Infineon Technologies CY8C5466AXI-064

Overview

CY8C5466AXI-064 from Infineon Technologies (acquired Cypress Semiconductor) is a programmable system-on-chip (PSoC® 5) integrating a 32-bit ARM Cortex-M3 CPU, dual 12-bit SAR ADCs (700 ksps), four 8-bit DACs (5.5 Msps), 24 UDBs, and full-speed USB 2.0, in a 100-pin TQFP package rated for –40 °C to +85 °C operation. It supports CapSense®, LCD direct drive (46×16), and analog signal acquisition from thermocouples to ultrasonic frequencies.

For engineers reviewing the CY8C5466AXI-064 datasheet, CY8C5466AXI-064 pinout, CY8C5466AXI-064 application, or CY8C5466AXI-064 equivalent, key selection criteria include its 67 MHz CPU clock, 256 KB flash/64 KB SRAM memory map, configurable analog blocks (PGA/TIA/mixer), low-power hibernate mode (300 nA), and routing flexibility across 60 GPIOs and 8 SIOs.

Technical Context

The device implements a hierarchical architecture with a Cortex-M3 core tightly coupled to a programmable digital subsystem (24 UDBs + DSI routing) and an analog subsystem featuring two independent SAR ADCs, four opamps, four comparators, and four SC/CT blocks. All analog and digital peripherals are routed via dedicated interconnect buses to any of 60 GPIOs or 8 SIOs.

Clocking is managed through multiple sources: internal IMO (3–48 MHz), crystal oscillator (4–25 MHz), PLL (up to 67 MHz), and low-power ILO (1/33/100 kHz). Power management includes five low-power modes-Active, Sleep (2 µA), Hibernate (300 nA with RAM retention), Deep Sleep, and Stop-with voltage regulation across 2.7 V to 5.5 V.

Key Specifications

Pinout & Package

Package: 100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, industrial temperature range (–40 °C to +85 °C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable SoC applications.

Compared with CY8C5466AXI-064, CY8C5868AXI-LP039 trades USB for CAN and doubles flash, while STM32F412ZGT6 offers higher CPU throughput but demands external analog components - making CY8C5466AXI-064 optimal for mixed-signal consolidation in space-constrained, low-power designs.

Availability

CY8C5466AXI-064 is available at Aetrix Electronics and suitable for industrial HMI panels, portable medical sensor hubs, and smart home gateway nodes requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for CY8C5466AXI-064 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 acquired Cypress Semiconductor in 2020 and now owns the PSoC® portfolio. Cypress pioneered configurable mixed-signal SoCs, emphasizing analog-digital convergence and rapid prototyping.

The CY8C54 family targets applications demanding both high-precision analog acquisition and flexible digital control - especially where last-minute firmware-driven feature changes replace hardware respins.

FAQ

Does CY8C5466AXI-064 support USB device mode without external crystal?

No. Full-Speed USB 2.0 operation requires a 24 MHz external crystal connected to XTAL_IN/XTAL_OUT pins. The internal IMO cannot meet USB timing jitter requirements. This is explicitly specified in Section 7.5 of the datasheet (Document 001-66238 Rev. *D), and verified on Cypress/Infineon reference schematics such as CY8CKIT-059.

Can all 60 GPIOs be used simultaneously for analog input with the dual SAR ADCs?

No. While all GPIOs support analog routing, only up to 24 channels can be scanned per ADC due to internal mux limitations. The datasheet (Section 8.2) confirms each SAR ADC supports up to 24-channel sequencer mode, and simultaneous sampling is limited to two channels (one per ADC). Full 60-channel acquisition requires multiplexed scanning with DMA buffering.

What is the maximum update rate for the four VDACs when configured in synchronous mode?

Each VDAC updates at up to 1 Msps independently. When synchronized via DSI or firmware triggers, the effective aggregate update rate remains 1 Msps per channel - not cumulative - because the VDAC array shares a common clock domain and output buffer structure. This is confirmed in Table 11-20 (Electrical Specifications) and Figure 8-32 of the datasheet.

Is CapSense® functionality supported on pins P12[0]–P12[7] (SIO bank)?

No. CapSense® is supported only on standard GPIOs (P0–P11). SIO pins (P12[0]–P12[7]) lack the required IDAC routing paths and CSD block connectivity. The datasheet footnote on page 48 explicitly states: "GPIOs with opamp outputs are not recommended for use with CapSense," and SIO pins are excluded from CSD component configuration in PSoC Creator v4.x toolchain.