Texas Instruments MSP430F1132IDWR

Overview

MSP430F1132IDWR from Texas Instruments is an ultralow-power 16-bit RISC microcontroller with 8KB+256B flash memory, 256B RAM, 10-bit 200-ksps ADC with internal reference and autoscan, 16-bit Timer_A with three capture/compare registers, and five power-saving modes. It operates from 1.8 V to 3.6 V and achieves active-mode current of 200 µA at 1 MHz/2.2 V-ideal for battery-powered sensor nodes and portable measurement systems.

For engineers reviewing the MSP430F1132IDWR datasheet, MSP430F1132IDWR pinout, MSP430F1132IDWR application, or MSP430F1132IDWR equivalent, this page delivers verified functional identity, validated 20-pin TSSOP pin mapping, confirmed low-power timing behavior, and real-world substitution guidance aligned with TI's MSP430x11x2 family documentation (SLAS361D).

Technical Context

The MSP430F1132IDWR implements a 16-bit RISC CPU with constant generators and seven addressing modes, enabling single-cycle register operations. Its basic clock module supports multiple sources-including internal DCO (wake-up <6 µs), 32-kHz crystal, and external resistor-feeding ACLK, SMCLK, and MCLK domains independently.

It integrates a 10-bit SAR ADC with integrated reference, sample-and-hold, autoscan, and data transfer controller (DTC), plus Timer_A3 with three independent capture/compare registers supporting PWM, interval timing, and input capture. No USART is present-this is an MSP430x11x2 device, distinguishing it from x12x2 variants.

Key Specifications

Pinout & Package

Package: 20-pin plastic TSSOP (PW), body size 6.5 mm × 4.4 mm, 0.65 mm pitch. Pin 1 marked by beveled corner; thermal pad not present (unlike QFN variants).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F1132IDWR, the F1122IDWR reduces flash capacity by 50% but maintains identical low-power behavior and peripherals-making it viable only for minimal firmware. The F1132IPW offers identical functionality in an alternate TSSOP variant, enabling layout reuse across assembly lines.

Availability

MSP430F1132IDWR is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, industrial condition monitors, and smart utility meter sensor hubs requiring stable component supply and long-term manufacturability.

Supply support for MSP430F1132IDWR 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 low-power design.

The MSP430x11x2 product line was engineered specifically for ultralow-power portable measurement applications-emphasizing extended battery life, rapid wake-up, and integrated mixed-signal peripherals in compact packages.

FAQ

What is the maximum ADC sampling rate supported by the MSP430F1132IDWR?

The MSP430F1132IDWR supports a maximum ADC sampling rate of 200 ksps (kilo-samples per second) with its 10-bit successive approximation register (SAR) core. This rate is achievable under optimal conditions-using internal reference, autoscan disabled, and conversion clock derived from SMCLK. The DTC can autonomously store results to RAM without CPU overhead, preserving low-power operation during high-speed acquisition sequences.

Does the MSP430F1132IDWR include a hardware UART or USART peripheral?

No, the MSP430F1132IDWR does not include a hardware UART or USART. It belongs to the MSP430x11x2 family, which omits serial communication peripherals. Unlike the x12x2 series, this device lacks USART0-so UART functionality must be implemented in firmware using GPIO and Timer_A (bit-banged), or external transceivers must be used. This distinction is clearly documented in SLAS361D section "Functional Block Diagram" and "Terminal Functions".

What package type and pin count does the MSP430F1132IDWR use?

The MSP430F1132IDWR uses a 20-pin plastic TSSOP (Thin Shrink Small Outline Package), designated as PW in TI's ordering nomenclature. It measures 6.5 mm × 4.4 mm with 0.65 mm lead pitch. Pin 1 is located at the beveled corner; no thermal pad is present. This matches the pinout shown in Figure 1 of SLAS361D for DW/PW packages, confirming full compatibility with standard TSSOP footprints.

How does the MSP430F1132IDWR achieve its 0.1 µA off-mode current?

The MSP430F1132IDWR achieves 0.1 µA off-mode current by disabling all clocks-including MCLK, SMCLK, ACLK, and the DCO-while retaining RAM content via isolated VCC/VSS rails. Brownout protection remains active, and the RST/NMI pin retains wake capability. This state is entered via software-controlled LPM4, verified in SLAS361D section "Operating Modes". External circuitry must avoid leakage paths (e.g., unconnected pins left floating) to maintain datasheet-spec current.

Is the MSP430F1132IDWR pin-compatible with the MSP430F1232IDWR?

No, the MSP430F1132IDWR is not pin-compatible with the MSP430F1232IDWR. The F1132IDWR is a 20-pin device (TSSOP/SOWB), while the F1232IDWR is a 28-pin device (TSSOP/SOWB) with additional P3.x I/O and USART0 signals. Their pinouts differ fundamentally-e.g., P3.0–P3.7 appear only on the 28-pin variant-and SLAS361D explicitly separates their terminal function tables. Substitution would require PCB redesign.