The identified same-family candidate retains the 8 KB flash and 20-pin TSSOP footprint, but its temperature grade must still be compared with the final product’s environmental requirements.
Informações de conformidade
Compliance status was not stated in the product documentation excerpts. Request current environmental and material declarations through the Request a Quote form.
