Part A
8535AG-31LFT
Renesas Electronics, États - Unis
- Lifecycle
- Active
- Stock
- 1316 PCS
- Package
- TSSOP-20
- Series
- Horloge Timing - clock Buffers, Drives
Replacement verdict
Compatible functional replacement candidate
The 8535AG-31LFT and 8535AGI-01LFT are functionally compatible clock fanout buffers with matching logic type, supply voltage, and package footprint, differing primarily in output frequency capability and operating temperature range. The 8535AGI-01LFT offers a higher maximum output frequency and an extended industrial temperature range, making it a viable replacement for the 8535AG-31LFT in most applications, provided the target design does not require the lower frequency variant's specific configuration.
Output Type
High match
Supply Voltage
High match
Maximum Output Frequency
Validation required
Operating Temperature Range
Validation required
Parts at a glance
Part B
8535AGI-01LFT
Renesas Electronics, États - Unis
- Lifecycle
- Active
- Stock
- 2527 PCS
- Package
- TSSOP-20
- Series
- Horloge Timing - clock Buffers, Drives
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 8535AG-31LFT | 8535AGI-01LFT | Why it matters |
|---|---|---|---|
| Manufacturer Part Number | 8535AG-31LFT | 8535AGI-01LFT | Identifies the exact orderable variant; the -31 and -01 suffixes denote different device configurations and cannot be treated as interchangeable. |
| Function / Device Type | Clock fanout buffer / clock distribution | Clock generator / clock synthesizer | A buffer distributes an existing clock, while a generator synthesizes clocks from a reference; these are functionally different roles and are not drop-in substitutes. |
| Input Type | Differential clock input (e.g., LVPECL/LVDS/HCSL/CML) | Crystal or reference clock input | The input interface determines what source signal the device can accept, directly affecting board-level compatibility. |
| Output Type | LVPECL | LVPECL | Output logic level must match the receiving device's input requirements for reliable signal integrity. |
| Number of Outputs | 4 | 4 | Output count determines how many loads can be driven without additional buffering. |
| Supply Voltage | 3.3 V | 3.3 V | Supply voltage must match the system rail; a mismatch can damage the device or prevent proper operation. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | The temperature range defines the environments in which the part can be reliably used; industrial and commercial grades differ. |
| Package / Case | TSSOP-20 | TSSOP-20 | Package footprint and pinout must match the PCB layout for physical and electrical compatibility. |
| Packaging | Tape & Reel | Tape & Reel | Packaging form affects assembly line handling and reflow processes; both being tape and reel supports automated placement. |
| RoHS Compliance | RoHS compliant | RoHS compliant | RoHS status is required for regulatory compliance in many markets and affects solderability and material declarations. |
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 | 8535AG-31LFT | 8535AGI-01LFT |
|---|---|---|
| Supplier | - | Renesas Electronics America Inc |
| Part Status | Active | Active |
| Type | Fanout Buffer (Distribution), Multiplexer | Fanout Buffer (Distribution), Multiplexer |
| Number of Circuits | 1 | 1 |
| Ratio - Input: Output | 2:4 | 2:4 |
| Differential - Input: Output | No/Yes | No/Yes |
| Input | LVCMOS, LVTTL, Crystal | LVCMOS, LVTTL |
| Output | LVPECL | LVPECL |
| Frequency - Max | 266 MHz | 266 MHz |
| Voltage - Supply | 3.135V ~ 3.465V | 3.135V ~ 3.465V |
| Operating Temperature | 0°C ~ 70°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the 8535AG-31LFT and 8535AGI-01LFT?
Both are clock generators from Renesas (formerly IDT) in the 8535 series. The 8535AG-31LFT and 8535AGI-01LFT are zero-delay clock buffers/generators designed for high-performance clock distribution in networking, computing, and industrial applications. They are functionally similar but differ in temperature grade and configuration options.
What is the difference between the 8535AG-31LFT and 8535AGI-01LFT?
The primary difference is the operating temperature range and the specific configuration. The 8535AG-31LFT is specified for the commercial temperature range (0°C to +70°C), while the 8535AGI-01LFT is specified for the industrial temperature range (-40°C to +85°C). The "I" in the part number indicates industrial temperature grade. Additionally, the "-01" suffix denotes a specific configuration variant, which may affect output frequency or input selection.
Are the 8535AG-31LFT and 8535AGI-01LFT pin-compatible?
Yes, both devices are offered in the same 20-pin TSSOP package (5.0mm body width) and share the same pinout. This allows for a direct PCB layout replacement, provided the temperature grade and configuration differences are acceptable for the application.
Can the 8535AG-31LFT be used as a drop-in replacement for the 8535AGI-01LFT?
Not directly without validation. While they are pin-compatible, the 8535AG-31LFT has a narrower commercial temperature range (0°C to +70°C) compared to the industrial range (-40°C to +85°C) of the 8535AGI-01LFT. Additionally, the "-01" configuration variant may have different output frequency settings or input selection logic. The system design must be verified against the specific datasheet for each part.
What is the maximum output frequency of these clock generators?
Both the 8535AG-31LFT and 8535AGI-01LFT support output frequencies up to 250 MHz, depending on the input reference and configuration. This makes them suitable for high-speed clock distribution in Gigabit Ethernet, PCI Express, and other high-frequency applications.
What is the supply voltage range for the 8535AG-31LFT and 8535AGI-01LFT?
Both devices operate from a 3.3V nominal supply voltage, with a specified range of 3.135V to 3.465V. This is standard for LVCMOS/LVTTL-compatible clock generators in the 8535 series.
What are the typical applications for these clock generators?
Typical applications include network switches, routers, storage area networks (SANs), servers, and industrial control systems. They are used for clock generation, frequency translation, and zero-delay buffering in systems requiring low jitter and high fanout.
What is the output type of the 8535AG-31LFT and 8535AGI-01LFT?
Both devices provide LVCMOS/LVTTL-compatible outputs. They are designed to drive standard digital logic inputs and can be configured for multiple output frequencies via external control pins or programming.
Are these parts RoHS compliant?
Yes, both the 8535AG-31LFT and 8535AGI-01LFT are RoHS-compliant and lead-free, as indicated by the "LF" suffix in the part number. They are suitable for use in environmentally regulated products.