MC908GT8CBE - 8MHz 8KB Flash 8-Bit MCU | NXP | 42-PDIP
部品番号: MC908GT8CBE ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
MC908GT8CBE 概要
An 8-bit microcontroller is a compact embedded controller used to execute firmware, read sensors, control actuators, and manage communication or timing functions. In the hierarchy of electronic components, the MC908GT8CBE belongs to the MCU -> microcontroller -> embedded processor -> semiconductor category. Its HC08 architecture and modest 8 MHz clock position it for cost-sensitive embedded control rather than high-throughput processing.
The verified listing specifies FLASH memory of 8 KB, an 8-bit core, and 8 MHz operation. Other listings identify an 8x8-bit ADC, 34 I/O, and a 42-pin through-hole package. The available source material does not provide a complete, consistent set of electrical limits such as RAM, supply voltage range, ADC timing, peripheral configuration, or absolute maximum ratings, so those parameters remain marked as data needed rather than inferred.
Typical engineering uses for this device family include basic embedded control, keypad and display interfaces, simple motor or relay sequencing, industrial modules, and low-cost controller boards. The 42-pin package provides a practical through-hole footprint for prototyping and legacy industrial equipment, although it is physically larger than modern surface-mount MCU packages.
Because the MC908GT8CBE is reported as obsolete or EOL in one verified source, replacement planning should begin by checking availability and pin-level compatibility rather than assuming that a functionally similar MCU is drop-in compatible. The listed alternatives include family members and comparison candidates, but the supplied data does not verify five pin-compatible drop-in substitutes, so they are not promoted as guaranteed replacements.
ドロップイン代替品: MC908GT8CBE — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: MC908GT8CBE （同一形状・フットプリント） — 相違点: Package, Core Architecture, Mounting Type, Maximum Clock Frequency, Program Memory Size.
クイック比較ツール — 並列比較する代替部品を選択:
MC908GT16CBE
✅ ドロップイン✓ 在庫あり
価格はお問い合わせください
データシートを見る →MC68HC908GT8CFB
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MC68HC908GT16CFB
✅ ドロップイン✓ 在庫あり
$5.21 / 個
データシートを見る →ATMEGA8515L-8PU
✅ ドロップイン✓ 在庫あり
$4.1 / 個
データシートを見る →MC9S08DZ60ACLH
✓ 在庫あり
$5.1 / 個
データシートを見る →MC908GT8CBE 最大定格＆電気的特性
| Core Processor | HC08 |
| Architecture | 8-bit |
| 最大クロック周波数 | 8 MHz |
| Program Memory Size | 8 KB (8K x 8) |
| Program Memory Type | FLASH |
| Number of I/O | 34 I/O |
| ADC Resolution | 8 bits |
| ADC Configuration | 8 x 8-bit converter |
| 動作温度範囲 | -40°C to +85°C |
| パッケージ | 42-pin PSDIP |
| Terminal Count | 42 pins |
| 実装タイプ | Through-hole |
| Package Shape | Rectangular |
| ライフサイクル状態 | Obsolete (EOL) |
| Series | HC08 |
MC908GT8CBE rectangular ピン配置ガイド
MC908GT8CBE (rectangular パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: MC908GT8CBE.
詳細は データシート をご参照ください。
主な用途
MC908GT8CBE の用途: 6 件s: Legacy industrial controller, Basic keypad and display interface, Simple motor and relay sequencing, Sensor signal conditioning and monitoring, Appliance and instrumentation control, Through-hole prototype and repair board.
Legacy industrial controller
The MC908GT8CBE fits maintenance of legacy industrial-control boards that were built around an HC08 8-bit controller and a through-hole footprint. Its verified 8 MHz operating speed is sufficient for supervisory logic, discrete input scanning, and actuator sequencing when the original firmware does not require a higher-performance CPU. The 42-pin PSDIP package can simplify repair work on through-hole assemblies, but the exact pinout, supply limits, and peripheral assignment must be confirmed from the original datasheet. Because the device is reported as obsolete or EOL, replacement procurement should prioritize tested inventory and schematic-level equivalence.
おすすめ
Basic keypad and display interface
The MC908GT8CBE can be used for a basic keypad, LED, or character-display controller when the interface is intentionally modest and the application depends on established HC08 firmware. The 34 reported I/O provide a meaningful peripheral and control-pin budget for buttons, indicators, and display-control signals, while the 8-bit architecture simplifies direct bit-level logic. The available data does not specify the exact port multiplexing or timing, so the designer should verify whether the chosen display and keypad drivers fit the device's actual pin functions before layout release.
おすすめ
Simple motor and relay sequencing
An MC908GT8CBE-based controller can implement deterministic relay sequencing, stepper-command generation, or small motor-control state machines for legacy equipment. Its 8 MHz clock provides enough execution margin for many supervisory loops, and the reported 34 I/O can support control signals, status LEDs, limit inputs, and external drivers. The component should not be assumed to directly drive motors; external transistors, drivers, protection, and appropriate power grounding are normally required. Verify current ratings, timing, and pin multiplexing against the exact HC08 datasheet.
おすすめ
Sensor signal conditioning and monitoring
The MC908GT8CBE is a candidate for basic sensor monitoring where an 8-bit ADC and an 8-bit CPU are sufficient for thresholding, filtering, or digital status reporting. The verified comparison listing identifies an 8x8-bit converter, which is appropriate for coarse measurements but not for high-resolution instrumentation. A practical design would use the ADC only after confirming input range, sampling behavior, reference voltage, and acquisition timing in the exact datasheet. Analog signal conditioning and sensor excitation also require separate protection and filtering components.
おすすめ
Appliance and instrumentation control
The MC908GT8CBE can support appliance controls, test fixtures, and compact instrumentation modules that require deterministic embedded logic rather than high computational throughput. Its FLASH memory is listed as 8 KB, so application code must be sized carefully; large protocol stacks, graphics, or extensive data logging should be avoided unless the external system supplies the required memory. The 42-pin package may be advantageous for repairable legacy equipment, while modern replacements may offer smaller packages and better current sourcing.
おすすめ
Through-hole prototype and repair board
The MC908GT8CBE is well suited to a through-hole prototype or repair board when the objective is to reproduce an existing HC08 design rather than create the smallest possible PCB. Its 42-pin PSDIP package is easier to probe and hand-solder than a fine-pitch surface-mount MCU, and the 8-bit core is adequate for many control loops. However, the package occupies substantial board area and the obsolete status increases procurement risk. Before building, confirm pin numbering, programming access, clock components, reset behavior, and all peripheral multiplexing against the original component documentation.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: MC908GT8CBE — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | MC908GT16CBE | MC68HC908GT8CFB | MC68HC908GT16CFB | ATMEGA8515L-8PU | MC9S08DZ60ACLH |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | Freescale Semiconductor | Freescale Semiconductor | Microchip Technology | NXP Semiconductors |
主な差別化要因
- Established HC08 family identity （vs ATMEGA8515L-8PU)
- Legacy through-hole integration （vs MC9S08DZ60ACLH)
- Verified legacy operating range （vs MC908GT16CBE)
- 8 KB FLASH configuration （vs MC68HC908GT16CFB)
設計ノート
Do not treat a family comparison or distributor cross-reference result as proof of drop-in compatibility. Before replacing MC908GT8CBE, compare the exact package drawing and pin names, then verify supply voltage, I/O levels, reset, clock, port multiplexing, ADC channels, timer resources, serial interfaces, and programming assumptions. The verified data confirms the 42-pin PSDIP and 8 MHz HC08 identity but does not provide a complete authoritative pin-to-pin comparison for the proposed alternatives.
Use the original MC908GT8CBE schematic and package drawing to preserve the 42-pin through-hole footprint. Confirm whether the board requires a socket, jumper wires, or a direct soldered replacement, and inspect the pin-1 orientation before inserting a substitute. For a new board, do not assume that a 42-pin package guarantees the same pin functions; create a cross-reference table that separates power, ground, reset, clock, I/O, analog, and programming signals.
The supplied verified excerpts do not state the MC908GT8CBE operating-voltage range or absolute maximum ratings, so the power rail must be taken from the exact datasheet before connecting it to an existing board. Check logic-level compatibility of every connected peripheral, especially if a replacement changes I/O structure or supply limits. Do not power the device from an assumed 5 V rail merely because the package is associated with a 5 V legacy listing; the cited data mentions 5 V in a secondary context but does not establish the complete electrical specification.
For a replacement in legacy equipment, route the MCU replacement only after checking oscillator placement, reset behavior, decoupling, and exposed programming or debug connections. Through-hole construction can make signal integrity less sensitive than fine-pitch designs, but long traces and poorly controlled ground returns can still affect ADC readings and communication timing. If the ADC is used, follow the exact analog-pin and reference-ground recommendations in the device documentation rather than general MCU assumptions.
コンプライアンス情報
The supplied verified web data does not provide compliance declarations for MC908GT8CBE. One verified result identifies the lifecycle status as obsolete or EOL. Compliance fields remain unknown rather than inferred.
