PI74FCT2245ATQ Equivalent & Substitute Parts

Part Overview

The PI74FCT2245ATQ is a non-inverting octal bidirectional transceiver manufactured by Diodes Incorporated, designed for 5.25V logic applications. This component features 1 element with 8 bits per element, 3-state output capability, and operates across the -40°C to 85°C temperature range. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

PI74FCT2245ATQ

Diodes IncorporatedIn Stock: 966PI74FCT2245ATQ Datasheet

Current PartRFQ

74FCT245ATQG

Renesas Electronics CorporationIn Stock: 70374FCT245ATQG Datasheet

DirectRFQ

74FCT245ATPGG

IDT, Integrated Device Technology IncIn Stock: 342074FCT245ATPGG Datasheet

MFR RecommendedRFQ

74FCT245ATQG8

Renesas Electronics CorporationIn Stock: 382374FCT245ATQG8 Datasheet

MFR RecommendedRFQ

74FCT245CTQG8

IDT, Integrated Device Technology IncIn Stock: 172974FCT245CTQG8 Datasheet

MFR RecommendedRFQ

74FCT3245APGG

Renesas Electronics CorporationIn Stock: 623874FCT3245APGG Datasheet

MFR RecommendedRFQ

74FCT3245APGG8

Renesas Electronics CorporationIn Stock: 111574FCT3245APGG8 Datasheet

MFR RecommendedRFQ

CY74FCT2245ATPWR

Texas InstrumentsIn Stock: 19292CY74FCT2245ATPWR Datasheet

MFR RecommendedRFQ

CY74FCT2245ATQCT

Texas InstrumentsIn Stock: 6943CY74FCT2245ATQCT Datasheet

MFR RecommendedRFQ

CY74FCT2245CTQCT

Texas InstrumentsIn Stock: 1717CY74FCT2245CTQCT Datasheet

MFR RecommendedRFQ

CY74FCT2245TQCT

Texas InstrumentsIn Stock: 5211CY74FCT2245TQCT Datasheet

MFR RecommendedRFQ

CY74FCT245ATQCT

Texas InstrumentsIn Stock: 2353CY74FCT245ATQCT Datasheet

MFR RecommendedRFQ

CY74FCT245CTQCT

Texas InstrumentsIn Stock: 3891CY74FCT245CTQCT Datasheet

MFR RecommendedRFQ

CY74FCT245DTQCT

Texas InstrumentsIn Stock: 4110CY74FCT245DTQCT Datasheet

MFR RecommendedRFQ

CY74FCT245TQCT

Texas InstrumentsIn Stock: 1656CY74FCT245TQCT Datasheet

MFR RecommendedRFQ

74FCT245CTQG

IDT, Integrated Device Technology IncIn Stock: 140674FCT245CTQG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the PI74FCT2245ATQ is determined by the following critical parameters:

Electrical Compatibility:

• Logic type: Transceiver, Non-Inverting
• Number of elements: 1
• Number of bits per element: 8
• Output type: 3-State
• Voltage supply range: 4.75V ~ 5.25V
• Operating temperature: -40°C ~ 85°C (TA)

Mechanical Compatibility:

• Mounting type: Surface Mount
• Package / Case: 20-SSOP (0.154", 3.90mm Width) or equivalent 20-pin packages (20-QSOP, 20-TSSOP)

Substitute parts are grouped into two categories:

Category 1: Direct Electrical & Package Equivalents (5.25V Supply) Parts maintaining identical voltage supply range (4.75V ~ 5.25V), output current specifications (15mA / 64mA), and 20-SSOP or 20-QSOP packaging. These parts are pin-compatible and electrically interchangeable.

Category 2: Functional Equivalents with Package Variation (5.25V Supply) Parts with identical electrical specifications but different package form factors (20-TSSOP instead of 20-SSOP). These require PCB layout modification but maintain full electrical compatibility.

Category 3: Lower Voltage Alternative (3.6V Supply) Parts operating at reduced voltage range (2.7V ~ 3.6V) with lower output current (8mA / 24mA). These are not direct substitutes for 5.25V applications but serve as alternatives for lower-voltage system designs.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Package, Same Voltage):

Select 74FCT245ATQG8 (Renesas Electronics) or CY74FCT2245ATQCT (Texas Instruments) for pin-compatible substitution in 20-SSOP packaging with 4.75V ~ 5.25V supply range. Both parts are active products with ROHS3 compliance, ensuring long-term availability and regulatory alignment. The Renesas part offers higher inventory (3812 Pcs), while the Texas Instruments option provides equivalent electrical performance with established supply chain presence.

For Package Flexibility (Different Package, Same Voltage):

Select 74FCT245ATPGG (IDT) or CY74FCT2245ATPWR (Texas Instruments) when 20-TSSOP packaging is acceptable. These parts maintain identical electrical specifications but require PCB layout modification. The Texas Instruments part (CY74FCT2245ATPWR) offers the highest inventory availability (19200 Pcs) and active product status.

For Lower Voltage Applications:

Select 74FCT3245APGG or 74FCT3245APGG8 (Renesas Electronics) only when system voltage is reduced to 2.7V ~ 3.6V range. These parts are not suitable for 5.25V applications and feature reduced output current specifications (8mA / 24mA versus 15mA / 64mA).

Compliance Consideration:

All recommended active substitutes carry ROHS3 compliance, addressing regulatory requirements absent in the obsolete PI74FCT2245ATQ. Product status is active for all substitutes, ensuring continued manufacturing support and procurement availability.

Frequently Asked Questions (FAQ)

Q: Can I use 74FCT3245APGG as a direct replacement for PI74FCT2245ATQ?

A: No. The 74FCT3245APGG operates at 2.7V ~ 3.6V supply voltage, while the PI74FCT2245ATQ requires 4.75V ~ 5.25V. Additionally, output current specifications differ (8mA / 24mA versus 15mA / 64mA). Use this part only for lower-voltage system designs.

Q: What is the difference between 74FCT245ATQG8 and CY74FCT2245ATQCT?

A: Both parts are electrically equivalent in 20-SSOP packaging with 4.75V ~ 5.25V supply. The primary differences are manufacturer (Renesas versus Texas Instruments) and packaging designation (QSOP versus SSOP). Inventory availability also differs (3812 Pcs versus 6887 Pcs). Select based on supply chain preference and availability.

Q: Can I substitute a 20-TSSOP package part for the 20-SSOP original?

A: Electrically yes, but mechanically no without PCB redesign. The 20-TSSOP package (0.173", 4.40mm width) differs from 20-SSOP (0.154", 3.90mm width). Pin pitch and footprint are incompatible. PCB layout modification is required for 20-TSSOP substitutes such as 74FCT245ATPGG or CY74FCT2245ATPWR.

Q: Why do some substitutes show lower output current (12mA low versus 64mA)?

A: Texas Instruments parts (CY74FCT2245 series) specify 15mA / 12mA output current, while Diodes and Renesas parts specify 15mA / 64mA. Both meet the functional requirements of non-inverting transceiver operation. Verify your application's current requirements before selection.

Q: Is the PI74FCT2245ATQ still available for purchase?

A: The PI74FCT2245ATQ is classified as obsolete. Current inventory is limited (950 Pcs). For new designs or ongoing procurement, select active substitutes such as 74FCT245ATQG8, CY74FCT2245ATQCT, or CY74FCT2245TQCT to ensure long-term supply continuity.

Q: What does ROHS3 compliance mean for my application?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead and other hazardous materials. The original PI74FCT2245ATQ is RoHS non-compliant. All recommended active substitutes carry ROHS3 compliance, supporting regulatory requirements in EU and other regulated markets.