My Inquiry
My Account
Infineon Technologies CY8C4126LCE-HV403
- Part No.:
- CY8C4126LCE-HV403
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
CY8C4126LCE-HV403.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 32VFQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,086
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CY8C4126LCE-HV403 from Infineon is a 32-bit Arm® Cortex®-M0+ MCU with integrated high-voltage precision analog subsystem, AEC-Q100 qualified for automotive lead-acid battery monitoring. It delivers 48-MHz CPU operation, dual 16–20+ bit ΔΣ ADCs (current/voltage/temperature/diagnostic), integrated LIN transceiver, and operates directly from 12-V/24-V battery rails up to 42 V.
For engineers reviewing the CY8C4126LCE-HV403 datasheet, CY8C4126LCE-HV403 pinout, CY8C4126LCE-HV403 application, or CY8C4126LCE-HV403 equivalent, key selection criteria include HV battery input tolerance (42 V), ASIL B hardware compliance per ISO 26262, dual-channel precision ΔΣ ADC architecture, LIN 2.2A/SAE J2602 protocol support, and on-chip ECC-protected 128 KB flash + 8 KB SRAM.
Technical Context
The device implements a dedicated high-voltage analog front-end with two independent ΔΣ ADCs: one current channel featuring automatic gain control and one voltage channel with integrated HV input divider (42 V tolerant). Its LIN subsystem includes both a full LIN PHY block (dual-channel) and an SCB configurable as LIN slave, enabling concurrent master/slave roles in battery management topologies.
Functional safety is architected at silicon level: SECDED ECC protects all safety-critical memories (flash, SRAM), MPU enforces memory isolation, windowed WDT uses challenge-response, and analog diagnostics include redundant voltage/current/temperature paths plus backup reference validation - all aligned to ISO 26262 ASIL B hardware metrics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+, 48 MHz max - enables real-time battery state estimation with deterministic interrupt latency. |
| Flash Memory | 128 KB code flash + 8 KB data flash, both with ECC - ensures firmware integrity and parameter retention in automotive environments. |
| ADC Resolution | Dual ΔΣ ADCs: 16–20+ bits effective - supports high-accuracy SOC/SOH calculation across temperature and aging conditions. |
| HV Input Tolerance | 42 V absolute max on voltage channel - allows direct connection to 12-V/24-V lead-acid battery without external protection circuitry. |
| LIN Compliance | LIN 2.2A, 2.1, 2.0, 1.3, SAE J2602, ISO 17987 - interoperable with legacy and next-gen automotive body electronics networks. |
| Safety Certification | AEC-Q100 Grade 1, ISO 26262 ASIL B hardware metrics - meets functional safety requirements for battery monitoring in ASIL-B systems. |
| Package | 32-QFN (6 × 6 mm) with wettable flanks - supports automated optical inspection (AOI) and reliable reflow in automotive PCB assembly. |
Pinout & Package
32-QFN package (6 × 6 mm) with wettable flanks, optimized for automotive thermal and mechanical reliability. Pin count: 9 GPIOs plus dedicated HV analog inputs, LIN TX/RX, SWD debug, power, and reset terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O supply rail | 3.3-V tolerant I/O domain supporting LIN transceiver and GPIO logic levels. |
| VDDD | Digital core supply | 1.8-V regulated supply for CPU, memory, and digital peripherals; monitored for brownout detection. |
| VDDA | Analog supply | 3.3-V analog domain powering ΔΣ ADCs and precision references; isolated for noise immunity. |
| VREFH/VREFL | ADC reference inputs | External reference pair enabling ratiometric measurement stability across temperature and supply variation. |
| VBAT_HV | High-voltage battery input | 42-V tolerant analog input connected to internal HV divider for direct battery voltage sensing. |
| ILIN_TX / ILIN_RX | LIN physical layer I/O | Dedicated LIN PHY pins compliant with ISO 17987-4; support bus wake-up and sleep mode transitions. |
| SWDCLK / SWDIO | Debug interface | 2-pin Serial Wire Debug interface for programming, calibration, and runtime diagnostics in production and field service. |
Key Features
| Feature | Design Value |
|---|---|
| Dual ΔΣ ADC with sequencer | Independent acquisition of current, voltage, temperature, and diagnostic channels with programmable timing and digital filtering - eliminates need for external multiplexing or post-processing. |
| Integrated LIN PHY + SCB-LIN | Hardware LIN 2.2A transceiver plus software-configurable SCB in LIN slave mode - enables dual-network participation (e.g., master on main LIN, slave on sub-bus). |
| ASIL B-compliant safety mechanisms | MPU, windowed WDT, supply monitors, and SECDED ECC on all safety-critical memories - satisfies hardware-level requirements for ISO 26262 ASIL B without external safety monitor IC. |
| HV analog input divider | On-die resistor network scaling 0–42 V battery voltage to 0–3.3 V ADC range - removes external HV resistive divider and associated calibration drift. |
| Auto-gain current channel | Programmable PGA and gain-switching logic adapting to shunt voltage range (±50 mV to ±200 mV) - maintains 16+ bit ENOB across charge/discharge current profiles. |
Applications
| Battery Management Unit (BMU) | Start-Stop System Controller |
|---|---|
Use Scenario: Monitoring 12-V lead-acid battery health in premium vehicles with frequent engine cycling and accessory loads. IC Role / Device Role / Timing Role: Primary system-on-chip performing real-time voltage/current/temperature acquisition, SOC/SOH estimation, and LIN-based reporting to ECU. Use Value: Eliminates discrete ADC, LIN transceiver, and voltage supervisor ICs - reduces BOM count by ≥4 components while maintaining ASIL B compliance. | Use Scenario: Controlling battery charging/discharging during engine cranking and idle-stop events in 12-V micro-hybrid architectures. IC Role / Device Role / Timing Role: High-voltage analog acquisition node with fast wakeup (<10 µs) from DeepSleep mode to capture transient cranking voltage sag. Use Value: On-chip 42-V tolerant HV input and ultra-low-power DeepSleep mode enable accurate cranking event capture without external HV protection or wake-up circuitry. |
| Commercial Vehicle Battery Monitor | Aftermarket Battery Tester |
Use Scenario: Deployed in Class 8 truck battery monitoring systems operating across -40°C to +105°C ambient with wide battery voltage swings. IC Role / Device Role / Timing Role: AEC-Q100 qualified analog front-end and LIN communication hub interfacing with fleet telematics modules. Use Value: Dual ΔΣ ADCs with internal temperature sensing and LIN 2.2A compliance ensure reliable diagnostics over extended temperature and vibration stress. | Use Scenario: Handheld battery diagnostic tool requiring portable operation, high-accuracy voltage/current measurement, and USB-to-LIN bridging. IC Role / Device Role / Timing Role: Standalone measurement SoC with integrated LIN PHY and configurable SCB for PC host communication via USB-CDC emulation. Use Value: Single-chip solution replaces multi-IC test head design - enables compact form factor and factory-calibrated accuracy traceable to internal references. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage battery monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17205 | Dedicated fuel gauge IC with ModelGauge™ m5 algorithm; no MCU or LIN; 16-bit ADC only; 32-V max input. | Targeted at portable Li-ion packs; lacks automotive qualification, HV tolerance, and LIN interface. | Select when precise SOC modeling for Li-ion is primary need and LIN connectivity is handled externally. |
| ADuCM4050 | ARM Cortex-M4F MCU with 12-bit SAR ADC, no integrated LIN PHY, 28-V abs max rating, no AEC-Q100 qualification. | General-purpose industrial sensor node; requires external LIN transceiver and HV signal conditioning. | Select when floating-point computation and flexible peripheral routing outweigh automotive certification and HV integration needs. |
Compared with MAX17205 and ADuCM4050, CY8C4126LCE-HV403 uniquely integrates AEC-Q100 qualification, 42-V HV analog input, dual high-resolution ΔΣ ADCs, and dual LIN capability (PHY + SCB) in a single die - reducing system complexity and validation effort for automotive 12-V battery monitoring.
Availability
CY8C4126LCE-HV403 is available at Aetrix Electronics and suitable for automotive battery management units, start-stop system controllers, commercial vehicle battery monitors, and aftermarket battery testers requiring stable component supply under extended temperature and voltage stress.
Supply support for CY8C4126LCE-HV403 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
Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive electronics, and security solutions, with global R&D and manufacturing infrastructure.
CY8C4126LCE-HV403 belongs to the PSoC™ 4 HVPA-144K product line, engineered specifically for high-voltage, safety-critical lead-acid battery monitoring in automotive applications - integrating precision analog, LIN, and functional safety features into a single programmable SoC.
FAQ
What is the maximum battery voltage the CY8C4126LCE-HV403 can measure directly?
The device supports direct measurement of battery voltages up to 42 V absolute maximum on its VBAT_HV pin, enabled by an integrated high-voltage resistor divider. This allows connection to 12-V and 24-V lead-acid systems without external voltage scaling components, and is validated per the absolute maximum ratings table in Rev. *K datasheet (Section 4.1).
Does CY8C4126LCE-HV403 support both LIN master and slave operation simultaneously?
Yes - it implements two independent LIN interfaces: a dedicated LIN PHY block (supporting master or slave operation) and a reconfigurable SCB that can operate as a LIN slave. This enables concurrent master-mode communication on the main vehicle LIN bus and slave-mode response on a secondary sub-bus, as confirmed in Section 1.4 and 1.5.4 of the datasheet.
How is functional safety implemented in hardware for ISO 26262 compliance?
Hardware safety features include SECDED ECC on flash and SRAM, a memory protection unit (MPU), windowed watchdog timer with challenge-response, supply monitors for overvoltage/brownout on 1.8-V and 3.3-V rails, and redundant analog measurement paths with backup reference validation - all documented in Section 1.2.2 and 1.7 of the datasheet as meeting ISO 26262 ASIL B hardware architectural metrics.
Can the dual ΔΣ ADCs acquire voltage and current data synchronously?
Yes - the Precision Analog Channel Subsystem (PACSS) includes a hardware sequencer that coordinates sampling across both ΔΣ ADCs with programmable timing alignment. This enables synchronized voltage and current capture for accurate instantaneous power calculation, as specified in Section 1.7.1 and 1.8.1 of the datasheet.
CY8C4126LCE-HV403 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 32-VFQFN Exposed Pad
- Series:
- PSOC™ 4 HV PA
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit
- Speed:
- 24.576MHz
- Connectivity:
- I2C, IrDA, LINbus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, PWM, Temp Sensor, WDT
- Number of I/O:
- 9
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 8K x 8
- RAM Size:
- 4K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 3.6V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
CY8C4126LCE-HV403 FAQ
1.How can I place an order for CY8C4126LCE-HV403 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4126LCE-HV403 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 CY8C4126LCE-HV403 reliable?
The price and inventory of CY8C4126LCE-HV403 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4126LCE-HV403 is usually 5 days.
3.What payment methods are accepted for CY8C4126LCE-HV403?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4126LCE-HV403 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4126LCE-HV403?
CY8C4126LCE-HV403 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4126LCE-HV403 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 CY8C4126LCE-HV403?
For technical support, including CY8C4126LCE-HV403 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4126LCE-HV403 requirements.
6.How does Aetrix verify that CY8C4126LCE-HV403 is sourced from the original manufacturer or authorized distributors?
All CY8C4126LCE-HV403 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 CY8C4126LCE-HV403 meets industry standards.
7.What is the process for return or replacement of CY8C4126LCE-HV403?
All CY8C4126LCE-HV403 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4126LCE-HV403, 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 CY8C4126LCE-HV403 part is unused and in its original packaging.
Return procedure for CY8C4126LCE-HV403:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY8C4126LCE-HV403 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
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…
Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…
Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …
Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.
Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…
