FD4000136 Equivalent & Substitute Parts

Part Overview

The FD4000136 is a 40 MHz XO (Standard) CMOS oscillator manufactured by Diodes Incorporated, part of the SaRonix-eCera™ FD series. This surface mount crystal oscillator operates at 1.8V with enable/disable functionality and is designed for applications requiring stable frequency generation in compact form factors. The device is currently in active production status with 994 units in stock. Alternative components become necessary when addressing supply chain constraints, specific compliance requirements, or operational parameter variations across different application environments.

Substiute Parts

FD4000136

Diodes IncorporatedIn Stock: 1011FD4000136 Datasheet

Current PartRFQ

AC-40.000MDE-T

TXC CORPORATIONIn Stock: 864AC-40.000MDE-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FD4000136 is determined by strict alignment of core electrical and mechanical parameters. The following criteria establish valid equivalency:

Primary Substitution Criteria:

• Frequency: 40 MHz (exact match required)
• Output Configuration: CMOS
• Supply Voltage: 1.8V
• Enable/Disable Function: Required
• Package: 4-SMD, No Lead
• Physical Footprint: 5.00mm x 3.20mm (length x width)
• Mounting: Surface Mount

The AC-40.000MDE-T from TXC CORPORATION meets all primary substitution criteria. Both components share identical frequency, output type, supply voltage, functional capability, and mechanical compatibility. Variations in secondary parameters such as frequency stability, operating temperature range, and supply current do not preclude substitution when the primary criteria are satisfied.

Parameter Comparison

Engineering Selection Recommendations

Both the FD4000136 and AC-40.000MDE-T are active production components with full RoHS compliance and MSL 1 rating, indicating equivalent environmental handling and regulatory standing. The AC-40.000MDE-T provides extended operating temperature coverage (-40°C to 85°C versus -20°C to 70°C) and reduced maximum supply current (20mA versus 25mA), which may offer advantages in temperature-critical or power-constrained applications. The FD4000136 delivers tighter frequency stability (±20ppm versus ±50ppm), which is relevant for applications with stringent timing requirements. Selection between these components should be based on specific application requirements regarding temperature range, frequency accuracy, and power consumption constraints. Both components are mechanically and electrically compatible for direct substitution in 40 MHz CMOS oscillator applications requiring 1.8V supply and enable/disable control.

Frequently Asked Questions (FAQ)

Q: Can the AC-40.000MDE-T directly replace the FD4000136 on a PCB?

A: Yes. Both components share identical package type (4-SMD, No Lead), physical footprint (5.00mm x 3.20mm), and mounting configuration (surface mount). The AC-40.000MDE-T has a maximum seated height of 1.40mm compared to 1.30mm for the FD4000136, which remains within typical PCB assembly tolerances. Electrical compatibility is confirmed through matching frequency (40 MHz), output type (CMOS), supply voltage (1.8V), and enable/disable functionality.

Q: What are the key differences between these two oscillators?

A: The primary differences are frequency stability (FD4000136: ±20ppm; AC-40.000MDE-T: ±50ppm), operating temperature range (FD4000136: -20°C to 70°C; AC-40.000MDE-T: -40°C to 85°C), and maximum supply current (FD4000136: 25mA; AC-40.000MDE-T: 20mA). Both maintain identical core specifications for frequency, voltage, output type, and package configuration.

Q: Which component should I select for temperature-critical applications?

A: The AC-40.000MDE-T supports a wider operating temperature range (-40°C to 85°C) compared to the FD4000136 (-20°C to 70°C). If your application requires operation below -20°C or above 70°C, the AC-40.000MDE-T is the appropriate selection.

Q: Does frequency stability difference affect substitution eligibility?

A: Frequency stability is a secondary parameter that does not preclude substitution when primary criteria (frequency, voltage, output type, package, and function) are met. However, applications with timing accuracy requirements below ±50ppm should retain the FD4000136 or evaluate the AC-40.000MDE-T against specific system tolerances.

Q: Are both components RoHS compliant?

A: Yes. The FD4000136 is ROHS3 compliant, and the AC-40.000MDE-T is RoHS compliant. Both components meet environmental and regulatory requirements for commercial and industrial applications.

Q: What is the significance of the Tape & Reel packaging for the AC-40.000MDE-T?

A: Tape & Reel (TR) packaging is a standard format for automated assembly processes and high-volume production. It does not affect electrical or mechanical compatibility with the FD4000136. Component selection between standard and TR packaging is typically driven by procurement volume and assembly process requirements rather than technical performance.