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Product Detailed Parameters
- Description：IC CLK BUFFER 1:8 80MHZ 20SOIC
- Series：-
- Package：Tape & Reel (TR),Bulk
- Mfr：Texas Instruments
- Type：Fanout Buffer (Distribution)
- Number of Circuits：1
- Ratio - Input:Output：1:08
- Differential - Input:Output：No/No
- Input：TTL
- Output：TTL
- Frequency - Max：80 MHz
- Voltage - Supply：4.75V ~ 5.25V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：20-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：20-SOIC
- Grade：-
- Qualification：-
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Overview
The CDC339DWR is a single-circuit fanout buffer manufactured by Texas Instruments, designed for clock distribution in high-speed digital systems. It provides an 8:1 output ratio from a single TTL input to eight TTL outputs. The device operates within a supply voltage range of 4.75V to 5.25V and supports maximum frequencies up to 80 MHz. It is housed in a 20-SOIC package with a width of 7.50mm and functions reliably across an operating temperature range of -40°C to +85°C.
Feature Summary
- Single circuit configuration providing 1:8 fanout capability
- Maximum operating frequency of 80 MHz
- TTL-compatible input and output logic levels
- Surface mount packaging in a 20-SOIC case
Applications
- Clock signal distribution in synchronous digital systems
- Control signal routing in high-speed data processing equipment
- Fanout buffering for system timing networks
Procurement Notes
This component is identified as obsolete or not recommended for new designs. Verification of current availability requires checking authorized distributors for surplus stock or alternative sourcing channels. Ensure the specific TR (Tape & Reel) packaging variant matches production requirements when sourcing replacement units.
Selection Notes
Select this part for applications requiring a single 1:8 fanout buffer with TTL compatibility and operation at 5V nominal supply. Verify that the 80 MHz frequency limit meets system timing requirements. Consider the 20-SOIC footprint constraints during PCB layout. Check for newer generation replacements if long-term supply assurance is critical.
Part Context
The CDC339DWR belongs to the CDC339 family of clock buffers. The 'DW' suffix indicates the 20-SOIC package type, while 'R' denotes the Tape & Reel packaging format. This specific variant is part of Texas Instruments' legacy portfolio of high-speed logic components used for clock distribution.
Replacement Considerations
The CDC339DW is listed as a parameter-equivalent alternative. Verify pinout compatibility and electrical specifications before substitution.
