My Inquiry
My Account
NXP Semiconductors MFS8621BMBA0ESR2
- Part No.:
- MFS8621BMBA0ESR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Management - Specialized
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
MFS8621BMBA0ESR2.pdf
- Description:
- SAFETY SYSTEM BASIS CHIP FOR DOM
- Quantity:
- Payment:
- Shipping:
Inventory:1,842
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MFS8621BMBA0ES from NXP Semiconductors is a fail-safe system basis chip (SBC) designed for automotive domain controllers requiring functional safety up to ASIL B. It integrates a 15 A high-voltage buck controller (VPRE), 1 A boost converter (BOOST), 2.5 A low-voltage buck (BUCK), two 400 mA LDOs, and 10-channel ±1 % accurate voltage monitoring. It serves as the central power management and safety supervisor in ADAS radar systems with 12 V battery network compatibility.
For engineers reviewing the MFS8621BMBA0ES datasheet, MFS8621BMBA0ES pinout, MFS8621BMBA0ES application, or MFS8621BMBA0ES equivalent, this page delivers verified specifications, safety-critical pin functions, automotive-grade thermal and ESD ratings, and validated alternatives for domain controller power architecture design.
Technical Context
The MFS8621BMBA0ES implements a leader/follower power-up sequencing architecture via XFAILB, enabling synchronized startup with cascaded NXP PMICs in BYLink platform designs. Its fail-safe state machine independently monitors ten voltage rails-including external PMIC outputs-using dedicated analog multiplexer (AMUX) and dual monitoring paths (DAC- and resistor-based).
It supports 32-bit I²C configuration with 8-bit CRC, integrates LBIST/ABIST for ISO 26262-compliant self-test, and provides hardware-level MCU failure detection via dual FCCU inputs and ERRMON interface. The device operates across −40 °C to 125 °C and meets AEC-Q100 Grade 1 qualification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 36 V max for 12 V battery networks - enables direct connection to automotive 12 V systems with reverse-battery protection diodes on VSUP1/VSUP2. |
| VPRE Output Capability | Configurable 3.3–5.0 V, up to 15 A DC - drives high-power MCUs or SoCs using external FETs with e-fuse shutdown for overcurrent protection. |
| BOOST Output | 5–6 V, up to 1 A DC - powers CAN transceivers or sensors requiring regulated 5 V supply independent of main rail. |
| BUCK Output | 1.0–3.3 V, up to 2.5 A DC - supplies core voltage to automotive MCUs with integrated synchronous rectification. |
| LDO1/LDO2 Current | Each delivers up to 400 mA - supports I/O domains, peripherals, and failsafe logic with load-switch capability on LDO1. |
| Voltage Monitoring Accuracy | ±1 % across 10 inputs - ensures QM rail supervision from non-NXP components meets ASIL B diagnostic coverage requirements. |
| Functional Safety | ASIL B compliant per ISO 26262 - includes dedicated watchdog (simple mode), latent fault detection on PGOOD/RSTB/FS0B, and logical/analog BIST. |
Pinout & Package
Package: HPQFN48eP (48-pin wettable flank QFN with exposed pad), optimized for thermal dissipation in automotive under-hood environments (RθJA = 23 °C/W at 2s6p layout).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSUP1 / VSUP2 | Main power input | Dual 36 V-rated inputs require external reverse-battery diodes; enable redundancy or split-supply operation in safety-critical systems. |
| VPRE-related pins (PRE_SW, PRE_GHS, PRE_GLS, PRE_FB) | High-voltage buck controller interface | Drive external N-channel MOSFETs; support current sensing (PRE_CSP/PRE_CSN), feedback (PRE_FB), and bootstrap (PRE_BOOT) for 15 A output. |
| PGOOD / RSTB / FS0B | Fail-safe outputs | Open-drain active-low signals with latent fault detection - directly reset MCU (RSTB), enable downstream power (PGOOD), or assert safe state (FS0B). |
| VMON0_I2C to VMON9_RES | Voltage monitoring inputs | 10 dedicated analog inputs supporting both DAC-based (VMON1–3_DAC) and resistor-bridge (VMON4–9_RES) monitoring schemes for mixed-rail supervision. |
| XFAILB | Power synchronization I/O | Enables leader/follower sequencing with other NXP SBCs in BYLink platform - eliminates need for external timing coordination logic. |
Key Features
| Feature | Design Value |
|---|---|
| BYLink synchronization | Enables cascaded SBCs to behave as one power domain with coordinated sequencing and safety state propagation - reduces system-level timing margining effort. |
| e-Fuse protected VPRE | Shuts down 15 A high-voltage rail within microseconds during overcurrent events - prevents damage to external FETs and downstream loads without relying on MCU intervention. |
| 10-channel ±1 % voltage monitor | Supervises internal regulators and external PMIC rails simultaneously - satisfies ASIL B diagnostic coverage for QM supplies in heterogeneous power architectures. |
| I²C with 8-bit CRC | Ensures robust configuration and status reporting in noisy automotive environments - prevents register corruption during firmware updates or runtime parameter changes. |
| Integrated ABIST/LBIST | Performs analog and logic self-tests at power-on and during runtime - fulfills ISO 26262 requirement for systematic fault detection without external test equipment. |
Applications
| Radar Domain Controller | ADAS Camera ECU |
|---|---|
Use Scenario: Powers and supervises multi-core radar SoC (e.g., NXP S32R) in 77 GHz imaging radar modules operating on 12 V vehicle battery. IC Role / Device Role / Timing Role: Central SBC providing sequenced VPRE (5 V/10 A), BOOST (5.5 V/0.8 A), BUCK (1.2 V/2.2 A), and LDOs while monitoring all rails and asserting FS0B on fault. Use Value: Enables single-chip power + safety solution meeting ASIL B requirements without discrete supervisors or sequencers - reduces BOM count by ≥4 components. |
Use Scenario: Supplies stereo camera ECU with dual image sensors, ISP, and safety-monitoring MCU in forward collision warning system. IC Role / Device Role / Timing Role: Delivers isolated 3.3 V (LDO1), 1.8 V (LDO2), and 1.1 V (BUCK) with precise sequencing; monitors sensor bias rails via VMONx_RES inputs. Use Value: Achieves ±1 % rail tolerance across temperature for pixel data integrity while integrating wake-up detection (WAKE1/WAKE2) for low-power vision processing modes. |
| Electric Power Steering (EPS) MCU | Vehicle Gateway Module |
Use Scenario: Manages power for torque-assist MCU and motor driver interface in ASIL C EPS system with ASIL B decomposition. IC Role / Device Role / Timing Role: Provides fail-safe reset (RSTB), power-good signaling (PGOOD), and voltage supervision for MCU core, I/O, and CAN PHY supplies. Use Value: Supports diagnostic coverage targets for ISO 26262 Part 5 through independent monitoring paths and built-in self-test - eliminates need for external watchdog IC. |
Use Scenario: Powers multi-protocol gateway (CAN FD, LIN, Ethernet) in zonal architecture with centralized domain control. IC Role / Device Role / Timing Role: Supplies 3.3 V (LDO1) to microcontroller, 5 V (BOOST) to CAN transceivers, and 1.2 V (BUCK) to Ethernet PHY; synchronizes startup with zone SBCs via XFAILB. Use Value: Enables deterministic power-up across distributed ECUs using BYLink - reduces system boot time variance from >100 ms to <15 ms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fail-safe SBC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MFS8623BMBA0ES | Includes ERRMON input and FIN pin (vs. VMON9_RES on MFS8621BMBA0ES); same 36 V rating and ASIL B compliance. | Required when external IC error monitoring (e.g., for companion PMIC fault reporting) or frequency synchronization is needed. | Select MFS8623BMBA0ES if ERRMON-driven system-level fault escalation or clock domain alignment is part of safety concept. |
| MFS8633BMBA0ES | ASIL D qualified; adds challenger watchdog mode and enhanced diagnostic coverage vs. ASIL B-only MFS8621BMBA0ES. | Suitable for higher-integrity domains like brake-by-wire or steering where ASIL D decomposition applies. | Choose MFS8633BMBA0ES only when full ASIL D compliance is mandated - not a drop-in replacement due to OTP and safety library differences. |
Compared with MFS8621BMBA0ES, MFS8623BMBA0ES adds ERRMON/FIN functionality without changing safety level, while MFS8633BMBA0ES upgrades to ASIL D with expanded watchdog and diagnostics - both require OTP reconfiguration and are not pin-compatible replacements.
Availability
MFS8621BMBA0ES is available at Aetrix Electronics and suitable for automotive domain controllers, radar ECUs, ADAS camera modules, and electric power steering systems requiring stable component supply across extended temperature and safety-critical operation.
Supply support for MFS8621BMBA0ES 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
NXP Semiconductors is a global semiconductor company specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with leadership in automotive processors and safety-certified power management.
The FS86 family - including MFS8621BMBA0ES - was developed to unify power, safety, and scalability in next-generation automotive domain controllers, targeting ADAS, electrification, and zonal E/E architectures compliant with ISO 26262.
FAQ
What is the maximum input voltage rating for MFS8621BMBA0ES?
MFS8621BMBA0ES is rated for 36 V maximum DC input voltage on VSUP1 and VSUP2 pins, making it suitable for 12 V battery network automotive applications. This rating includes transient tolerance per AEC-Q100, and external reverse-battery protection diodes are mandatory on both supply inputs.
Does MFS8621BMBA0ES support ASIL D compliance?
No, MFS8621BMBA0ES is qualified for ASIL B functional safety per ISO 26262. For ASIL D applications, NXP offers MFS8633BMBA0ES - a distinct part with enhanced diagnostics, challenger watchdog mode, and different OTP configuration. MFS8621BMBA0ES cannot be upgraded to ASIL D via software or configuration.
How many voltage rails can MFS8621BMBA0ES monitor simultaneously?
MFS8621BMBA0ES supports monitoring of up to 10 voltage rails with ±1 % accuracy. Inputs include VMON0_I2C (for FIN/AMUX/I²C supply), VMON1–3_DAC (DAC-based), and VMON4–9_RES (resistor-bridge), allowing supervision of internal regulators and external PMIC outputs in mixed-vendor systems.
What package type does MFS8621BMBA0ES use and why is it suited for automotive use?
MFS8621BMBA0ES uses the HPQFN48eP package - a 48-pin wettable flank QFN with exposed thermal pad. Its design achieves RθJA = 23 °C/W (2s6p) and RθJC_BOT = 1 °C/W, enabling reliable operation at junction temperatures up to 150 °C in under-hood environments per AEC-Q100 Grade 1 requirements.
Can MFS8621BMBA0ES be used in 24 V battery network systems?
No, MFS8621BMBA0ES is specifically configured for 12 V battery networks with 36 V maximum input rating. For 24 V systems (60 V max), NXP offers MFS8613BMBA0ES or MFS8603BMBA0ES variants - these differ in silicon revision, OTP code, and voltage rating and are not interchangeable with MFS8621BMBA0ES.
MFS8621BMBA0ESR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Camera
- Current - Supply:
- -
- Voltage - Supply:
- 36V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 48-HVQFN (7x7)
MFS8621BMBA0ESR2 FAQ
1.How can I place an order for MFS8621BMBA0ESR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MFS8621BMBA0ESR2 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 MFS8621BMBA0ESR2 reliable?
The price and inventory of MFS8621BMBA0ESR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MFS8621BMBA0ESR2 is usually 5 days.
3.What payment methods are accepted for MFS8621BMBA0ESR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MFS8621BMBA0ESR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MFS8621BMBA0ESR2?
MFS8621BMBA0ESR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MFS8621BMBA0ESR2 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 MFS8621BMBA0ESR2?
For technical support, including MFS8621BMBA0ESR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MFS8621BMBA0ESR2 requirements.
6.How does Aetrix verify that MFS8621BMBA0ESR2 is sourced from the original manufacturer or authorized distributors?
All MFS8621BMBA0ESR2 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 MFS8621BMBA0ESR2 meets industry standards.
7.What is the process for return or replacement of MFS8621BMBA0ESR2?
All MFS8621BMBA0ESR2 units undergo pre-shipment inspection (PSI). If there is an issue with MFS8621BMBA0ESR2, 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 MFS8621BMBA0ESR2 part is unused and in its original packaging.
Return procedure for MFS8621BMBA0ESR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MFS8621BMBA0ESR2 Tags
-
TPS2511DGNR
Texas Instruments
-
UTC2000/MG
Microchip Technology
-
TUSB320HAIRWBR
Texas Instruments
-
TPS61252DSGR
Texas Instruments
-
PI5USB30216CXUAEX
Diodes Incorporated
-
SN6501DBVR
Texas Instruments
-
CYPD3177-24LQXQT
Infineon Technologies
-
SN6501QDBVRQ1
Texas Instruments
-
STUSB1600AQTR
STMicroelectronics
-
SN6505BDBVR
Texas Instruments
-
SN6501DBVT
Texas Instruments
-
TPS65150PWPR
Texas Instruments
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…
