Part A
8535AGI-31LFT
Renesas Electronics, États - Unis
- Lifecycle
- Active
- Stock
- 3663 PCS
- Package
- TSSOP-20
- Series
- Horloge Timing - clock Buffers, Drives
Replacement verdict
Compatible functional replacement candidate
The 8535AGI-31LFT and 8535AG-01LFT are functionally compatible clock fanout buffer ICs from the same 8535 family, sharing identical core specifications including 3.3V supply voltage, 4 differential outputs, LVPECL output type, and 32-pin LQFP package. The 8535AGI-31LFT is rated for the industrial temperature range (-40°C to +85°C), while the 8535AG-01LFT covers the commercial range (0°C to +70°C). The primary distinction is the temperature grade, making the 8535AGI-31LFT a viable functional replacement for the 8535AG-01LFT in most applications, provided the target design does not require the specific commercial-grade temperature characteristics or the 8535AG-01LFT's particular output configuration.
Output Type
High match
Package Type
High match
Supply Voltage
High match
Operating Temperature
Validation required
Parts at a glance
Part B
8535AG-01LFT
Renesas Electronics, États - Unis
- Lifecycle
- Active
- Stock
- 7800 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 | 8535AGI-31LFT | 8535AG-01LFT | Why it matters |
|---|---|---|---|
| Manufacturer | Renesas Electronics America Inc | Renesas Electronics America Inc | Identical manufacturer ensures consistent quality, support, and documentation. |
| Function | Clock Fanout Buffer / Multiplexer | Clock Fanout Buffer / Multiplexer | Same core function allows direct substitution in clock distribution designs. |
| Number of Outputs | 4 | 4 | Matching output count ensures the same number of clock loads can be driven. |
| Input Type | Differential (LVPECL, LVDS, HCSL, etc.) | Differential (LVPECL, LVDS, HCSL, etc.) | Compatible input types allow the same upstream signal sources to be used. |
| Output Type | LVPECL | LVPECL | Identical output signaling ensures downstream receivers remain compatible. |
| Supply Voltage | 3.3 V | 3.3 V | Same supply voltage means no power rail redesign is required. |
| Package / Case | 20-TSSOP | 20-TSSOP | Identical package footprint allows drop-in PCB replacement. |
| Mounting Type | Surface Mount | Surface Mount | Same mounting method ensures compatibility with existing assembly processes. |
| Operating Temperature | -40°C to 85°C | -40°C to 85°C | Matching temperature range ensures both parts work in the same environments. |
| Packaging | Tape & Reel | Tape & Reel | Same packaging supports automated pick-and-place manufacturing. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 8535AGI-31LFT | 8535AG-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 | -40°C ~ 85°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the 8535AGI-31LFT and 8535AG-01LFT?
The 8535AGI-31LFT and 8535AG-01LFT are both 3.3V LVPECL fanout buffers from Renesas (formerly IDT) that distribute one input signal to four differential outputs. They belong to the same 8535 family of clock distribution devices and share the same core function, package footprint, and pinout.
What is the main difference between the 8535AGI-31LFT and 8535AG-01LFT?
The primary difference is the input type. The 8535AG-01LFT accepts a differential LVPECL/ECL input, while the 8535AGI-31LFT is configured for a different input interface as defined by its specific part number option. The "I" in the 8535AGI-31LFT also indicates the industrial temperature range version, whereas the 8535AG-01LFT is specified over the commercial temperature range.
Are the 8535AGI-31LFT and 8535AG-01LFT pin-compatible?
Yes. Both devices are offered in the same 20-pin TSSOP package with an identical pinout. This allows them to share the same PCB land pattern, but electrical and functional differences must still be verified before substitution.
What is the operating temperature range for each device?
The 8535AGI-31LFT is specified for the industrial temperature range of -40°C to +85°C. The 8535AG-01LFT is specified for the commercial temperature range of 0°C to +70°C. The industrial version is required for applications exposed to sub-zero or elevated ambient conditions.
What is the output logic type and supply voltage for these devices?
Both devices provide LVPECL outputs and operate from a 3.3V supply. They are designed for low-skew clock distribution in applications such as networking, computing, and industrial systems requiring differential signaling.
Can the 8535AGI-31LFT and 8535AG-01LFT be used interchangeably?
Not directly. Although they share the same package and pinout, the input configuration and temperature grade differ. The 8535AGI-31LFT supports the industrial temperature range, while the 8535AG-01LFT is limited to commercial temperatures. The input signal type must also match the specific device variant. A substitution requires full validation against the target design requirements and the respective manufacturer datasheets.
What is the function of the 8535AGI-31LFT and 8535AG-01LFT in a clock tree?
Both are 1-to-4 differential fanout buffers used to distribute a single clock or data signal to multiple destinations while maintaining low skew and jitter. They are typically used in clock trees where a low-phase-noise, matched-delay distribution of LVPECL signals is required.