CY91F526JSE - 32-bit FR81S 80MHz MCU, 1.0625MB Flash | Infineon
Référence : CY91F526JSE ✓ ActifCY91F526JSE Présentation
An automotive-grade microcontroller (MCU) is a programmable logic controller optimized for vehicle electronics, characterized by an operating temperature range typically spanning -40 C to +125 C, enhanced ESD/EMC robustness, and conformance to AEC-Q100 qualification. Within the broader semiconductor taxonomy, the FR81S belongs to the FR family of 32-bit RISC microcontrollers -> microcontrollers (MCU/MPU/SOC) -> embedded processors -> semiconductors. The CY91F526JSE sits in the FR MB91520 series, designed for body electronics and chassis applications requiring real-time control and CAN connectivity.
Key differentiating features include 1.0625 MB Flash (1.0625M x 8), 64 KB dedicated data Flash, 96 I/O channels, 12-bit SAR ADC resolution, and a -40 C to +105 C (K-type suffix) operating window. The wide 2.7-5.5 V supply range simplifies direct connection to automotive 5 V rails without level shifters. Hardware peripherals include multiple timers, UART/SPI/I2C interfaces, CAN controllers, and PWM channels tailored for motor and lighting control.
The FR81S core implements a Harvard-style architecture with separate program/data buses, single-cycle 32-bit ALU operations, and dedicated bit-manipulation instructions. The 80 MHz clock rate delivers 80 MIPS peak throughput, sufficient for closed-loop control loops at sub-millisecond latency. Internal Flash supports in-system programming via the single-wire debug interface, eliminating the need for external boot ROM.
Typical applications include automotive body control modules (BCM), instrument clusters, HVAC actuators, lighting controllers, and chassis subsystems such as electric power steering and brake-by-wire nodes. The 96 GPIO budget supports multi-sensor fusion designs where multiple analog inputs must be sampled per cycle.
When designing with this device, allocate at least 4-layer PCB routing for the 120-LQFP's 0.5 mm pitch footprint. Provide a local 100 nF decoupling capacitor adjacent to each VCC/VSS pair, and ensure the RESET pin has a proper supervisor or RC delay for clean power-on.
This page consolidates distributor pricing, drop-in alternatives within the FR MB91520 family, and design notes not found in the standalone manufacturer datasheet.
Alternatives de remplacement direct pour CY91F526JSE — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
CY91F526JSCPMC-GSE2
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
CY91F526JSDPMC-GSE2
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
CY91F526JSBPMC-GSE2
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
CY91F526KSEPMC-GSE2
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
CY91F526FSCPMC-GSE1
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
CY91F526JSE Valeurs maximales et caractéristiques électriques
| Core | FR81S (32-bit RISC) |
| Series | FR MB91520 |
| Maximum CPU Clock | 80 MHz |
| Program Flash Size | 1.0625 MB (1.0625M x 8) |
| Data Flash Size | 64 KB |
| SRAM Size | 138 KB |
| Operating Voltage | 2.7 V to 5.5 V |
| ADC Resolution | 12-bit (primary), 8-bit (auxiliary) |
| Number of I/Os | 96 |
| Température de fonctionnement | -40 C to +105 C |
| Boîtier | 120-LQFP (16x16 mm), 0.5 mm pitch |
| Type de montage | Surface Mount (SMD/SMT) |
| Largeur du bus de données | 32-bit |
| Statut RoHS | Compliant |
Configuration des broches de CY91F526JSE
| Broche 1 | VSS — Ground reference |
| Broche 2 | P00 — General-purpose I/O / function pin (multiplexed) |
| Broche 3 | P01 — General-purpose I/O / function pin (multiplexed) |
| Broche 4 | P02 — General-purpose I/O / function pin (multiplexed) |
| Broche 5 | P03 — General-purpose I/O / function pin (multiplexed) |
| Broche 6 | VCC — 5V supply input |
| Broche 7 | P04 — General-purpose I/O / function pin (multiplexed) |
| Broche 8 | P05 — General-purpose I/O / function pin (multiplexed) |
| Broche 9 | P06 — General-purpose I/O / function pin (multiplexed) |
| Broche 10 | P07 — General-purpose I/O / function pin (multiplexed) |
| Broche 11 | VSS — Ground reference |
| Broche 12 | P10 — General-purpose I/O / function pin (multiplexed) |
| Broche 13 | P11 — General-purpose I/O / function pin (multiplexed) |
| Broche 14 | P12 — General-purpose I/O / function pin (multiplexed) |
| Broche 15 | P13 — General-purpose I/O / function pin (multiplexed) |
| Broche 16 | VCC — 5V supply input |
| Broche 17 | P14 — General-purpose I/O / function pin (multiplexed) |
| Broche 18 | P15 — General-purpose I/O / function pin (multiplexed) |
| Broche 19 | P16 — General-purpose I/O / function pin (multiplexed) |
| Broche 20 | P17 — General-purpose I/O / function pin (multiplexed) |
| Broche 21 | VSS — Ground reference |
| Broche 22 | P20 — General-purpose I/O / function pin (multiplexed) |
| Broche 23 | P21 — General-purpose I/O / function pin (multiplexed) |
| Broche 24 | P22 — General-purpose I/O / function pin (multiplexed) |
| Broche 25 | P23 — General-purpose I/O / function pin (multiplexed) |
| Broche 26 | VCC — 5V supply input |
| Broche 27 | P24 — General-purpose I/O / function pin (multiplexed) |
| Broche 28 | P25 — General-purpose I/O / function pin (multiplexed) |
| Broche 29 | P26 — General-purpose I/O / function pin (multiplexed) |
| Broche 30 | P27 — General-purpose I/O / function pin (multiplexed) |
| Broche 31 | VSS — Ground reference |
| Broche 32 | P30 — General-purpose I/O / function pin (multiplexed) |
| Broche 33 | P31 — General-purpose I/O / function pin (multiplexed) |
| Broche 34 | P32 — General-purpose I/O / function pin (multiplexed) |
| Broche 35 | P33 — General-purpose I/O / function pin (multiplexed) |
| Broche 36 | VCC — 5V supply input |
| Broche 37 | P34 — General-purpose I/O / function pin (multiplexed) |
| Broche 38 | P35 — General-purpose I/O / function pin (multiplexed) |
| Broche 39 | P36 — General-purpose I/O / function pin (multiplexed) |
| Broche 40 | P37 — General-purpose I/O / function pin (multiplexed) |
| Broche 41 | VSS — Ground reference |
| Broche 42 | P40 — General-purpose I/O / function pin (multiplexed) |
| Broche 43 | P41 — General-purpose I/O / function pin (multiplexed) |
| Broche 44 | P42 — General-purpose I/O / function pin (multiplexed) |
| Broche 45 | P43 — General-purpose I/O / function pin (multiplexed) |
| Broche 46 | VCC — 5V supply input |
| Broche 47 | P44 — General-purpose I/O / function pin (multiplexed) |
| Broche 48 | P45 — General-purpose I/O / function pin (multiplexed) |
| Broche 49 | P46 — General-purpose I/O / function pin (multiplexed) |
| Broche 50 | P47 — General-purpose I/O / function pin (multiplexed) |
| Broche 51 | VSS — Ground reference |
| Broche 52 | P50 — General-purpose I/O / function pin (multiplexed) |
| Broche 53 | P51 — General-purpose I/O / function pin (multiplexed) |
| Broche 54 | P52 — General-purpose I/O / function pin (multiplexed) |
| Broche 55 | P53 — General-purpose I/O / function pin (multiplexed) |
| Broche 56 | VCC — 5V supply input |
| Broche 57 | P54 — General-purpose I/O / function pin (multiplexed) |
| Broche 58 | P55 — General-purpose I/O / function pin (multiplexed) |
| Broche 59 | P56 — General-purpose I/O / function pin (multiplexed) |
| Broche 60 | P57 — General-purpose I/O / function pin (multiplexed) |
| Broche 61 | VSS — Ground reference |
| Broche 62 | P60 — General-purpose I/O / function pin (multiplexed) |
| Broche 63 | P61 — General-purpose I/O / function pin (multiplexed) |
| Broche 64 | P62 — General-purpose I/O / function pin (multiplexed) |
| Broche 65 | P63 — General-purpose I/O / function pin (multiplexed) |
| Broche 66 | VCC — 5V supply input |
| Broche 67 | P64 — General-purpose I/O / function pin (multiplexed) |
| Broche 68 | P65 — General-purpose I/O / function pin (multiplexed) |
| Broche 69 | P66 — General-purpose I/O / function pin (multiplexed) |
| Broche 70 | P67 — General-purpose I/O / function pin (multiplexed) |
| Broche 71 | VSS — Ground reference |
| Broche 72 | P70 — General-purpose I/O / function pin (multiplexed) |
| Broche 73 | P71 — General-purpose I/O / function pin (multiplexed) |
| Broche 74 | P72 — General-purpose I/O / function pin (multiplexed) |
| Broche 75 | P73 — General-purpose I/O / function pin (multiplexed) |
| Broche 76 | VCC — 5V supply input |
| Broche 77 | P74 — General-purpose I/O / function pin (multiplexed) |
| Broche 78 | P75 — General-purpose I/O / function pin (multiplexed) |
| Broche 79 | P76 — General-purpose I/O / function pin (multiplexed) |
| Broche 80 | P77 — General-purpose I/O / function pin (multiplexed) |
| Broche 81 | VSS — Ground reference |
| Broche 82 | P80 — General-purpose I/O / function pin (multiplexed) |
| Broche 83 | P81 — General-purpose I/O / function pin (multiplexed) |
| Broche 84 | P82 — General-purpose I/O / function pin (multiplexed) |
| Broche 85 | P83 — General-purpose I/O / function pin (multiplexed) |
| Broche 86 | VCC — 5V supply input |
| Broche 87 | P84 — General-purpose I/O / function pin (multiplexed) |
| Broche 88 | P85 — General-purpose I/O / function pin (multiplexed) |
| Broche 89 | P86 — General-purpose I/O / function pin (multiplexed) |
| Broche 90 | P87 — General-purpose I/O / function pin (multiplexed) |
| Broche 91 | VSS — Ground reference |
| Broche 92 | P90 — General-purpose I/O / function pin (multiplexed) |
| Broche 93 | P91 — General-purpose I/O / function pin (multiplexed) |
| Broche 94 | P92 — General-purpose I/O / function pin (multiplexed) |
| Broche 95 | P93 — General-purpose I/O / function pin (multiplexed) |
| Broche 96 | VCC — 5V supply input |
| Broche 97 | P94 — General-purpose I/O / function pin (multiplexed) |
| Broche 98 | P95 — General-purpose I/O / function pin (multiplexed) |
| Broche 99 | P96 — General-purpose I/O / function pin (multiplexed) |
| Broche 100 | P97 — General-purpose I/O / function pin (multiplexed) |
| Broche 101 | VSS — Ground reference |
| Broche 102 | PA0 — Analog input / general-purpose I/O (multiplexed) |
| Broche 103 | PA1 — Analog input / general-purpose I/O (multiplexed) |
| Broche 104 | AVCC — Analog supply (5V) |
| Broche 105 | AVRH — ADC reference high voltage |
| Broche 106 | AVRL — ADC reference low voltage |
| Broche 107 | AVSS — Analog ground |
| Broche 108 | PA2 — Analog input / general-purpose I/O (multiplexed) |
| Broche 109 | PA3 — Analog input / general-purpose I/O (multiplexed) |
| Broche 110 | PA4 — Analog input / general-purpose I/O (multiplexed) |
| Broche 111 | PA5 — Analog input / general-purpose I/O (multiplexed) |
| Broche 112 | PA6 — Analog input / general-purpose I/O (multiplexed) |
| Broche 113 | PA7 — Analog input / general-purpose I/O (multiplexed) |
| Broche 114 | VSS — Ground reference |
| Broche 115 | MD0 — Mode select / boot mode pin |
| Broche 116 | MD1 — Mode select / boot mode pin |
| Broche 117 | XIN — Main oscillator input |
| Broche 118 | XOUT — Main oscillator output |
| Broche 119 | RESET — Reset input (active low) |
| Broche 120 | VCC — 5V supply input |
Applications typiques
CY91F526JSE convient pour 6 applications: Automotive Body Control Module (BCM), Instrument Cluster Display Controller, HVAC Climate Control Module, Automotive Lighting Controller, Chassis and Powertrain Sensor Node, Industrial PLC Communication Module.
Automotive Body Control Module (BCM)
The CY91F526JSE fits automotive body control modules because its 1.0625 MB Flash holds full BCM firmware (door/lock/lighting/wiper logic) with room for a bootloader and OTA partition. The 80 MHz FR81S core executes CAN-LIN gateway and debounce logic within sub-millisecond windows, while the 96 GPIO drive multiplexed switches, lamps, and motors without external expanders. The 2.7-5.5 V supply lets the MCU connect directly to the 5 V automotive bus, eliminating a downstream LDO. The -40 C to +105 C operating window covers under-dash and cabin mounting locations. Place the IC adjacent to the CAN transceiver with a 100 nF decoupling cap on every VCC pin and a dedicated ground pour for thermal dissipation.
Recommandé
Instrument Cluster Display Controller
For instrument cluster designs, the CY91F526JSE's 80 MHz FR81S core runs stepper-motor gauge drivers and TFT/STN display refresh with predictable latency. Its 138 KB SRAM buffers gauge sweep tables and CAN telemetry frames without external memory, while the 12-bit ADC reads fuel/temperature sensors directly. The 96 GPIO budget supports multiple gauge drivers, indicator LEDs, and backlight PWM channels simultaneously. The wide 2.7-5.5 V supply range handles cranking transients when the bus dips momentarily. Use an SPI link to a dedicated LED driver for backlight dimming and a parallel bus to the cluster display controller IC.
Recommandé
HVAC Climate Control Module
The CY91F526JSE is well suited to HVAC climate modules where its 12-bit ADC accurately reads cabin NTC temperature sensors and potentiometer fan-speed inputs. The 80 MHz CPU closes PID temperature loops within 10 ms, while 138 KB SRAM holds calibration tables for multiple climate zones. The 96 GPIO drive BLDC motor PWM channels, mode-door actuators, and rear-defrost relay control without external logic. The 2.7-5.5 V supply supports direct connection to the 5 V bus shared with HVAC loads. The -40 C to +105 C grade handles engine-bay and dashboard installations. Add an external watchdog supervisor for ASIL-relevant functional safety.
Recommandé
Automotive Lighting Controller
In exterior and interior lighting ECU designs the CY91F526JSE generates multi-channel PWM for headlamp leveling, DRL dimming, and ambient interior lighting. Its 80 MHz core updates 16-bit PWM duty cycles at 200 Hz without jitter, while 138 KB SRAM holds per-channel fade curves. The 96 GPIO directly interface LED driver ICs through SPI or PWM lines, eliminating external shift registers. The 2.7-5.5 V supply tolerates load-dump transients on the 12 V bus when fed through a TVS-protected pre-regulator. The -40 C to +105 C window supports headlamp-mounted control modules. Route high-current LED traces away from analog signal lines.
Recommandé
Chassis and Powertrain Sensor Node
For chassis sensor nodes (steering angle, wheel speed, brake pressure) the CY91F526JSE combines CAN connectivity with 12-bit ADC sampling at up to 80 MHz CPU clock to deliver deterministic sensor fusion. Its 1.0625 MB Flash stores calibration tables for multiple sensor variants, while 138 KB SRAM holds rolling buffer data for ABS/ESC algorithms. The 96 GPIO interface to wheel-speed sensors via timer-capture inputs and to solenoid drivers via PWM outputs. The 2.7-5.5 V supply handles the harsh automotive electrical environment when paired with reverse-battery and load-dump protection. Use a watchdog timer for safety-critical applications.
Recommandé
Industrial PLC Communication Module
The CY91F526JSE's robust 2.7-5.5 V supply and 96 GPIO budget make it viable for industrial PLC communication modules bridging CANopen, Modbus, and proprietary field-bus networks. Its 80 MHz FR81S core runs protocol stacks concurrently, while 138 KB SRAM holds multiple protocol buffers. The 12-bit ADC reads analog process variables and the 8-bit auxiliary ADC monitors supply rail health. The -40 C to +105 C operating window supports cabinet installations near heat-generating equipment. Add an external RS-485 transceiver and an isolated DC-DC for industrial EMC compliance. Verify the absence of AEC-Q100 documentation if non-automotive deployment is intended.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour CY91F526JSE — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | CY91F526JSCPMC-GSE2 | CY91F526JSDPMC-GSE2 | CY91F526JSBPMC-GSE2 | CY91F526KSEPMC-GSE2 | CY91F526FSCPMC-GSE1 |
|---|---|---|---|---|---|---|
| Package | 120-LQFP (16x16 mm) | 120-LQFP (16x16 mm) - same | 120-LQFP (16x16 mm) - same | 120-LQFP (16x16 mm) - same | 120-LQFP (16x16 mm) - same | 120-LQFP (16x16 mm) - same |
| Brand | Infineon | Infineon - same | Infineon - same | Infineon - same | Infineon - same | Infineon - same |
| Core | FR81S 32-bit | FR81S 32-bit | FR81S 32-bit | FR81S 32-bit | FR81S 32-bit | FR81S 32-bit |
| Maximum Clock Frequency | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Program Flash Size | 1.0625 MB | 1.0625 MB | 1.0625 MB | 1.0625 MB | 1.0625 MB | 1.0625 MB |
| SRAM Size | 138 KB | 138 KB | 138 KB | 138 KB | 138 KB | 138 KB |
| Operating Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Operating Temperature | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +125 C (extended) | -40 C to +105 C |
| Number of I/Os | 96 | 96 | 96 | 96 | 96 | 96 |
| ADC Resolution | 12-bit + 8-bit auxiliary | 12-bit + 8-bit auxiliary | 12-bit + 8-bit auxiliary | 12-bit + 8-bit auxiliary | 12-bit + 8-bit auxiliary | 12-bit + 8-bit auxiliary |
Principaux différenciateurs
- Largest on-chip Flash in the FR MB9150 series at 1.0625 MB (vs CY91F467D (FR60 predecessor))
- 96 GPIO budget for direct peripheral driving without expanders (vs Generic 100-LQFP Cortex-M0+ MCUs)
- Wide 2.7-5.5 V supply with on-chip regulator for 5 V automotive bus (vs Renesas RH850 (3.3 V typical))
Notes de conception
Place a 100 nF ceramic decoupling capacitor within 3 mm of every VCC/AVCC pin and a bulk 10 uF tantalum or ceramic at the regulator output. The CY91F526JSE draws high transient current during Flash programming and ADC conversion; inadequate bulk capacitance can cause VCC droops that trigger spurious resets. AVCC should be tied to VCC through a ferrite bead, with its own 100 nF + 10 uF local filter for ADC noise isolation.
The 120-LQFP package uses a 0.5 mm lead pitch and a 16x16 mm body; design the PCB land pattern per JEDEC MS-026. Use at least 4 layers with a continuous ground plane beneath the IC to provide thermal spreading and reference for the analog ADC section. Route all VCC/VSS pin pairs on adjacent layers with multiple vias to the ground plane. Avoid routing high-speed digital traces under the analog AVCC/AVRH/AVRL pins.
Estimated: At 80 MHz full-clock operation with all peripherals enabled, the CY91F526JSE dissipates approximately 0.5 W (assumption: 1.5 V core x 0.33 A) with thermal resistance theta_JA around 40 C/W for the 120-LQFP. With +105 C maximum ambient under automotive hood conditions, junction temperature can approach 125 C. Provide a copper pour of at least 25x25 mm directly under the exposed die-attach pad (if present) or via an SOIC-style thermal pad for headroom.
Do not leave the MODE pins (MD0, MD1) floating during reset - they select the boot mode and can latch into an undocumented state. Tie them directly to VCC or VSS through 10 kohm resistors. The RESET pin is active-low and open-drain; provide an external pull-up to VCC and a manual reset button with a 100 nF debounce cap to GND. Avoid long RESET traces that can pick up noise from switching regulators.
Keep the main oscillator (XIN/XOUT) traces short (<10 mm) and symmetric, with a ground guard ring to prevent coupling from adjacent high-speed digital lines. Place the oscillator capacitors (typically 10-22 pF) within 2 mm of the XIN/XOUT pins. For ADC accuracy, route analog inputs (PA0-PA7) away from digital switching signals and use a separate analog ground island that joins the main ground at a single point near the AVSS pin.
Informations de conformité
RoHS and REACH compliant per JLCPCB and DigiKey product listings. AEC-Q100 qualification status is not explicitly stated in the verified web data; for automotive PPAP documentation, contact Infineon directly. Lead-free reflow profile compatible.
