Texas Instruments MSP430F6735AIPZ

Overview

MSP430F6735AIPZ from Texas Instruments is an 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 supporting up to 320 segments, and four enhanced USCI modules (three UART/IrDA/SPI + one I²C). Its 128 KB flash, 4 KB RAM, and 72 GPIO in 100-pin LQFP package support single-phase electronic watt-hour meter implementations with RTC, hardware multiplier, and DMA.

For engineers reviewing the MSP430F6735AIPZ datasheet, MSP430F6735AIPZ pinout, MSP430F6735AIPZ application, or MSP430F6735AIPZ equivalent, key selection criteria include its triple 24-bit SD24_B ADC architecture, auxiliary supply subsystem for backup RTC operation, low-power LPM3.5 mode (1.24 µA), and metering-specific peripherals including crystal offset calibration and temperature-compensated RTC.

Technical Context

The MSP430F6735AIPZ implements a 16-bit RISC CPU with 25-MHz system clock capability, unified clock system featuring FLL, VLO, REFO, and XT1 crystal support, and flexible power management with integrated LDO and dual auxiliary supplies. Its peripheral set is architected for metrology-grade signal acquisition: three independent 24-bit sigma-delta ADCs each support differential PGA inputs, while the 10-bit ADC provides six external and two internal channels including on-die temperature sensing.

It features four 16-bit timers (one with three capture/compare registers, three with two each), three eUSCI_A modules supporting automatic baud-rate detection and IrDA, and one eUSCI_B module supporting I²C with multi-address capability and SPI. The device includes password-protected RTC with crystal calibration, 4×16-bit backup memory, and contrast-controlled LCD_C driver operating in 8-mux mode.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PZ), 14 mm × 14 mm, surface-mount, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power metrology microcontroller applications.

Compared with MSP430F6735AIPZ, the MSP430F6736AIPZ offers higher RAM capacity for complex communication protocols, while the MSP430F6734AIPZ reduces flash size to lower unit cost-both maintain identical metrology performance, pin compatibility, and power characteristics.

Availability

MSP430F6735AIPZ is available at Aetrix Electronics and suitable for single-phase watt-hour meters, energy monitoring gateways, and smart grid sensor nodes requiring stable component supply, long-term lifecycle support, and traceable sourcing for utility-certified designs.

Supply support for MSP430F6735AIPZ 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, with leadership in low-power microcontrollers and precision analog for industrial and energy infrastructure markets.

The MSP430F673xA family is engineered specifically for revenue-grade energy metering, integrating metrology-optimized ADCs, RTC, LCD, and communication peripherals into a single ultra-low-power SoC platform.

FAQ

What is the maximum system clock frequency supported by the MSP430F6735AIPZ?

The MSP430F6735AIPZ supports a maximum system clock frequency of 25 MHz, enabled by its integrated FLL (Frequency-Locked Loop) that stabilizes the DCO (Digitally Controlled Oscillator) using either internal reference sources (REFO/VLO) or external crystals. This allows high-speed execution of metrology algorithms while maintaining ultra-low active-mode current consumption of 265 µA/MHz at 3.0 V.

Does the MSP430F6735AIPZ support crystal-based RTC with temperature compensation?

Yes, the MSP430F6735AIPZ includes a password-protected RTC module with crystal offset calibration and temperature compensation. It uses the 32-kHz XT1 crystal oscillator and internal temperature sensor to dynamically adjust timing accuracy across –40°C to 85°C, meeting IEC 62053-21 requirements for utility meter timekeeping stability.

How many analog input channels does the MSP430F6735AIPZ provide for energy measurement?

The MSP430F6735AIPZ provides nine dedicated analog input channels for energy measurement: six external channels via the 10-bit ADC (ADC10_A), plus three fully differential 24-bit sigma-delta ADC (SD24_B) channels-each with programmable gain amplifier-supporting simultaneous voltage, current, and neutral current sampling.

What LCD segment count and mux configuration does the MSP430F6735AIPZ support?

The MSP430F6735AIPZ integrates the LCD_C peripheral supporting up to 320 segments in 8-mux mode. It provides 4 COM lines (COM0–COM3) and 72 SEG lines (via P1–P8 ports), enabling direct drive of large-format numeric and alphanumeric displays without external controllers-ideal for utility meter front panels.

Is the MSP430F6735AIPZ pin-compatible with other devices in the MSP430F673xA family?

Yes, the MSP430F6735AIPZ is pin-compatible with all 100-pin LQFP (PZ) variants in the MSP430F673xA family-including MSP430F6736AIPZ, MSP430F6734AIPZ, and MSP430F6733AIPZ-sharing identical pin mapping, power domains, and peripheral signal assignments, enabling drop-in firmware and layout reuse across performance tiers.