Texas Instruments MSP430F6436IPZ

Overview

MSP430F6436IPZ from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller with 128 KB flash, 18 KB RAM, integrated 3.3-V LDO, 12-bit ADC (200 ksps, 16 channels), dual 12-bit DACs, LCD driver (160 segments), RTC, and four 16-bit timers - used in battery-powered sensor interfaces and portable metering systems.

For engineers reviewing the MSP430F6436IPZ datasheet, MSP430F6436IPZ pinout, MSP430F6436IPZ application, or MSP430F6436IPZ equivalent, key selection criteria include standby current (1.8 µA at 3.0 V), wake-up time (3 µs), 74 GPIO count, LQFP-100 package compatibility, and dual USCI modules supporting UART/IrDA/SPI/I²C.

Technical Context

The MSP430F6436IPZ implements a 16-bit RISC CPUXV2 core with constant generators and unified clock system featuring FLL stabilization, VLO, REFO, XT1 (32 kHz), and XT2 (up to 32 MHz). Its power architecture includes programmable LDO core regulation, supply supervision, and five low-power modes (LPM0–LPM4.5).

Peripherals are tightly synchronized via DMA (6-channel), enabling autonomous operation: ADC12_A supports autoscan across 12 external + 4 internal channels; USCI_A0/A1 provide enhanced UART with auto-baud detection and IrDA; USCI_B0/B1 support I²C master/slave and SPI; Timer_B0 offers 7 capture/compare registers for PWM and timing control.

Key Specifications

Pinout & Package

LQFP-100 package (14 mm × 14 mm), thermally enhanced with exposed thermal pad; 74 general-purpose I/O pins, including 16 dedicated LCD segment pins and 8 common pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6438IPZ, the MSP430F6436IPZ trades 128 KB flash capacity for identical peripheral set and power profile - ideal for cost-constrained designs with fixed firmware size; versus MSP430F6435IPZ, it adds dual 12-bit DACs enabling closed-loop analog control absent in the DAC-less variant.

Availability

MSP430F6436IPZ is available at Aetrix Electronics and suitable for hand-held meters, digital thermostats, analog sensor systems, and digital motor control applications requiring stable component supply and long-term industrial availability.

Supply support for MSP430F6436IPZ 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 specializing in analog, embedded processing, and connectivity technologies with leadership in low-power design and industrial-grade reliability.

The MSP430F6436IPZ belongs to TI's MSP430F643x ultra-low-power MCU family, engineered for extended battery life in portable measurement and sensor interface applications - emphasizing precision analog integration, real-time responsiveness, and minimal active/standby power.

FAQ

What is the maximum system clock frequency supported by the MSP430F6436IPZ?

The MSP430F6436IPZ supports a maximum system clock (MCLK) frequency of 20 MHz, achieved using the FLL with XT2 (high-frequency crystal) up to 32 MHz as a reference source. This 20-MHz limit ensures stable operation within its specified voltage range (1.8 V to 3.6 V) and thermal envelope. The device also supports lower-frequency clocks including ACLK (32 kHz crystal or REFO/VLO) and SMCLK for peripheral timing - all managed through the unified clock system. MSP430F6436IPZ does not operate reliably above 20 MHz under standard conditions.

Does the MSP430F6436IPZ include an integrated DC-DC converter?

No, the MSP430F6436IPZ does not include an integrated DC-DC converter. It features a fully integrated low-dropout regulator (LDO) that generates a regulated 1.9-V core supply (VCORE) from a 3.3-V DVCC input. This LDO provides clean, noise-isolated power for the CPU and digital logic but does not perform voltage step-up or step-down conversion. External DC-DC converters must be used if input voltage falls outside the 1.8–3.6 V operating range or if higher efficiency is required beyond LDO capabilities. MSP430F6436IPZ relies on this LDO for internal core regulation only.

How many I²C interfaces does the MSP430F6436IPZ support, and which pins are assigned?

The MSP430F6436IPZ supports two I²C interfaces via USCI_B0 and USCI_B1 modules. USCI_B0 uses pins P3.6 (UCB0SCL) and P3.7 (UCB0SDA); USCI_B1 uses P8.6 (UCB1SCL) and P8.5 (UCB1SDA). Both modules support standard-mode (100 kbps) and fast-mode (400 kbps) I²C, with automatic clock stretching and multi-master arbitration. Pin assignments are fixed per module and cannot be remapped. MSP430F6436IPZ does not support I²C on alternate pins or additional instances beyond these two hardware blocks.

What is the function of the LCDCAP/R33 pin on the MSP430F6436IPZ, and how must it be handled?

The LCDCAP/R33 pin on the MSP430F6436IPZ serves as the external capacitor connection for the internal LCD charge pump. When the LCD_B module is enabled, this pin must be connected to a 2.2-µF ceramic capacitor tied to DVSS (ground) to stabilize the internal voltage doubler. If the LCD is unused, TI documentation explicitly requires LCDCAP/R33 to be connected directly to DVSS to prevent floating node issues and ensure reliable operation of adjacent analog circuitry. Leaving it unconnected violates the device's electrical specifications and may cause erratic behavior in ADC or comparator functions. MSP430F6436IPZ functionality depends on correct LCDCAP/R33 termination per application state.

Can the MSP430F6436IPZ operate from a single 3.3-V supply without external regulators?

Yes, the MSP430F6436IPZ can operate from a single 3.3-V supply. Its integrated LDO accepts 3.3-V DVCC and regulates it down to 1.9-V VCORE for the CPU and digital logic, while analog peripherals (ADC, DAC, comparator) use AVCC derived from DVCC. All required supply rails - DVCC, AVCC, DVSS, AVSS - are internally connected or routed through designated pins. No external regulator is needed unless operating outside the 1.8–3.6 V range or requiring ultra-low-noise analog supplies. Proper decoupling (e.g., 100-nF ceramics near DVCC/AVCC pins) is mandatory. MSP430F6436IPZ is designed for single-rail simplicity in space-constrained, battery-powered systems.