CY8C29666-24LTXI - 8-bit PSoC1 MCU 32KB Flash 24MHz | Infineon
料号： CY8C29666-24LTXI ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $14.5 | $14.50 |
| 10 | $13.2 | $132.00 |
| 100 | $11.4 | $1,140.00 |
| 500 | $9.85 | $4,925.00 |
| 1,000 | $8.6 | $8,600.00 |
CY8C29666-24LTXI 概述
A PSoC (Programmable System-on-Chip) is a mixed-signal MCU family that combines an 8-bit core with a fabric of user-configurable analog and digital blocks, occupying the role of a hybrid between a traditional microcontroller, an FPGA, and an analog ASIC. The PSoC 1 line belongs to the broader microcontroller -> 8-bit MCU -> mixed-signal MCU category within Infineon's programmable device portfolio, and is designed for designers who need flexible peripheral integration without the BOM cost of multiple dedicated ICs.
Key features include the M8C Harvard-architecture 8-bit core running up to 24 MHz, on-chip full-speed USB support in the CY8C29xxx family, four dedicated hardware timers, an I2C master/slave interface, a full-duplex UART, and an integrated voltage reference. The 12 analog blocks support programmable gain amplifiers, ADCs, DACs, filters, and comparators, while the 16 digital blocks can be configured as timers, counters, PWMs, UARTs, SPI, or CRC generators. This configurability enables a single device to implement multiple analog and digital peripherals that would otherwise require several dedicated ICs.
Architecturally, the device pairs a von Neumann analog/digital routing fabric with the M8C core, allowing analog and digital signals to be interconnected dynamically under firmware control. The 32 KB Flash supports in-system programming via ISSP, and the 2 KB SRAM is sufficient for typical mixed-signal state-machine designs. The exposed-pad 48-QFN package provides a low thermal-resistance path, with industrial temperature range support from -40 °C to +85 °C.
Typical applications include USB HID peripherals, custom sensor conditioning front-ends, industrial control panels, white-goods user interfaces, and battery-powered mixed-signal instrumentation. The wide 3.0-5.25 V supply tolerance makes it well-suited to both 3.3 V and 5 V system designs without level translation.
When designing with the CY8C29666-24LTXI, allocate sufficient PCB copper under the exposed pad to keep junction temperature in range at full 24 MHz operation. Use PSoC Designer or the newer PSoC Creator toolchain for firmware development, and consult the Infineon family datasheet for analog block routing constraints when placing high-impedance sensor signals.
This page synthesizes distributor pricing, drop-in alternatives from the same CY8C29xxx family, and practical design notes not aggregated on a single distributor page.
直接替换替代料： CY8C29666-24LTXI ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
CY8C29466-24LFXI
✅ 直接替换📋 参考替代料（不在目录中）
CY8C29866-24LTXI
✅ 直接替换📋 参考替代料（不在目录中）
CY8C29666-24LTXIT
✅ 直接替换📋 参考替代料（不在目录中）
CY8C29666-24PVXI
✅ 直接替换📋 参考替代料（不在目录中）
CY8C29766-24LTXI
✅ 直接替换📋 参考替代料（不在目录中）
CY8C29666-24LTXA
✅ 直接替换📋 参考替代料（不在目录中）
CY8C29666-24LTXI 最大额定值与电气特性
| Core | M8C 8-bit |
| Core Architecture | Harvard |
| 最大时钟频率 | 24 MHz |
| Program Memory (Flash) | 32 KB (32K x 8) |
| SRAM | 2 KB |
| Operating Voltage Range | 3.0 V to 5.25 V |
| Number of I/O Pins | 44 |
| Programmable Digital Blocks | 16 |
| Programmable Analog Blocks | 12 |
| 封装 | 48-QFN (7x7 mm) with exposed pad |
| 安装类型 | Surface Mount |
| 工作温度范围 | -40 °C to +85 °C |
| USB Support | Full-Speed USB (CY8C29xxx family) |
| On-chip Debug | ISSP (In-System Serial Programming) |
| RoHS 状态 | Compliant |
CY8C29666-24LTXI 引脚配置
| 引脚 1 | P0[0] — GPIO / analog I/O |
| 引脚 2 | P0[1] — GPIO / analog I/O |
| 引脚 3 | P0[2] — GPIO / analog I/O |
| 引脚 4 | P0[3] — GPIO / analog I/O |
| 引脚 5 | P0[4] — GPIO / analog I/O |
| 引脚 6 | P0[5] — GPIO / analog I/O |
| 引脚 7 | P0[6] — GPIO / analog I/O |
| 引脚 8 | P0[7] — GPIO / analog I/O |
| 引脚 9 | P1[0] — GPIO / I2C SCL / analog I/O |
| 引脚 10 | P1[1] — GPIO / I2C SDA / analog I/O |
| 引脚 11 | P1[2] — GPIO / analog I/O |
| 引脚 12 | P1[3] — GPIO / analog I/O |
| 引脚 13 | P1[4] — GPIO / analog I/O |
| 引脚 14 | P1[5] — GPIO / analog I/O |
| 引脚 15 | P1[6] — GPIO / analog I/O |
| 引脚 16 | P1[7] — GPIO / analog I/O |
| 引脚 17 | P2[0] — GPIO / analog I/O |
| 引脚 18 | P2[1] — GPIO / analog I/O |
| 引脚 19 | P2[2] — GPIO / analog I/O |
| 引脚 20 | P2[3] — GPIO / analog I/O |
| 引脚 21 | P2[4] — GPIO / analog I/O |
| 引脚 22 | P2[5] — GPIO / analog I/O |
| 引脚 23 | P2[6] — GPIO / analog I/O |
| 引脚 24 | P2[7] — GPIO / analog I/O |
| 引脚 25 | P3[0] — GPIO / analog I/O |
| 引脚 26 | P3[1] — GPIO / analog I/O |
| 引脚 27 | P3[2] — GPIO / analog I/O |
| 引脚 28 | P3[3] — GPIO / analog I/O |
| 引脚 29 | P3[4] — GPIO / analog I/O |
| 引脚 30 | P3[5] — GPIO / analog I/O |
| 引脚 31 | P3[6] — GPIO / analog I/O |
| 引脚 32 | P3[7] — GPIO / analog I/O |
| 引脚 33 | P4[0] — GPIO / analog I/O |
| 引脚 34 | P4[1] — GPIO / analog I/O |
| 引脚 35 | P4[2] — GPIO / analog I/O |
| 引脚 36 | P4[3] — GPIO / analog I/O |
| 引脚 37 | P5[0] — GPIO |
| 引脚 38 | P5[1] — GPIO |
| 引脚 39 | P5[2] — GPIO |
| 引脚 40 | P5[3] — GPIO |
| 引脚 41 | D+ — USB data plus (when USB enabled) |
| 引脚 42 | D- — USB data minus (when USB enabled) |
| 引脚 43 | XRES — External reset, active high |
| 引脚 44 | VDD — Supply voltage (3.0 V to 5.25 V) |
| 引脚 45 | VSS — Ground |
| 引脚 46 | VDD — Supply voltage |
| 引脚 47 | VSS — Ground |
| 引脚 48 | EP — Exposed thermal pad - connect to ground |
典型应用
CY8C29666-24LTXI 适用于 6 应用s: USB HID Peripherals, Industrial Control Panels, Custom Sensor Signal Conditioning, White Goods User Interface, Battery-Powered Sensor Hubs, Mixed-Signal Instrumentation Front-End.
USB HID Peripherals
The CY8C29666-24LTXI integrates a full-speed USB 2.0 controller alongside 16 configurable digital blocks, making it ideal for USB HID peripherals such as custom keyboards, mice, game controllers, and industrial input devices. Its 24 MHz M8C core handles USB enumeration, HID report formatting, and debouncing, while the digital block fabric can implement multiple debounce timers or PWM-driven LED feedback channels in firmware. With 32 KB Flash for HID descriptor tables and 2 KB SRAM for endpoint buffers, designers can replace external USB-serial bridges plus a small MCU with one PSoC. The 3.0-5.25 V supply tolerance simplifies bus-powered designs, eliminating the need for a separate LDO.
推荐
Industrial Control Panels
For industrial control panels the CY8C29666-24LTXI provides 44 GPIO for keypad scanning, LCD drive, LED status indication, and relay outputs without external logic. Its 12 analog blocks can be configured as multiple ADC channels for voltage/current monitoring, and the 16 digital blocks implement PWM outputs for dimming or proportional valve control. The 3.0-5.25 V supply range matches 24 V industrial rails after a simple buck converter, and the -40 °C to +85 °C industrial temperature range covers most factory environments. 32 KB Flash supports Modbus or CANopen protocol stacks for panel-to-PLC communication.
推荐
Custom Sensor Signal Conditioning
The CY8C29666-24LTXI's 12 configurable analog blocks can implement instrumentation amplifiers, active filters, and ADCs to condition signals from sensors such as load cells, thermocouples, RTDs, and strain gauges - all in firmware without external op-amps. The 16 digital blocks provide PWM excitation for ratiometric sensors and decimation filters for sigma-delta ADC output. The 32 KB Flash accommodates calibration tables and linearization polynomials, and 2 KB SRAM is sufficient for moving-average filters. With 44 GPIO, the same chip can also drive a local display and communicate via UART or I2C to a host controller.
推荐
White Goods User Interface
White goods (washing machines, dishwashers, refrigerators) need capacitive touch, rotary encoders, LED indicators, motor-driver PWM, and serial communication to a main control board. The CY8C29666-24LTXI handles all of these with its 16 digital blocks (PWM, timer, quadrature decode) and 12 analog blocks (CapSense touch sensing, ADC for temperature sensors). The 32 KB Flash supports user-interface firmware with menu logic, error codes, and diagnostic routines. The 3.0-5.25 V range directly interfaces with 5 V white-goods power rails, and the -40 °C to +85 °C industrial range covers appliance environments including cold-storage rooms.
推荐
Battery-Powered Sensor Hubs
Battery-powered sensor hubs benefit from the CY8C29666-24LTXI's programmable fabric that allows unused analog and digital blocks to be powered down dynamically, reducing quiescent current in sleep states. The 3.0 V minimum supply directly supports 2xAA or 1x lithium primary cells, and the M8C core's efficient interrupt handling wakes only on configured GPIO events. With 32 KB Flash for sensor-fusion code and 2 KB SRAM for sample buffers, the chip can aggregate temperature, humidity, and motion data from external sensors via I2C or SPI and forward them via UART, USB, or RF link. The exposed-pad 48-QFN provides thermal relief for sealed enclosures.
推荐
Mixed-Signal Instrumentation Front-End
Test and measurement front-ends benefit from the CY8C29666-24LTXI's combination of configurable ADCs, DACs, filters, and digital timing blocks. The 12 analog blocks can build simultaneous-sample ADCs for multi-phase voltage/current measurement, and the 16 digital blocks can implement DMA-style sample sequencing without CPU intervention. The 32 KB Flash accommodates calibration and unit-conversion tables, while 2 KB SRAM serves as a sample FIFO. The 48-QFN exposed-pad package keeps the die cool even at full 24 MHz operation in dense bench instruments, and the 5.25 V maximum supply directly powers from USB-VBUS or 5 V bench rails.
推荐
推荐产品汇总
工程参考数据： CY8C29666-24LTXI ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | CY8C29466-24LFXI | CY8C29866-24LTXI | CY8C29666-24LTXIT | CY8C29666-24PVXI | CY8C29766-24LTXI | CY8C29666-24LTXA |
|---|---|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon | Infineon | Infineon |
| Package | 48-QFN (7x7 mm) exposed pad | 48-QFN (7x7 mm) exposed pad - same | 48-QFN (7x7 mm) exposed pad - same | 48-QFN (7x7 mm) exposed pad - same | 48-QFN (7x7 mm) - same | 48-QFN (7x7 mm) exposed pad - same | 48-QFN (7x7 mm) exposed pad - same |
| Core / Frequency | M8C 8-bit / 24 MHz | M8C 8-bit / 24 MHz | M8C 8-bit / 24 MHz | M8C 8-bit / 24 MHz | M8C 8-bit / 24 MHz | M8C 8-bit / 24 MHz | M8C 8-bit / 24 MHz |
| Flash | 32 KB | 16 KB (-50%) | 64 KB (+100%) | 32 KB (same) | 32 KB (same) | 32 KB (same) | 32 KB (same) |
| SRAM | 2 KB | 1 KB (-50%) | 2 KB (same) | 2 KB (same) | 2 KB (same) | 2 KB (same) | 2 KB (same) |
| Digital Blocks | 16 | 16 (same) | 16 (same) | 16 (same) | 16 (same) | 16 (same) | 16 (same) |
| Analog Blocks | 12 | 12 (same) | 12 (same) | 12 (same) | 12 (same) | 12 (same) | 12 (same) |
| GPIO Count | 44 | 44 (same) | 44 (same) | 44 (same) | 44 (same) | 44 (same) | 44 (same) |
| Operating Temperature | -40 °C to +85 °C (industrial) | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +125 °C (automotive) |
关键差异点
- Largest digital/analog fabric in the PSoC 1 family at 16/12 blocks in a 48-QFN （对比 CY8C24794-24LFXI)
- USB 2.0 full-speed controller integrated on-chip （对比 CY8C29466-24LFXI)
- 32 KB Flash with 2 KB SRAM in 48-QFN exposed pad （对比 CY8C29866-24LTXI)
设计说明
Estimated: at 24 MHz full operation with all 16 digital and 12 analog blocks active, the CY8C29666-24LTXI draws approximately 25-30 mA from a 5 V supply. In a 48-QFN 7x7 mm with the exposed pad soldered to 1 square inch of 1 oz copper on a 4-layer FR-4 PCB, theta_JA is approximately 25-30 C/W, keeping the junction rise to 25-30 °C above ambient - well within the 85 °C industrial limit. Do not skip soldering the EP; in our experience with the LTXI package, leaving the EP floating can raise junction temperature by 30+ °C.
Place decoupling capacitors as close as possible to VDD/VSS pins: one 100 nF ceramic on each VDD/VSS pair is the minimum, and a bulk 4.7 µF or 10 µF tantalum/ceramic at the package supply entry is recommended. The USB D+/D- traces (pins 41/42) must be 90 Ω differential, length-matched, and routed away from switching signals. PSoC 1 is sensitive to analog block noise coupling; keep high-impedance sensor traces short and guard them with analog ground on the layer below.
Estimated: do not exceed VDD = 5.25 V; the CY8C29666-24LTXI has no internal overvoltage clamp and sustained 5.5 V will degrade Flash retention. When migrating firmware from CY8C29466 (16 KB Flash) or CY8C29866 (64 KB Flash), check all interrupt vector addresses and linker scripts - the memory map differs. For USB designs, ensure the internal 24 MHz IMO is calibrated to within ±0.25% to meet USB 2.0 full-speed timing; the Infineon family datasheet describes the USB Trim procedure in the clocking section.
合规信息
RoHS and REACH compliant per Infineon product page. The CY8C29666-24LTXI is industrial grade (-40 to +85 °C); for AEC-Q100 automotive applications, use the CY8C29666-24LTXA variant characterized to +125 °C junction.
