Texas Instruments MSP430F6736AIPZR

Overview

MSP430F6736AIPZR from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller designed for precision energy metering applications. It integrates three 24-bit sigma-delta ADCs, a 10-bit 200-ksps ADC, LCD driver (up to 320 segments), real-time clock with crystal calibration, and four enhanced USCI modules - all in a 100-pin LQFP package operating from 1.8 V to 3.6 V.

For engineers reviewing the MSP430F6736AIPZR datasheet, MSP430F6736AIPZR pinout, MSP430F6736AIPZR application, or MSP430F6736AIPZR equivalent, key selection criteria include its triple SD24_B ADC architecture, auxiliary supply support for RTC backup, low-power LPM3.5 mode (1.24 µA), and integrated metering peripherals enabling single-phase watt-hour meter compliance without external signal conditioning.

Technical Context

The MSP430F6736AIPZR implements a unified clock system with FLL stabilization, VLO/REFO internal sources, and 32-kHz XT1 crystal support for RTC accuracy. Its power management includes an integrated LDO with programmable core voltage, dual auxiliary supplies (AUXVCC1–3), and dedicated AVCC/DVCC domains isolating analog and digital subsystems.

Peripherals are tightly coupled for metering: SD24_B converters accept differential PGA inputs directly from current/voltage sensors; ADC10_A provides fast sampling of temperature and auxiliary signals; eUSCI_A0/A1/A2 support UART (with auto-baud detection), IrDA, and SPI; eUSCI_B0 handles I²C or SPI for sensor/communication expansion.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PZ), 14 mm × 14 mm, thermally enhanced with exposed pad (not electrically connected). Pinout validated per TI SLASE46A Rev. October 2018, Figure 4-1 and Table 4-3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar metering microcontroller applications.

Compared with MSP430F6735AIPZR and MSP430F6726AIPZR, the MSP430F6736AIPZR provides full metrology capability - triple SD24_B for simultaneous voltage/current/neutral sensing, integrated LCD_C for local UI, and 8 KB RAM for extended data logging - making it the highest-integration option in the F673x family for Class 0.2 single-phase meters.

Availability

MSP430F6736AIPZR is available at Aetrix Electronics and suitable for single-phase watt-hour meters, smart grid sensor nodes, and utility asset monitors requiring stable component supply, long-term lifecycle support, and metrology-grade accuracy.

Supply support for MSP430F6736AIPZR 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 delivering analog, embedded processing, and connectivity solutions with emphasis on power efficiency and system integration.

The MSP430F6736AIPZR belongs to TI's ultra-low-power MSP430F67xxA metering MCU product line, engineered specifically for ANSI C12.20 and IEC 62053-compliant electricity meters with integrated analog front-end, RTC, and display drivers.

FAQ

What is the maximum sampling rate supported by the SD24_B ADCs in the MSP430F6736AIPZR?

The MSP430F6736AIPZR's three SD24_B ADCs support up to 256 kSPS aggregate throughput across all channels using oversampling and decimation. Each SD24_B converter operates at up to 1.2 MSPS internal conversion rate, enabling 24-bit resolution at 1 kSPS or 16-bit at 10 kSPS - sufficient for IEC 62053-22 Class 0.2 metering with 50/60 Hz fundamental and harmonic analysis. The MSP430F6736AIPZR datasheet specifies this performance under AVCC = 3.0 V and fMOD = 1.2 MHz.

Does the MSP430F6736AIPZR support hardware-based AES encryption for secure firmware updates?

No, the MSP430F6736AIPZR does not include a hardware AES engine. Security relies on software-implemented cryptographic libraries and the device's password-protected JTAG/SBW interface and RTC. For secure boot and firmware authentication, external secure elements or software-based SHA-256/ECDSA are required. The MSP430F6736AIPZR provides memory protection units and BSL lock bits to prevent unauthorized code readout, but encryption acceleration is not integrated.

Can the MSP430F6736AIPZR operate from a single 3.3-V supply without external LDOs?

Yes, the MSP430F6736AIPZR integrates a fully programmable LDO that regulates VCORE from DVCC (1.8–3.6 V), eliminating need for external core regulators. AVCC and AUXVCC supplies must still be externally filtered and decoupled, but DVCC can be directly connected to a clean 3.3-V rail. The internal LDO supports dynamic voltage scaling down to 1.35 V core voltage, optimizing active-mode power for computation-intensive metering algorithms.

How many independent 32-kHz crystal oscillator circuits does the MSP430F6736AIPZR support?

The MSP430F6736AIPZR supports exactly one 32-kHz crystal oscillator circuit via XIN/XOUT pins (pins 24/25), dedicated to the RTC_C module. This oscillator is temperature-compensated and calibrated in firmware using the built-in RTC calibration registers. No secondary 32-kHz crystal interface exists; auxiliary timing uses internal VLO or REFO sources, which lack crystal-level accuracy.

What LCD bias configuration does the MSP430F6736AIPZR support for 4-common, 80-segment displays?

The MSP430F6736AIPZR's LCD_C module supports 4-common (COM0–COM3) and up to 80 segment lines in static or 2/3/4-mux modes. For a 4-common, 80-segment display, it configures as 4 × 20 (4 commons × 20 segments), using internal charge pump and programmable voltage divider to generate VLCD = 2.6–3.3 V. The MSP430F6736AIPZR datasheet confirms this in Section 21.3.3, specifying fLCD = 32 kHz and contrast control via LCDCPCTL register.