Texas Instruments MSP430F1101AIPW

Overview

MSP430F1101AIPW from Texas Instruments is an ultralow-power 16-bit RISC mixed-signal microcontroller featuring 1 KB flash memory, 128 B RAM, a 16-bit Timer_A with three capture/compare registers, an on-chip analog comparator, and fourteen I/O pins. It operates from 1.8 V to 3.6 V, achieves 160 μA active current at 1 MHz/2.2 V, and wakes from standby in under 6 μs - optimized for battery-powered sensor systems and RF front ends.

For engineers reviewing the MSP430F1101AIPW datasheet, MSP430F1101AIPW pinout, MSP430F1101AIPW application, or MSP430F1101AIPW equivalent, key selection criteria include its 20-pin TSSOP (PW) package, LPM4 ultra-low-power mode (0.1 μA), integrated slope A/D capability via I/O pins, and JTAG/BSL programmability without external voltage.

Technical Context

The MSP430F1101AIPW implements a 16-bit RISC CPU with seven addressing modes and constant generators for high code efficiency. Its basic clock module supports multiple sources: internal DCO (stabilizes <6 μs), 32-kHz crystal, high-frequency crystal, resonator, or external clock - enabling flexible low-power timing across operating modes.

It integrates Timer_A3 with three independent capture/compare registers, supporting PWM generation, interval timing, and input capture with interrupt capability per channel. The analog comparator provides precision slope A/D conversion, battery monitoring, and external signal supervision - directly interfacing with P2.2 (CAOUT), P2.3 (CA0), and P2.4 (CA1).

Key Specifications

Pinout & Package

Package: 20-pin TSSOP (PW), body width 4.4 mm, pitch 0.65 mm, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F1121AIPW, the MSP430F1101AIPW trades memory capacity for cost-sensitive deployment; versus MSP430G2553IPW28, it offers lower pin count and proven ultra-low-power stability in legacy sensor designs - making it optimal for minimal-footprint, long-life embedded control.

Availability

MSP430F1101AIPW is available at Aetrix Electronics and suitable for wireless sensor nodes, battery-powered data loggers, RF front-end controllers, and low-cost smart meter interfaces requiring stable component supply and long-term manufacturability.

Supply support for MSP430F1101AIPW 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 for industrial, automotive, and consumer markets.

The MSP430F1101AIPW belongs to the MSP430x11x1(A) ultralow-power microcontroller family, designed specifically for portable measurement and battery-operated sensor applications where extended runtime and minimal system-level power management overhead are critical.

FAQ

What is the maximum operating frequency of the MSP430F1101AIPW at 3.6 V?

The MSP430F1101AIPW supports a maximum system clock (MCLK) frequency of 8 MHz at 3.6 V, as specified in the recommended operating conditions. This applies when executing code from flash memory and using the internal DCO or external crystal/resonator. At lower supply voltages (e.g., 1.8 V), the maximum frequency is reduced to 4.15 MHz to maintain timing margins and reliability.

Does the MSP430F1101AIPW support in-system programming without external hardware?

Yes, the MSP430F1101AIPW supports in-system programming via its built-in bootstrap loader (BSL), which operates over UART using P1.1 (TX) and P2.2 (RX). No external programming voltage or JTAG debugger is required - only a simple level-shifted UART interface is needed to load new firmware or update parameters in the field.

What are the absolute maximum ratings for VCC and I/O pins on the MSP430F1101AIPW?

The absolute maximum rating for VCC is −0.3 V to 4.1 V relative to VSS. For any I/O pin, the voltage must remain within −0.3 V to VCC + 0.3 V. Exceeding these limits may cause permanent damage. Note that the TEST pin accepts a higher fuse-blow voltage (VFB) during JTAG security configuration, but this is a controlled, transient condition outside normal operation.

Can the MSP430F1101AIPW perform analog-to-digital conversion without an external ADC?

Yes, the MSP430F1101AIPW can perform slope-based analog-to-digital conversion using its on-chip analog comparator and Timer_A. By charging a capacitor through a resistive sensor and measuring the time to reach a reference voltage, the device converts resistance changes into digital values - eliminating the need for a separate ADC in applications like thermistor or potentiometer reading.

Which low-power mode provides the lowest current consumption while retaining RAM contents?

LPM4 provides the lowest current consumption (0.1 μA typical at 25°C) while retaining full RAM contents and allowing wake-up via RST/NMI or external interrupt. In LPM4, all clocks including ACLK are disabled, the DCO is off, and the crystal oscillator stops - making it ideal for long-duration sleep between infrequent sensor readings or RF events.