AS-3.6864-18 Equivalent & Substitute Parts

Part Overview

The AS-3.6864-18 is a 3.6864 MHz through-hole crystal oscillator manufactured by Raltron Electronics. This fundamental-mode crystal is designed for applications requiring precise frequency generation with a load capacitance of 18pF and an equivalent series resistance of 150 Ohms. The part operates across a temperature range of -20°C to 70°C and maintains a frequency tolerance of ±30ppm with stability of ±50ppm. The AS-3.6864-18 is classified as an active product with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified to address packaging preferences, inventory availability, and supply chain flexibility while maintaining identical electrical and mechanical specifications.

Substiute Parts

AS-3.6864-18

Raltron ElectronicsIn Stock: 887AS-3.6864-18 Datasheet

Current PartRFQ

AS-3.6864-18-SMD-TR

Raltron ElectronicsIn Stock: 1098AS-3.6864-18-SMD-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AS-3.6864-18 is determined by electrical and mechanical parameter equivalence. The critical parameters that define substitutability are: frequency (3.6864 MHz), frequency tolerance (±30ppm), load capacitance (18pF), equivalent series resistance (150 Ohms), operating mode (Fundamental), operating temperature range (-20°C to 70°C), package type (HC-49/US), and physical dimensions (0.447" L x 0.197" W, height 0.138" max). All substitute parts must maintain identical values across these parameters to ensure functional compatibility in circuit applications. Packaging format (Bulk versus Cut Tape) represents a supply chain variable and does not affect electrical or mechanical performance. The substitute part AS-3.6864-18-SMD-TR satisfies all electrical and mechanical equivalence criteria.

Parameter Comparison

Engineering Selection Recommendations

Both the AS-3.6864-18 and AS-3.6864-18-SMD-TR are active products manufactured by Raltron Electronics with full ROHS3 compliance and REACH unaffected status. The parts are electrically and mechanically identical, with all critical parameters matching across frequency, tolerance, load capacitance, ESR, operating temperature, and physical dimensions. The primary distinction between these parts is packaging format: the AS-3.6864-18 is supplied in Bulk packaging, while the AS-3.6864-18-SMD-TR is supplied in Cut Tape format. Selection between these parts should be based on procurement requirements, assembly processes, and inventory management practices. Both parts are suitable for direct substitution in circuit applications requiring a 3.6864 MHz through-hole crystal with 18pF load capacitance and 150 Ohms ESR.

Frequently Asked Questions (FAQ)

Q: Can the AS-3.6864-18-SMD-TR be used as a direct replacement for the AS-3.6864-18?

A: Yes. Both parts are electrically and mechanically identical. They share the same frequency (3.6864 MHz), frequency tolerance (±30ppm), load capacitance (18pF), ESR (150 Ohms), operating temperature range (-20°C to 70°C), HC-49/US package, and physical dimensions. The only difference is packaging format (Bulk versus Cut Tape).

Q: What does the packaging format difference mean for component selection?

A: Packaging format affects supply chain logistics and assembly processes. Bulk packaging is typically used for large-volume orders or manual assembly operations. Cut Tape packaging is designed for automated pick-and-place assembly systems. The electrical and mechanical performance of the crystal is identical regardless of packaging format.

Q: Are both parts compliant with environmental and regulatory standards?

A: Yes. Both the AS-3.6864-18 and AS-3.6864-18-SMD-TR are ROHS3 compliant and REACH unaffected. Both carry an MSL rating of 1 (Unlimited moisture sensitivity), indicating no special moisture handling requirements during storage or assembly.

Q: What are the critical parameters that determine substitutability for this crystal?

A: Substitutability is determined by: frequency (3.6864 MHz), frequency tolerance (±30ppm), load capacitance (18pF), equivalent series resistance (150 Ohms), operating mode (Fundamental), operating temperature range (-20°C to 70°C), package type (HC-49/US), and physical dimensions (0.447" L x 0.197" W, height 0.138" max). Any deviation in these parameters disqualifies a part as a substitute.

Q: Can these crystals be used in applications with different operating temperature requirements?

A: No. Both parts are specified for operation between -20°C and 70°C. Applications requiring extended temperature ranges require alternative crystal specifications.

Q: What is the significance of the 150 Ohms ESR specification?

A: The equivalent series resistance of 150 Ohms is a critical electrical parameter that affects circuit performance, particularly in oscillator design. Substitute parts must maintain this exact ESR value to ensure proper oscillation characteristics and frequency stability in the target application.