MSP430F1132IRHBT - 16-bit 8MHz 8KB Flash MCU | TI
MPN: MSP430F1132IRHBT ✓ ActiveMSP430F1132IRHBT Overview
An MCU (microcontroller unit) is a single-chip computer that integrates a processor core, memory, and peripherals into one package. Within the power-management hierarchy of embedded systems, ultra-low-power MCUs such as the MSP430 family occupy the battery-operated endpoint of the spectrum, where energy per instruction matters more than raw throughput.
Key features include a supply voltage range of 1.8V to 3.6V, five power-saving modes, wake-up from standby in less than 6 microseconds, and an FLL+ frequency-locked loop for flexible clock generation. Ultralow-power figures are exceptional: 200 uA active at 1 MHz and 2.2V, 0.7 uA standby, and 0.1 uA off-mode with RAM retention, extending battery life by years in portable instruments.
Technically, the device uses a 16-bit RISC CPU with 16-bit registers and a 125-ns instruction cycle time, paired with a 10-bit ADC, Timer_A, and SPI/UART serial interfaces. The Flash-based memory supports in-system programming, easing field upgrades. The Scan IF capability supports background sensing applications.
Typical applications include battery-powered portable measurement instruments, metering front ends, sensor acquisition nodes using the 10-bit ADC, and low-power communication endpoints using SPI/UART.
When designing, budget clock sources carefully: the FLL+ lets you trade speed for current, so run at the lowest frequency that meets your real-time deadline.
This page synthesizes distributor availability data, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for MSP430F1132IRHBT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
MSP430F1232IRHBT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MSP430F1222IRHBT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MSP430F1122IRHBT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MSP430F1111AIRHBT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MSP430F1101AIRHBT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MSP430F1132IRHBT Maximum Ratings & Electrical Characteristics
| Core | MSP430 CPU16 16-bit RISC |
| Maximum Clock Frequency | 8 MHz |
| Flash Memory | 8KB (8K x 8 + 256B) |
| SRAM | 256 B |
| Supply Voltage Range | 1.8 V to 3.6 V |
| Active Mode Current | 200 uA at 1 MHz, 2.2 V |
| Standby Mode Current | 0.7 uA |
| Off Mode Current (RAM Retention) | 0.1 uA |
| Wake-Up Time From Standby | < 6 us |
| Instruction Cycle Time | 125 ns |
| ADC Resolution | 10-bit |
| Communication Interfaces | SPI, UART |
| Timers | Timer_A |
| Power Saving Modes | 5 |
| Clock System | FLL+ frequency-locked loop |
| Operating Temperature | -40C to +85C (I grade) |
| Package | 32-VQFN (5x5 mm), RHBT |
| Mounting Type | Surface Mount |
MSP430F1132IRHBT 32-vqfn (5x5 mm), rhbt Pin Configuration Guide
Pin configuration for MSP430F1132IRHBT (32-vqfn (5x5 mm), rhbt package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for MSP430F1132IRHBT.
Refer to the datasheet for full pin configuration.
Typical Applications
MSP430F1132IRHBT is suitable for 6 applications: Battery-Powered Portable Measurement, Sensor Acquisition Nodes, Low-Power Communication Endpoints, Metering Front Ends, Handheld Instruments and Test Probes, Industrial Monitoring and Control.
Battery-Powered Portable Measurement
The MSP430F1132IRHBT was architected specifically for portable battery measurement instruments: 200 uA active current at 1 MHz/2.2V, 0.7 uA standby, and 0.1 uA off-mode with RAM retention allow a CR2032 coin cell to power the system for years in duty-cycled use. The sub-6-microsecond wake-up from standby lets the MCU sleep between samples and respond instantly to sensor events, while the FLL+ clock system scales frequency (and current) to the task at hand. With a 1.8V to 3.6V supply range, the design runs directly from the battery without a regulator, eliminating quiescent losses.
Recommended
Sensor Acquisition Nodes
With an integrated 10-bit ADC, Timer_A for precise sampling intervals, and SPI for external converters, the MSP430F1132IRHBT serves as a compact sensor acquisition controller. The 8KB Flash accommodates calibration tables, filtering firmware, and communication stacks in a single chip, while 256B SRAM handles sample buffering. Designers typically trigger ADC conversions from Timer_A at fixed intervals, average results in RAM, and push data over UART - all within the microamp-class energy budget that defines the MSP430x1xx family.
Recommended
Low-Power Communication Endpoints
The on-chip USART supporting SPI and UART makes the MSP430F1132IRHBT suitable for low-power communication endpoints such as wireless module front ends and industrial sensor links. The MCU can sleep at 0.7 uA between messages, wake in under 6 microseconds on a received interrupt, unpack the frame, and respond - an energy profile ideal for RS-232/RS-485 nodes and sub-GHz radio bridges. The 8 MHz CPU executes protocol handling fast enough to return to sleep within milliseconds, minimizing per-transaction charge consumption.
Recommended
Metering Front Ends
MSP430 devices are widely deployed in energy and flow metering. The MSP430F1132IRHBT's 10-bit ADC digitizes analog front-end outputs while Timer_A provides accurate integration windows; the 16-bit RISC core performs accumulation and scaling math in firmware. The 0.1 uA RAM-retention mode preserves calibration data across battery replacement events, and the industrial -40C to +85C I-grade temperature range suits outdoor meter enclosures. Flash-based memory enables field recalibration without socketed parts.
Recommended
Handheld Instruments and Test Probes
Handheld test tools benefit from the MSP430F1132IRHBT's balance of responsiveness and efficiency: the 125-ns instruction cycle at 8 MHz gives snappy user-interface response, while five power-saving modes extend shift-long battery operation. The 8KB Flash holds menu-driven firmware and lookup tables; SPI connects display drivers or precision converters. Wake-up from standby in under 6 microseconds means the device can sit dormant until a button press or trigger event, then immediately begin measurements.
Recommended
Industrial Monitoring and Control
In industrial monitoring nodes, the MSP430F1132IRHBT's I-grade (-40C to +85C) rating, brownout-safe 1.8V to 3.6V operation, and 16-bit core provide dependable low-cost control. UART connectivity links to field buses and telemetry radios, while the 10-bit ADC supervises analog alarms. Its 0.7 uA standby current suits battery-backed nodes that must survive power outages, and the 8KB Flash retains application and event-log firmware through field updates - important for distributed installations where physical access is expensive.
Recommended
Recommended Products Summary
Engineering reference data for MSP430F1132IRHBT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MSP430F1232IRHBT | MSP430F1222IRHBT | MSP430F1122IRHBT | MSP430F1101AIRHBT |
|---|---|---|---|---|---|
| Package | 32-VQFN (5x5 mm), RHBT | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Flash Memory | 8KB | 8KB | 4KB | 4KB | 1KB |
| SRAM | 256B | 256B | 256B | 256B | 128B |
| Maximum CPU Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Supply Voltage Range | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Standby Current | 0.7 uA | 0.7 uA | 0.7 uA | 0.7 uA | 0.7 uA |
Key Differentiators
- Double the Flash for code headroom (vs MSP430F1222IRHBT)
- Full SPI/UART connectivity (vs MSP430F1122IRHBT)
- Industry-defining standby current (vs Generic 8-bit MCUs (e.g., PIC16/ATmega class))
Design Notes
Design the power budget around the three documented operating points: 200 uA active at 1 MHz/2.2V, 0.7 uA standby, and 0.1 uA off-mode with RAM retention. Duty-cycling is the key lever: sleep at 0.7 uA between Timer_A-driven samples and the average current can stay near single-digit microamps. Because the part runs from 1.8V to 3.6V, powering directly from a coin cell removes regulator quiescent current. If a regulator is required, choose one with Iq well below the MCU standby current (for example, a sub-1-uA LDO such as the XC9209/XC6209 class).
Decouple DVCC with a 100 nF ceramic capacitor placed within 2 mm of the VQFN pad, plus bulk 4.7-10 uF near the battery. Separate analog (AVCC/AVSS) and digital grounds with a single-point star connection to protect the 10-bit ADC from digital return currents. The 5x5 mm VQFN thermal pad area is small, so keep high-current traces away from the analog pins. Route the JTAG/Test and RST/NMI pins to a 2.54 mm or Tag-Connect footprint for in-system programming access.
Verify Flash sizing before migration: lower-memory family members (F1122, F1222, F1101A) are pin-compatible but offer only 4KB or less versus 8KB, and C compiler overhead can push borderline images over budget. Second, the 8 MHz maximum applies to the CPU via the FLL+; do not exceed it with DCO settings. Third, respect the sub-6-us wake-up claim by keeping the VCO retained in standby - entering deeper off modes trades wake-up latency and SRAM contents for the 0.1 uA floor.
Compliance Information
Compliance data was not present in the provided verified web data; consult the TI product page quality section for MSP430F1132 RoHS/REACH status.
