74FCT621TSOG Equivalent & Substitute Parts

Part Overview

The 74FCT621TSOG is a non-inverting transceiver IC manufactured by Renesas Electronics Corporation, designed for 8-bit data transmission with open drain output configuration. This component operates within a 4.75V to 5.25V supply voltage range and is housed in a 20-SOIC surface mount package. The part is currently in Last Time Buy status, making identification of equivalent alternatives essential for ongoing design support and procurement planning.

Substiute Parts

74FCT621TSOG

Renesas Electronics CorporationIn Stock: 107474FCT621TSOG Datasheet

Current PartRFQ

74FCT621ATSOG

Renesas Electronics CorporationIn Stock: 151474FCT621ATSOG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74FCT621TSOG is determined by strict equivalence across the following critical parameters:

• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: Open Drain
• Output Current Specifications: 48mA / 64mA
• Supply Voltage Range: 4.75V ~ 5.25V
• Operating Temperature Range: -40°C ~ 85°C
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount

The 74FCT621ATSOG meets all these criteria and is classified as a parametric equivalent. The primary distinction between the main part and its substitute is product status: the 74FCT621TSOG is Last Time Buy, while the 74FCT621ATSOG is Active, providing continued availability for new designs and ongoing production requirements.

Parameter Comparison

Engineering Selection Recommendations

The 74FCT621ATSOG is the direct parametric equivalent for the 74FCT621TSOG. Both parts maintain identical electrical specifications, package dimensions, and compliance certifications (ROHS3 Compliant, REACH Unaffected). The 74FCT621ATSOG is recommended for new designs and ongoing production due to its Active product status, ensuring long-term availability and supply chain continuity. For existing designs currently using the 74FCT621TSOG, transition to the 74FCT621ATSOG requires no circuit modifications, as all functional and electrical parameters remain unchanged.

Frequently Asked Questions (FAQ)

Q: Can the 74FCT621ATSOG be used as a direct replacement for the 74FCT621TSOG?

A: Yes. Both parts are parametric equivalents with identical logic type, bit configuration, output characteristics, supply voltage range, operating temperature range, and package specifications. No circuit modifications are required.

Q: What is the difference between the 74FCT621TSOG and 74FCT621ATSOG?

A: The primary difference is product status. The 74FCT621TSOG is Last Time Buy, indicating end-of-life status. The 74FCT621ATSOG is Active, providing continued manufacturing and availability.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use the identical 20-SOIC (0.295", 7.50mm Width) surface mount package with the same pinout configuration.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 74FCT621TSOG and 74FCT621ATSOG are ROHS3 Compliant, REACH Unaffected, with MSL rating of 1 (Unlimited).

Q: What output current specifications apply to both parts?

A: Both parts provide 48mA output current (high) and 64mA output current (low) with open drain output configuration.

Q: Are the supply voltage and operating temperature ranges identical?

A: Yes. Both parts operate within 4.75V to 5.25V supply voltage range and -40°C to 85°C operating temperature range.