My Inquiry
My Account
Texas Instruments MSP430F5521IPNR
- Part No.:
- MSP430F5521IPNR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 80-LQFP
- Datasheet:
-
MSP430F5521IPNR.pdf
- Description:
- IC MCU 16BIT 32KB FLASH 80LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:957
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MSP430F5521IPNR from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller with integrated USB 2.0 PHY, 32 KB Flash, 6 KB + 2 KB RAM, 12-bit ADC (14 external + 2 internal channels), four 16-bit timers, two USCI modules (UART/IrDA/SPI/I²C), RTC, and 63 GPIO pins in an 80-pin LQFP package. It targets battery-powered sensor systems requiring USB connectivity and precise analog measurement.
For engineers reviewing the MSP430F5521IPNR datasheet, MSP430F5521IPNR pinout, MSP430F5521IPNR application, or MSP430F5521IPNR equivalent, key selection criteria include USB PHY integration, 12-bit ADC channel count and autoscan capability, low-power LPM3/LPM4 current (1.9 µA / 1.1 µA), 3.5 µs wake-up time, and full RAM retention in standby modes.
Technical Context
The MSP430F5521IPNR implements a unified clock system with FLL stabilization, dual crystal support (XT1 for 32-kHz RTC, XT2 up to 32 MHz), and multiple internal sources (VLO, REFO). Its power management includes a programmable LDO core regulator, supply voltage supervision (SVM/SVS), and brownout reset - enabling robust operation across 1.8–3.6 V.
Peripherals are memory-mapped and controlled via dedicated registers: the 12-bit ADC12_A supports sample-and-hold, internal reference, and autoscan across 14 external inputs; Timer_B0 provides seven capture/compare shadow registers for complex PWM generation; USB module integrates PHY, PLL, and dual-voltage (3.3 V / 1.8 V) power system with eight endpoints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with constant generators and 25-MHz max system clock - enables efficient C code execution and deterministic real-time response. |
| Flash / RAM | 32 KB Flash + 6 KB + 2 KB RAM - sufficient for USB stack, sensor firmware, and data buffering without external memory. |
| ADC Resolution | 12-bit ADC with 200 ksps sampling rate and autoscan - supports simultaneous multi-channel analog acquisition for sensor fusion. |
| USB Interface | Full-speed USB 2.0 with integrated PHY, PLL, and 3.3-V/1.8-V power system - eliminates external transceiver and simplifies USB compliance design. |
| Low-Power Modes | LPM3: 1.9 µA (RTC active, full RAM retention); LPM4: 1.1 µA (full RAM retention); LPM4.5: 0.18 µA - extends battery life in always-on monitoring applications. |
| Wake-up Time | 3.5 µs from LPM3 to active mode - meets fast-response requirements for event-triggered sensing and communication. |
| I/O Count | 63 GPIO pins with configurable drive strength, Schmitt-trigger inputs, and peripheral multiplexing - supports dense sensor interfacing and flexible board layout. |
Pinout & Package
The MSP430F5521IPNR is housed in an 80-pin LQFP (PN) package measuring 12 mm × 12 mm with exposed thermal pad (not electrically connected). Pin functions follow TI's standard MSP430F552x PN pinout, validated per SLAS590N Rev. September 2018.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0/TA0CLK/ACLK | Port 1 Bit 0 / Timer_A0 Clock / Auxiliary Clock | Configurable as GPIO, timer input, or 32-kHz RTC clock source - enables flexible clock tree routing and low-jitter timing. |
| P5.4/XIN & P5.5/XOUT | Crystal Oscillator Input/Output | Supports 32-kHz watch crystal for RTC - ensures accurate timekeeping with minimal external components. |
| P5.2/XT2IN & P5.3/XT2OUT | High-Frequency Crystal Input/Output | Drives up to 32-MHz crystal for system clock - delivers high-speed processing while maintaining low EMI via controlled drive strength. |
| PU.0/DP & PU.1/DM | USB Differential Data Lines | Integrated full-speed USB transceiver I/O - requires only series resistors and ESD protection; no external PHY needed. |
| RST/NMI/SBWTDIO | Reset / Non-Maskable Interrupt / Spy-Bi-Wire I/O | Single-pin debug interface for programming and emulation - reduces PCB footprint and simplifies production test access. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated USB 2.0 PHY | Eliminates external transceiver, reduces BOM cost and layout complexity, and ensures USB electrical compliance out-of-box. |
| 12-bit ADC with Autoscan | Automatically sequences conversions across up to 14 external channels - enables synchronized multi-sensor sampling without CPU intervention. |
| Programmable Core LDO | Adjusts VCORE voltage to optimize power vs. performance trade-off - extends battery life in variable-load applications like burst-mode sensing. |
| 3.5-µs Wake-up from LPM3 | Enables rapid response to external interrupts (e.g., sensor trigger) while sustaining sub-2-µA sleep current - critical for duty-cycled IoT nodes. |
| Hardware Multiplier (MPY32) | Executes 32-bit multiply in one cycle - accelerates digital filtering, FFT, and sensor calibration math without consuming CPU cycles. |
Applications
| USB-Enabled Sensor Node | Portable Data Logger |
|---|---|
Use Scenario: A handheld environmental monitor acquires temperature, humidity, and CO₂ via analog sensors and streams timestamped data to a PC via USB. IC Role / Device Role / Timing Role: MSP430F5521IPNR acts as main controller, ADC manager, RTC time-stamper, and USB device - synchronizing sampling, storage, and host communication. Use Value: Integrated USB PHY and 12-bit ADC reduce component count by ≥3 ICs; LPM3 current of 1.9 µA enables >1-year battery life on two AA cells. | Use Scenario: An industrial vibration logger samples accelerometer data at 1 kHz for 72 hours, stores results in internal Flash, then uploads via USB upon retrieval. IC Role / Device Role / Timing Role: MSP430F5521IPNR serves as data acquisition engine, Flash controller, and USB mass-storage device - managing DMA transfers, power-gated sampling, and bulk data transfer. Use Value: 32 KB Flash stores ~1.2 million 12-bit samples; 3.5-µs wake-up ensures precise 1-ms sampling intervals with minimal timing jitter. |
| USB HID Peripheral | Low-Power USB Bridge |
Use Scenario: A medical diagnostic tool uses capacitive touch buttons and analog front-end to detect patient contact, then reports status via USB HID to clinic software. IC Role / Device Role / Timing Role: MSP430F5521IPNR functions as HID report generator, analog threshold detector, and USB enumeration handler - handling button debouncing, signal conditioning, and descriptor responses. Use Value: Built-in comparator and 12-bit ADC enable direct sensor interface; USB suspend/resume support reduces idle power to 1.1 µA (LPM4). | Use Scenario: A legacy RS-232 sensor module connects to modern USB hosts using a compact adapter that converts UART frames to USB CDC ACM packets. IC Role / Device Role / Timing Role: MSP430F5521IPNR operates as UART-to-USB bridge - receiving serial data, buffering in RAM, and transmitting as USB bulk transfers with automatic flow control. Use Value: Dual USCI modules allow concurrent UART RX/TX and USB endpoint management; 6 KB RAM accommodates 4-KB USB receive buffer and protocol overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F5529IPN | 128 KB Flash, 8 KB + 2 KB RAM, same peripherals and pinout - higher memory capacity in identical 80-pin LQFP package. | Preferred for firmware-intensive USB applications (e.g., custom class devices, large configuration tables) where 32 KB Flash is insufficient. | Select MSP430F5529IPN when future firmware expansion or dual-application partitioning (e.g., bootloader + app) is required. |
| MSP430F5525IPN | 64 KB Flash, 4 KB + 2 KB RAM, same 63-I/O count and peripheral set - mid-tier memory option in same 80-pin LQFP package. | Suitable for applications needing more Flash than MSP430F5521IPNR but less than MSP430F5529IPN, such as enhanced sensor fusion with larger filter coefficients. | Choose MSP430F5525IPN when balancing cost and memory headroom for USB-connected industrial sensors with moderate algorithm complexity. |
Compared with MSP430F5529IPN and MSP430F5525IPN, the MSP430F5521IPNR offers the lowest Flash/RAM configuration in the PN-package family while retaining full USB, ADC, and timer functionality - making it optimal for cost-sensitive, memory-efficient USB sensor designs.
Availability
MSP430F5521IPNR is available at Aetrix Electronics and suitable for USB-connected sensor nodes, portable data loggers, and low-power HID peripherals requiring stable component supply and long-term industrial availability.
Supply support for MSP430F5521IPNR 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 MSP430F552x product line is designed for ultra-low-power mixed-signal applications demanding integrated USB connectivity, precision analog measurement, and extended battery life - targeting portable instrumentation and energy-conscious IoT edge devices.
FAQ
What USB speed and device class does the MSP430F5521IPNR support?
The MSP430F5521IPNR supports full-speed USB 2.0 (12 Mbps) with an integrated PHY and USB-PLL. It implements standard USB device classes including CDC ACM (virtual COM port), HID, and MSC via software stack - no external USB controller is required. The MSP430F5521IPNR's eight endpoints and dual-voltage power system enable robust class implementation without external level shifters or regulators.
Does the MSP430F5521IPNR include a hardware real-time clock (RTC)?
Yes, the MSP430F5521IPNR includes a dedicated RTC_A module with calendar mode, alarm interrupt, and 32-kHz crystal support (via P5.4/XIN and P5.5/XOUT). It operates autonomously in LPM3 with 1.9 µA current draw while maintaining full RAM retention - enabling accurate time-stamping and periodic wake-up for sensor sampling without CPU involvement.
How many analog input channels does the 12-bit ADC on the MSP430F5521IPNR support?
The MSP430F5521IPNR's ADC12_A module supports 14 external analog input channels (A0–A13) plus two internal sources (temperature sensor and VREF), for a total of 16 selectable inputs. Channel autoscan allows sequential conversion across all enabled inputs with single-trigger initiation - ideal for multi-sensor systems requiring synchronized acquisition.
What is the minimum supply voltage for active operation of the MSP430F5521IPNR?
The MSP430F5521IPNR operates from 1.8 V to 3.6 V DC. At 1.8 V, it supports full functionality including USB (with external 3.3-V supply routed to VUSB), 12-bit ADC, and 16-bit timers - enabling compatibility with single-cell Li-ion or two-cell alkaline battery systems without boost regulation.
Is the MSP430F5521IPNR pin-compatible with other devices in the MSP430F552x family?
Yes, the MSP430F5521IPNR shares identical 80-pin LQFP (PN) package pinout with MSP430F5529IPN, MSP430F5527IPN, and MSP430F5525IPN - allowing hardware reuse across memory variants. All share the same peripheral mapping, I/O assignment, and power/ground pin locations, enabling drop-in replacement during design iteration or cost optimization.
MSP430F5521IPNR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 80-LQFP
- Series:
- MSP430F5xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPUXV2
- Core Size:
- 16-Bit
- Speed:
- 25MHz
- Connectivity:
- I2C, IrDA, LINbus, SCI, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, PWM, WDT
- Number of I/O:
- 63
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 16x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F5521IPNR FAQ
1.How can I place an order for MSP430F5521IPNR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F5521IPNR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MSP430F5521IPNR reliable?
The price and inventory of MSP430F5521IPNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F5521IPNR is usually 5 days.
3.What payment methods are accepted for MSP430F5521IPNR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F5521IPNR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F5521IPNR?
MSP430F5521IPNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F5521IPNR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MSP430F5521IPNR?
For technical support, including MSP430F5521IPNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F5521IPNR requirements.
6.How does Aetrix verify that MSP430F5521IPNR is sourced from the original manufacturer or authorized distributors?
All MSP430F5521IPNR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MSP430F5521IPNR meets industry standards.
7.What is the process for return or replacement of MSP430F5521IPNR?
All MSP430F5521IPNR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F5521IPNR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MSP430F5521IPNR part is unused and in its original packaging.
Return procedure for MSP430F5521IPNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MSP430F5521IPNR Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
