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Texas Instruments MSP430F1491IPMG4
- Part No.:
- MSP430F1491IPMG4
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
MSP430F1491IPMG4.pdf
- Description:
- IC MCU 16BIT 60KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,550
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Product details
Overview
MSP430F1491IPMG4 from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring 60KB flash, 2KB RAM, dual USARTs, a 12-bit ADC with 8 channels and internal reference, two 16-bit timers (Timer_A3 and Timer_B7), and a hardware multiplier - designed for battery-powered sensor systems and portable instrumentation requiring sub-6µs wake-up from standby mode.
For engineers reviewing the MSP430F1491IPMG4 datasheet, MSP430F1491IPMG4 pinout, MSP430F1491IPMG4 application, or MSP430F1491IPMG4 equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative options - all grounded in TI's SLAS272H production data sheet and official device comparison tables.
Technical Context
The MSP430F1491IPMG4 implements a 16-bit CPU with constant generators and a digitally controlled oscillator (DCO) enabling active-mode operation at 1 MHz with only 280 µA, and wake-up from LPM3 in under 6 µs. Its memory-mapped peripherals include two independent USART modules supporting UART and SPI, and a 12-bit ADC with sample-and-hold and autoscan.
It integrates Timer_B7 with seven capture/compare registers and shadow registers for PWM generation, Timer_A3 with three capture/compare registers, and an on-chip comparator. The device supports JTAG-based debugging and serial bootloader programming without external voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 125-ns instruction cycle and constant generators for optimized code efficiency |
| Flash / RAM | 60KB + 256B flash memory and 2KB RAM - sufficient for complex sensor firmware with retained state during low-power sleep |
| ADC | 12-bit SAR ADC with 8 input channels, internal reference, <10 µs conversion time, and autoscan mode for multi-sensor polling |
| Timers | Timer_A3 (3 CC registers) and Timer_B7 (7 CC registers with shadow registers) - enables simultaneous PWM, capture, and interval timing |
| Communication | Dual USARTs (USART0 and USART1), each configurable as UART or SPI - supports dual-interface sensor fusion or host-peripheral bridging |
| Power Modes | Five low-power modes including LPM3 (1.6 µA standby) and LPM4 (0.1 µA RAM retention) - extends battery life in intermittent-sampling applications |
| Supply Range | 1.8 V to 3.6 V operation - compatible with single-cell Li-ion, Li-polymer, or dual-cell alkaline power sources |
Pinout & Package
LQFP-64 package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad connected to DVSS. Pinout conforms to TI's PM package variant per Figure 4-3 and Table 4-2 (MSP430F14x1 signal set).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DVCC (Pin 1) | Digital supply voltage | Primary digital rail; requires local 100 nF decoupling to DVSS for stable core operation |
| AVCC / AVSS (Pins 64 / 62) | Analog supply rails | Isolated analog domain for ADC and comparator; must be filtered separately from DVCC/DVSS |
| P6.0–P6.7 (Pins 59–6, 2–6) | ADC analog inputs A0–A7 | Dedicated 8-channel analog front-end; support internal reference or external VeREF+/- sourcing |
| RST/NMI (Pin 58) | Reset and non-maskable interrupt | Active-low reset input; doubles as NMI source and BSL entry trigger via specific JTAG sequence |
| TCK / TMS / TDO/TDI / TDI/TCLK (Pins 57, 56, 54, 55) | JTAG test interface | Standard 4-wire JTAG for programming, emulation, and fuse control; no external voltage required |
| USART0/1 pins (e.g., P3.4/UTXD0, P3.5/URXD0, P3.6/UTXD1, P3.7/URXD1) | Serial communication I/O | Hardware UART TX/RX pairs for two independent asynchronous links - enables dual-sensor telemetry or master-slave coordination |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | 280 µA active @ 1 MHz / 2.2 V, 1.6 µA standby, 0.1 µA off-mode - enables >5-year coin-cell battery life in periodic-sensing nodes |
| Dual USART with flexible mode | Two independent serial modules, each switchable between UART and SPI - eliminates need for external level shifters or protocol bridges |
| 12-bit ADC with autoscan | Hardware-triggered channel sequencing across all 8 analog inputs - reduces CPU overhead in multi-sensor acquisition |
| Timer_B7 with shadow registers | Seven capture/compare registers plus shadow loading - ensures glitch-free PWM updates in motor control or LED dimming |
| On-chip hardware multiplier | 16×16-bit multiply-accumulate unit - accelerates filtering, FFT, or calibration math without software loops |
| Integrated comparator | Comparator_A with programmable hysteresis and output routing to timers - enables zero-crossing detection or threshold-triggered wake-up |
Applications
| Smart Utility Metering | Portable Gas Detector |
|---|---|
Use Scenario: Battery-powered residential electricity meter with voltage/current sensing, tamper detection, and RF communication. IC Role / Device Role / Timing Role: Main system controller managing ADC sampling, pulse counting, real-time clock, and UART-to-RF module handoff. Use Value: Sub-6 µs wake-up and LPM3 current of 1.6 µA enable 10+ year battery life while maintaining 1-second measurement intervals. |
Use Scenario: Handheld industrial gas analyzer using electrochemical sensors requiring precise bias control and low-noise analog readout. IC Role / Device Role / Timing Role: Sensor interface MCU acquiring analog outputs, applying temperature compensation, and formatting data for Bluetooth LE transmission. Use Value: Integrated 12-bit ADC with internal reference and autoscan eliminates external precision references and reduces BOM count by 3 components. |
| Industrial Temperature Monitor | Low-Power Data Logger |
Use Scenario: DIN-rail mounted node measuring thermocouple/RTD signals across 8 zones in HVAC or process control cabinets. IC Role / Device Role / Timing Role: Analog front-end processor with cold-junction compensation, linearization, and buffered UART output to PLC. Use Value: Dedicated A0–A7 pins with programmable gain and built-in VMID generator simplify analog signal conditioning for multiple sensor types. |
Use Scenario: Environmental logger deployed in remote locations, recording temperature/humidity/pressure every 5 minutes onto microSD card. IC Role / Device Role / Timing Role: Power-aware host MCU controlling SD card SPI interface, RTC, and deep-sleep scheduling between acquisitions. Use Value: Dual USARTs allow simultaneous SD card (SPI) and GPS module (UART) interfacing without software bit-banging or external logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F149IPM | Same core, flash, RAM, and peripheral set; differs only in LQFP-64 packaging (PM vs IPMG4 - identical mechanical form factor and pinout) | No functional difference; IPMG4 is TI's orderable part number for the same PM-package device | Select MSP430F149IPMG4 when sourcing from authorized distributors with TI's standard packaging and traceability |
| MSP430F1491IRTD | VQFN-64 (9 mm × 9 mm) package with thermal pad; identical electrical specs and pin mapping but smaller footprint and different thermal profile | Better suited for space-constrained PCBs where thermal dissipation via PCB copper is prioritized over socket compatibility | Choose MSP430F1491IRTD for compact, high-density designs; verify reflow profile and solder mask design for QFN thermal pad |
Compared with MSP430F149IPMG4, the MSP430F149IPM offers identical functionality in the same LQFP-64 package, while MSP430F1491IRTD provides identical silicon in a smaller VQFN package - enabling layout flexibility without firmware changes or peripheral reconfiguration.
Availability
MSP430F1491IPMG4 is available at Aetrix Electronics and suitable for smart utility metering, portable gas detection, and industrial temperature monitoring requiring stable component supply, long-term lifecycle assurance, and TI-authorized traceability.
Supply support for MSP430F1491IPMG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies with decades of expertise in ultra-low-power design.
The MSP430F1491IPMG4 belongs to TI's MSP430F14x1 family - engineered specifically for battery-operated measurement systems where extended runtime, precision analog integration, and rapid wake-up response are critical.
FAQ
What is the maximum operating frequency of the MSP430F1491IPMG4?
The MSP430F1491IPMG4 operates up to 8 MHz using the internal DCO or external crystals (XT1/XT2). Its 125-ns instruction cycle corresponds to a 8-MHz CPU clock, though typical active-mode usage targets 1 MHz for optimal power efficiency - delivering 280 µA at that rate per TI's SLAS272H specification.
Does the MSP430F1491IPMG4 support in-system programming without external voltage?
Yes, the MSP430F1491IPMG4 supports serial onboard programming via its built-in bootloader (BSL) using only the standard supply rails - no external programming voltage is required. This capability is confirmed in Section 1.1 and Section 6.5 of the SLAS272H datasheet and applies directly to the MSP430F1491IPMG4 variant.
How many analog input channels does the MSP430F1491IPMG4 ADC support?
The MSP430F1491IPMG4 integrates a 12-bit ADC with eight dedicated analog input channels (A0–A7), mapped to P6.0 through P6.7. These inputs support both internal reference and external VeREF+/- configurations, and the autoscan feature allows automatic sequencing across all channels without CPU intervention.
Is the MSP430F1491IPMG4 pin-compatible with the MSP430F149IPM?
Yes, the MSP430F1491IPMG4 and MSP430F149IPM share identical LQFP-64 packaging, pinout, and electrical specifications. The "1" suffix denotes the F14x1 family revision (e.g., simplified P2.6 function), but TI's device comparison table confirms full pin and functional compatibility for all I/O, power, and JTAG signals.
What low-power modes are available on the MSP430F1491IPMG4?
The MSP430F1491IPMG4 supports five power-saving modes: LPM0 through LPM4. LPM3 draws 1.6 µA and retains RAM and register contents, while LPM4 consumes just 0.1 µA with only RAM retention - enabling rapid wake-up (<6 µs) for event-driven sensing in battery-critical applications.
MSP430F1491IPMG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 64-LQFP
- Series:
- MSP430x1xx
- Packaging:
- Tray
- Product Status:
- Discontinued at Digi-Key
- Programmable:
- Verified
- Core Processor:
- MSP430 CPU16
- Core Size:
- 16-Bit
- Speed:
- 8MHz
- Connectivity:
- SPI, UART/USART
- Peripherals:
- POR, PWM, WDT
- Number of I/O:
- 48
- Program Memory Size:
- 60KB (60K x 8 + 256B)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 2K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- Slope A/D
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F1491IPMG4 FAQ
1.How can I place an order for MSP430F1491IPMG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F1491IPMG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MSP430F1491IPMG4 reliable?
The price and inventory of MSP430F1491IPMG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F1491IPMG4 is usually 5 days.
3.What payment methods are accepted for MSP430F1491IPMG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F1491IPMG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F1491IPMG4?
MSP430F1491IPMG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F1491IPMG4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MSP430F1491IPMG4?
For technical support, including MSP430F1491IPMG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F1491IPMG4 requirements.
6.How does Aetrix verify that MSP430F1491IPMG4 is sourced from the original manufacturer or authorized distributors?
All MSP430F1491IPMG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MSP430F1491IPMG4 meets industry standards.
7.What is the process for return or replacement of MSP430F1491IPMG4?
All MSP430F1491IPMG4 units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F1491IPMG4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MSP430F1491IPMG4 part is unused and in its original packaging.
Return procedure for MSP430F1491IPMG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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