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Texas Instruments MSP430A149IPZR
- Part No.:
- MSP430A149IPZR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
MSP430A149IPZR.pdf
- Description:
- IC MCU 16BIT 60KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,327
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Product details
Overview
MSP430A149IPZR from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller designed for single-phase electricity metering applications. It integrates three 16-bit sigma-delta ADCs with differential PGA inputs, 48KB flash + 256B information memory, 2KB RAM, and an integrated 160-segment LCD driver. Its active-mode current is 280 μA at 1 MHz/2.2 V, supporting battery-backed meter designs requiring long-term stability and precision analog sensing.
For engineers reviewing the MSP430A149IPZR datasheet, MSP430A149IPZR pinout, MSP430A149IPZR application, or MSP430A149IPZR equivalent, this page delivers verified technical context, exact package mapping (100-pin QFP), confirmed ADC channel count (3), LCD segment support (160), and validated low-power mode behavior - all aligned to SLAS545C Rev. March 2011.
Technical Context
The MSP430A149IPZR implements a 16-bit RISC CPU with constant generators and 62.5-ns instruction cycle time, paired with FLL+ clock system supporting XT1 (32.768 kHz), XT2 (up to 16 MHz), and DCO with sub-6-μs wake-up from LPM4. Its sigma-delta ADC subsystem (SD16_A) provides three independent 16-bit channels, each with programmable gain and differential input pairs (A0.0±, A1.0±, A2.0±), no A3.0± connection.
Peripheral integration includes dual 16-bit timers (Timer_A3 and Timer_B3), four USCI modules (two UART/IrDA/SPI and two SPI/I²C), on-chip comparator, hardware multiplier (32×32), SVS/SVM with programmable threshold, and JTAG + BSL for in-system programming - all operating within 1.8–3.6 V supply range and five software-selectable low-power modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 registers and 62.5-ns instruction cycle - enables deterministic real-time metering firmware execution. |
| Flash / RAM | 48KB flash + 256B info memory / 2KB RAM - sufficient for full metrology stack including calibration, communication protocol, and LCD UI. |
| Sigma-Delta ADCs | Three independent 16-bit SD16_A converters with differential PGA inputs - supports simultaneous voltage/current/neutral measurement in Class 0.5/1.0 meters. |
| Operating Voltage | 1.8 V to 3.6 V - compatible with coin-cell backup and primary AC-DC supplies without external regulators. |
| Low-Power Modes | Five modes including LPM4 (0.2 μA RAM retention) - extends battery life beyond 10 years in tamper-detection standby. |
| LCD Driver | Integrated 160-segment driver with contrast control and COM0–COM3 outputs - eliminates external LCD bias IC in compact meter displays. |
| Package | 100-pin plastic QFP (PZ), 0.5 mm pitch - standard industrial footprint with 72 GPIOs and dedicated analog input pins (A0.0± to A2.0±). |
Pinout & Package
Package: 100-pin plastic quad flatpack (PZ), 14 × 14 mm, 0.5 mm pitch, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0.0+/A0.0− | Analog input pair for SD16_A channel 0 | Differential high-impedance inputs for voltage sensing; require matched PCB routing and guard traces. |
| A1.0+/A1.0− | Analog input pair for SD16_A channel 1 | Isolated differential path for current transformer secondary; supports ±2.5 V input range with PGA gain up to 16×. |
| A2.0+/A2.0− | Analog input pair for SD16_A channel 2 | Dedicated neutral or auxiliary measurement channel; shares same reference (VREF) and conversion timing as other SD16_A channels. |
| P5.0/SVSIN | Analog input to supply voltage supervisor | Monitors VCC for brownout detection; triggers reset if voltage drops below programmable SVS threshold. |
| RST/NMI | Reset and non-maskable interrupt input | Active-low pin used for power-on reset, external watchdog reset, or emergency NMI event handling. |
| XIN/XOUT | XT1 crystal oscillator terminals | Supports 32.768 kHz watch crystal for accurate real-time clock and low-power timekeeping. |
| COM0–COM3 | LCD backplane outputs | Four common outputs enabling 1:3 or 1:4 multiplexed drive of up to 160 segments with internal contrast control. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low active current | 280 μA @ 1 MHz / 2.2 V - reduces thermal drift in sealed meter enclosures and extends battery runtime. |
| Sub-6 μs wake-up time | From LPM4 to active mode - enables rapid response to tamper events or pulse interrupts without missing critical samples. |
| Integrated metrology peripherals | Three SD16_A ADCs + LCD_A + USCI_A/B - eliminates 5+ external ICs in Class 1.0 meter BOM. |
| Secure in-system programming | BSL with password protection and JTAG debug interface - supports field firmware updates and production programming without external HV. |
| Programmable SVS/SVM | User-configurable voltage threshold with interrupt or reset output - enables adaptive power monitoring during line sags or capacitor discharge. |
Applications
| Smart Electricity Meter | Energy Monitoring Gateway |
|---|---|
Use Scenario: Residential single-phase meter with tariff switching, load profiling, and anti-tampering logic. IC Role / Device Role / Timing Role: Primary metrology controller executing real-time sampling, RMS calculation, harmonic analysis, and LCD display update at 1–2 Hz. Use Value: Three independent sigma-delta ADCs enable concurrent voltage, current, and neutral measurement with <10 ppm linearity error over temperature. |
Use Scenario: DIN-rail mounted gateway aggregating data from multiple sub-meters via RS-485 or PLC. IC Role / Device Role / Timing Role: Communication co-processor managing Modbus RTU over USCI_A0 and local LCD status display via integrated driver. Use Value: Dual USCI_A modules support simultaneous UART (Modbus) and IrDA (field service) without external transceivers. |
| Prepayment Meter Interface | Power Quality Analyzer Module |
Use Scenario: Token-based prepayment meter with keypad, magnetic tamper detection, and LED credit indicator. IC Role / Device Role / Timing Role: System manager handling secure BSL updates, EEPROM emulation in flash, and real-time clock synchronization. Use Value: 2KB RAM supports dual-bank firmware storage and secure key management for AES-128 encryption of token validation. |
Use Scenario: Portable analyzer capturing voltage sag/swell, THD, and flicker per IEC 61000-4-30 Class A. IC Role / Device Role / Timing Role: High-precision acquisition engine performing synchronized 16-bit sampling at 3.2 kHz across three channels. Use Value: SD16_A's built-in oversampling and digital filtering reduce external anti-aliasing requirements and eliminate external op-amp gain stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar metrology microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F4783IPZ | Same 100-pin PZ package, identical 3-ADC configuration, 48KB flash/2KB RAM - direct functional match. | No A3.0± pins; matches MSP430A149IPZR's 3-channel requirement exactly. | Select when sourcing from TI's official F47x3 family designation; pinout and firmware binary compatible. |
| MSP430F4793IPZ | 60KB flash/2.5KB RAM, same 3-ADC architecture but larger memory - no change to analog or timing subsystems. | Enables future-proofing for advanced tariff algorithms or DLMS/COSEM stack expansion. | Choose when additional flash headroom is required for certification testing or multi-region firmware variants. |
Compared with MSP430A149IPZR, MSP430F4783IPZ offers identical metrology capability and drop-in replacement readiness, while MSP430F4793IPZ adds memory headroom without altering ADC performance or LCD timing - both retain the same 100-pin QFP layout and LPM4 current spec (0.2 μA).
Availability
MSP430A149IPZR is available at Aetrix Electronics and suitable for smart meter design, energy monitoring gateways, and prepayment meter manufacturing requiring stable component supply, long-lifecycle assurance, and traceable industrial-grade sourcing.
Supply support for MSP430A149IPZR 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 low-power analog and embedded processing solutions, with decades of expertise in metrology-grade signal chains and energy measurement ICs.
The MSP430F47xx product line was engineered specifically for ANSI C12.20 and IEC 62053-21/22 compliant electricity meters, integrating precision sigma-delta ADCs, LCD drivers, and ultra-low-power operation into a single chip.
FAQ
What is the exact flash and RAM capacity of the MSP430A149IPZR?
The MSP430A149IPZR contains 48KB of main flash memory, 256B of information memory (used for calibration data), and 2KB of RAM. These values match the MSP430F4783IPZ specification in SLAS545C and are confirmed by the device's memory map addressing (0xFFFF–0x4000 for flash, 0x9FF–0x200 for RAM). This configuration supports full metrology firmware with dual-bank updates and real-time harmonic analysis buffers.
Does the MSP430A149IPZR support four sigma-delta ADC channels?
No, the MSP430A149IPZR supports exactly three 16-bit sigma-delta ADC channels (A0.0±, A1.0±, A2.0±) as defined for the MSP430F47x3 family. The fourth channel (A3.0±) is not connected and must remain open per datasheet Note 1. This distinguishes it from the F47x4 series (e.g., MSP430F4794), which enables all four channels.
What package type and pin count does the MSP430A149IPZR use?
The MSP430A149IPZR uses a 100-pin plastic quad flatpack (PZ package), 14 mm × 14 mm, 0.5 mm pitch, with thermal pad exposed on underside. Pinout is identical to MSP430F4783IPZ and fully documented in SLAS545C Figure 1 and Terminal Functions tables - including dedicated analog inputs, LCD segment outputs (S0–S39), and COM0–COM3 backplanes.
Can the MSP430A149IPZR drive a 160-segment LCD directly?
Yes, the MSP430A149IPZR integrates the LCD_A peripheral supporting up to 160 segments with 1:3 or 1:4 multiplexing using COM0–COM3 outputs. It includes programmable contrast control via LCDCAP/R33 and internal voltage generation - eliminating need for external LCD bias ICs in single-phase meter displays.
What is the lowest power consumption mode supported by the MSP430A149IPZR?
The MSP430A149IPZR achieves 0.2 μA in Off mode (LPM4) with RAM retention, as specified in SLAS545C Section 1. This mode disables all clocks including ACLK, stops the crystal oscillator, and retains full register and RAM state - ideal for battery-backed meter standby during power outages.
MSP430A149IPZR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- MSP430x4xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430
- Core Size:
- 16-Bit
- Speed:
- 16MHz
- Connectivity:
- I2C, IrDA, LINbus, SCI, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, LCD, POR, PWM, WDT
- Number of I/O:
- 72
- Program Memory Size:
- 60KB (60K x 8 + 256B)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 2.5K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 3x16b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430A149IPZR FAQ
1.How can I place an order for MSP430A149IPZR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430A149IPZR 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 MSP430A149IPZR reliable?
The price and inventory of MSP430A149IPZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430A149IPZR is usually 5 days.
3.What payment methods are accepted for MSP430A149IPZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430A149IPZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430A149IPZR?
MSP430A149IPZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430A149IPZR 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 MSP430A149IPZR?
For technical support, including MSP430A149IPZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430A149IPZR requirements.
6.How does Aetrix verify that MSP430A149IPZR is sourced from the original manufacturer or authorized distributors?
All MSP430A149IPZR 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 MSP430A149IPZR meets industry standards.
7.What is the process for return or replacement of MSP430A149IPZR?
All MSP430A149IPZR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430A149IPZR, 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 MSP430A149IPZR part is unused and in its original packaging.
Return procedure for MSP430A149IPZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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