Texas Instruments MSP430F2234IDAR

Overview

MSP430F2234IDAR from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring 8KB+256B flash, 512B RAM, dual operational amplifiers, 10-bit 200-ksps ADC with internal reference and DTC, two 16-bit timers (Timer_A and Timer_B), USCI_A0/USCI_B0 serial interfaces (UART/LIN/IrDA/SPI/I²C), and 32 I/O pins - deployed in sensor signal acquisition, battery-powered metering, and RF front-end control.

For engineers reviewing the MSP430F2234IDAR datasheet, MSP430F2234IDAR pinout, MSP430F2234IDAR application, or MSP430F2234IDAR equivalent, key selection criteria include its dual-op-amp analog front-end, 1.8–3.6 V supply range, sub-1 µs wake-up from LPM4, integrated brownout detector, and TSSOP-38 package compatibility with legacy MSP430F2xx designs.

Technical Context

The MSP430F2234IDAR implements a 16-bit RISC CPU with constant generators and seven addressing modes, executing register-to-register instructions in one CPU cycle. Its clock system integrates a digitally controlled oscillator (DCO) calibrated to ±1% across four frequencies up to 16 MHz, plus support for 32-kHz crystal, HF crystal (≤16 MHz), resonator, or external digital clock.

It features two independent 16-bit timers: Timer_A with three capture/compare registers and multiple clock sources (ACLK, SMCLK, INCLK, TACLK); Timer_B with three capture/compare registers, shadow registers, and TBOUTH output control. The USCI_A0 module supports enhanced UART with auto-baudrate detection (LIN), IrDA encoding/decoding, and synchronous SPI; USCI_B0 supports SPI and I²C master/slave operation.

Key Specifications

Pinout & Package

Package: 38-pin TSSOP (DA), JEDEC MO-153 compliant, thermal pad not present, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F2254IDAR and MSP430F2274IDAR, the MSP430F2234IDAR delivers optimal cost/performance balance for fixed-function sensor controllers where 8KB flash and 512B RAM are sufficient - avoiding over-provisioned memory while retaining all analog and timing peripherals.

Availability

MSP430F2234IDAR is available at Aetrix Electronics and suitable for smart metering, wireless sensor networks, portable medical devices, and industrial process monitors requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature ranges.

Supply support for MSP430F2234IDAR 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 with emphasis on energy efficiency, reliability, and system-level integration.

The MSP430F2234IDAR belongs to the MSP430F2xx ultra-low-power microcontroller family, designed specifically for battery-operated measurement systems requiring precision analog integration, rapid wake-up, and minimal active/standby power consumption.

FAQ

What is the maximum operating frequency of the MSP430F2234IDAR?

The MSP430F2234IDAR supports a maximum CPU clock (MCLK) of 16 MHz via its digitally controlled oscillator (DCO), which is factory-calibrated to ±1% accuracy at four frequencies. It also accepts external clock sources up to 16 MHz, including HF crystals, resonators, or digital clocks - enabling deterministic real-time execution for time-critical sensor sampling and control loops.

Does the MSP430F2234IDAR include hardware debug support?

Yes, the MSP430F2234IDAR integrates an Embedded Emulation Module (EEM) supporting full hardware debugging via Spy-Bi-Wire (2-wire JTAG). It works with TI's MSP-FET430UIF (USB) and MSP-FET430U38 (TSSOP-38 target board) for breakpoint setting, register inspection, and real-time trace - no external debug header or SWD adapter required.

How many analog input channels does the ADC10 support on the MSP430F2234IDAR?

The ADC10 module in the MSP430F2234IDAR supports up to 12 analog input channels (A0–A7, A12–A15), accessible through dedicated pins including P2.0, P2.1, P2.2, P2.3, P2.4, P3.0, P3.6, P3.7, P4.3, P4.4, P4.5, and P4.6. Channel selection is fully software-configurable with autoscan mode enabling sequential conversion without CPU intervention.

Can the operational amplifiers in the MSP430F2234IDAR be used independently?

Yes, the MSP430F2234IDAR includes two fully independent rail-to-rail operational amplifiers (OA0 and OA1), each with dedicated non-inverting/inverting inputs and output pins. They can be configured separately as amplifiers, comparators, filters, or voltage followers - with pin assignments confirmed in Tables 3 and 4 of the SLAS504G datasheet for the DA package.

What low-power modes are supported by the MSP430F2234IDAR?

The MSP430F2234IDAR supports six operating modes: Active Mode (AM) and five software-selectable low-power modes (LPM0–LPM4). LPM4 draws only 0.1 µA with RAM retention and wake-up in <1 µs - ideal for infrequently polled sensor applications. Each mode selectively disables MCLK, SMCLK, ACLK, and DCO to optimize power versus responsiveness.