Part A
8535AGI-31LFT
Renesas Electronics America Inc.
- Lifecycle
- Active
- Stock
- 3663 PCS
- Package
- TSSOP-20
- Series
- Horário-Horário - Clock Buffers, Drivers
Replacement verdict
Compatible functional replacement candidate
The 8535AGI-31LFT and 8535AGI-01LF are functionally compatible clock fanout buffers from the same 8535 family, sharing identical package, pinout, supply voltage, and output type. The primary distinction lies in the output frequency capability, where the 8535AGI-31LFT supports a higher maximum output frequency than the 8535AGI-01LF. Designers should verify that the system timing margin accommodates the frequency difference before substituting. In applications where the lower frequency limit of the 8535AGI-01LF is sufficient, the 8535AGI-31LFT can serve as a drop-in replacement without layout changes.
Output Type
High match
Package Type
High match
Supply Voltage
High match
Maximum Output Frequency
Validation required
Parts at a glance
Part B
8535AGI-01LF
Renesas Electronics America Inc.
- Lifecycle
- Active
- Stock
- 2472 PCS
- Package
- TSSOP-20
- Series
- Horário-Horário - 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 | 8535AGI-31LFT | 8535AGI-01LF | Why it matters |
|---|---|---|---|
| Manufacturer | Renesas Electronics America Inc | Renesas Electronics America Inc | Identical manufacturer ensures consistent quality, support, and documentation. |
| Series | 8535 | 8535 | Same series indicates shared architecture and similar functional characteristics. |
| Package / Case | 20-TSSOP | 20-TSSOP | Identical package allows drop-in replacement on the same PCB footprint. |
| Mounting Type | Surface Mount | Surface Mount | Same mounting method ensures compatibility with existing assembly processes. |
| Number of Circuits | 1 | 1 | Matching circuit count is essential for equivalent clock distribution functionality. |
| Input Type | LVCMOS, LVTTL | LVCMOS, LVTTL | Same input compatibility ensures the device interfaces with the same logic levels. |
| Output Type | LVCMOS, LVTTL | LVCMOS, LVTTL | Identical output type guarantees downstream devices receive compatible signals. |
| Voltage - Supply | 3.135V ~ 3.465V | 3.135V ~ 3.465V | Same supply range ensures operation within the same power rail design. |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | Identical temperature range confirms suitability for the same environmental conditions. |
| Frequency - Max | 250 MHz | 250 MHz | Same maximum frequency ensures equivalent timing performance in the target application. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 8535AGI-31LFT | 8535AGI-01LF |
|---|---|---|
| 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 | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the 8535AGI-31LFT and 8535AGI-01LF?
The 8535AGI-31LFT and 8535AGI-01LF are clock generators from Renesas (formerly IDT) belonging to the 8535 series of low-jitter clock synthesizers. Both are offered in the same 20-pin TSSOP package and are used to generate high-frequency clock outputs for networking, telecom, and computing applications.
What is the main difference between the 8535AGI-31LFT and the 8535AGI-01LF?
The primary difference is the factory-configured output frequency and internal PLL configuration. The 8535AGI-31LF is configured for a specific output frequency set, while the 8535AGI-01LF is configured for a different output frequency set. The suffix after the dash indicates the specific configuration variant. Both share the same package, pinout, and electrical interface.
Are the 8535AGI-31LFT and 8535AGI-01LF pin-to-pin compatible?
Yes. Both devices are housed in the same 20-pin TSSOP package and share the same pinout. This means they are pin-to-pin compatible at the package level, but the output frequencies and PLL settings differ, so they are not functionally interchangeable without verifying the required output frequency for the target design.
Can the 8535AGI-31LFT be used as a drop-in replacement for the 8535AGI-01LF?
No, not as a direct drop-in replacement. Although they are pin-compatible, the two variants are factory-programmed for different output frequencies. Substituting one for the other will result in incorrect clock frequencies unless the system design can accommodate the different output frequency or the device is reprogrammed, which is not possible for these factory-configured parts.
What is the operating temperature range for these devices?
Both the 8535AGI-31LFT and 8535AGI-01LF are specified for the industrial temperature range of -40°C to +85°C, as indicated by the "I" in the part number. This makes them suitable for industrial and networking equipment applications.
What is the package type and pin count for these clock generators?
Both devices are packaged in a 20-pin TSSOP (Thin Shrink Small Outline Package). The "LF" suffix indicates the devices are supplied in tape and reel packaging and are RoHS-compliant.
What supply voltage do the 8535AGI-31LFT and 8535AGI-01LF require?
Both devices operate from a 3.3V nominal supply voltage. The 8535 series is designed for 3.3V operation with a specified supply voltage range as detailed in the manufacturer datasheet. Designers should consult the official Renesas datasheet for the exact recommended operating conditions.
Are these devices RoHS compliant and lead-free?
Yes. The "LF" suffix in both part numbers indicates that the devices are RoHS-compliant and lead-free, in accordance with current environmental regulations for electronic components.