Texas Instruments MSP430F135IPAG

Overview

MSP430F135IPAG from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring 16KB+256B flash, 512B RAM, a 12-bit ADC with 8 channels and <10 µs conversion time, one USART (UART/SPI), two 16-bit timers (Timer_A3 and Timer_B3), and on-chip comparator. It targets battery-powered sensor systems and portable measurement devices requiring sub-µA standby current and sub-6 µs wake-up.

For engineers reviewing the MSP430F135IPAG datasheet, MSP430F135IPAG pinout, MSP430F135IPAG application, or MSP430F135IPAG equivalent, key selection considerations include its 64-pin TQFP package, single USART interface, 48 I/O pins, 1.8–3.6 V supply range, and compatibility with TI's MSP430x1xx family toolchain and development ecosystem.

Technical Context

The MSP430F135IPAG implements a 16-bit CPU with constant generators and hardware multiplier for optimized code efficiency in low-power embedded control. Its clock system integrates DCO, ACLK, SMCLK, and MCLK domains with support for external crystals (LFXT1/XT2) and internal resistor-controlled oscillator (ROSC).

Peripherals are tightly coupled to the bus architecture: the 12-bit ADC12 supports autoscan and internal reference; Timer_A3 provides three capture/compare registers with PWM capability; Timer_B3 offers three capture/compare registers with shadow registers; and the single USART0 operates in asynchronous UART or synchronous SPI mode - all accessible via 48 general-purpose I/O pins with interrupt capability.

Key Specifications

Pinout & Package

TQFP-64 package (10 mm × 10 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad connected to DVSS. Pinout conforms to Figure 4-1 of SLAS272H (MSP430F13x series).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F133IPAG, the MSP430F135IPAG doubles flash and RAM while retaining identical peripherals and power profile; compared with MSP430F147IPAG, it trades USART count and timer depth for lower cost and smaller memory footprint-ideal for cost-sensitive, single-interface sensor endpoints.

Availability

MSP430F135IPAG is available at Aetrix Electronics and suitable for smart utility metering, portable environmental sensor nodes, and industrial process monitoring terminals requiring stable component supply and long-term manufacturability.

Supply support for MSP430F135IPAG 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 company delivering analog and embedded processing solutions for industrial, automotive, personal electronics, and communications markets.

The MSP430F135IPAG belongs to the MSP430x1xx ultra-low-power MCU family, designed specifically for battery-operated measurement and sensing applications where extended runtime and precision analog integration are critical.

FAQ

What is the maximum operating frequency of the MSP430F135IPAG?

The MSP430F135IPAG does not specify a maximum system clock frequency in its datasheet. Its digitally controlled oscillator (DCO) is calibrated to operate up to approximately 8 MHz under typical conditions, and the CPU executes instructions at 125 ns per cycle (8 MIPS). Actual achievable frequency depends on supply voltage and temperature; recommended operating conditions limit SMCLK to ≤8 MHz at 2.2–3.6 V.

Does the MSP430F135IPAG support JTAG debugging?

Yes, the MSP430F135IPAG supports full JTAG emulation via dedicated pins (TCK, TMS, TDI/TCLK, TDO/TDI) on its 64-pin TQFP package. This enables real-time debugging, flash programming, and boundary-scan testing using TI's MSP-FET or compatible debuggers. The JTAG fuse can be blown to disable further programming access after production.

How many analog input channels does the MSP430F135IPAG ADC support?

The MSP430F135IPAG integrates the ADC12 module with eight analog input channels (A0–A7), mapped to P6.0 through P6.7. All eight channels are accessible simultaneously in autoscan mode, and the ADC supports both internal (2.5 V) and external reference configurations with programmable sample-and-hold timing.

Is the MSP430F135IPAG pin-compatible with other MSP430F1xx devices in the same package?

Yes, the MSP430F135IPAG is pin-compatible with MSP430F133IPAG, MSP430F147IPAG, MSP430F148IPAG, and MSP430F149IPAG in the 64-pin TQFP (PAG) package. Signal mapping for shared peripherals (e.g., Timer_A, ADC inputs, GPIO) is consistent across the F13x/F14x families, though some pins (e.g., USART1, TB3–TB6) are no-connection or reserved on the MSP430F135IPAG.

What is the purpose of the ROSC pin on the MSP430F135IPAG?

The ROSC pin (P2.5) on the MSP430F135IPAG connects to an external resistor that sets the nominal frequency of the internal digitally controlled oscillator (DCO). This resistor-based tuning allows factory calibration and stable DCO operation without requiring an external crystal for basic timing, reducing BOM cost and board space in cost-sensitive applications.