CY8C3245LTI-139 PSoC 3 8-Bit 8051 MCU, 50 MHz, 32 KB Flash | Infineon
料号： CY8C3245LTI-139 ✓ 量产中CY8C3245LTI-139 概述
A PSoC, or programmable system-on-chip, is a mixed-signal microcontroller family that combines a conventional embedded CPU core with configurable analog and digital peripheral blocks on the same die. Instead of fixing a set of converters, ADCs, timers and comparators in silicon, PSoC devices let firmware route these functions to nearly any general-purpose I/O pin. This places PSoC above a plain microcontroller and below a full FPGA-plus-MCU combination in the embedded design hierarchy.
Key features of the CY8C3245LTI-139 include 32 KB (32K x 8) of flash program memory, 4 KB of SRAM data memory, 1 KB of data EEPROM, and 8 KB of ECC flash. The device offers dual datapointer DMA channels, 4 flash protection levels, an interrupt system with 27 sources across 8 priority levels, and a single Peripheral Hub Unit with 8 parallel access paths for efficient on-chip data movement. Up to 25 general-purpose I/O pins are available in the 48-QFN package.
Internally, the part is built around a single-core 8051 CPU clocked to 50 MHz with a PSoC 3 configurable analog and digital block architecture. Peripherals such as ADC, DAC, comparators, timers, serial interfaces and the capacitive touch sensing subsystem are allocated by the device configuration tool at build time and then routed to the physical pins, so a design can be re-pin-routed in software rather than respun in hardware. The CY8C32 family is designed to handle dozens of data-acquisition channels and analog inputs on every GPIO.
Typical uses include multichannel sensor acquisition and signal conditioning, industrial control and monitoring modules, keypad and capacitive touch user interfaces, LED and lighting control, low-cost USB-connected accessories, and general-purpose embedded control boards that benefit from a small footprint and a wide supply range.
When designing with the CY8C3245LTI-139, keep the 1.71 V minimum supply in mind when sizing the bypass network, and route the QFN ground pad to a solid ground plane with multiple thermal vias. Because peripherals are assigned to pins at configuration time, fix the pin map early and re-validate it after any board respin. Programming and configuration are handled with the vendor's device configuration utility and the 8051 tool chain.
This page brings together the Infineon part parameters, package and pinout references, drop-in family alternatives, and practical design guidance that engineers normally have to assemble from datasheets, application notes and distributor listings.
直接替换替代料： CY8C3245LTI-139 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： CY8C3245LTI-139 （相同外形与封装尺寸） ——差异在于 Mounting Type, Package, Product Type.
CY8C3245LTI-139T
✅ 直接替换📋 参考替代料（不在目录中）
CY8C3245LTI-123
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
CY8C3247LTI-123
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
CY8C3244LTI-123
✅ 直接替换📋 参考替代料（不在目录中）
CY8C3245LTI-120
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
CY8C3245LTI-139 最大额定值与电气特性
| Product Type | 8-bit 8051 microcontroller (PSoC 3 programmable system-on-chip) |
| CPU Core | Single-core 8051, 8-bit CISC |
| Maximum CPU Frequency | 50 MHz |
| Flash Memory | 32 KB (32K x 8) |
| SRAM | 4 KB |
| Data EEPROM | 1 KB |
| ECC Flash | 8 KB |
| Supply Voltage Range | 1.71 V to 5.5 V |
| General-Purpose I/O Pins | 25 |
| 封装 | 48-QFN (7 x 7 mm), no-lead |
| Number of Terminals | 48 |
| Package Code | HVQCCN |
| Package Shape | Square |
| 安装类型 | Surface Mount (SMD) |
| Temperature Grade | Industrial |
| Interrupt System | 27 sources, 8 priority levels |
| Peripheral Hub Unit (PHUB) | 1 PHub with 8 parallel access paths |
| Data Pointers | Dual datapointer |
| Flash Protection Levels | 4 |
| Manufacturer | Infineon Technologies (Cypress PSoC 3 family) |
CY8C3245LTI-139 square 引脚配置指南
CY8C3245LTI-139（square 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： CY8C3245LTI-139.
请参阅 数据手册 以查看完整引脚配置。
典型应用
CY8C3245LTI-139 适用于 6 应用s: Multichannel Sensor Acquisition and Signal Conditioning, Industrial Control and Monitoring Module, Capacitive Touch Keypad and Human Interface, LED and Lighting Control, USB-Connected Peripheral and Dongle, Low-Cost Consumer and Appliance Controller.
Multichannel Sensor Acquisition and Signal Conditioning
The CY8C3245LTI-139 suits designs that read many analog sensors in a compact footprint, because the PSoC 3 configurable analog blocks can be routed to nearly any GPIO pin, as the CY8C32 family documentation describes. With 25 general-purpose I/O available in the 48-QFN (7 x 7 mm) package and dual datapointer channels moving samples independently of the CPU, a board can host dozens of acquisition channels without an external ADC. The 1.71 V to 5.5 V supply range lets the same design run from a 3.3 V sensor rail or a 5 V industrial bus, while 4 KB of SRAM buffers incoming frames.
推荐
Industrial Control and Monitoring Module
For industrial monitoring boards, the CY8C3245LTI-139 combines an 8051 core running to 50 MHz with programmable digital blocks that can act as timers, counters or serial interface blocks without fixed pin assignments. The 27-source interrupt system with 8 priority levels allows fast response to machine or fault events, while the Peripheral Hub Unit with 8 parallel access paths keeps on-chip data movement efficient. Operating from 1.71 V to 5.5 V in the industrial temperature grade makes it a fit for 24 V bus systems that regulate down to 3.3 V on board.
推荐
Capacitive Touch Keypad and Human Interface
The PSoC 3 touch-sensing subsystem in the CY8C3245LTI-139 supports capacitive buttons and sliders implemented on the same GPIO pins as other functions, which removes the need for a separate touch controller IC. Because peripheral routing is fixed at configuration time, a designer can reassign touch channels or add analog functions on the same board by changing the device configuration rather than respinning the PCB. The 48-QFN (7 x 7 mm) package and 25 I/O pins keep the controller compact enough for panel-mounted keypads, appliance control panels and access terminals.
推荐
LED and Lighting Control
The CY8C3245LTI-139 can drive multi-channel lighting with the configurable digital blocks providing PWM-capable timers and comparators, and its analog blocks allow current-sense feedback on the same device. The wide 1.71 V to 5.5 V operating range accommodates both 3.3 V logic-side designs and 5 V driver stages. With 32 KB of flash and 4 KB of SRAM there is ample room for dimming tables, effect sequences and field-updatable lighting profiles, and the 48-QFN footprint keeps the controller small inside compact luminaires.
推荐
USB-Connected Peripheral and Dongle
The CY8C32 family is designed to handle USB connectivity alongside other peripherals, and the CY8C3245LTI-139 provides the 8051 core, flash and SRAM needed for a compact USB-connected accessory or configuration dongle. Its configurable peripherals can be assigned to carry UART, SPI and I2C traffic to sensors and memories without a bridge IC, and the 32 KB of flash accommodates a USB stack plus application firmware. The 48-QFN (7 x 7 mm) package supports the small board area typical of dongle and inline connector products.
推荐
Low-Cost Consumer and Appliance Controller
For appliance and consumer products, the CY8C3245LTI-139 integrates motor or valve control, sensing and logic in one device, replacing an MCU plus discrete analog front end. Its wide supply range covers 1.8 V to 5 V designs, and the 8 KB of ECC flash plus 4 flash protection levels help protect firmware in cost-sensitive consumer programs. With 25 I/O pins and programmable peripheral routing, the same board revision can serve several appliance variants by changing the device configuration rather than the layout.
推荐
推荐产品汇总
工程参考数据： CY8C3245LTI-139 ——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 | CY8C3245LTI-139T | CY8C3245LTI-123 | CY8C3247LTI-123 | CY8C3244LTI-123 | CY8C3245LTI-120 |
|---|---|---|---|---|---|---|
| Package | 48-QFN (7x7) | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-QFN (7x7) - same |
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| CPU Core | 8-bit 8051, up to 50 MHz | 8-bit 8051, up to 50 MHz | 8-bit 8051, up to 50 MHz | 8-bit 8051, up to 50 MHz | 8-bit 8051, up to 50 MHz | 8-bit 8051, up to 50 MHz |
关键差异点
- Identical electrical drop-in with a different packing format （对比 CY8C3245LTI-139T)
- More program memory headroom in the same footprint （对比 CY8C3247LTI-123)
- Doubled flash versus the lower-memory family member （对比 CY8C3244LTI-123)
设计说明
The CY8C3245LTI-139 works down to 1.71 V, so the bypass network is on the critical path for low-voltage designs. Place a 100 nF ceramic capacitor at each supply pin directly at the package, with a 1 uF to 4.7 uF bulk capacitor close to the regulator feeding the 48-QFN. Keep the supply loop area minimal by connecting the ground-side of the ceramics to the same ground plane region as the exposed pad. Deriving the operating point from a 5 V rail with an LDO also keeps the part inside its 5.5 V maximum while preserving headroom for transients.
Estimated: with the 48-QFN exposed pad tied to a solid ground pour and 25 I/O switching at moderate edge rates, junction rise depends on the copper area available. A common first-order rule of thumb is roughly 1 square inch of copper for every 1 W of dissipation when the pad is stitched with thermal vias to an inner plane. Keep the pad-to-plane connection made with a full array of vias rather than a single connection, and verify with a thermal simulation for your actual switching activity and ambient range.
PSoC peripherals are assigned to pins by the device configuration utility at build time, so pin assignment must be frozen before routing the board. Generate the pin map first, then route the analog-capable pins away from switching nodes and clocks. Because the analog and digital blocks share the same fabric, keep the ground reference for analog inputs close to the device ground pins and reserve a quiet region on the board for the analog section. Re-run the configuration check after every board revision, because a pin move can invalidate the routing you already committed.
Two mistakes recur on PSoC 3 designs. First, substituting the -139T tape-and-reel part for a tray-packed prototype assembly without confirming the pick-and-place pattern and reel orientation. Second, underestimating flash: 32 KB includes the bootloader and the configured analog/digital block code, so a 8051 project that appears to fit in 28 KB of application code can overflow once the library and configuration data are linked. Check the build size report from the tool chain before freezing the release.
合规信息
The Infineon part page lists the CY8C3245LTI-139 as an active PSoC 3 CY8C32 family device in a lead-free no-lead 48-QFN package. Explicit RoHS, REACH, AEC-Q100 and halogen-free statements are not published on the product page and are therefore recorded as unknown.
