Part A
83940DYILF
Công ty Renesas Electronics America Inc
- Lifecycle
- Active
- Stock
- 3437 PCS
- Package
- LQFP-32
- Series
- Clock-Timing - Clock Buffers, Drivers
Replacement verdict
Compatible functional replacement candidate
The 83940DYILF and 83940DYILFT are functionally equivalent clock fanout buffers from the same manufacturer, sharing identical electrical specifications, package type, and operating temperature range. The only distinction is the packaging format, making the 83940DYILFT a viable direct replacement for the 83940DYILF in most applications.
Function
High match
Package Type
High match
Operating Temperature
High match
Packaging Format
Validation required
Parts at a glance
Part B
83940DYILFT
Công ty Renesas Electronics America Inc
- Lifecycle
- Active
- Stock
- 9688 PCS
- Package
- LQFP-32
- Series
- Clock-Timing - Clock Buffers, Drivers
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 83940DYILF | 83940DYILFT | Why it matters |
|---|---|---|---|
| Manufacturer | Renesas Electronics America Inc | Renesas Electronics America Inc | Identical manufacturer ensures the same design, process, and quality standards, which is essential for functional substitutability. |
| Series | 83940 | 83940 | Same product series indicates shared architecture and feature set, supporting drop-in replacement. |
| Function | Clock Fanout Buffer / Multiplexer | Clock Fanout Buffer / Multiplexer | Matching primary function confirms the parts serve the same role in a clock distribution network. |
| Package / Case | 32-LQFP | 32-LQFP | Identical package footprint allows the parts to be interchanged on the same PCB without layout changes. |
| Mounting Type | Surface Mount | Surface Mount | Same mounting method ensures compatibility with the existing assembly process. |
| Number of Circuits | 1 | 1 | Equal circuit count confirms the same channel capacity for clock fanout. |
| Voltage - Supply | 3.135V ~ 3.465V | 3.135V ~ 3.465V | Matching supply voltage range ensures electrical compatibility with the same power rail. |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | Same temperature range guarantees equivalent environmental performance in the target application. |
| Output Type | LVCMOS, LVTTL | LVCMOS, LVTTL | Identical output logic levels ensure signal compatibility with downstream devices. |
| Packaging | Tray | Tape & Reel (TR) | Different packaging affects handling and assembly; tape and reel is suited for automated pick-and-place production, while tray is often used for prototyping or low-volume runs. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 83940DYILF | 83940DYILFT |
|---|---|---|
| Supplier | - | Renesas Electronics America Inc |
| Part Status | Obsolete | Obsolete |
| Type | Fanout Buffer (Distribution), Multiplexer | Fanout Buffer (Distribution), Multiplexer |
| Number of Circuits | 1 | 1 |
| Ratio - Input: Output | 2:18 | 2:18 |
| Differential - Input: Output | Yes/No | Yes/No |
| Input | CML, LVCMOS, LVPECL, LVTTL, SSTL | CML, LVCMOS, LVPECL, LVTTL, SSTL |
| Output | LVCMOS, LVTTL | LVCMOS, LVTTL |
| Frequency - Max | 250 MHz | 250 MHz |
| Voltage - Supply | 2.375V ~ 3.465V | 2.375V ~ 3.465V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between 83940DYILF and 83940DYILFT?
The 83940DYILF and 83940DYILFT are the same base device from Renesas (formerly IDT). The "T" suffix indicates tape-and-reel packaging, while the non-T version is typically supplied in tubes or trays. Electrical and functional specifications are identical.
Are the 83940DYILF and 83940DYILFT electrically and functionally interchangeable?
Yes. Both part numbers refer to the same silicon and package type. The only documented difference is the shipping packaging format, so they are interchangeable in terms of electrical performance and function.
What is the function of the 83940DYILF/83940DYILFT?
The 83940DYILF and 83940DYILFT are low-skew, low-jitter clock fanout buffers. They distribute one input clock to multiple outputs while maintaining signal integrity for high-speed applications.
What package type do the 83940DYILF and 83940DYILFT use?
Both devices are offered in a 32-pin LQFP package, as indicated by the "LF" suffix in the part number. The package is lead-free and RoHS-compliant.
Can 83940DYILF and 83940DYILFT be used in the same PCB footprint?
Yes. Because both parts use the identical 32-pin LQFP package and pinout, they share the same PCB land pattern and can be used interchangeably on the same board design.
What are the operating voltage and temperature ranges for the 83940DYILF/83940DYILFT?
The devices operate from a 3.3 V supply and are specified for the industrial temperature range of -40°C to +85°C, as denoted by the "I" in the part number.
Which applications are suitable for the 83940DYILF and 83940DYILFT?
These clock fanout buffers are used in networking, telecommunications, and computing systems where low-skew distribution of clock signals to multiple loads is required.
Are the 83940DYILF and 83940DYILFT RoHS compliant?
Yes. Both part numbers carry the "LF" designation, indicating lead-free construction and compliance with RoHS environmental regulations.