MSP430F6734AIPNR - 16-bit 96KB Flash Metering SoC | Texas Instruments
MPN: MSP430F6734AIPNR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $11.4 | $11.40 |
| 10 | $10.26 | $102.60 |
| 100 | $9.12 | $912.00 |
| 500 | $7.96 | $3,980.00 |
| 1,000 | $6.84 | $6,840.00 |
MSP430F6734AIPNR Overview
Background: A metering SoC is a class of mixed-signal microcontroller optimized for accurate measurement of line-voltage and line-current waveforms in single- or poly-phase electricity meters. Within the broader power-management IC hierarchy, the metering SoC sits alongside analog front-ends (AFEs), metrology coprocessors, and standard MCUs, but uniquely combines the metering-specific sigma-delta data path, reference, and LCD segment drive into a single low-power die. This integration eliminates the need for a dedicated metrology AFE companion chip and reduces BOM count.
Key differentiating features include the three 24-bit sigma-delta ADCs with built-in programmable gain amplifiers, dedicated tamper-detection input pins for anti-tamper designs, hardware RTC with calendar function, integrated segmented LCD driver supporting up to 320 segments, and the MSP430 CPUXV2 core offering multiple low-power modes (LPM3, LPM4) with sub-microamp standby current. The 96 KB Flash supports full application firmware plus IEC 62053-22 calibration tables.
Technical depth: The three sigma-delta ADCs are paired with on-chip voltage reference and gain stages, enabling simultaneous sampling of phase voltage, phase current, and neutral current with effective number of bits (ENOB) suitable for Class 0.2 or Class 0.5 meters per IEC 62053. The 25 MHz CPUXV2 core provides ample headroom for FFT-based harmonic analysis up to the 63rd harmonic while remaining in active mode only during measurement windows.
Typical applications include single-phase residential electricity meters, smart energy monitoring sockets, energy-harvesting IoT sensors, prepayment meters, and battery-backed tamper-detecting metering nodes. The integrated LCD driver eliminates a separate driver chip and reduces cost in display-equipped designs. Compared with a discrete MCU + AFE solution, the SoC approach reduces PCB area by approximately 40% and BOM cost.
Design consideration: When laying out the PCB, keep the analog sigma-delta traces short and symmetric to avoid degrading effective resolution, place the 32.768 kHz crystal within 5 mm of the XIN/XOUT pins, and provide a solid ground plane under the device to minimize noise coupling into the metrology inputs.
This page synthesizes distributor pricing, drop-in alternative MPNs, and design guidance not consolidated in the manufacturer datasheet, supporting rapid component selection and second-sourcing decisions.
Drop-in alternatives for MSP430F6734AIPNR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MSP430F6734AIPNR (same form factor and footprint) — differing in LCD Driver.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MSP430F6735AIPNR
✅ Drop-In📋 Reference alternative (not in catalog)
MSP430F6736AIPNR
✅ Drop-In✓ In Stock
$6.18 / Unit
View Datasheet →MSP430F6733AIPNR
✅ Drop-In📋 Reference alternative (not in catalog)
MSP430F6734AIPN
✅ Drop-In📋 Reference alternative (not in catalog)
MSP430F6734AIPZ
✅ Drop-In📋 Reference alternative (not in catalog)
MSP430F6734AIPNR Maximum Ratings & Electrical Characteristics
| Core | MSP430 CPUXV2 (16-bit RISC) |
| Maximum Clock Frequency | 25 MHz |
| Program Memory (Flash) | 96 KB |
| RAM | 4 KB |
| ADC Type | 3 x 24-bit Sigma-Delta |
| LCD Driver | Integrated (up to 320 segments) |
| Real-Time Clock | Yes (with calendar) |
| Supply Voltage Range | 2.5 V / 3.3 V |
| Operating Temperature Range | -40C to +85C (Industrial) |
| Package | 80-LQFP (PN) 12x12 mm |
| Pin Count | 80 |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
| Lead Free | Yes |
| Terminal Form | Gull Wing |
| Tamper Detection Inputs | Yes |
MSP430F6734AIPNR 80-lqfp (pn) 12x12 mm Pin Configuration Guide
Pin configuration for MSP430F6734AIPNR (80-lqfp (pn) 12x12 mm package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for MSP430F6734AIPNR.
Refer to the datasheet for full pin configuration.
Typical Applications
MSP430F6734AIPNR is suitable for 6 applications: Single-Phase Electricity Meter, Smart Energy Monitoring Socket, Prepayment Energy Meter, Energy-Harvesting IoT Sensor, Battery-Backed Tamper-Detecting Metering Node, Industrial Power Quality Monitor.
Single-Phase Electricity Meter
The MSP430F6734AIPNR is engineered for Class 0.2 single-phase residential electricity meters per IEC 62053-22. Its three 24-bit sigma-delta ADCs simultaneously sample phase voltage, phase current, and neutral current with on-chip programmable gain amplifiers handling dynamic ranges from 10 mA to 100 A, eliminating an external metrology AFE. The integrated hardware RTC with calendar provides time-of-use tariff scheduling, and the integrated LCD driver up to 320 segments removes the need for an external LCD driver chip. The 96 KB Flash accommodates full metering firmware plus IEC 62053 calibration tables. Power consumption in LPM3 is sub-microamp, enabling backup-battery operation across power outages.
Recommended
Smart Energy Monitoring Socket
The MSP430F6734AIPNR fits smart plugs and wall-socket energy monitors that require accurate active and reactive power measurement in a compact form factor. Its three sigma-delta ADC channels handle live and neutral current sensing through current transformers or shunt resistors while the third channel measures line voltage for true-RMS computation. The 80-pin LQFP (PN) 12x12 mm package fits within the volume constraints of a wall socket, and the ultra-low-power LPM3/LPM4 modes allow the device to remain in standby between wireless transmissions, achieving years of life on a small lithium backup cell.
Recommended
Prepayment Energy Meter
For token-based prepayment meters, the MSP430F6734AIPNR combines metering accuracy with the hardware RTC and LCD driver needed to display remaining credit, tariff, and consumption history. The tamper-detection input pins support anti-fraud features such as cover removal detection and magnetic tamper detection per IEC 62055-31. The 96 KB Flash fits the prepayment firmware state machine plus cryptographic token validation, and the 4 KB RAM holds current consumption and credit counters without external memory. Compared to discrete MCU + AFE solutions, this SoC approach reduces PCB area by approximately 40%.
Recommended
Energy-Harvesting IoT Sensor
The MSP430F6734AIPNR's ultra-low-power architecture makes it suitable for battery- or energy-harvested wireless sensor nodes that perform periodic metrology-style measurements, such as industrial flow meters or solar irradiance loggers. The 25 MHz MSP430 CPUXV2 core executes FFT-based spectral analysis within millisecond measurement windows before returning to LPM3 standby, drawing sub-microamp quiescent current. The integrated RTC enables accurate timestamping without an external RTC chip. The industrial -40C to +85C temperature rating covers outdoor and industrial-deployed sensors.
Recommended
Battery-Backed Tamper-Detecting Metering Node
For metering endpoints requiring extended backup-battery operation across power outages and active tamper monitoring, the MSP430F6734AIPNR's LPM3 standby current of sub-microamp and dedicated tamper-detection input pins provide a robust platform. The tamper inputs detect magnetic interference, cover removal, and reverse-current conditions while the RTC maintains timestamped event logs in 4 KB RAM and Flash. The integrated LCD driver continues to display consumption and tamper-alert status during backup-battery operation. This combination is well suited to ANSI C12.20 and IEC 62051 deployments requiring anti-tamper compliance.
Recommended
Industrial Power Quality Monitor
Beyond energy billing, the MSP430F6734AIPNR is suitable for industrial power-quality monitors that need to log voltage sags, surges, and harmonic distortion. Its three sigma-delta ADCs simultaneously sample voltage and two current channels, while the 25 MHz core performs harmonic analysis up to the 63rd harmonic in real time. The 96 KB Flash stores measurement algorithms plus factory calibration, and the 4 KB RAM buffers sample windows before batch transmission. The integrated RTC tags each event with a timestamp, and the integrated LCD driver can display real-time voltage, current, and power-factor readings.
Recommended
Recommended Products Summary
Engineering reference data for MSP430F6734AIPNR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MSP430F6735AIPNR | MSP430F6736AIPNR | MSP430F6733AIPNR | MSP430F6734AIPN | MSP430F6734AIPZ |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 80-LQFP (PN) 12x12 | 80-LQFP (PN) 12x12 - same | 80-LQFP (PN) 12x12 - same | 80-LQFP (PN) 12x12 - same | 80-LQFP (PN) 12x12 - same | 80-LQFP (PN) 12x12 - same |
| Flash Memory | 96 KB | 128 KB (+33%) | 256 KB (+167%) | 64 KB (-33%) | 96 KB (identical) | 96 KB (identical) |
| RAM | 4 KB | 4 KB (identical) | 4 KB (identical) | 4 KB (identical) | 4 KB (identical) | 4 KB (identical) |
| Core Clock | 25 MHz | 25 MHz (identical) | 25 MHz (identical) | 25 MHz (identical) | 25 MHz (identical) | 25 MHz (identical) |
| Sigma-Delta ADCs | 3 x 24-bit | 3 x 24-bit (identical) | 3 x 24-bit (identical) | 3 x 24-bit (identical) | 3 x 24-bit (identical) | 3 x 24-bit (identical) |
| LCD Driver | Up to 320 segments | Up to 320 segments (identical) | Up to 320 segments (identical) | Up to 320 segments (identical) | Up to 320 segments (identical) | Up to 320 segments (identical) |
| Operating Temperature | -40C to +85C | -40C to +85C (identical) | -40C to +85C (identical) | -40C to +85C (identical) | -40C to +85C (identical) | -40C to +85C (identical) |
| Unit Price (qty 1000) | USD 6.84 | USD 7.50 (est., higher Flash) | USD 8.90 (est., higher Flash) | USD 6.10 (est., lower Flash) | USD 6.84 (identical) | USD 6.84 (identical) |
Key Differentiators
- Optimal Flash size for Class 0.2 firmware (vs MSP430F6733AIPNR)
- Integrated 24-bit sigma-delta ADCs (vs MSP430F6734AIPN (tray variant))
- Lowest cost within the F673xA family (vs MSP430F6735AIPNR)
Design Notes
Keep the analog sigma-delta ADC input traces short, symmetric, and surrounded by a solid analog ground plane to avoid degrading effective resolution. The 32.768 kHz crystal must be placed within 5 mm of the XIN/XOUT pins with short traces and a guard ring connected to analog ground to minimize coupling from switching noise. A four-layer PCB with a dedicated ground plane is strongly recommended for IEC 62053-22 Class 0.2 metering designs.
Use a low-dropout regulator such as the TI TPS7A4533 or TPS3823-33 to provide a clean 3.3 V analog supply for the VCC and AVCC pins, with at least 1 uF of low-ESR ceramic decoupling on each supply pin placed within 3 mm of the pin. The integrated sigma-delta ADC reference is sensitive to supply ripple, and inadequate decoupling is a leading cause of metrology accuracy degradation.
Do not omit the reset capacitor on the RST pin - TI recommends 100 nF to VSS for proper power-on reset behavior. Do not exceed the 3.6 V absolute maximum on any digital I/O pin, even during transient spikes. When migrating from MSP430F5xx firmware, verify that the LCD segment mapping matches the F6734A pinout - the segment assignments differ from the F5xx family even though the LCD API looks similar.
Estimated: at continuous 25 MHz active mode with all peripherals enabled, the 80-pin LQFP (PN) package dissipates approximately 60 mW. With a typical theta_JA of 50 C/W for a 4-layer JEDEC test board, junction temperature rise above ambient is approximately 3 C. For sealed meter enclosures with no airflow, derate by 30% or add thermal vias under the exposed pad if the PCB allows.
Compliance Information
RoHS compliant per TI product page. Industrial -40C to +85C temperature grade only - not AEC-Q100 automotive qualified. For automotive metering applications, contact TI for AEC-Q100 qualified equivalents.
