MSP430F6779AIPZ - 25MHz Polyphase Metering SoC, 512KB Flash | TI
MPN: MSP430F6779AIPZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $11.79 | $11.79 |
| 10 | $10.61 | $106.10 |
| 100 | $9.43 | $943.00 |
| 500 | $8.55 | $4,275.00 |
| 1,000 | $7.75 | $7,750.00 |
MSP430F6779AIPZ Overview
The MSP430 family is a line of ultra-low-power 16-bit mixed-signal microcontrollers from Texas Instruments built around the MSP430X CPUXV2 core. A metering SoC is a specialized microcontroller that integrates precision analog front-ends (sigma-delta ADCs), energy-measurement firmware support, and communication peripherals into one device - placing analog acquisition, computational logic, and display driving on the same silicon to reduce bill-of-materials cost and to provide calibrated metrology accuracy for billing-grade electricity meters.
Key specifications include seven independent 24-bit SD24 sigma-delta ADCs (each with its own input multiplexer and reference buffer), 512KB in-system programmable Flash, 32KB SRAM, a built-in LCD driver capable of up to 320 segments, a hardware AES-128/256 accelerator, a real-time clock (RTC) with calendar mode, and a maximum CPU clock of 25 MHz. The device operates from 1.8 V to 3.6 V, supports five low-power modes drawing as little as 0.1 uA in RTC-only retention, and exposes multiple serial interfaces (UART, SPI, I2C) for communication with metrology front-ends or smart-metering PLC modems.
Architecturally, the MSP430F6779AIPZ combines the MSP430X CPUXV2 core with a 32-bit hardware multiplier, a three-channel DMA controller, and the seven SD24 ADCs clocked by a dedicated auxiliary clock domain. The integrated LCD controller supports 4-mux/8-mux displays with charge-pump generation, eliminating the need for an external display driver and reducing overall BOM cost in single-phase and polyphase meter designs.
Typical applications include three-phase electricity meters, single-phase smart meters, grid-monitoring equipment, solar inverter monitoring, industrial energy sub-meters, building-automation power meters, and any IEC 62053-22 / IEC 62053-23 class-0.2S or class-0.5S metrology design that requires multiple current and voltage channels with accurate active and reactive energy measurement.
Designers should plan for a stable low-noise analog supply (AVCC/AVSS) and a separate digital supply (DVCC/DVSS) with ferrite-isolation between them, since the sigma-delta ADCs are highly sensitive to digital switching noise. Use TI's MSP430 Energia Meter Library and MSP-IQMATHLIB DSP library to accelerate the development of class-0.2S calibration routines.
This page synthesizes distributor pricing, drop-in alternatives within the MSP430F67xxA family, and practical hardware design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for MSP430F6779AIPZ — 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 MSP430F6779AIPZ (same form factor and footprint) — differing in Operating Temperature, Package, Program Memory (Flash), Sigma-Delta ADCs.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MSP430F6779AIPZR
✅ Drop-In📋 Reference alternative (not in catalog)
MSP430F67791AIPZ
✅ Drop-In📋 Reference alternative (not in catalog)
MSP430F6777AIPZ
✅ Drop-In📋 Reference alternative (not in catalog)
MSP430F6775AIPZ
✅ Drop-In📋 Reference alternative (not in catalog)
MSP430F6778AIPZ
✅ Drop-In📋 Reference alternative (not in catalog)
MSP430F6736AIPZ
✅ Drop-In✓ In Stock
$5.63 / Unit
View Datasheet →MSP430F6779AIPZ Maximum Ratings & Electrical Characteristics
| Core Architecture | MSP430X CPUXV2 (16-bit RISC) |
| Maximum CPU Clock | 25 MHz |
| Program Memory (Flash) | 512 KB |
| SRAM | 32 KB |
| Sigma-Delta ADCs | 7 x 24-bit SD24 |
| LCD Driver | Integrated, up to 320 segments |
| Hardware AES | AES-128/256 accelerator |
| Real-Time Clock (RTC) | Yes, with calendar mode |
| Supply Voltage (DVCC) | 1.8 V to 3.6 V |
| Operating Temperature | -40C to +85C (industrial) |
| Package | 100-pin LQFP (PZ), 14x14 mm |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| Communication Interfaces | UART, SPI, I2C |
| DMA Channels | 3 |
| Hardware Multiplier | 32-bit |
| RoHS Status | Compliant |
| Lead-Free Finish | Yes |
MSP430F6779AIPZ Pin Configuration
| Pin 1 | P6.0/CB0/A0 — General-purpose I/O / LCD segment / analog channel 0 |
| Pin 2 | P6.1/CB1/A1 — General-purpose I/O / LCD segment / analog channel 1 |
| Pin 3 | P6.2/CB2/A2 — General-purpose I/O / LCD segment / analog channel 2 |
| Pin 4 | P6.3/CB3/A3 — General-purpose I/O / LCD segment / analog channel 3 |
| Pin 5 | AVCC1 — Analog supply voltage 1 |
| Pin 6 | P7.0/CB4/A4 — General-purpose I/O / LCD segment / analog channel 4 |
| Pin 7 | P7.1/CB5/A5 — General-purpose I/O / LCD segment / analog channel 5 |
| Pin 8 | P7.2/CB6/A6 — General-purpose I/O / LCD segment / analog channel 6 |
| Pin 9 | P7.3/CB7/A7 — General-purpose I/O / LCD segment / analog channel 7 |
| Pin 10 | P8.0 — General-purpose I/O |
| Pin 11 | P8.1 — General-purpose I/O |
| Pin 12 | P8.2 — General-purpose I/O |
| Pin 13 | P8.3 — General-purpose I/O |
| Pin 14 | DVCC1 — Digital supply voltage 1 |
| Pin 15 | DVSS1 — Digital ground 1 |
| Pin 16 | P1.0/TA0CLK/ACLK — GPIO / Timer0 clock / ACLK output |
| Pin 17 | P1.1/TA0.0 — GPIO / Timer0 capture/compare 0 |
| Pin 18 | P1.2/TA0.1 — GPIO / Timer0 capture/compare 1 |
| Pin 19 | P1.3/TA0.2 — GPIO / Timer0 capture/compare 2 |
| Pin 20 | P1.4/TA0.3 — GPIO / Timer0 capture/compare 3 |
| Pin 21 | P1.5/TA0.4 — GPIO / Timer0 capture/compare 4 |
| Pin 22 | P1.6/TA1CLK — GPIO / Timer1 clock |
| Pin 23 | P1.7/TA1.0 — GPIO / Timer1 capture/compare 0 |
| Pin 24 | P2.0/RTCCLK — GPIO / RTC clock output |
| Pin 25 | P2.1 — General-purpose I/O |
| Pin 26 | P2.2 — General-purpose I/O |
| Pin 27 | P2.3 — General-purpose I/O |
| Pin 28 | P2.4 — General-purpose I/O |
| Pin 29 | P2.5 — General-purpose I/O |
| Pin 30 | P2.6 — General-purpose I/O |
| Pin 31 | P2.7 — General-purpose I/O |
| Pin 32 | P3.0/STE0 — GPIO / SPI0 slave transmit enable |
| Pin 33 | P3.1/SIMO0 — GPIO / SPI0 master out slave in |
| Pin 34 | P3.2/SOMI0 — GPIO / SPI0 master in slave out |
| Pin 35 | P3.3/UCLK0 — GPIO / SPI0 clock |
| Pin 36 | P3.4/UTXD0 — GPIO / UART0 transmit |
| Pin 37 | P3.5/URXD0 — GPIO / UART0 receive |
| Pin 38 | P4.0/TB0CLK — GPIO / TimerB0 clock |
| Pin 39 | P4.1/TB0.0 — GPIO / TimerB0 capture/compare 0 |
| Pin 40 | P4.2/TB0.1 — GPIO / TimerB0 capture/compare 1 |
| Pin 41 | P4.3/TB0.2 — GPIO / TimerB0 capture/compare 2 |
| Pin 42 | P4.4/TB0.3 — GPIO / TimerB0 capture/compare 3 |
| Pin 43 | P4.5/TB0.4 — GPIO / TimerB0 capture/compare 4 |
| Pin 44 | P4.6/TB0.5 — GPIO / TimerB0 capture/compare 5 |
| Pin 45 | P4.7/TB0.6 — GPIO / TimerB0 capture/compare 6 |
| Pin 46 | P5.0 — General-purpose I/O |
| Pin 47 | P5.1 — General-purpose I/O |
| Pin 48 | P5.2 — General-purpose I/O |
| Pin 49 | P5.3 — General-purpose I/O |
| Pin 50 | P5.4 — General-purpose I/O |
| Pin 51 | P5.5 — General-purpose I/O |
| Pin 52 | P5.6 — General-purpose I/O |
| Pin 53 | P5.7 — General-purpose I/O |
| Pin 54 | DVCC2 — Digital supply voltage 2 |
| Pin 55 | DVSS2 — Digital ground 2 |
| Pin 56 | P9.0 — General-purpose I/O |
| Pin 57 | P9.1 — General-purpose I/O |
| Pin 58 | P9.2 — General-purpose I/O |
| Pin 59 | P9.3 — General-purpose I/O |
| Pin 60 | P9.4 — General-purpose I/O |
| Pin 61 | P9.5 — General-purpose I/O |
| Pin 62 | P9.6 — General-purpose I/O |
| Pin 63 | P9.7 — General-purpose I/O |
| Pin 64 | P10.0 — General-purpose I/O |
| Pin 65 | P10.1 — General-purpose I/O |
| Pin 66 | P10.2 — General-purpose I/O |
| Pin 67 | P10.3 — General-purpose I/O |
| Pin 68 | P10.4 — General-purpose I/O |
| Pin 69 | P10.5 — General-purpose I/O |
| Pin 70 | P10.6 — General-purpose I/O |
| Pin 71 | P10.7 — General-purpose I/O |
| Pin 72 | LCDREF — LCD voltage reference |
| Pin 73 | R33/LCDCAP — LCD bias resistor / charge pump capacitor |
| Pin 74 | SYNCDAC — Synchronization DAC output |
| Pin 75 | P11.0 — General-purpose I/O |
| Pin 76 | P11.1 — General-purpose I/O |
| Pin 77 | P11.2 — General-purpose I/O |
| Pin 78 | P11.3 — General-purpose I/O |
| Pin 79 | P11.4 — General-purpose I/O |
| Pin 80 | P11.5 — General-purpose I/O |
| Pin 81 | P11.6 — General-purpose I/O |
| Pin 82 | P11.7 — General-purpose I/O |
| Pin 83 | TEST/SBWTCK — Test mode / Spy-Bi-Wire TCK |
| Pin 84 | RST/NMI/SBWTDIO — Reset / NMI / Spy-Bi-Wire TDIO |
| Pin 85 | P1.0/TA0CLK/ACLK — GPIO / Timer0 clock / ACLK (alt. func.) |
| Pin 86 | AVCC2 — Analog supply voltage 2 |
| Pin 87 | AVSS1 — Analog ground 1 |
| Pin 88 | AVSS2 — Analog ground 2 |
| Pin 89 | VREF+ — SD24 ADC positive voltage reference |
| Pin 90 | VREF-/VeREF- — SD24 ADC negative voltage reference |
| Pin 91 | P6.4/CB8 — General-purpose I/O / LCD segment |
| Pin 92 | P6.5/CB9 — General-purpose I/O / LCD segment |
| Pin 93 | P6.6/CB10 — General-purpose I/O / LCD segment |
| Pin 94 | P6.7/CB11 — General-purpose I/O / LCD segment |
| Pin 95 | P7.4/CB12 — General-purpose I/O / LCD segment |
| Pin 96 | P7.5/CB13 — General-purpose I/O / LCD segment |
| Pin 97 | P7.6/CB14 — General-purpose I/O / LCD segment |
| Pin 98 | P7.7/CB15 — General-purpose I/O / LCD segment |
| Pin 99 | P8.4 — General-purpose I/O |
| Pin 100 | P8.5 — General-purpose I/O |
Typical Applications
MSP430F6779AIPZ is suitable for 7 applications: Three-Phase Electricity Meter, Single-Phase Smart Meter with Communication, Solar Inverter Power Monitor, Industrial Energy Sub-Meter, Building Automation Power Meter, Grid Monitoring / Power Quality Analyzer, EV Charging Station Energy Meter.
Three-Phase Electricity Meter
The MSP430F6779AIPZ's seven 24-bit sigma-delta ADCs directly sample three phase voltages and three phase currents plus a neutral channel, while the 25 MHz MSP430X CPUXV2 core runs the metrology algorithm at line frequency with margin to spare for advanced features such as harmonic analysis up to the 40th order. The integrated hardware AES-128/256 accelerator secures DLMS/COSEM communication between the meter and the utility head-end system, eliminating an external crypto IC. The 512 KB Flash accommodates the full TI Energia Meter Library plus customer-specific calibration tables for class-0.2S IEC 62053-22 billing accuracy. The 100-LQFP package exposes enough pins for LCD, communication, and tamper-detect GPIO without an external I/O expander, making it ideal for cost-optimized three-phase 4-wire smart meter designs.
Recommended
Single-Phase Smart Meter with Communication
Even in single-phase form factors, the MSP430F6779AIPZ offers substantial headroom: the extra SD24 channels can monitor DC link, battery, or PV input, while the AES hardware secures wireless M-Bus, NB-IoT, or Wi-SUN communication modules. The integrated LCD driver (up to 320 segments) drives segmented displays showing consumption, tariffs, and time-of-use indicators without a secondary driver IC. Low-power modes (LPM3.5 RTC retention at microamp-level current) keep standby battery drain negligible, enabling >10-year lithium battery life for tamper backup. The 32 KB SRAM buffers incoming DLMS frames and event logs before committing to Flash.
Recommended
Solar Inverter Power Monitor
In PV inverter monitoring designs, the MSP430F6779AIPZ samples DC-side voltage and current alongside AC grid voltage and current using its seven SD24 channels. The 25 MHz core plus 32-bit hardware multiplier computes real power, reactive power, and THD with the IQMathLib DSP library at the PWM switching frequency without saturating CPU budget. The 512 KB Flash stores panel IV-curve lookup tables, anti-islanding detection algorithms, and power-quality event logs for grid-code compliance (IEEE 1547, VDE-AR-N 4105). The hardware AES protects remote firmware update channels for inverter firmware over the lifetime of the installation.
Recommended
Industrial Energy Sub-Meter
Industrial sub-metering requires multi-channel energy measurement for load distribution, machine-level monitoring, and energy-cost allocation. The MSP430F6779AIPZ supports up to seven independent current/voltage channels, allowing simultaneous measurement of three-phase mains plus a fourth auxiliary circuit such as DC bus or capacitor-bank current. The integrated RTC timestamps consumption logs for time-of-use billing, and the hardware AES secures data uploads to cloud-based energy management platforms. The -40C to +85C industrial temperature range and LQFP-100 package are proven in harsh factory-floor environments.
Recommended
Building Automation Power Meter
Building-automation energy meters integrate lighting, HVAC, and receptacle-circuit monitoring into BACnet or Modbus networks. The MSP430F6779AIPZ's seven SD24 channels support multi-circuit residential or commercial panelboards where multiple branch circuits share a single MCU. The integrated hardware AES protects BACnet/SC secure communication sessions, increasingly required by ASHRAE 135-2020. The LCD driver displays consumption locally for tenant-facing readouts, and the 32 KB SRAM buffers BACnet/IP packets before forwarding to the building automation system (BAS) controller.
Recommended
Grid Monitoring / Power Quality Analyzer
Permanent grid-monitoring installations sample voltage and current continuously at the feeder level to detect sag, swell, harmonic distortion, and transient events. The MSP430F6779AIPZ's seven 24-bit sigma-delta ADCs offer the dynamic range required for class-A power-quality measurement per IEC 61000-4-30, while the 25 MHz core captures waveform snapshots for harmonic FFT analysis up to the 63rd order. The hardware AES secures IEC 61850 GOOSE messaging in substation automation deployments. The 512 KB Flash stores power-quality event records (typically 4 KB per event) for several months of continuous monitoring.
Recommended
EV Charging Station Energy Meter
EV charging stations require billing-grade AC energy measurement on the grid side plus DC-side monitoring of the charger output. The MSP430F6779AIPZ samples AC mains three-phase voltage and current with the seven SD24 channels, computes per-charging-session kWh delivered, and timestamps transactions via the integrated RTC for OCPP back-office billing reconciliation. The hardware AES secures OCPP 1.6/2.0.1 communication over TLS, an increasingly mandatory requirement for public charging networks. The wide 1.8 V to 3.6 V supply and the ruggedized LQFP-100 footprint support harsh underhood automotive-adjacent environments when paired with proper conformal coating and TVS protection.
Recommended
Recommended Products Summary
Engineering reference data for MSP430F6779AIPZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MSP430F6779AIPZR | MSP430F67791AIPZ | MSP430F6777AIPZ | MSP430F6775AIPZ | MSP430F6778AIPZ | MSP430F6736AIPZ |
|---|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 100-LQFP (PZ) 14x14 mm | 100-LQFP (PZ) 14x14 mm - same | 100-LQFP (PZ) 14x14 mm - same | 100-LQFP (PZ) 14x14 mm - same | 100-LQFP (PZ) 14x14 mm - same | 100-LQFP (PZ) 14x14 mm - same | 100-LQFP (PZ) 14x14 mm - same |
| Flash Memory | 512 KB | 512 KB | 512 KB | 256 KB (-50%) | 128 KB (-75%) | 512 KB | 128 KB (-75%) |
| SRAM | 32 KB | 32 KB | 32 KB | 16 KB (-50%) | 8 KB (-75%) | 32 KB | 8 KB (-75%) |
| Sigma-Delta ADCs | 7 x 24-bit | 7 x 24-bit | 7 x 24-bit | 7 x 24-bit | 7 x 24-bit | 7 x 24-bit | 6 x 24-bit (-14%) |
| Maximum CPU Clock | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz |
| LCD Driver | Up to 320 segments | Up to 320 segments | Up to 320 segments | Up to 320 segments | Up to 320 segments | Up to 320 segments | Up to 256 segments |
| Hardware AES | Yes (AES-128/256) | Yes (AES-128/256) | Yes (AES-128/256, enhanced) | Yes (AES-128/256) | Yes (AES-128/256) | Yes (AES-128/256) | Yes (AES-128/256) |
| RTC + Calendar | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Supply Voltage Range | 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 | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
Key Differentiators
- Maximum Flash density in MSP430F67xxA family (vs MSP430F6777AIPZ)
- Higher SD24 ADC channel count than base-tier parts (vs MSP430F6736AIPZ)
- Original silicon revision with widest documentation support (vs MSP430F6779AIPZR)
Design Notes
Use separate analog (AVCC) and digital (DVCC) supply domains with a ferrite bead (e.g., BLM18PG221SN1) and decoupling capacitors (10 uF bulk + 100 nF + 10 nF at each AVCC pin). Estimated: with AVCC = DVCC = 3.3 V and CPU active at 25 MHz, current draw per pin pair should remain under 25 mA combined per the MSP430F67xxA datasheet. Route the AVCC star-point directly from the LDO output, not from DVCC, to prevent digital switching noise coupling into the SD24 ADC reference and degrading metrology accuracy below class-0.5S.
Place the SD24 reference decoupling capacitors (1 uF X7R + 100 nF) within 2 mm of the VREF+ pin and keep the VREF+/VREF- traces short and symmetric. Estimated: ground-plane impedance below 0.5 ohm at 50 Hz line frequency is required to maintain 0.1% ADC accuracy. Avoid routing any digital switching signals (SPI, UART) directly underneath the analog input traces or near the VREF pins to prevent injected common-mode noise.
Allocate a single continuous ground plane beneath the LQFP-100 footprint; do not split the ground plane between analog and digital sections as is sometimes recommended for high-speed designs - the SD24 ADC linearity on MSP430F67xxA benefits from a single uninterrupted ground return. Estimated: keep the analog input traces routed on the top layer with the ground plane directly underneath (no signal traces crossing) to minimize ground-loop area. The RST/NMI pin requires an external 47 kohm pull-up resistor and a 1 nF capacitor for proper Spy-Bi-Wire programming.
Do not assume the default DCO clock frequency is accurate for metering - calibrate the DCO against the 32.768 kHz crystal at production using the TI Energia Meter Library calibration routine, otherwise the SD24 sample timing will drift and energy measurement accuracy will suffer. Also note that pin 84 (RST/NMI) is shared with the Spy-Bi-Wire JTAG data line; do not pull this pin low at power-up or programming will be impossible. Verify that the LCDCAP pin (73) is decoupled with 1 uF to ground for stable charge-pump operation.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified; for automotive metering applications consult TI for the AEC-Q100 qualified MSP430F67xxx automotive variants. Halogen-free status not stated explicitly in provided data; mark as unknown per data authenticity rules.
