PI74FCT2245ATQE Equivalent & Substitute Parts

Part Overview

The PI74FCT2245ATQE 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 is housed in a 20-QSOP surface mount package. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	PI74FCT2245ATQE
Manufacturer	Diodes Incorporated
Logic Type	Transceiver, Non-Inverting
Number of Elements	1
Number of Bits per Element	8
Output Type	3-State
Current - Output High, Low	15mA, 64mA
Voltage - Supply	4.75V ~ 5.25V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	20-SSOP (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the PI74FCT2245ATQE is determined by the following critical parameters:

Primary Substitution Criteria:

Logic Type: Transceiver, Non-Inverting
Number of Elements: 1
Number of Bits per Element: 8
Output Type: 3-State
Voltage - Supply: 4.75V ~ 5.25V
Operating Temperature: -40°C ~ 85°C (TA)
Mounting Type: Surface Mount
Current - Output High, Low: 15mA, 64mA

Package Compatibility: Substitutes are grouped into two package categories:

20-QSOP / 20-SSOP (0.154", 3.90mm Width) - Direct footprint compatible with the original PI74FCT2245ATQE
20-TSSOP (0.173", 4.40mm Width) - Functionally equivalent but requires PCB layout adjustment

Active Product Alternatives: The following manufacturers provide active production equivalents meeting all electrical specifications: IDT (Integrated Device Technology Inc), Renesas Electronics Corporation, and Texas Instruments. These parts maintain identical logic functionality, electrical performance, and thermal characteristics while offering improved availability and product lifecycle support.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements / Bits	Output Type	Current High/Low (mA)	Voltage Supply (V)	Temp Range (°C)	Package	Product Status
PI74FCT2245ATQE	Diodes Inc	Transceiver, Non-Inverting	1 / 8	3-State	15, 64	4.75 ~ 5.25	-40 ~ 85	20-QSOP	Obsolete
74FCT245ATPGG	IDT	Transceiver, Non-Inverting	1 / 8	3-State	15, 64	4.75 ~ 5.25	-40 ~ 85	20-TSSOP	Active
74FCT245ATQG8	Renesas	Transceiver, Non-Inverting	1 / 8	3-State	15, 64	4.75 ~ 5.25	-40 ~ 85	20-QSOP	Active
74FCT245CTQG8	IDT	Transceiver, Non-Inverting	1 / 8	3-State	15, 64	4.75 ~ 5.25	-40 ~ 85	20-QSOP	Active
74FCT3245APGG	Renesas	Transceiver, Non-Inverting	1 / 8	3-State	8, 24	2.7 ~ 3.6	-40 ~ 85	20-TSSOP	Active
74FCT3245APGG8	Renesas	Transceiver, Non-Inverting	1 / 8	3-State	8, 24	2.7 ~ 3.6	-40 ~ 85	20-TSSOP	Active
CY74FCT2245ATPWR	Texas Instruments	Transceiver, Non-Inverting	1 / 8	3-State	15, 12	4.75 ~ 5.25	-40 ~ 85	20-TSSOP	Active
CY74FCT2245ATQCT	Texas Instruments	Transceiver, Non-Inverting	1 / 8	3-State	15, 12	4.75 ~ 5.25	-40 ~ 85	20-SSOP	Active
CY74FCT2245CTQCT	Texas Instruments	Transceiver, Non-Inverting	1 / 8	3-State	15, 12	4.75 ~ 5.25	-40 ~ 85	20-SSOP	Active
CY74FCT2245TQCT	Texas Instruments	Transceiver, Non-Inverting	1 / 8	3-State	15, 12	4.75 ~ 5.25	-40 ~ 85	20-SSOP	Active
CY74FCT245ATQCT	Texas Instruments	Transceiver, Non-Inverting	1 / 8	3-State	32, 64	4.75 ~ 5.25	-40 ~ 85	20-SSOP	Active

Engineering Selection Recommendations

Direct Footprint Replacements (20-QSOP / 20-SSOP): For designs requiring no PCB layout modifications, select from parts with identical package dimensions:

74FCT245ATQG8 (Renesas) - Active product, ROHS3 compliant, MSL 1
74FCT245CTQG8 (IDT) - Active product, ROHS3 compliant
CY74FCT2245ATQCT (Texas Instruments) - Active product, ROHS3 compliant, MSL 2
CY74FCT2245CTQCT (Texas Instruments) - Active product, ROHS3 compliant, MSL 2
CY74FCT2245TQCT (Texas Instruments) - Active product, ROHS3 compliant, MSL 1

Functional Equivalents with Package Adjustment (20-TSSOP): For designs permitting minor PCB layout changes:

74FCT245ATPGG (IDT) - Active product, ROHS3 compliant
CY74FCT2245ATPWR (Texas Instruments) - Active product, ROHS3 compliant

Voltage-Reduced Alternatives (2.7V ~ 3.6V Supply): For low-voltage applications:

74FCT3245APGG (Renesas) - Active product, ROHS3 compliant, MSL 1
74FCT3245APGG8 (Renesas) - Active product, ROHS3 compliant, MSL 1

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, matching the original part's regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can I use 74FCT3245APGG as a direct replacement for PI74FCT2245ATQE? A: The 74FCT3245APGG is functionally equivalent in logic operation but operates at a reduced voltage range (2.7V ~ 3.6V versus 4.75V ~ 5.25V). It is suitable only if your system operates within the 2.7V ~ 3.6V supply range. Output current specifications also differ (8mA/24mA versus 15mA/64mA).

Q: What is the difference between 20-QSOP and 20-TSSOP packages? A: Both are 20-pin surface mount packages but differ in width: 20-QSOP is 0.154" (3.90mm) wide, while 20-TSSOP is 0.173" (4.40mm) wide. Parts in 20-QSOP packages are direct footprint replacements. Parts in 20-TSSOP packages require PCB layout adjustment but are electrically identical.

Q: Are all substitute parts ROHS3 compliant? A: Yes, all listed substitute parts are ROHS3 compliant and REACH unaffected, matching the original PI74FCT2245ATQE regulatory status.

Q: What does MSL (Moisture Sensitivity Level) mean for component selection? A: MSL indicates moisture sensitivity during storage and handling. MSL 1 (Unlimited) allows indefinite storage without special conditions. MSL 2 (1 Year) requires controlled storage conditions. Both levels are suitable for standard manufacturing processes.

Q: Why do some Texas Instruments parts show different output current specifications? A: The CY74FCT2245 series (15mA/12mA) and CY74FCT245 series (32mA/64mA) represent different product lines within the 74FCT family. Both are functionally compatible transceivers but with different drive capabilities. Select based on your circuit's current requirements.

Q: Can I mix different manufacturers' parts in the same design? A: Yes. All listed substitutes meet identical electrical specifications for the 5.25V supply range and are pin-compatible. Mixing manufacturers is acceptable from an engineering standpoint, though design teams typically standardize on a single source for consistency.

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