MC9S08SL8MTJ - 8-bit S08 MCU, 8KB Flash, 40MHz, 20-TSSOP | NXP
Артикул: MC9S08SL8MTJ ✓ АктивенMC9S08SL8MTJ Обзор
An 8-bit microcontroller is a compact processor with an 8-bit-wide data bus, normally built around a simple accumulator or register architecture rather than a pipelined 32-bit core. The S08 core belongs to the wider MCU hierarchy: microcontroller -> embedded processor -> general-purpose semiconductor, and it is designed for control rather than compute, using on-chip flash for firmware, on-chip RAM for working data, and dedicated peripherals for timers, serial interfaces and analog channels. Compared with 16-bit and 32-bit parts, the S08 delivers lower cost, lower current draw and smaller code footprint for typical appliance, automotive and industrial control tasks.
Key features of the MC9S08SL8MTJ include the 8 KB (8K x 8) flash program memory with fast programming, 512 bytes of RAM, a 40 MHz maximum S08 core clock, and a slave LIN interface controller for LIN bus networking. The 20-pin TSSOP package is a standard gull-wing surface-mount footprint with 20 terminals, widely supported by automated assembly and pick-and-place lines. The part is offered in an extended automotive temperature grade, making it suitable for harsh vehicle environments.
Technically, the device combines a simple 8-bit CPU with dedicated serial and timer peripherals, so most control loops are handled by hardware rather than by firmware polling. The on-chip EEPROM allows frequently changed calibration or configuration values to be written in the field without consuming flash cycles, a common requirement in automotive body electronics and in metering equipment where serial numbers or trim data must persist across power cycles.
Typical applications include LIN slave nodes in automotive body and comfort systems, small appliance controllers, fan and pump speed controllers, battery-operated handheld instruments, sensor-hub and IO expander boards, and low-cost consumer peripherals where a 20-pin surface-mount footprint and simple LIN or serial connectivity are required.
One design consideration dominates layout planning: because the flash and RAM budgets are small, firmware must stay lean, and code size should be checked against the 8 KB program memory early in the development cycle. Decoupling close to the supply pins and correct use of the reset and oscillator pins are equally important in dense 20-pin layouts.
This page combines manufacturer and distributor information, drop-in alternatives in the same 20-TSSOP footprint, and practical design notes so engineers can shortlist the correct 8-bit MCU before starting a new PCB spin.
Аналоги без доработки для MC9S08SL8MTJ — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с MC9S08SL8MTJ (тот же форм-фактор и посадочное место) — отличается по Flash Memory, Package, ADC Resolution, RAM, ADC Channels.
MC9S08SL16MTJ
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
MC9S08SL8CTJ
✅ Прямая замена ⚠️ Характеристики не провереныУточнить цену
Открыть даташит →MC9S08SH8MTJ
✅ Прямая замена ⚠️ Характеристики не провереныУточнить цену
Открыть даташит →MC9S08SH16MTJ
✅ Прямая заменаУточнить цену
Открыть даташит →MC9S08SL4MTJ
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
MC9S08SL8MTJ Максимальные параметры и электрические характеристики
| Device Type | 8-bit microcontroller (MCU) |
| Core | S08 8-bit core |
| Family | S08SL |
| Maximum CPU / Bus Clock | 40 MHz |
| Flash Memory | 8 KB (8K x 8) |
| RAM | 512 bytes |
| On-Chip EEPROM | Yes, embedded EEPROM for SLIC/LIN node configuration |
| LIN Slave Controller (SLIC) | Embedded slave LIN interface controller |
| Корпус | 20-TSSOP (SOP 20) |
| Number of Terminals | 20 |
| Terminal Form | Gull wing |
| Способ монтажа | Surface mount |
| Temperature Grade | Automotive |
| Разрядность шины данных | 8-bit |
| Статус RoHS | Compliant |
| REACH Status | Compliant |
Руководство по цоколевке MC9S08SL8MTJ в корпусе 20-tssop (sop 20)
Цоколевка для MC9S08SL8MTJ (корпус 20-tssop (sop 20)). Эта цифровая ИС включает выводы GPIO, интерфейсы связи (UART, SPI, I2C) и выводы питания. Обратитесь к техническому описанию производителя для альтернативных функций выводов и вариантов конфигурации. Необходимо для проектирования встраиваемых систем и трассировки печатных плат.
Нет подробных данных о распиновке для MC9S08SL8MTJ.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
MC9S08SL8MTJ подходит для 6 применениеs: Automotive LIN Slave Body-Control Nodes, Small Appliance and White-Goods Control, Battery-Powered Portable Instruments, Sensor Hub and IO Expander Boards, Motor and Pump Speed Control, Cost-Sensitive Consumer Peripherals.
Automotive LIN Slave Body-Control Nodes
The MC9S08SL8MTJ is built for LIN slave nodes because the S08SL family integrates a slave LIN interface controller (SLIC) and EEPROM directly on chip, removing the need for an external LIN transceiver-adjacent controller and shortening firmware bring-up. At 40 MHz the S08 core has ample headroom for symbol handling, diagnostics and periodic wake-up logic, while 512 bytes of RAM is sufficient for a small state machine plus LIN buffers. Placing it in the 20-TSSOP package keeps the module footprint small for door, seat, mirror or climate-control units where board area is tight. The automotive temperature grade further supports use in cabin and engine-bay-adjacent housings. The on-chip EEPROM is particularly useful for storing node configuration, serial numbers and calibration values that must survive power cycles.
Рекомендуется
Small Appliance and White-Goods Control
In a small appliance controller, the MC9S08SL8MTJ provides enough compute for motor sequencing, button and sensor handling, and simple closed-loop control while consuming very little board area in its 20-TSSOP package. The 40 MHz S08 core shortens the time to respond to user input and to run the periodic tasks typical of a washing cycle or fan controller. The 8 KB flash budget suits compact firmware with a bootloader and a small lookup table, and the embedded EEPROM is handy for storing cycle counters, calibration offsets and user settings across power cycles. Because the device is also suited to LIN-connected accessories, it can act as a slave endpoint in a network of appliances instead of a standalone controller.
Рекомендуется
Battery-Powered Portable Instruments
The MC9S08SL8MTJ suits portable, battery-operated instruments where every milliamp and every square millimetre matters. The 8-bit S08 core handles measurement sequencing and user-interface updates without the overhead of a 32-bit processor, and the 512-byte RAM footprint limits how much buffering a design can allocate, which keeps the firmware disciplined and the power budget predictable. In the 20-TSSOP package the device leaves room for a sensor front end, a display driver and a coin-cell or small Li-ion supply section on the same board. The on-chip EEPROM provides non-volatile storage for calibration and logged events, while the slave LIN controller allows the instrument to be daisy-chained onto an LIN network for service access or configuration from a host node.
Рекомендуется
Sensor Hub and IO Expander Boards
Used as a sensor hub or IO expander, the MC9S08SL8MTJ aggregates inputs from several low-bandwidth sensors and reports them upward over a serial link. The 8 KB flash is sufficient for a hub firmware that mainly performs sampling scheduling, filtering and data formatting, and the 40 MHz clock gives comfortable headroom for running the sensor service routines alongside the serial task. Because the device sits on a small 20-TSSOP footprint, it can be placed on a compact daughterboard or integrated behind a connector in a larger assembly. Its slave LIN capability gives the hub a standard automotive-style networking option, and the EEPROM can hold per-channel trim and calibration data that the manufacturing line writes at end-of-test.
Рекомендуется
Motor and Pump Speed Control
The MC9S08SL8MTJ is well suited to small brushed-motor and pump speed control where a dedicated motor driver IC would be excessive. The 40 MHz S08 core can run the commutation or PWM duty-cycle loop plus a supervisory task and a LIN status report within the 8 KB flash budget, and the 512-byte RAM is adequate for a single control loop with a small history buffer. Using the 20-TSSOP package alongside a discrete MOSFET stage keeps the control section compact on a crowded pump or fan board. In a vehicle or appliance context the LIN slave controller lets the speed setpoint arrive over the bus, removing local buttons and reducing wiring, and the EEPROM stores duty calibration and speed-curve coefficients that persist across power cycles.
Рекомендуется
Cost-Sensitive Consumer Peripherals
The MC9S08SL8MTJ fits cost-sensitive consumer peripherals such as small USB or serial dongles, LED controllers, timers and compact keypads where a 32-bit MCU would be unjustified. The 8-bit S08 core executes the protocol and UI logic at 40 MHz while keeping the die and package cost down, and the 20-TSSOP footprint integrates easily into a dense consumer board. The embedded EEPROM is a practical asset for storing device identity, configuration profiles or usage counters without consuming scarce flash, and the slave LIN controller provides a networking option in designs that also bridge to vehicle or industrial LIN networks. Key design checks are the 8 KB program-memory limit and the modest 512-byte RAM budget, both of which should be validated against the final firmware image before release.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для MC9S08SL8MTJ — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | MC9S08SL16MTJ | MC9S08SL8CTJ | MC9S08SH8MTJ | MC9S08SH16MTJ | MC9S08SL4MTJ |
|---|---|---|---|---|---|---|
| Package | 20-TSSOP | 20-TSSOP - same | 20-TSSOP - same | 20-TSSOP - same | 20-TSSOP - same | 20-TSSOP - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core / Architecture | S08 8-bit core | S08 8-bit core | S08 8-bit core | S08 8-bit core | S08 8-bit core | S08 8-bit core |
| Flash Memory | 8 KB (8K x 8) | 16 KB | 8 KB | 8 KB | 16 KB | 4 KB |
| Maximum Clock | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Mounting Style | Surface mount, gull wing, 20 terminals | Surface mount, 20 terminals | Surface mount, 20 terminals | Surface mount, 20 terminals | Surface mount, 20 terminals | Surface mount, 20 terminals |
Ключевые отличия
- Integrated slave LIN interface controller (SLIC) with on-chip EEPROM in a 20-pin package (против MC9S08SH8MTJ)
- Automotive temperature grade with 40 MHz S08 core (против MC9S08SL8CTJ)
- Balanced 8 KB flash footprint at a lower cost than larger same-family parts (против MC9S08SL16MTJ)
- Complete peripheral set for LIN slave nodes in a 20-pin TSSOP (против MC9S08SH16MTJ)
Заметки по проектированию
The MC9S08SL8MTJ is a 20-TSSOP device with only a few supply and ground pins, so supply routing determines noise behaviour on the whole board. Decouple each supply pin locally with a 100 nF ceramic capacitor placed within a few millimetres of the pin, and back it up with a bulk capacitor sized for the switching load of the board. Keep the analog and digital return paths converged at a single point near the device so that current from the LIN transceiver and any relay or motor stage does not flow through the MCU ground reference.
The most common failure with an 8 KB flash 8-bit MCU is discovering late that the firmware image, including bootloader, does not fit. The MC9S08SL8MTJ offers 8 KB of flash and 512 bytes of RAM, so check the compiled map file against these limits during early development rather than at release. If the image is close to the limit, move to the MC9S08SL16MTJ, which keeps the same 20-TSSOP footprint and the same slave LIN controller while doubling program memory.
Because the same S08 family is offered in 8-pin, 16-pin, 20-pin and 32-pin packages, always verify the pin-description table in the NXP datasheet against the 20-TSSOP outline before committing copper. The 20-pin TSSOP has limited escape routing, so assign the two most timing- or noise-sensitive functions to pins closest to the ground and supply connections, and keep the LIN slave lines away from switching nodes. When a LIN transceiver is used on the board, route the transceiver as close to the connector as practical and keep the MCU pins short and quiet.
Substituting a same-footprint part is only safe when the suffix meaning is respected. The MTJ ordering option of the MC9S08SL8MTJ carries the automotive temperature grade, whereas the CTJ option is the commercial-temperature variant, so the two are pin-compatible but not temperature-equivalent. Similarly, moving to an S08SH-family part such as the MC9S08SH8MTJ or MC9S08SH16MTJ removes the integrated slave LIN controller. Treat every cross-part move as a firmware and hardware re-check, not a label swap.
Информация о соответствии
RoHS and REACH compliance are recorded for the MC9S08SL8MTJ in the published part comparison records. The part is listed with an automotive temperature grade, but the AEC-Q100 qualification statement and lead-free/halogen-free declarations should be confirmed with NXP for the specific orderable part number before an automotive program release.
