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LC4256ZE-5TN144C
Electronics Part Number
LC4256ZE-5TN144C-WXManufacturer
Skyworks Solutions
LC4256ZE-5TN144C
Description
CPLD, 256 Macrocells, 5.8ns, 144-TQFPInventory
213 Pcs New Original In Stock
"Embedded ICs: compact, reliable, high-performance. Integrated functionality reduces BOM cost. For consumer and industrial electronics.",
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Basic cost: USD 70.00
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Technical Specifications
Category
Interface, Modems - ICs and Modules
Manufacturer
Skyworks Solutions
Packaging
Tube
Mounting Type
Surface Mount
Package / Case
16-SOIC (0.154", 3.90mm Width)
Series
-
Base Product Number
SI2434
Product Status
Obsolete
Voltage - Supply
3.3V
Supplier Device Package
16-SOIC
Data Format
V.34
Baud Rates
-
Data Sheet Document (D)
Datasheets
Download SI2434-C-FS Product Specification (PDF)
HTML Datasheet
SI2434-C-FS-DG
Environmental & Export Classification
Moisture Sensitivity Level (MSL)
3 (168 Hours)
ECCN
5A991B2
HTSUS
8542.39.0001
Additional Information
Other Names
-SI2434-C
Standard Package
48
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the SI2434-C-FS in a new product given its obsolete stat
Using the SI2434-C-FS in new designs carries significant supply chain and long-term reliability risks due to its obsolete status. While 2100 units are available as new original stock, future availability is not guaranteed, which can disrupt production and end-of-life planning. Engineers should evaluate last-time buy options and prioritize redesigning with active parts like the SI2434-D-FS or alternative V.34 modems. If proceeding, implement strict inventory buffering and consider conformal coating or protective packaging to extend field life, especially in harsh environments.
Can the SI2434-C-FS be used as a drop-in replacement for the SI2434-D-FS, and what compatibility iss
The SI2434-C-FS is not a guaranteed drop-in replacement for the SI2434-D-FS despite similar functionality and package (16-SOIC). Differences in firmware, voltage tolerance, or internal register mapping may exist due to revisions between variants. Designers must verify timing, power sequencing, and control signal levels match datasheet requirements for each variant. Always perform interoperability testing with connected host processors and line drivers. Prioritize reviewing Skyworks' revision notes or contacting authorized distributors for cross-reference guidance before substitution.
How does the 3.3V supply constraint of the SI2434-C-FS affect integration with legacy 5V microcontro
The SI2434-C-FS operates strictly at 3.3V, creating level-shifting challenges when interfacing with 5V microcontrollers or legacy UART peripherals. Direct connection risks damage or unreliable communication. Use bidirectional level shifters (e.g., TXS0108E) or series resistors with clamping diodes on control and data lines to prevent overvoltage. Ensure signal rise/fall times remain within acceptable limits after translation to maintain reliable modem handshaking and V.34 data integrity.
What thermal and PCB layout considerations are critical for reliable SI2434-C-FS performance in high
For reliable operation of the SI2434-C-FS in high-density designs, maintain adequate copper pour for thermal dissipation and follow MSL 3 handling guidelines with a 168-hour floor life. Use thermal relief on ground pins and ensure uniform solder stencil apertures to avoid tombstoning. Keep analog signal paths (e.g., line driver outputs) short and away from high-speed digital traces to minimize noise coupling. Stagger reflow profiles to avoid thermal shock, especially given the component's obsolete status and potential aging from long-term storage.
What are the reliability implications of using SI2434-C-FS in industrial environments with extended
The SI2434-C-FS, packaged in 16-SOIC, lacks extended temperature or hermetic sealing, making it vulnerable in harsh industrial environments. Its MSL 3 rating indicates sensitivity to moisture during assembly, necessitating controlled storage and reflow within 168 hours of exposure. Post-assembly, conformal coating or potting is recommended to mitigate corrosion and thermal cycling fatigue. Monitor field failure rates closely, especially if operating near ambient extremes, and design in redundancy or remote diagnostics due to unavailability of long-term replacement options.
What are the key design-in risks when using the SI2434-C-FS in a new product given its obsolete stat
Using the SI2434-C-FS in new designs carries significant supply chain and long-term reliability risks due to its obsolete status. While 2100 units are available as new original stock, future availability is not guaranteed, which can disrupt production and end-of-life planning. Engineers should evaluate last-time buy options and prioritize redesigning with active parts like the SI2434-D-FS or alternative V.34 modems. If proceeding, implement strict inventory buffering and consider conformal coating or protective packaging to extend field life, especially in harsh environments.
Can the SI2434-C-FS be used as a drop-in replacement for the SI2434-D-FS, and what compatibility iss
The SI2434-C-FS is not a guaranteed drop-in replacement for the SI2434-D-FS despite similar functionality and package (16-SOIC). Differences in firmware, voltage tolerance, or internal register mapping may exist due to revisions between variants. Designers must verify timing, power sequencing, and control signal levels match datasheet requirements for each variant. Always perform interoperability testing with connected host processors and line drivers. Prioritize reviewing Skyworks' revision notes or contacting authorized distributors for cross-reference guidance before substitution.
How does the 3.3V supply constraint of the SI2434-C-FS affect integration with legacy 5V microcontro
The SI2434-C-FS operates strictly at 3.3V, creating level-shifting challenges when interfacing with 5V microcontrollers or legacy UART peripherals. Direct connection risks damage or unreliable communication. Use bidirectional level shifters (e.g., TXS0108E) or series resistors with clamping diodes on control and data lines to prevent overvoltage. Ensure signal rise/fall times remain within acceptable limits after translation to maintain reliable modem handshaking and V.34 data integrity.
What thermal and PCB layout considerations are critical for reliable SI2434-C-FS performance in high
For reliable operation of the SI2434-C-FS in high-density designs, maintain adequate copper pour for thermal dissipation and follow MSL 3 handling guidelines with a 168-hour floor life. Use thermal relief on ground pins and ensure uniform solder stencil apertures to avoid tombstoning. Keep analog signal paths (e.g., line driver outputs) short and away from high-speed digital traces to minimize noise coupling. Stagger reflow profiles to avoid thermal shock, especially given the component's obsolete status and potential aging from long-term storage.
What are the reliability implications of using SI2434-C-FS in industrial environments with extended
The SI2434-C-FS, packaged in 16-SOIC, lacks extended temperature or hermetic sealing, making it vulnerable in harsh industrial environments. Its MSL 3 rating indicates sensitivity to moisture during assembly, necessitating controlled storage and reflow within 168 hours of exposure. Post-assembly, conformal coating or potting is recommended to mitigate corrosion and thermal cycling fatigue. Monitor field failure rates closely, especially if operating near ambient extremes, and design in redundancy or remote diagnostics due to unavailability of long-term replacement options.
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Sep 15 2026
