CS82C52Z - 5V 16MHz UART with Baud Rate Generator | Renesas
MPN： CS82C52Z ✓ 啟用中CS82C52Z 概覽
A universal asynchronous receiver/transmitter, or UART, is an interface controller that converts parallel processor data into serial characters and converts received serial characters back into parallel data. The CS82C52Z belongs to the UART and serial-interface IC hierarchy, where it sits below microprocessors and above the physical RS232 transceiver stage. Its integrated baud-rate generator reduces the external clock circuitry required to support programmable communication rates.
Key device attributes include a 28-pin PLCC package measuring 11.51 mm by 11.51 mm, a single UART channel, RS232 interface capability, and operation from 5 V. The original Intersil implementation used an advanced 2 µm CMOS process. Distributor records also identify the component as a peripheral UART and baud-rate generator with a 16 MHz maximum clock indication and a Pb-free assembly designation.
The architecture supports programmable asynchronous serial communication in systems where a dedicated general-purpose UART is preferable to implementing the bit-timing state machine in application firmware. Because the baud-rate generator and serial interface share the same IC, designers can reduce component count while retaining clock generation, receive, and transmit functions in one device. RS232 signal levels still require an external line driver or receiver when the board must connect to a physical RS232 port.
Typical uses include industrial control equipment, data acquisition systems, legacy peripheral interfaces, embedded test equipment, and RS232 communication links between a controller and a peripheral module. The CS82C52Z is also suitable for designs that retain older Intersil or Renesas interfaces but need a second source. Any replacement should be checked for identical pin functions, register behavior, interrupt structure, baud-rate generation, and signal-level compatibility rather than package outline alone.
When designing around the CS82C52Z, connect it to a 5 V rail with normal high-speed decoupling and confirm that the external RS232 transceiver operates from the same supply. The PLCC package is not a leaded-through-hole format and requires a suitable surface-mount land pattern and assembly process. Use the manufacturer pin-description table to assign board nets because the package drawing alone does not establish signal direction or handshake functions.
This page combines device specifications, sourcing guidance, drop-in cross-reference findings, application-level design advice, and a parameter-by-parameter comparison to support both legacy maintenance and new design decisions involving the CS82C52Z.
直接替換替代品，適用於 CS82C52Z — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
IS82C52Z96
✅ 直接替換📋 參考替代品（不在目錄中）
IS82C52
✅ 直接替換📋 參考替代品（不在目錄中）
CS82C52Z 規格
| Device Type | UART interface IC with baud-rate generator |
| UART Channels | 1 channel |
| 介面類型 | RS232 |
| 供應電壓 | 5 V |
| 最大時脈頻率 | 16 MHz |
| Technology | 2 µm CMOS |
| 封裝 | 28-pin PLCC |
| Package Body Size | 11.51 mm x 11.51 mm |
| 安裝類型 | Surface mount |
| Manufacturer | Renesas Electronics Corporation |
| Original Manufacturer | Intersil Corporation |
| Product Category | Peripheral UART / BRG |
| Assembly Temperature Grade | A/ANNEAL |
| Lead-Free Status | Pb-free |
| HS Code | 8542390000 |
CS82C52Z 11.51 mm x 11.51 mm 腳位配置指南
CS82C52Z（11.51 mm x 11.51 mm 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： CS82C52Z.
請參閱 資料表 以查看完整腳位配置。
典型應用
CS82C52Z 適用於 6 應用s: Legacy Industrial Controller UART Interface, RS232 Data Acquisition Front End, Embedded Test and Measurement Equipment, Peripheral Maintenance and Retrofit, Point-to-Point Serial Control Link, Service Console and Configuration Interface.
Legacy Industrial Controller UART Interface
The CS82C52Z fits legacy industrial controllers that already communicate through a 5 V UART peripheral and require the established 28-pin PLCC interface. Its single UART channel and integrated baud-rate generator combine serial framing and clock generation in one IC, reducing board space compared with separate logic implementations. Place it beside the controller bus and route its receive and transmit signals to an external RS232 transceiver. The key design benefit is firmware continuity: an existing Intersil-based control board can retain its timing architecture and software flow while obtaining a currently catalogued Renesas source. Qualification should focus on clock timing, interrupt behavior, and temperature limits for the installed enclosure.
推薦
RS232 Data Acquisition Front End
The CS82C52Z can provide the UART and baud-rate timing functions for a data-acquisition front end that communicates with a remote RS232 instrument. The 5 V supply and 16 MHz maximum clock indication align with conventional embedded control logic, while the 28-pin PLCC package provides a defined upgrade path for existing instrumentation. Connect the UART pins to a dedicated RS232 transceiver and include line protection between the transceiver and external connector. Compared with implementing bit timing in firmware, the integrated baud-rate generator releases processing resources for measurement and filtering. Verify framing formats, interrupt latency, and cable-grounding requirements during system integration.
推薦
Embedded Test and Measurement Equipment
The CS82C52Z is suitable for embedded test equipment that requires a dedicated asynchronous serial port alongside a processor or programmable controller. Its integrated baud-rate generator supports predictable serial timing without dedicating additional processor pins to baud-rate division. The 28-pin PLCC footprint is especially valuable for equipment designed around the original Intersil interface because the board and firmware can remain unchanged when qualifying the Renesas catalogued device. Use an external RS232 transceiver at the connector and separate sensitive analog circuitry from the digital UART section. A qualification plan should compare clock tolerance, receive overrun behavior, and interrupt timing against the incumbent device.
推薦
Peripheral Maintenance and Retrofit
The CS82C52Z is a practical choice for repairing or retrofitting legacy peripherals that used the Intersil 82C52 interface. Its 28-pin PLCC package and 5 V operation allow a qualified drop-in assembly to be used where the original footprint, supply rail, and firmware expectations already exist. The documented IS82C52 and IS82C52Z96 replacements provide additional sourcing options for the same functional family. Technicians should verify pin functions, clock source, reset behavior, and handshake wiring before substitution. Because PLCC devices require surface-mount rework equipment, the replacement is most practical in production or repair operations equipped for hot-air rework and fine-pitch inspection.
推薦
Point-to-Point Serial Control Link
The CS82C52Z can serve as the UART endpoint in a point-to-point 5 V control link between two embedded assemblies. The integrated baud-rate generator provides the timing reference while the asynchronous receiver and transmitter handle character conversion. This arrangement is useful in industrial modules that predate Ethernet or USB and retain an established serial protocol. Place the CS82C52Z close to the processor bus, keep the clock routing short, and use an external line driver or transceiver when the link exceeds logic-level distance. The design trade-off is that a legacy UART offers fewer features than modern multifunction serial controllers, so new multi-bus or high-speed requirements favor a different device family.
推薦
Service Console and Configuration Interface
The CS82C52Z can implement a dedicated service or configuration port on industrial equipment that needs a stable serial maintenance channel. A 5 V UART peripheral is simple to isolate on the board and can coexist with a separate processor architecture from the original Intersil design. The PLCC package also allows the same board to support more than one catalogued source during long-life maintenance programs. Route the interface through an RS232 transceiver with appropriate protection, and define the serial framing in both the host service software and embedded firmware. Before deployment, verify the maximum clock condition and complete timing behavior in the system clock domain, particularly when the controller operates across a wide temperature range.
推薦
推薦產品摘要
工程參考資料，適用於 CS82C52Z — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | IS82C52Z96 | IS82C52 |
|---|---|---|---|
| Manufacturer | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | 28-PLCC (11.51 mm x 11.51 mm) | 28-PLCC (11.51 mm x 11.51 mm) | 28-PLCC (11.51 mm x 11.51 mm) |
| Device Type | UART IC with baud-rate generator | UART interface IC with baud-rate generator | UART interface IC with baud-rate generator |
| UART Channels | 1 channel | 1 channel | 1 channel |
| Interface Type | RS232 | RS232 | RS232 |
| Supply Voltage | 5 V | 5 V | 5 V |
| Technology | 2 µm CMOS | CMOS | CMOS |
| Cross-Reference Status | Original catalogued device | Documented as a complete replacement | Documented as a complete replacement |
主要差異化特點
- Single-chip UART and baud-rate generator (對比IS82C52Z96)
- Established 5 V RS232 interface positioning (對比IS82C52)
- Exact 28-pin PLCC footprint continuity (對比IS82C52Z96)
- Low-integration legacy controller solution (對比IS82C52)
設計說明
Design the 28-pin PLCC footprint directly from the manufacturer package drawing, including pad length, width, and toe geometry. PLCC parts are surface-mount devices but do not use the same land pattern as a QFN or fine-pitch BGA. Confirm that the assembly process supports J-leaded PLCC placement and that the connector-side RS232 transceiver is positioned near the board edge to minimize exposed cable-adjacent routing.
Keep the CS82C52Z clock route short and reference it to the same ground plane used by the UART interface. Place the decoupling capacitor adjacent to the device power terminals, and route the serial receive and transmit signals away from switching nodes and clock edges. Although the IC operates at 5 V, the external RS232 transceiver still requires signal conditioning, and any long cable path should include protection components.
Do not treat the UART function as a complete RS232 port. The CS82C52Z performs parallel-to-serial and serial-to-parallel conversion plus baud-rate timing, but a line driver and receiver are still required for physical RS232 voltage levels. Before replacing an original board, verify every terminal, clock polarity, interrupt polarity, handshake function, and reset condition because a matching PLCC outline does not guarantee matching behavior.
Evaluate the power dissipation of the 5 V device using its actual input current and the voltage drop from 5 V to each internal rail. The PLCC package provides more exposed termination area than a small-lead-count package, but thermal performance still depends on copper area and board construction. For legacy systems with uncertain loading, measure junction-temperature rise during maximum receive and transmit activity rather than relying on ambient temperature alone.
合規資訊
The distributor record identifies the CS82C52Z as Pb-free and marked A/ANNEAL. RoHS, REACH, halogen-free, and conflict-minerals statements are not stated in the available product records.