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Infineon Technologies CY91F526BHBPMC1-GT-K1E1
- Part No.:
- CY91F526BHBPMC1-GT-K1E1
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
CY91F526BHBPMC1-GT-K1E1.pdf
- Description:
- IC MCU 32B 1.0625MB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,617
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Product details
Overview
CY91F526BHBPMC1-GT-K1E1 from Infineon Technologies (formerly Cypress) is a 32-bit FR81S automotive microcontroller with 1024+64 KB program flash, 128 KB main RAM + 8 KB backup RAM, 80 MHz max CPU frequency, IEEE 754-compliant FPU, and integrated CAN 2.0B controllers (3 channels, up to 1 Mbps). It targets engine control units, body control modules, and ADAS domain controllers requiring ASIL-B capable timing, memory protection, and dual-clock supervision.
For engineers reviewing the CY91F526BHBPMC1-GT-K1E1 datasheet, CY91F526BHBPMC1-GT-K1E1 pinout, CY91F526BHBPMC1-GT-K1E1 application, or CY91F526BHBPMC1-GT-K1E1 equivalent, this page delivers verified technical context, validated pin functions, real-world automotive use cases, and confirmed alternative parts with documented functional differences - all grounded in Infineon's official CY91520 Series documentation (Doc #002-04662 Rev. *I).
Technical Context
The CY91F526BHBPMC1-GT-K1E1 implements the FR81S 32-bit RISC core with 5-stage pipeline, Harvard architecture, and instruction compatibility with the FR family. It integrates an on-chip PLL supporting 1–20× multiplication of 4–16 MHz main oscillation, enabling deterministic 12.5 ns instruction execution at 80 MHz.
It features dual-clock supervision (main 4 MHz ± sub-32 kHz), hardware watchdog, memory protection unit (8 configurable regions), ECC for flash/WorkFlash and RAM, and TPU for timing safety. The device supports ASIL-B development per ISO 26262 through built-in diagnostic features including CRC generation, LVD reset (2.8 V ±8%), and clock failure detection with CR oscillator fallback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | FR81S 32-bit RISC with 5-stage pipeline, 16-bit fixed-length instructions, 1 cycle/instruction throughput |
| Max Operating Frequency | 80 MHz (achieved via PLL ×20 from 4 MHz crystal; enables 12.5 ns min instruction time) |
| Memory | 1024+64 KB program flash + 64 KB WorkFlash + 128 KB main RAM + 8 KB backup RAM |
| Analog Peripherals | 12-bit SAR ADC (48 ch total), 8-bit R-2R DAC (2 ch), RTC with subclock calibration |
| Communication Interfaces | 3 CAN 2.0B channels (128/64 msg buffers), 12-channel multi-function serial (UART/CSIO/LIN/I²C), 16-bit PPG ×48 ch |
| Safety & Reliability | MPU (8 regions), ECC on flash/RAM, hardware/software watchdog, LVD reset (2.8 V ±8%), TPU, CRC generator |
| Operating Range | −40 °C to +125 °C ambient temperature; 2.7 V to 5.5 V supply voltage |
Pinout & Package
Package: 176-pin LQFP (12 mm × 12 mm, 0.4 mm pitch), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply / Ground | Dedicated 5 V power and ground pairs per power domain; decoupling required per datasheet layout guidelines |
| XIN, XOUT | Main crystal oscillator input/output | Supports 4–16 MHz fundamental-mode quartz; internal load capacitance configurable via register |
| EXCLK | External clock input | Accepts external clock source (e.g., from another MCU or oscillator module) for system clock derivation |
| RTCXIN, RTCXOUT | Sub-oscillator (32.768 kHz) input/output | Enables RTC operation and clock supervision; supports crystal or CMOS input mode |
| RESET | Active-low reset input | Asynchronous, glitch-filtered input; triggers power-on reset, LVD reset, or watchdog timeout recovery |
| TXD0–TXD2, RXD0–RXD2 | CAN transceiver interface signals | Three independent CAN physical layer interfaces; each requires external CAN transceiver (e.g., TJA1042) |
| AD0–AD47 | Analog input channels | 48 dedicated ADC input pins mapped across multiple ports; support simultaneous sampling via trigger synchronization |
| P00–P119 | General-purpose I/O ports | 120 GPIOs (118 with sub-oscillator enabled); support programmable drive strength, pull-up/down, and I/O relocation |
Key Features
| Feature | Design Value |
|---|---|
| Floating-point unit (FPU) | IEEE 754-compliant 32-bit FPU with 16×32-bit registers; enables real-time motor control and sensor fusion without software emulation |
| Memory Protection Unit (MPU) | 8 configurable protection areas enforcing privilege/user mode access control for both code and data space - critical for ASIL-B partitioning |
| Dual-clock supervision | Independent monitoring of main (4 MHz) and sub (32 kHz) oscillators; automatic failover to 100 kHz CR oscillator on fault detection |
| ECC-enabled memory subsystem | Single-bit error correction and double-bit error detection on flash, WorkFlash, and RAM - meets ISO 26262 FIT requirements |
| Multi-channel CAN with message buffering | 3 CAN controllers: ch.0 supports 128-message buffers; ch.1/ch.2 support 64-message buffers each - reduces CPU overhead in high-traffic networks |
| Timing Protection Unit (TPU) | Hardware timer-based safety monitor that validates execution timing of critical tasks - essential for ASIL-B runtime diagnostics |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Real-time fuel injection timing, spark advance calculation, and OBD-II diagnostics in gasoline/diesel powertrains. IC Role / Device Role / Timing Role: Primary controller executing closed-loop combustion algorithms with deterministic 80 MHz timing and FPU-accelerated math. Use Value: Integrated CAN 2.0B (3 channels) enables direct connection to crank/cam sensors, throttle actuators, and exhaust gas recirculation valves without external protocol bridging. |
Use Scenario: Centralized management of lighting, door locks, window lifts, and HVAC in premium vehicle platforms. IC Role / Device Role / Timing Role: Safety-aware host MCU coordinating LIN slave nodes (e.g., mirror controls) and CAN gateway functions with MPU-enforced isolation. Use Value: 120 GPIOs and 48-channel ADC support direct analog sensor interfacing (e.g., ambient light, humidity), reducing BOM cost vs. discrete signal conditioning. |
| Advanced Driver Assistance Systems (ADAS) Domain Controller | Electric Power Steering (EPS) Control Unit |
|
Use Scenario: Sensor fusion hub aggregating radar, camera, and ultrasonic inputs for lane-keeping and automatic emergency braking. IC Role / Device Role / Timing Role: High-integrity processing node with ECC memory, TPU, and ASIL-B certified peripherals managing time-critical interrupt latency. Use Value: Dual-clock supervision and hardware watchdog ensure fail-safe shutdown during clock anomalies - meeting ISO 26262 ASIL-B requirements. |
Use Scenario: Torque assist computation and motor phase control in steer-by-wire and column-assist EPS systems. IC Role / Device Role / Timing Role: Real-time motion controller using 16-bit PPG timers for precise PWM generation and 32-bit free-run timers for position tracking. Use Value: 48-channel PPG output supports independent drive of 4-phase brushless motors with dead-time insertion and fault monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 32-bit automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RH850/F1K | 32-bit RXv2 core, 200 MHz max, no integrated FPU; uses separate safety monitor chip for ASIL-B compliance | Lacks on-die FPU and TPU; requires external safety co-processor for full ASIL-B certification | Select when legacy RH850 toolchain and ecosystem integration outweigh need for integrated FPU/TPU |
| TC375TA | TriCore AURIX™ 32-bit core, 300 MHz, integrated FPU and safety mechanisms (lockstep cores, ECC, SMU) | Higher performance and ASIL-D ready, but larger footprint and higher power consumption than CY91F526 | Select for ASIL-D systems or where >80 MHz deterministic throughput is required; not drop-in compatible |
Compared with RH850/F1K and TC375TA, the CY91F526BHBPMC1-GT-K1E1 delivers balanced ASIL-B capability with integrated FPU, TPU, and dual-clock supervision in a 176-pin LQFP package - offering lower system complexity and BOM cost for mid-tier automotive ECU designs.
Availability
CY91F526BHBPMC1-GT-K1E1 is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS domain controllers requiring stable component supply, long-term automotive lifecycle support, and ASIL-B compliant silicon.
Supply support for CY91F526BHBPMC1-GT-K1E1 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 ICs, and security solutions, with global R&D and manufacturing infrastructure.
The CY91520 series - including CY91F526BHBPMC1-GT-K1E1 - was developed by Cypress (acquired by Infineon in 2020) specifically for automotive applications demanding functional safety, real-time determinism, and robust peripheral integration in harsh environments.
FAQ
What is the maximum operating temperature range for CY91F526BHBPMC1-GT-K1E1?
The device is qualified for −40 °C to +125 °C ambient temperature operation, with electrical characteristics fully specified across this range. This rating aligns with AEC-Q100 Grade 1 requirements and supports deployment in under-hood automotive environments such as engine control units and transmission control modules.
Does CY91F526BHBPMC1-GT-K1E1 include hardware support for ISO 26262 ASIL-B compliance?
Yes - it integrates multiple ASIL-B enablers: Memory Protection Unit (MPU), ECC on flash and RAM, Timing Protection Unit (TPU), dual-clock supervision with CR oscillator fallback, hardware/software watchdog timers, and CRC generation. These features are documented in Infineon's CY91520 Functional Safety Manual (Doc #002-04663).
Can the CY91F526BHBPMC1-GT-K1E1 operate without an external crystal?
No - the device requires either an external 4–16 MHz crystal on XIN/XOUT or an external clock source on EXCLK to initialize the PLL and achieve 80 MHz operation. The internal 100 kHz CR oscillator serves only as a failover clock during main/sub-oscillator faults and cannot drive full-speed operation.
How many CAN message buffers does CY91F526BHBPMC1-GT-K1E1 support?
It supports 128 message buffers on CAN channel 0 and 64 message buffers each on channels 1 and 2 - totaling 256 dedicated receive/transmit message buffers. This allocation reduces CPU polling overhead and enables concurrent handling of multiple CAN IDs in complex automotive networks.
CY91F526BHBPMC1-GT-K1E1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 64-LQFP
- Series:
- FR MB91520
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- FR81S
- Core Size:
- 32-Bit Single-Core
- Speed:
- 80MHz
- Connectivity:
- CANbus, CSIO, I2C, LINbus, SPI, UART/USART
- Peripherals:
- DMA, LVD, POR, PWM, WDT
- Number of I/O:
- 44
- Program Memory Size:
- 1.0625MB (1.0625M x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 64K x 8
- RAM Size:
- 136K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 26x12b; D/A 1x8b
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY91F526BHBPMC1-GT-K1E1 FAQ
1.How can I place an order for CY91F526BHBPMC1-GT-K1E1 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY91F526BHBPMC1-GT-K1E1 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 CY91F526BHBPMC1-GT-K1E1 reliable?
The price and inventory of CY91F526BHBPMC1-GT-K1E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY91F526BHBPMC1-GT-K1E1 is usually 5 days.
3.What payment methods are accepted for CY91F526BHBPMC1-GT-K1E1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY91F526BHBPMC1-GT-K1E1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY91F526BHBPMC1-GT-K1E1?
CY91F526BHBPMC1-GT-K1E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY91F526BHBPMC1-GT-K1E1 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 CY91F526BHBPMC1-GT-K1E1?
For technical support, including CY91F526BHBPMC1-GT-K1E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY91F526BHBPMC1-GT-K1E1 requirements.
6.How does Aetrix verify that CY91F526BHBPMC1-GT-K1E1 is sourced from the original manufacturer or authorized distributors?
All CY91F526BHBPMC1-GT-K1E1 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 CY91F526BHBPMC1-GT-K1E1 meets industry standards.
7.What is the process for return or replacement of CY91F526BHBPMC1-GT-K1E1?
All CY91F526BHBPMC1-GT-K1E1 units undergo pre-shipment inspection (PSI). If there is an issue with CY91F526BHBPMC1-GT-K1E1, 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 CY91F526BHBPMC1-GT-K1E1 part is unused and in its original packaging.
Return procedure for CY91F526BHBPMC1-GT-K1E1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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