CY8C5688AXI-LP099 - PSoC 5LP 80MHz Cortex-M3 MCU 256KB Flash | Infineon
MPN: CY8C5688AXI-LP099 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.8 | $168.00 |
| 100 | $14.95 | $1,495.00 |
| 500 | $13.2 | $6,600.00 |
| 1,000 | $11.75 | $11,750.00 |
CY8C5688AXI-LP099 Overview
A PSoC 5LP device is a mixed-signal programmable SoC that combines a Cortex-M3 CPU, programmable universal digital blocks (UDBs), programmable analog blocks (SC/CT blocks), and fixed-function peripherals on a single die. Within the broader hierarchy it belongs to microcontrollers (MCU) -> 32-bit MCU -> ARM Cortex-M MCU -> programmable SoC -> embedded processing. The architecture lets designers replace discrete op-amps, comparators, ADCs, DACs and timing glue logic with on-chip configurable blocks, shortening BOM count and PCB area.
Key features of the CY8C5688AXI-LP099 include 24 UDBs for custom digital logic, four op-amps with PGA modes, four DACs, two SAR ADCs at up to 1 Msps, four TCPWM blocks, USB full-speed, CAN, I2C, SPI, UART, and an integrated CapSense touch engine. The wide 1.71 V to 5.5 V supply simplifies direct connection to a single Li-ion cell, 3.3 V logic rails, or 5 V industrial buses without external level shifters.
The Cortex-M3 core with single-cycle multiply and a DMA controller delivers deterministic interrupt response and sustained DSP throughput at 80 MHz, while the UDB array accelerates state machines, custom peripherals and glue logic in hardware, off-loading the CPU. The on-chip regulator and low-power modes (Sleep, Deep Sleep, Hibernate) enable battery-friendly designs.
Typical applications include industrial HMI panels with CapSense, motor control front-ends, USB/CAN sensor hubs, programmable sensor conditioning, medical portable instruments, and home appliances. Designers choose the CY8C5688AXI-LP099 when they want analog configurability that a stock Cortex-M MCU does not provide.
When designing, populate the unused analog block pins to defined states to avoid leakage, and provide a 1 uF + 100 nF decoupling pair adjacent to each VDD/VBAT pin to keep the internal regulator stable. Place the 32.768 kHz watch crystal as close as practical to the XTAL pins and route its traces over a continuous ground pour to limit radiated emissions.
This page synthesizes distributor pricing, drop-in 100-pin TQFP alternatives from the same PSoC 5LP family, and practical bring-up notes not collected in a single manufacturer datasheet, supporting faster sourcing and design-in decisions for industrial and consumer embedded projects.
Drop-in alternatives for CY8C5688AXI-LP099 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with CY8C5688AXI-LP099 (same form factor and footprint) — differing in Package, Operating Temperature, Communication Interfaces, Op-Amps, SRAM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
CY8C5668AXI-LP034
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C5888AXI-LP096
✅ Drop-In✓ In Stock
$18.91 / Unit
View Datasheet →CY8C5668AXI-LP041
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CY8C5688AXI-LP106
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CY8C3866AXI-035
✅ Drop-In✓ In Stock
$9.3 / Unit
View Datasheet →CY8C5688AXI-LP099 Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M3 (32-bit) |
| Maximum CPU Clock | 80 MHz |
| Program Memory (Flash) | 256 KB |
| SRAM | 64 KB |
| Supply Voltage Range | 1.71 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | 100-pin TQFP (14x14 mm) |
| Mounting Type | Surface Mount |
| ADC | 2 x 12-bit SAR ADC |
| DAC | 4 x 8-bit DAC |
| Programmable Digital Blocks (UDBs) | 24 |
| Op-Amps | 4 (PGA-capable) |
| TCPWM Blocks | 4 |
| Communication Interfaces | USB Full-Speed, CAN, I2C, SPI, UART |
| CapSense Support | Yes (CapSense Sigma-Delta) |
| RoHS Status | Compliant |
CY8C5688AXI-LP099 100-pin tqfp (14x14 mm) Pin Configuration Guide
Pin configuration for CY8C5688AXI-LP099 (100-pin tqfp (14x14 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for CY8C5688AXI-LP099.
Refer to the datasheet for full pin configuration.
Typical Applications
CY8C5688AXI-LP099 is suitable for 6 applications: Industrial HMI with CapSense, USB Sensor Hub, Motor Control Front-End, Programmable Sensor Conditioning, Medical Portable Instrument, Home Appliance Control.
Industrial HMI with CapSense
The CY8C5688AXI-LP099 is a strong fit for industrial HMI panels because its CapSense Sigma-Delta hardware implements up to 62 touch sensors without external touch ICs, while the four on-chip op-amps drive LED backlight current-sense and the four TCPWM blocks generate precise dimming PWM. The 256 KB Flash hosts a full emWin / LVGL graphical stack plus a Modbus RTU slave over UART, and the 1.71 V to 5.5 V supply allows direct 24 V industrial-bus operation after a small buck stage. Designers gain BOM reduction by replacing a touch controller, op-amp array, and timing IC with a single PSoC.
Recommended
USB Sensor Hub
In USB sensor hubs the CY8C5688AXI-LP099 integrates a USB Full-Speed device controller, four op-amps for sensor excitation, and two 12-bit SAR ADCs at 1 Msps to digitize analog sensors directly. The Cortex-M3 at 80 MHz plus DMA offloads USB HID class handling into the background, while the 64 KB SRAM buffers high-rate sensor streams before USB frames are scheduled. This single-chip solution replaces a discrete MCU plus USB controller plus analog front-end, reducing PCB area and BOM count in industrial sensor pods.
Recommended
Motor Control Front-End
The CY8C5688AXI-LP099 supports motor-control front-ends via its four TCPWM blocks, four op-amps and 12-bit SAR ADC, providing current sensing, back-EMF digitizing, and PWM generation for trapezoidal or FOC algorithms in low-to-mid power BLDC and PMSM drives. The 24 UDBs implement custom encoder interfaces or Hall-sensor de-bouncing in hardware, off-loading the 80 MHz Cortex-M3. Wide 1.71 V to 5.5 V supply simplifies bootstrap supplies, and the 100-pin TQFP exposes enough GPIO for multi-axis coordination in compact driver boards.
Recommended
Programmable Sensor Conditioning
The CY8C5688AXI-LP099 excels in programmable sensor-conditioning modules because its four op-amps (configurable as PGA, transimpedance, or difference amps) and four 8-bit DACs support auto-zero bridge excitation, RTD linearization, and thermistor compensation on-chip. The two SAR ADCs simultaneously digitize the conditioned signal and a reference channel for ratiometric measurements. The Cortex-M3 runs linearization tables and I2C/SPI communication, while the configurable analog fabric replaces 4 to 6 precision op-amps typically used in instrumentation front-ends, cutting BOM and improving thermal drift tracking.
Recommended
Medical Portable Instrument
The CY8C5688AXI-LP099 is well suited to medical portable instruments because its wide 1.71 V to 5.5 V supply allows direct Li-ion operation, and Hibernate mode at a few microamperes preserves battery between measurements. The 256 KB Flash and 64 KB SRAM host a real-time ECG / pulse-oximetry DSP pipeline plus USB-CDC data export, while the integrated 12-bit SAR ADC handles electrode and SpO2 photodiode readout. The Cortex-M3 with single-cycle MAC executes FIR / IIR filters in real time, and PSoC Creator medical-class libraries shorten FDA submission risk in low-to-medium classification devices.
Recommended
Home Appliance Control
In home appliances such as washing machines, induction cooktops and smart thermostats, the CY8C5688AXI-LP099 replaces the main control MCU plus discrete op-amp / comparator / timer ICs, reducing component count and improving reliability. Its four TCPWM blocks drive triac firing, relay control and buzzer tones, while the integrated op-amps sense NTC temperature and zero-cross detectors. CapSense enables sealed glass-front user interfaces, and the 256 KB Flash hosts the appliance firmware plus a graphical menu with minimal external memory. Industrial -40C to +85C operation covers garage and outdoor appliance variants.
Recommended
Recommended Products Summary
Engineering reference data for CY8C5688AXI-LP099 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CY8C5668AXI-LP034 | CY8C5888AXI-LP096 | CY8C5668AXI-LP041 | CY8C5688AXI-LP106 | CY8C3866AXI-035 |
|---|---|---|---|---|---|---|
| Package | 100-pin TQFP (14x14 mm) | 100-pin TQFP (14x14 mm) | 100-pin TQFP (14x14 mm) | 100-pin TQFP (14x14 mm) | 100-pin TQFP (14x14 mm) | 100-pin TQFP (14x14 mm) |
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Core | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M4F | ARM Cortex-M3 | ARM Cortex-M3 | 8051 (8-bit) |
| Max CPU Clock | 80 MHz | 67 MHz | 80 MHz | 80 MHz | 80 MHz | 67 MHz |
| Flash | 256 KB | 256 KB | 1 MB | 256 KB | 256 KB | 64 KB |
| SRAM | 64 KB | 64 KB | 256 KB | 64 KB | 64 KB | 8 KB |
| Operating Voltage | 1.71 V to 5.5 V | 1.71 V to 5.5 V | 1.71 V to 5.5 V | 1.71 V to 5.5 V | 1.71 V to 5.5 V | 1.71 V to 5.5 V |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +105C | -40C to +85C |
| CapSense Support | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Configurable analog and digital fabric on-chip (vs CY8C3866AXI-035)
- Cortex-M3 vs Cortex-M4F for cost optimization (vs CY8C5888AXI-LP096)
- Full-speed USB on-chip vs external PHY (vs CY8C5668AXI-LP034)
Design Notes
Place a 1 uF X7R ceramic plus a 100 nF X7R ceramic as close as possible to each VDD/VBAT/VDDA pin pair of the CY8C5688AXI-LP099. The internal regulator that powers the Cortex-M3 core is sensitive to high-frequency impedance; without local decoupling you may see reset issues or USB Full-Speed enumeration failures. The 100-TQFP package has multiple VDD pins - every one must be decoupled separately, not shared through a single capacitor.
Route the 32.768 kHz watch crystal traces short and symmetric, with a continuous ground pour underneath and guard traces around them to limit noise coupling into the CapSense sigma-delta block. Keep analog routing (op-amp inputs, ADC inputs, reference) away from TCPWM PWM outputs and digital switching nodes, and use a star-ground topology so analog and digital return currents join only at the exposed pad ground under the TQFP.
Do not leave unused analog block pins floating - configure them in PSoC Creator as Analog Disable / High-Z analog to prevent leakage that can corrupt adjacent ADC measurements. Avoid programming Flash above 1.71 V during Hibernate transitions or below 5 V if your design relies on the internal IMO at full 80 MHz; if the supply droops, the CPU will hang on a flash wait state. Always validate SWD / JTAG clock rate against VDDIO before debug attach, since PSoC Creator's default 1.5 MHz SWD may fail at very low VDD.
Compliance Information
RoHS and REACH compliant per Infineon product page. Industrial temperature grade -40C to +85C; choose CY8C5688AXI-LP106 for extended -40C to +105C operation. No AEC-Q100 variant in this family; for AEC-Q100 designs use Cypress / Infineon automotive PSoC families such as Traveo II.
