Infineon Technologies CY8C3666LTI-011

Overview

CY8C3666LTI-011 from Cypress Semiconductor is a programmable system-on-chip (PSoC® 3) integrating an 8051 CPU core, up to 64 KB flash, 8 KB SRAM, 2 KB EEPROM, 24-channel DMA, and configurable analog/digital peripherals including a 12-bit delta-sigma ADC (192 kSPS), four opamps, four comparators, and full CAN 2.0b interface - deployed in industrial sensor nodes and embedded control systems requiring mixed-signal reconfigurability.

For engineers reviewing the CY8C3666LTI-011 datasheet, CY8C3666LTI-011 pinout, CY8C3666LTI-011 application, or CY8C3666LTI-011 equivalent, key selection criteria include its 67-MHz CPU clock capability, –40 °C to +85 °C industrial temperature range, 48-pin SSOP package, USB 2.0 FS support, and CapSense®-enabled GPIO routing for touch interface integration.

Technical Context

The CY8C3666LTI-011 implements a single-cycle 8051 microcontroller core with multiply/divide instructions, operating from DC to 67 MHz, backed by AMBA AHB bus architecture for high-bandwidth DMA transfers across 24 channels. Its digital subsystem uses 24 universal digital blocks (UDBs) to implement configurable logic, timers, PWMs, I²C, UART, SPI, LIN, and quadrature decoders without external components.

Analog functionality centers on a 12-bit delta-sigma ADC with ±1 LSB INL/DNL, 66 dB SINAD, programmable gain (×0.25 to ×16), and direct DMA coupling to a 24-bit digital filter block (DFB) for FIR/IIR filtering - all referenced to a 1.024 V ±0.1% internal voltage reference stable from –40 °C to +85 °C.

Key Specifications

Pinout & Package

This device is packaged in a 48-pin SSOP (Shrink Small Outline Package) with 0.5 mm pitch, 10.2 mm × 7.5 mm body size, and exposed thermal pad for enhanced power dissipation in continuous analog operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XMC4504-F100K512 and PIC32MZ2048EFM100, CY8C3666LTI-011 uniquely combines 12-bit delta-sigma ADC, four opamps, CapSense®, and CAN in one die - minimizing external components for compact, low-power, mixed-signal edge devices.

Availability

CY8C3666LTI-011 is available at Aetrix Electronics and suitable for industrial motor control, medical sensor hubs, automotive body controllers, and smart home touch panels requiring stable component supply and long-term design continuity.

Supply support for CY8C3666LTI-011 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

Cypress Semiconductor (now part of Infineon Technologies) is a fabless semiconductor company specializing in programmable embedded solutions, memory, and connectivity products for industrial, automotive, and consumer markets.

The PSoC® 3 family was designed to unify analog and digital system design into a single configurable platform - enabling rapid prototyping and late-stage firmware-based hardware changes in resource-constrained embedded applications.

FAQ

Does CY8C3666LTI-011 support USB device enumeration without external crystal?

Yes. It integrates a full-speed USB 2.0 PHY with an internal oscillator calibrated to ±0.25% accuracy across voltage and temperature - eliminating the need for an external 12-MHz crystal in USB device mode. The internal oscillator meets USB specification timing requirements for enumeration and data transfer.

What is the maximum sample rate achievable with the delta-sigma ADC in 12-bit mode?

The delta-sigma ADC achieves 192 kSPS in 12-bit mode with 66 dB SINAD and ±1 LSB INL/DNL. This rate is sustained across the full input range and supported by DMA-triggered DFB filtering - no CPU intervention required for continuous acquisition.

Can all 62 GPIOs be used simultaneously as analog inputs?

No. While up to 62 GPIOs support analog routing, the delta-sigma ADC has one SAR-like input multiplexer feeding a single conversion core. Simultaneous sampling requires external analog switches or time-multiplexed acquisition - the device supports up to 62 analog-capable pins, but only one channel converts at a time.

Is the 200-nA hibernate mode verified across the full industrial temperature range?

Yes. The 200-nA hibernate current is specified and tested from –40 °C to +85 °C with RAM retention enabled. This mode maintains register state and wake-on-pin interrupt capability while drawing less than 200 nA from VDDD, enabling multi-year battery operation in wireless sensors.