MSP430F1491IPM - 16-bit 8MHz 60KB Flash MCU | Texas Instruments
部品番号: MSP430F1491IPM ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $11.2 | $11.20 |
| 10 | $10.1 | $101.00 |
| 100 | $8.95 | $895.00 |
| 500 | $7.8 | $3,900.00 |
| 1,000 | $6.9 | $6,900.00 |
MSP430F1491IPM 概要
An ultra-low-power MCU is a microcontroller optimized to minimize energy consumption per instruction and per active hour. Within the power-management hierarchy of embedded systems, the MSP430 family from Texas Instruments sits at the ultra-low-power end of the 16-bit microcontroller category, complementing the 32-bit ARM-class devices where battery life, not raw throughput, is the dominant requirement. The MSP430F1491 belongs to the MSP430x1xx generation, combining the CPU16 RISC core with five low-power operating modes.
Key features include the 16-bit RISC CPU16 core executing at up to 8 MHz, 60KB of on-chip FLASH plus 256B of calibration memory, 2KB of SRAM, two hardware USART serial ports, and an integrated hardware multiplier that accelerates math-heavy sensing code. The device also integrates a 12-bit ADC with internal reference, a supply voltage supervisor, and a watchdog timer, reducing external component count in battery-powered designs.
Architecturally, the MSP430x1xx uses a von Neumann memory map with 16-bit registers and constant-generator cycles that compress code density. The five low-power modes (LPM0 through LPM4) allow sub-microamp standby currents; the CPU wakes in well under a microsecond from LPM modes, enabling burst-style processing that dramatically extends battery life in portable measurement applications.
Typical applications include battery-powered portable instrumentation, utility metering front ends, industrial sensor transmitters, and handheld measurement equipment where the combination of 60KB FLASH, 2KB RAM, two USARTs, and the hardware multiplier covers both signal acquisition and communication tasks.
When designing, budget the 8 MHz CPU carefully: move filter and scaling math to the hardware multiplier, and place the system into the deepest feasible LPM state between wakeups to maximize battery life.
This page synthesizes distributor inventory data, drop-in same-family alternatives, and practical low-power design notes not consolidated in the manufacturer datasheet.
ドロップイン代替品: MSP430F1491IPM — 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: MSP430F1491IPM （同一形状・フットプリント） — 相違点: Comparator, Package, Supply Voltage Range.
クイック比較ツール — 並列比較する代替部品を選択:
MSP430F169IPM
✅ ドロップイン ⚠️ 仕様未検証✓ 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 →MSP430F1612IPM
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MSP430F1611IPM
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MSP430F148IPM
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MSP430F149IPM
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$7.5 / 個
データシートを見る →MSP430F147IPM
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$5.18 / 個
データシートを見る →MSP430F1491IPM 最大定格＆電気的特性
| Core Processor | MSP430 CPU16 (16-bit RISC) |
| Core Size | 16-bit |
| 最大クロック周波数 | 8 MHz |
| Flash Memory | 60KB (60K x 8 + 256B) |
| RAM Size | 2KB |
| Peripherals | 2 USART + HW multiplier |
| ADC Resolution | 12-bit |
| Number of ADC Channels | 8 |
| Comparator | Yes |
| Supply Voltage Range | 1.8 V to 3.6 V (MSP430F14x family) |
| Low-Power Modes | LPM0 to LPM4 (5 modes) |
| パッケージ | 64-LQFP (10x10 mm) |
| 実装タイプ | Surface Mount |
| Series | MSP430x1xx |
| RoHS ステータス | Compliant |
MSP430F1491IPM 64-lqfp (10x10 mm) ピン配置ガイド
MSP430F1491IPM (64-lqfp (10x10 mm) 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: MSP430F1491IPM.
詳細は データシート をご参照ください。
主な用途
MSP430F1491IPM の用途: 6 件s: Battery-Powered Portable Instrumentation, Utility Metering (Energy/Water/Gas), Industrial Sensor Transmitters, Handheld Medical and Health Monitoring Devices, Data Loggers and Remote Monitoring Nodes, Building Automation and HVAC Controllers.
Battery-Powered Portable Instrumentation
The MSP430F1491IPM fits portable measurement equipment because its five low-power modes and fast wake-up let the 8 MHz CPU16 core sleep between measurements, directly extending battery life. The 12-bit ADC samples sensor channels with an internal reference, while the hardware multiplier performs RMS, scaling, and calibration math without CPU-cycle-heavy software multiply routines. In a handheld DMM front end, the device wakes from LPM3, takes a burst of ADC conversions, computes the reading, updates the LCD via SPI/USART, and returns to sleep in milliseconds. The 60KB FLASH holds the full measurement, calibration, and UI codebase with headroom, and the 2KB RAM buffers waveform samples. This burst-processing pattern is the classic MSP430 use case TI designs the family for.
おすすめ
Utility Metering (Energy/Water/Gas)
Metering designs choose the MSP430F1491IPM for its combination of metrology-grade analog and communication peripherals in one 3V device. The 12-bit ADC with 8 input channels digitizes shunt or transformer signals for energy measurement, while the integrated hardware multiplier accelerates the multiply-accumulate chains required for RMS power and accumulated energy calculations at 8 MHz. The two hardware USARTs simultaneously drive an optical/IR communication port and an RS-485 or M-Bus interface to the data concentrator. The 60KB FLASH stores metering firmware, tariff tables, and event logs, and the 256B calibration segment holds factory constants. Because metering products have 15-20 year service lives, verifying long-term supply and qualifying a same-footprint family alternative is essential engineering practice.
おすすめ
Industrial Sensor Transmitters
Loop-powered 4-20 mA and HART transmitters benefit from the MSP430F1491IPM's ultra-low-power profile, because total loop budget is often under 3.5 mA. The MCU spends most of its time in LPM modes, waking to sample pressure, temperature, or flow sensors through the 12-bit ADC, then computing linearization using the hardware multiplier. One USART handles HART FSK modem communication while the other services diagnostics or a local interface. The 60KB FLASH accommodates the sensor compensation tables, HART protocol stack, and self-diagnostics without external memory. Its 1.8V-3.6V family supply range pairs naturally with low-dropout regulation from the loop. Industrial transmitters also value the watchdog timer and supply voltage supervision integrated on-chip for functional robustness.
おすすめ
Handheld Medical and Health Monitoring Devices
Battery-operated medical measurement devices such as glucose meters, pulse oximeters, and portable vital-sign monitors use the MSP430F1491IPM because its low sleep currents maximize battery replacement intervals, a key usability factor in home-health products. The 12-bit ADC captures analog biosensor outputs, and the hardware multiplier accelerates digital filtering and ratio computations such as SpO2 R/IR processing. The 60KB FLASH supports signal processing chains, calibration, and user-interface logic, while one USART connects to Bluetooth-class or USB bridge modules for data upload. Fast CPU wake-up supports event-driven sampling triggered by sensor detection. For medical designs, the device's long field history and stable documentation simplify regulatory design-history files compared with rapidly cycling parts.
おすすめ
Data Loggers and Remote Monitoring Nodes
Standalone data loggers leverage the MSP430F1491IPM's five low-power modes to run for months or years on primary cells while periodically sampling environmental or machine parameters. The MCU wakes from LPM3 on timer or external interrupt, samples the 12-bit ADC channels, applies scaling math via the hardware multiplier, and appends records to FLASH or an external EEPROM through one USART in SPI mode. A second USART interfaces a GSM/LoRa-class modem for periodic upload, and 60KB FLASH holds acquisition logic plus compression routines while 2KB RAM buffers records between uploads. The device's supply voltage supervisor detects weak batteries before data loss, and the comparator can threshold alarm inputs without waking the CPU, further reducing average current draw.
おすすめ
Building Automation and HVAC Controllers
Zone controllers, thermostats, and actuator interfaces use the MSP430F1491IPM to combine low standby power with adequate control throughput. The 12-bit ADC reads temperature, humidity, and setpoint inputs; Timer_B PWM outputs (available on P4 port pins) drive triac, relay, or valve actuation with hardware timing independent of CPU load. The two USARTs support RS-485 Modbus RTU on one port and an service/configuration port on the other, while 60KB FLASH stores schedule tables, PID control loops, and protocol firmware. The hardware multiplier accelerates PID and linearization arithmetic at the 8 MHz CPU16 clock. Its 3V operation simplifies isolated-supply design on RS-485 networks, and sleep-mode current suits battery-backup thermostat form factors.
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: MSP430F1491IPM — 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 | MSP430F169IPM | MSP430F1612IPM | MSP430F148IPM | MSP430F147IPM |
|---|---|---|---|---|---|
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Flash Memory | 60KB + 256B | 60KB + 256B | 55KB + 256B | 48KB + 256B | 32KB + 256B |
| RAM | 2KB | 2KB | 2KB | 2KB | 2KB |
| Max Clock Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
| Serial Interfaces | 2 USART | 2 USART | 2 USART | 2 USART | 2 USART |
| Hardware Multiplier | Yes | Yes | Yes | Yes | Yes |
| Series Generation | MSP430F14x1 (1xx) | MSP430F16x (1xx) | MSP430F16x (1xx) | MSP430F14x (1xx) | MSP430F14x (1xx) |
主な差別化要因
- Largest FLASH in the same drop-in footprint among F14x siblings （vs MSP430F148IPM)
- F14x1-series variant with same memory as F149 but distinct peripheral configuration （vs MSP430F149IPM)
- Simplicity advantage over F16x family alternatives （vs MSP430F169IPM)
- No cross-brand pin-compatible alternative exists （vs N/A)
設計ノート
Estimated: design the power budget around the five low-power modes. If the application spends 99% of its time in LPM3 with the 32 kHz crystal running and wakes for 10 ms every second at ~300 uA active-class current, average current is dominated by the LPM3 floor plus wake/execute energy: roughly 2.5 uA (sleep) + 3 uA (10 ms duty at 300 uA) ≈ 5-6 uA average, before peripherals. Verify exact active and LPM currents in the MSP430F14x family datasheet electrical characteristics table for your supply voltage and clock configuration, and size the battery from those measured figures.
Place a 100 nF ceramic decoupling capacitor directly at each DVCC/AVCC pin pair with a short return to DVSS/AVSS, and keep the analog ground (AVSS) connected to a quiet star point rather than sharing high-current digital return paths. On the 64-LQFP 10x10 mm footprint, route the XT1/XT2 crystal traces short and guard them with ground pour to limit stray capacitance, since crystal load capacitance directly affects the DCO/FLL and timer accuracy. Tie unused ADC inputs (P6.x) to AVSS or configure them as outputs to prevent floating-input mid-rail current.
Two frequent mistakes with MSP430F1xx parts: (1) forgetting the TEST/SBWTCK pin configuration, which can lock out JTAG access if the bootstrap loader wiring conflicts with the JTAG header - always bring TEST, TCK, TMS, TDI, TDO and RST/NMI to a standard 14-pin JTAG header for debug access. (2) Exceeding the FLASH erase/write endurance budget by using main FLASH as a data log without wear management; use the separate 256B calibration/information segment for small persistent parameters and add an external EEPROM such as the X5325 for high-write datasets.
The two USARTs on this device support UART and SPI but not hardware I2C; if a design needs I2C plus UART simultaneously, bit-bang I2C on port pins using Timer_A for timing, or select an F16x-family alternative with the same footprint. When bit-banging, keep SCL below ~100 kHz to stay within interrupt jitter tolerance at 8 MHz CPU clock. For RS-485 links, enable the USART idle-line multiprocessor mode to reduce CPU interrupt load, and use the hardware multiplier in signed MAC mode for CRC-free framing checks.
コンプライアンス情報
RoHS-compliant LQFP package per TI product listing. REACH, halogen-free, and conflict-minerals declarations should be confirmed via TI's official environmental certificate for this exact part number.
