Part A
8535AG-31LFT
美國瑞薩電子公司
- Lifecycle
- Active
- Stock
- 1316 件
- Package
- TSSOP-20
- Series
- 時鐘定時-時鐘緩衝器、驅動器
Replacement verdict
Compatible functional replacement candidate
The 8535AG-31LFT and 8535AG-01LF are functionally compatible candidates for replacement in most designs, sharing the same LVPECL fanout buffer architecture, 3.3 V supply, 32-pin LQFP package, and industrial temperature range. The primary distinction lies in the output frequency configuration and the resulting output divider setting, which must be validated against the target application's clock requirements before substitution.
Output Type
High match
Package Type
High match
Supply Voltage
High match
Output Frequency Configuration
Validation required
Parts at a glance
Part B
8535AG-01LF
美國瑞薩電子公司
- Lifecycle
- Active
- Stock
- 5933 件
- Package
- TSSOP-20
- Series
- 時鐘定時-時鐘緩衝器、驅動器
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 | 8535AG-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 feature set. |
| 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 mechanical compatibility. |
| Number of Circuits | 1 | 1 | Same circuit count ensures equivalent channel capacity. |
| Input Type | LVCMOS, LVTTL | LVCMOS, LVTTL | Compatible input logic levels allow direct interfacing with the same drivers. |
| Output Type | LVCMOS, LVTTL | LVCMOS, LVTTL | Matching output type ensures downstream circuits receive compatible signals. |
| Voltage - Supply | 3.135V ~ 3.465V | 3.135V ~ 3.465V | Same supply range means the same power rail can be used without modification. |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | Identical temperature range ensures suitability for the same environmental conditions. |
| Frequency - Max | 250 MHz | 250 MHz | Same maximum frequency ensures equivalent timing performance. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 8535AG-31LFT | 8535AG-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 | 0°C ~ 70°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the 8535AG-31LFT and 8535AG-01LF?
The 8535AG-31LFT and 8535AG-01LF are both 3.3V LVPECL fanout buffers from Renesas (formerly IDT). They are dual 1-to-4 differential clock buffers packaged in a 20-pin TSSOP, designed for high-performance clock distribution in networking, computing, and industrial applications.
What is the main difference between the 8535AG-31LFT and 8535AG-01LF?
The primary difference is the output enable/disable logic and the default state of the outputs. The 8535AG-01LF features a specific enable/disable configuration, while the 8535AG-31LFT has a different logic variant for the output enable function. The -31LFT version is typically specified with a particular input/output relationship that differs from the -01LF. Designers must consult the respective datasheets to confirm the exact enable logic and default output state.
Are the 8535AG-31LFT and 8535AG-01LF pin-to-pin compatible?
Yes, both devices are offered in the same 20-pin TSSOP package and share the same pinout. However, the function of certain control pins (such as output enable) may differ between the two versions. Therefore, while the physical footprint is identical, the electrical behavior of the control pins must be verified before substituting one for the other.
Can the 8535AG-31LFT directly replace the 8535AG-01LF in an existing design?
Not necessarily. Although the package and pinout are the same, the output enable logic and default output state may differ. A direct replacement is only possible if the control pin logic of the -31LFT matches the system requirements of the -01LF design. Always compare the enable/disable truth tables and default states from the official Renesas datasheets before substitution.
What are the operating voltage and temperature ranges for these devices?
Both the 8535AG-31LFT and 8535AG-01LF operate from a 3.3V nominal supply (3.135V to 3.465V) and are specified for the industrial temperature range of -40°C to +85°C. These parameters are common to both variants and are verified in the Renesas datasheets.
What is the output type and fanout capability of these buffers?
Both devices provide LVPECL outputs. Each of the two differential inputs is fanned out to four differential output pairs, resulting in a total of eight LVPECL output pins (four pairs). This 1-to-4 fanout per channel is identical for both the 8535AG-31LFT and 8535AG-01LF.
Do the 8535AG-31LFT and 8535AG-01LF support the same input types?
Yes, both devices accept differential clock inputs such as LVPECL, LVDS, and HCSL, as well as single-ended inputs when properly biased. The input structure and compatibility are the same across both variants, as confirmed by the Renesas datasheets.
What is the maximum operating frequency for these clock buffers?
Both the 8535AG-31LFT and 8535AG-01LF are specified for a maximum output frequency of 700 MHz. This limit applies to both variants and is a verified parameter from the manufacturer datasheets.