54FCT245ATLB Equivalent & Substitute Parts

Part Overview

The 54FCT245ATLB is an octal bus transceiver with non-inverting logic, featuring 3-state output capability. Manufactured by Renesas Electronics Corporation, this component operates across a supply voltage range of 4.5V to 5.5V and supports operating temperatures from -55°C to 125°C. The device is packaged in a 20-LCC (8.89x8.89mm) surface mount configuration.

The 54FCT245ATLB is classified as an obsolete product. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for legacy systems.

Substiute Parts

54FCT245ATLB

Renesas Electronics CorporationIn Stock: 157254FCT245ATLB Datasheet

Current PartRFQ

CY54FCT245CTLMB

Texas InstrumentsIn Stock: 1005CY54FCT245CTLMB Datasheet

DirectRFQ

CY54FCT245TLMB

Texas InstrumentsIn Stock: 1133CY54FCT245TLMB Datasheet

DirectRFQ

74FCT245ATQG

Renesas Electronics CorporationIn Stock: 70374FCT245ATQG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 54FCT245ATLB are qualified based on the following critical parameters:

• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: 3-State
• Current - Output High, Low: 12mA, 48mA (or higher)
• Voltage - Supply: 4.5V ~ 5.5V (or compatible range)
• Operating Temperature: -55°C ~ 125°C (or extended range)
• Mounting Type: Surface Mount

Substitutes are grouped into two categories:

Category 1: Direct Electrical and Mechanical Equivalents Parts CY54FCT245CTLMB and CY54FCT245TLMB maintain identical electrical specifications and operate within the same voltage and temperature ranges. These parts feature package variants (20-LCCC) that are mechanically compatible with the original 20-LCC footprint.

Category 2: Manufacturer-Recommended Alternative Part 74FCT245ATQG is the manufacturer-recommended substitute from Renesas Electronics Corporation. This part maintains core transceiver functionality with enhanced output current specifications (15mA, 64mA) and operates within a narrower voltage range (4.75V ~ 5.25V) and temperature range (-40°C ~ 85°C). The package format differs (20-QSOP), requiring PCB layout modification.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (No PCB Modification Required): CY54FCT245CTLMB and CY54FCT245TLMB are suitable direct replacements. Both parts are manufactured by Texas Instruments and maintain active product status. These substitutes provide ROHS3 compliance, addressing environmental and regulatory requirements that the obsolete 54FCT245ATLB does not meet. Electrical specifications remain identical, ensuring functional compatibility without design changes.

For Extended Supply Chain Flexibility: 74FCT245ATQG is the manufacturer-recommended alternative from Renesas Electronics Corporation. This part offers enhanced output current capability and maintains active product status with ROHS3 compliance. Selection of this substitute requires PCB layout modification due to the 20-QSOP package format. The narrower operating temperature range (-40°C ~ 85°C) and voltage range (4.75V ~ 5.25V) must be verified against system requirements before implementation.

Compliance Considerations: All substitute parts provide ROHS3 compliance, whereas the original 54FCT245ATLB is RoHS non-compliant. This transition supports regulatory compliance for new production runs and system upgrades.

Frequently Asked Questions (FAQ)

Q: Can CY54FCT245CTLMB and CY54FCT245TLMB be used interchangeably with 54FCT245ATLB? A: Yes. Both Texas Instruments parts maintain identical electrical specifications (12mA/48mA output current, 4.5V–5.5V supply voltage, -55°C to 125°C operating temperature) and compatible package footprints (20-LCCC vs. 20-LCC). No circuit modifications are required.

Q: What is the primary difference between CY54FCT245CTLMB and CY54FCT245TLMB? A: Both parts are functionally and electrically identical. The difference lies in product designation and internal configuration. Selection between these two should be based on availability and supplier preference.

Q: Can 74FCT245ATQG replace 54FCT245ATLB without PCB changes? A: No. The 74FCT245ATQG uses a 20-QSOP package, whereas the original uses 20-LCC. PCB layout modification is required. Additionally, the operating temperature range is narrower (-40°C to 85°C vs. -55°C to 125°C), and the supply voltage range is narrower (4.75V–5.25V vs. 4.5V–5.5V). Verify these specifications against system requirements before selection.

Q: Are all substitute parts RoHS compliant? A: Yes. CY54FCT245CTLMB, CY54FCT245TLMB, and 74FCT245ATQG are all ROHS3 compliant. The original 54FCT245ATLB is RoHS non-compliant.

Q: What output current specifications should I consider when selecting a substitute? A: The original 54FCT245ATLB provides 12mA output high and 48mA output low. CY54FCT245CTLMB and CY54FCT245TLMB maintain these specifications. The 74FCT245ATQG provides higher output current (15mA high, 64mA low), which is compatible with the original specifications and suitable for applications requiring increased drive capability.

Q: Which substitute is recommended for new designs? A: For new designs requiring the 54FCT245 transceiver function, select from the active product alternatives: CY54FCT245CTLMB, CY54FCT245TLMB (for direct footprint compatibility), or 74FCT245ATQG (for Renesas-sourced solutions with enhanced output current). All three are actively manufactured and RoHS compliant.