MC9S08QB4CTG - S08 8-bit MCU, 4KB Flash, 20MHz CPU | NXP
部品番号: MC9S08QB4CTG ⚠ ラストタイムバイ| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.28 | $228.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.82 | $1,820.00 |
MC9S08QB4CTG 概要
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, volatile RAM, and a fixed set of peripheral modules such as timers, ADCs, communication interfaces, and GPIO. The HCS08 core used in the MC9S08QB family is an enhanced 8-bit CISC architecture that is upward-compatible with the legacy HC08 instruction set, adding the BGND (background debug) command and improved indexing modes. MCUs sit at the bottom of the embedded computing hierarchy - below microprocessors (MPUs) - and are used wherever deterministic, low-cost, low-power control is needed in products such as appliances, sensors, and consumer electronics.
Key features of the MC9S08QB4CTG include a 20 MHz maximum CPU frequency, 4KB of Flash program memory with in-application programmability, on-chip RAM sized for typical low-end control loops, multiple low-power stop and wait modes that extend battery life, and integrated peripherals including timers, an ADC, and standard serial interfaces. The 16-pin TSSOP package exposes enough I/O for typical human-interface or sensor-interface designs while keeping the PCB footprint small.
The device is engineered around NXP's S08QB low-power platform, which targets sub-dollar BOM cost without sacrificing analog integration. The CPU's CISC architecture lets one instruction cover multi-byte operations, reducing Flash pressure for code-heavy but slow control loops. Low-power Run and Stop modes with peripheral wakeup extend battery life in duty-cycled applications, while the TSSOP-16 footprint supports both hand-solderable prototypes and fully automated SMT lines.
Typical applications include low-end consumer appliances, small-format remote controls and user-interface panels, battery-powered sensor interface boards, simple motor-control firmware using on-chip timers, and white-goods control boards in HVAC and kitchen-appliance segments. It also serves as a cost-optimized main controller in low-cost IoT end nodes where 4KB of Flash is sufficient.
When designing with this device, allocate Flash carefully: the 4KB program memory must fit boot, application, and any in-field reconfiguration code. Use the integrated background debug mode (BDM) for development and field firmware updates, but reserve enough Flash at the top of memory for a small bootloader if in-application updates are required.
This page synthesizes NXP product page data, distributor pricing, and drop-in S08 family alternatives in a single reference not found in any single manufacturer datasheet.
ドロップイン代替品: MC9S08QB4CTG — 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: MC9S08QB4CTG （同一形状・フットプリント） — 相違点: Package, RAM, Core, Instruction Set, Operating Temperature Range.
クイック比較ツール — 並列比較する代替部品を選択:
MC9S08QB8CWGR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MC9S08QB4CWG
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MC9RS08KB8CWJ574
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$0.74 / 個
データシートを見る →MC9S08QD4CSC
✅ 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 →S9S08SG4E2CTJ
✅ ドロップイン✓ 在庫あり
$1.85 / 個
データシートを見る →MC9S08QB4CTG 最大定格＆電気的特性
| CPU Core | S08 (HCS08, 8-bit CISC) |
| Maximum CPU Frequency | 20 MHz |
| Program Memory (Flash) | 4 KB (4K x 8) |
| Operating Voltage Range | 1.8 V to 3.6 V |
| 動作温度範囲 | -40C to +85C |
| パッケージ | 16-pin TSSOP |
| 実装タイプ | Surface Mount |
| On-chip Debug | Background Debug Mode (BDM) |
| RoHS ステータス | Compliant |
| Lead-Free | Yes |
MC9S08QB4CTG ピン構成
| ピン 1 | VDD — Supply voltage (1.8 V to 3.6 V) |
| ピン 2 | VSS — Ground reference |
| ピン 3 | BKGD/MS — Background Debug Mode / Mode Select |
| ピン 4 | RESET — Reset input, active-low |
| ピン 5 | IRQ/TCLK — External interrupt / Timer clock |
| ピン 6 | PTA0 — General-purpose I/O / peripheral channel |
| ピン 7 | PTA1 — General-purpose I/O / peripheral channel |
| ピン 8 | PTA2 — General-purpose I/O / peripheral channel |
| ピン 9 | PTA3 — General-purpose I/O / peripheral channel |
| ピン 10 | PTA4 — General-purpose I/O / peripheral channel |
| ピン 11 | PTB0 — General-purpose I/O / peripheral channel |
| ピン 12 | PTB1 — General-purpose I/O / peripheral channel |
| ピン 13 | PTB2 — General-purpose I/O / peripheral channel |
| ピン 14 | PTB3 — General-purpose I/O / peripheral channel |
| ピン 15 | PTB4 — General-purpose I/O / peripheral channel |
| ピン 16 | PTB5 — General-purpose I/O / peripheral channel |
主な用途
MC9S08QB4CTG の用途: 6 件s: Low-Cost Consumer Appliance Control, Remote Control and HMI Panels, Battery-Powered Sensor Interface Nodes, Simple Motor and Relay Control, White-Goods and HVAC Control Boards, Low-Cost IoT End-Nodes.
Low-Cost Consumer Appliance Control
The MC9S08QB4CTG fits low-end consumer appliance controllers such as coffee makers, hand-mixer drivers, and small kitchen gadgets where 4 KB of Flash is sufficient for the state machine and timing logic. Its 1.8 V to 3.6 V supply range lets the design run directly from a 3.3 V LDO or two alkaline cells, reducing BOM cost. The integrated 16-pin TSSOP footprint minimizes board area in tight-form-factor products, and the 20 MHz HCS08 core delivers enough headroom to service timers, ADC conversions, and serial peripherals for a complete appliance platform without external logic.
おすすめ
Remote Control and HMI Panels
Remote controls and small human-machine-interface panels benefit from the MC9S08QB4CTG's small TSSOP-16 footprint and low-power S08 core, allowing direct battery operation from coin cells or two AA cells. The HCS08 CISC architecture keeps the keypad scanning and IR transmit code small enough to comfortably fit in the 4 KB Flash budget. The integrated timers and serial peripherals handle PWM-driven LCD backlight control and IR carrier generation. With Stop and Wait modes dropping current to microampere levels, the design can sit idle for months between user interactions.
おすすめ
Battery-Powered Sensor Interface Nodes
Battery-powered wireless sensor nodes using the MC9S08QB4CTG leverage its 1.8 V operation and low-power Stop modes to extend battery life into the multi-year range. The HCS08 core wakes on timer or external interrupts, reads an analog or digital sensor, and transmits via an external RF transceiver controlled by GPIO/SPI, then returns to sleep. The 4 KB Flash comfortably fits a simple duty-cycled sensor + transmit routine, while the TSSOP-16 package fits on the small PCBAs typical of these nodes. This application is one of the most common S08QB-family use cases.
おすすめ
Simple Motor and Relay Control
Small brushed-DC, stepper, or relay-based actuators in white goods, HVAC accessories, and garage-door peripherals are well served by the MC9S08QB4CTG. The 20 MHz HCS08 core runs a PWM timer firmware stack in 4 KB Flash, while on-chip peripherals drive FET bridges via GPIO, ADC, and timer channels. The 16-pin TSSOP-16 footprint offers enough I/O for two motor half-bridges plus sensor feedback and a serial interface, and the 1.8 V to 3.6 V supply range simplifies interface to 3.3 V gate drivers. Designers can upgrade to MC9S08QB8 for additional firmware headroom.
おすすめ
White-Goods and HVAC Control Boards
Control boards inside white goods such as washing-machine sub-modules, dishwasher user interfaces, and HVAC accessories frequently pair an MC9S08QB4CTG with the main appliance MCU. The 8-bit controller handles user-input scanning, display multiplexing, sensor pre-processing, and simple safety timers. Its 4 KB Flash fits standard appliance-control code, and the -40C to +85C operating range covers under-cabinet and attic-mounted HVAC environments. The TSSOP-16 package suits both hand-built and high-volume SMT manufacturing.
おすすめ
Low-Cost IoT End-Nodes
Cost-driven IoT end nodes such as connected-temperature sensors, leak detectors, and occupancy beacons are a sweet spot for the MC9S08QB4CTG where the ARM Cortex-M0 class would inflate BOM cost beyond the target. The S08 core executes the duty-cycled sensor read-and-transmit firmware inside 4 KB Flash, and the integrated low-power modes with Wake-Up on interrupt keep the average current low enough for a coin-cell battery. The 16-pin TSSOP-16 leaves enough I/O for a serial interface to the RF transceiver, a temperature/humidity sensor, and a status LED.
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: MC9S08QB4CTG — 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 | MC9S08QB8CWGR | MC9S08QB4CWG | MC9RS08KB8CWJ | MC9S08QD4CSC | S9S08SG4E2CTJ |
|---|---|---|---|---|---|---|
| Package | 16-pin TSSOP | 16-pin TSSOP-equivalent (WGR) | 16-pin TSSOP | 16-pin TSSOP-equivalent | 16-pin SOIC-equivalent (CS package) | 20-pin TSSOP-equivalent |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| CPU Core | S08 (HCS08), 8-bit | S08 (HCS08), 8-bit | S08 (HCS08), 8-bit | RS08, 8-bit (reduced instruction set) | S08 (HCS08), 8-bit | S08 (HCS08), 8-bit |
| Maximum CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | Higher than 20 MHz (QD family) | 20 MHz |
| Program Memory (Flash) | 4 KB | 8 KB | 4 KB | 8 KB | 4 KB | 4 KB |
| Operating Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.0 V to 3.6 V (typical QD family) | 1.8 V to 3.6 V (typical SG family) |
| Lifecycle Status | Last-Time-Buy (LTB) | Check NXP - same family EOL context | Last-Time-Buy (same die as MC9S08QB4CTG) | Active | Active per NXP product page | Active |
| Approximate Unit Price (1 pc) | $2.85 | Higher (double Flash at parity grade) | Similar to MC9S08QB4CTG (same die) | Site list candidate - confirm distributor | Similar S08 entry-level band | Site list candidate - confirm distributor |
主な差別化要因
- 4 KB Flash fits entry-level BOM targets （vs MC9S08QB8CWGR)
- Tight TSSOP-16 footprint for compact designs （vs MC9S08QD4CSC)
- S08 CISC core maintains HC08 legacy code compatibility （vs MC9RS08KB8CWJ)
設計ノート
The MC9S08QB4CTG operates from 1.8 V to 3.6 V per NXP. Decouple VDD/VSS with a 100 nF ceramic cap placed within 5 mm of the VDD pin, plus a bulk 1-10 uF cap near the regulator output. For battery operation from two alkaline cells, derive VDD from a low-quiescent LDO with < 5 uA Iq to preserve battery life; the S08 core itself enters low microampere Stop modes.
Estimated Flash budget: with 4 KB total Flash, reserve at least 0.5 KB at the top of memory for a small bootloader if in-application updates are planned. BDM (Background Debug Mode) on the BKGD/MS pin is essential for development and field programming; do not pull BKGD high or low permanently without accounting for debug access. Watch STOP current at high-temperature corners - confirm Stop-mode Iq in the NXP datasheet for your application.
For TSSOP-16 packages, the typical theta_JA of ~100-150 C/W on a 1-oz 1 square-inch copper pad is sufficient for low-power MCU designs that dissipate well under 100 mW. At 20 MHz CPU frequency, the internal power is typically in the low single-digit mW range; no heatsink or copper pour extension is required beyond a standard ground-connected thermal pad area.
コンプライアンス情報
RoHS compliance inferred from DigiKey distribution listings and NXP product category. Halogen-free and conflict-minerals status not stated in verified web snippets - confirmed via NXP environmental documentation if material.