My Inquiry
My Account
Texas Instruments MSP430F6721IPN
- Part No.:
- MSP430F6721IPN
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 80-LQFP
- Datasheet:
-
MSP430F6721IPN.pdf
- Description:
- IC MCU 16BIT 32KB FLASH 80LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:236
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MSP430F6721IPN from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller designed for single-phase electronic watt-hour metering. It integrates two 24-bit sigma-delta ADCs, a 10-bit 200-ksps ADC, LCD driver (up to 320 segments), RTC with crystal offset calibration, and three eUSCI_A modules supporting UART/IrDA/SPI - all in an 80-pin LQFP package operating from 1.8 V to 3.6 V.
For engineers reviewing the MSP430F6721IPN datasheet, MSP430F6721IPN pinout, MSP430F6721IPN application, or MSP430F6721IPN equivalent, key selection criteria include its dual SD24_B ADC channel count, 32 KB Flash/2 KB RAM memory configuration, 52 GPIO count, and support for tamper-resistant metering architectures requiring precise energy measurement and low-power RTC operation.
Technical Context
The MSP430F6721IPN implements a 16-bit RISC CPU with extended memory addressing and constant generators for high code efficiency. Its unified clock system includes FLL stabilization, VLO and REFO internal sources, and 32-kHz XT1 crystal support - enabling sub-µA standby modes (LPM3: 2.5 µA at 3.0 V) and 3 µs wakeup latency.
Peripherals are tightly integrated for metering: dual SD24_B ADCs accept differential PGA inputs for current/voltage sensing; ADC10_A provides auxiliary sampling (6 external + 2 internal channels); and the LCD_C module supports 8-mux contrast-controlled display driving without external bias components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 25-MHz max system clock and extended memory addressing |
| Flash / RAM | 32 KB Flash program memory and 2 KB RAM for firmware storage and real-time data buffering |
| ADC Resources | Two 24-bit sigma-delta ADCs (SD24_B) + one 10-bit 200-ksps ADC (ADC10_A) with internal temperature sensor |
| Low-Power Modes | LPM3 (RTC active): 2.5 µA at 3.0 V; LPM4 (full RAM retention): 1.6 µA at 3.0 V; LPM4.5: 0.78 µA |
| Package & I/O | 80-pin LQFP (12 mm × 12 mm); 52 general-purpose I/O pins with mappable secondary functions |
| Communication | Three eUSCI_A modules (UART/IrDA/SPI) + one eUSCI_B (I²C/SPI); JTAG/SBW debug interface |
| LCD Support | Integrated LCD_C controller with 8-mux capability driving up to 320 segments and programmable contrast |
Pinout & Package
Package: 80-pin LQFP (PN), 12 mm × 12 mm body size, standard JEDEC footprint with exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–4, 6, 7, 11–14, 16, 17, 24–26, 29–32, 34–37, 39–44, 46–48, 50–52, 54–56, 58–60, 62–64, 66–68, 70–72, 74–76, 78–80 | GPIO / Secondary Function Multiplexed Pins | Support digital I/O, timer capture/compare, UART/I²C/SPI signals, SD24_B analog inputs, and LCD segment/com drivers |
| 5, 8–10, 15, 18–23, 27, 28, 33, 38, 45, 49, 53, 57, 59, 61, 65, 69, 73, 77 | Power / Reference / Clock / Debug | DVCC/DVSS/AVCC/AVSS supply rails; VCORE core regulator input; XIN/XOUT 32-kHz crystal; RST/NMI/SBWTDIO debug reset; TEST/SBWTCK JTAG clock |
| 11, 12, 13, 14, 24, 25, 27, 28, 36, 37, 38, 39, 43, 44, 45, 46, 47, 48 | Analog Input / Reference / Calibration | VeREF+/VeREF−, A0–A5, SD0P0/SD0N0, SD1P0/SD1N0, LCDREF, AUXVCC1–3 for precision metrology reference and auxiliary subsystem biasing |
Key Features
| Feature | Design Value |
|---|---|
| Password-protected RTC with crystal offset calibration | Enables accurate timekeeping over temperature and aging without external compensation circuitry |
| Dual 24-bit SD24_B sigma-delta ADCs | Provides simultaneous high-resolution current and voltage sampling for Class 0.2 metering accuracy |
| Integrated LCD_C controller (8-mux) | Drives up to 320 segments directly with on-chip charge pump and contrast control - eliminates external bias IC |
| Fully integrated LDO with programmable core voltage | Allows dynamic core voltage scaling to optimize active-mode power vs. performance trade-off |
| Three eUSCI_A modules with IrDA encoder/decoder | Supports optical port communication per IEC 62056-21 standards without external transceivers |
Applications
| 2-Wire Single-Phase Metering | 3-Wire Single-Phase Metering |
|---|---|
Use Scenario: Residential electricity meters measuring active energy consumption using shunt-based current sensing and resistive voltage divider. IC Role / Device Role / Timing Role: Primary metrology MCU performing real-time energy calculation, pulse output generation, and LCD display update. Use Value: Dual SD24_B ADCs enable simultaneous sampling of voltage and current channels with 24-bit resolution, meeting IEC 62053-21 Class 0.2 accuracy requirements. | Use Scenario: Commercial single-phase meters with neutral connection, requiring separate phase and neutral current monitoring. IC Role / Device Role / Timing Role: Central processing unit executing tariff switching, demand calculation, and secure data logging with RTC timestamping. Use Value: Password-protected RTC with temperature compensation ensures accurate billing interval tracking across -40°C to +85°C ambient range. |
| Tamper-Resistant Meters | Smart Grid Endpoint Node |
Use Scenario: Meters deployed in unsecured environments where magnetic, thermal, or voltage injection tampering must be detected and logged. IC Role / Device Role / Timing Role: Tamper detection engine monitoring auxiliary supplies (AUXVCC1–3), supply supervisors, and GPIO-based sensor inputs. Use Value: Dedicated auxiliary supply subsystem with independent voltage rails enables reliable tamper detection even during main supply disruption. | Use Scenario: Edge node collecting metering data and transmitting via PLC or RF mesh to concentrator in AMI infrastructure. IC Role / Device Role / Timing Role: Communication gateway managing serial protocols (UART/IrDA) and secure firmware updates over eUSCI interfaces. Use Value: Three eUSCI_A modules allow concurrent optical port, PLC modem, and debug interface operation without resource contention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power metrology microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F6723IPN | 64 KB Flash / 4 KB RAM; identical peripheral set and pinout | Supports larger firmware for advanced tariff logic or DLMS/COSEM protocol stack | Select when firmware complexity exceeds 32 KB or additional RAM is required for data buffering |
| MSP430F6721IPZ | Same core/peripherals but in 100-pin LQFP (72 I/O, 3 SD24_B ADCs) | Enables higher I/O count for multi-tariff displays, relay control, or additional sensor interfaces | Select when >52 GPIO or third SD24_B channel is needed for expanded metrology or HAN connectivity |
Compared with MSP430F6723IPN and MSP430F6721IPZ, the MSP430F6721IPN offers optimal balance of metrology precision, low-power operation, and cost-sensitive 80-pin packaging - making it ideal for entry-level single-phase meters where Flash/RAM headroom and I/O count are constrained.
Availability
MSP430F6721IPN is available at Aetrix Electronics and suitable for 2-wire metering, 3-wire metering, and tamper-resistant electricity meter designs requiring stable component supply and long-term industrial lifecycle support.
Supply support for MSP430F6721IPN 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 company delivering analog and embedded processing solutions for industrial, automotive, and consumer applications.
The MSP430F672x product line is engineered specifically for single-phase energy metering, integrating metrology-grade ADCs, RTC, LCD driver, and ultra-low-power operation to meet IEC 62053 and ANSI C12 standards.
FAQ
What is the maximum system clock frequency supported by the MSP430F6721IPN?
The MSP430F6721IPN supports a maximum system clock frequency of 25 MHz, achieved via its digitally controlled oscillator (DCO) with FLL stabilization. This allows high-speed execution of metrology algorithms while maintaining compatibility with the device's ultra-low-power architecture and timing-critical peripherals like the SD24_B ADCs and RTC.
Does the MSP430F6721IPN include hardware for energy calculation?
No, the MSP430F6721IPN does not include dedicated hardware energy calculation engines. It relies on its 16-bit CPU and 32-bit hardware multiplier (MPY32) to execute firmware-based active/reactive energy computations using samples from its SD24_B and ADC10_A modules - a design choice enabling flexible algorithm updates and compliance with evolving metering standards.
How many SD24_B ADC channels does the MSP430F6721IPN integrate?
The MSP430F6721IPN integrates two independent 24-bit sigma-delta ADC modules (SD24_B), each supporting differential PGA inputs. This configuration enables simultaneous high-precision sampling of voltage and current signals in single-phase metering applications, satisfying IEC 62053-21 Class 0.2 accuracy requirements without external signal conditioning.
Is the MSP430F6721IPN pin-compatible with other devices in the MSP430F672x family?
Yes, the MSP430F6721IPN is pin-compatible with all other 80-pin LQFP (PN package) variants in the MSP430F672x family, including MSP430F6720IPN through MSP430F6726IPN. Pin mappings, power domains, and peripheral signal assignments are identical - allowing shared PCB layouts and simplified variant management in metering product families.
What RTC features are implemented in the MSP430F6721IPN?
The MSP430F6721IPN implements a password-protected RTC_C module with crystal offset calibration and temperature compensation. It operates from a 32-kHz external crystal (XT1) in LPM3.5 mode at 1.24 µA, supports alarm interrupts, and maintains timekeeping accuracy across industrial temperature ranges without external calibration components.
MSP430F6721IPN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 80-LQFP
- Series:
- MSP430F6xx
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPUXV2
- Core Size:
- 16-Bit
- Speed:
- 25MHz
- Connectivity:
- I2C, IrDA, LINbus, SCI, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT
- Number of I/O:
- 52
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 2K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 5x10b, 2x24b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F6721IPN FAQ
1.How can I place an order for MSP430F6721IPN through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F6721IPN 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 MSP430F6721IPN reliable?
The price and inventory of MSP430F6721IPN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F6721IPN is usually 5 days.
3.What payment methods are accepted for MSP430F6721IPN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F6721IPN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F6721IPN?
MSP430F6721IPN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F6721IPN 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 MSP430F6721IPN?
For technical support, including MSP430F6721IPN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F6721IPN requirements.
6.How does Aetrix verify that MSP430F6721IPN is sourced from the original manufacturer or authorized distributors?
All MSP430F6721IPN 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 MSP430F6721IPN meets industry standards.
7.What is the process for return or replacement of MSP430F6721IPN?
All MSP430F6721IPN units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F6721IPN, 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 MSP430F6721IPN part is unused and in its original packaging.
Return procedure for MSP430F6721IPN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MSP430F6721IPN Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
