Texas Instruments MSP430F1132IRHBR

Overview

MSP430F1132IRHBR from Texas Instruments is an ultralow-power 16-bit RISC microcontroller with 8KB flash, 256B RAM, 10-bit 200-ksps ADC with internal reference and autoscan, 16-bit Timer_A with three capture/compare registers, and basic clock module supporting 32-kHz crystal or external resistor tuning. It operates from 1.8 V to 3.6 V and targets battery-powered sensor nodes and portable measurement systems.

For engineers reviewing the MSP430F1132IRHBR datasheet, MSP430F1132IRHBR pinout, MSP430F1132IRHBR application, or MSP430F1132IRHBR equivalent, key selection criteria include active-mode current (200 µA @ 1 MHz), wake-up time (<6 µs), 20-pin TSSOP/QFN package compatibility, and absence of integrated USART-distinguishing it from MSP430x12x2 variants.

Technical Context

The MSP430F1132IRHBR implements a 16-bit RISC CPU with constant generators and seven addressing modes, enabling single-cycle register operations. Its five low-power modes-including LPM4 with ACLK disabled and DCO stopped-support extended battery life in intermittent-sensing applications.

It integrates a digitally controlled oscillator (DCO) for sub-6-µs wake-up, a 10-bit SAR ADC with data transfer controller (DTC) for autonomous sampling, and Timer_A3 with three independent capture/compare channels for PWM generation, input capture, and interval timing-all accessible via memory-mapped peripherals at fixed SFR addresses.

Key Specifications

Pinout & Package

Package: 32-pin QFN (RHB), 5 mm × 5 mm, 0.5 mm pitch, with exposed thermal pad connected to VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F1132IRHBR, MSP430F1122IRHBR offers reduced memory at lower cost but no feature expansion, while MSP430F1232IRHBR adds communication capability at the expense of pin-count mismatch and higher system integration effort.

Availability

MSP430F1132IRHBR is available at Aetrix Electronics and suitable for smart utility meters, portable medical devices, industrial transmitters, and wireless fire safety systems requiring stable component supply across long-lifecycle deployments.

Supply support for MSP430F1132IRHBR 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 specializing in analog, embedded processing, and connectivity technologies with over 90 years of innovation in power-efficient silicon design.

The MSP430x11x2 product line was engineered specifically for ultralow-power sensing and measurement applications where battery life, compact size, and integrated analog functionality are primary constraints.

FAQ

What is the maximum operating frequency of the MSP430F1132IRHBR?

The MSP430F1132IRHBR does not specify a maximum clock frequency in its datasheet; instead, it guarantees 125 ns instruction cycle time at 1 MHz, and its digitally controlled oscillator (DCO) is tuned for stability across 1.8–3.6 V supply. Performance is optimized for ultralow-power operation-not raw speed-so typical use cases run at ≤1 MHz to minimize active-mode current (200 µA @ 1 MHz, 2.2 V). The MSP430F1132IRHBR achieves deterministic timing through its 16-bit RISC architecture and constant generators, not high-frequency clocks.

Does the MSP430F1132IRHBR include a hardware UART or USART peripheral?

No, the MSP430F1132IRHBR does not include a hardware UART or USART. That peripheral is exclusive to the MSP430x12x2 family (e.g., MSP430F1232IRHBR). The MSP430F1132IRHBR relies on software-based bit-banged serial communication if asynchronous protocols are needed. Its peripheral set includes Timer_A, 10-bit ADC, basic clock module, and JTAG debug interface-but no dedicated serial communication engine. This omission reduces die size and power consumption, aligning with its role in simple, low-data-rate sensing applications.

What package type is used for the MSP430F1132IRHBR?

The MSP430F1132IRHBR uses a 32-pin QFN (quad flat no-lead) package with designation RHB: 5 mm × 5 mm body, 0.5 mm pin pitch, and an exposed thermal pad. This package is distinct from the 20-pin TSSOP (PW) and 20-pin SOWB (DW) options listed for other MSP430F1132 variants. The RHB package supports higher I/O count (14 GPIOs across Ports P1 and P2) and improved thermal performance versus smaller packages, making it suitable for space-constrained yet thermally demanding embedded designs.

How much flash memory does the MSP430F1132IRHBR have, and is it reprogrammable in-system?

The MSP430F1132IRHBR contains 8KB of on-chip flash memory organized into 16 segments of 512 bytes each, plus 256 bytes of RAM. Flash is fully reprogrammable in-system via JTAG interface or bootstrap loader (BSL) using UART-no external programming voltage is required. The BSL supports password-protected access and enables field firmware updates. Memory map reserves 0xFFFF–0xFFE0 for interrupt vectors and 0x1000–0x10FF for information memory (used for calibration data or user configuration).

What are the key differences between MSP430F1132IRHBR and MSP430F1232IRHBR?

The MSP430F1132IRHBR and MSP430F1232IRHBR share 8KB flash, 256B RAM, and core peripherals like Timer_A and 10-bit ADC, but differ critically: MSP430F1232IRHBR adds USART0 (UART/SPI), Port P3 (8 additional I/O), and uses a 28-pin package (DW/PW) or 32-pin RHB-whereas MSP430F1132IRHBR has no USART, only Ports P1/P2 (14 total I/O), and is offered exclusively in 32-pin RHB. Functionally, MSP430F1232IRHBR supports serial communication out-of-box; MSP430F1132IRHBR does not.