FT245RQ-TRAY Equivalent & Substitute Parts

Part Overview

The FT245RQ-TRAY is a USB to parallel FIFO interface IC manufactured by FTDI. This 32-QFN package device bridges USB 2.0 connections to parallel FIFO interfaces, enabling data transfer between USB hosts and parallel systems. The part is classified as "Not For New Designs," indicating it has reached end-of-life status. Identifying equivalent and substitute parts is necessary for ongoing system support, legacy design maintenance, and procurement continuity when original inventory becomes unavailable.

Key Parameters

Parameter	FT245RQ-TRAY
Manufacturer Part Number	FT245RQ-TRAY
Manufacturer	FTDI, Future Technology Devices International Ltd
Category	Interface
Description	IC USB TO PARALLEL FIFO 32QFN
Protocol	USB
Function	Bridge, USB to FIFO
Interface Type	FIFO
Standards	USB 2.0
Voltage Supply Range	1.8V ~ 5.25V
Current Supply	15mA
Operating Temperature	-40°C ~ 85°C
Package / Case	32-VFQFN Exposed Pad
Supplier Device Package	32-QFN (5x5)
Product Status	Not For New Designs
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the FT245RQ-TRAY is determined by the following critical parameters:

Protocol and Function: All substitutes must support USB protocol and provide Bridge/USB to FIFO functionality
Interface Type: FIFO interface compatibility is mandatory
Standards Compliance: USB 2.0 standard support is required
Operating Temperature Range: Minimum -40°C ~ 85°C coverage
Supply Voltage Compatibility: Overlap within the specified voltage range
RoHS and Compliance Status: ROHS3 compliance and REACH unaffected status
Package Compatibility: Physical package dimensions and pin count must accommodate system design constraints

The FT245RQ-TRAY has two identified substitutes: FT240XQ-T and FT245RNQ-TRAY. Both are active products from FTDI with current manufacturing status, ensuring long-term availability and support.

Parameter Comparison

Parameter	FT245RQ-TRAY	FT240XQ-T	FT245RNQ-TRAY
Manufacturer	FTDI	FTDI	FTDI
Protocol	USB	USB	USB
Function	Bridge, USB to FIFO	Bridge, USB to FIFO	Bridge, USB to FIFO
Interface Type	FIFO	FIFO	FIFO
Standards	USB 2.0	USB 2.0	USB 2.0
Voltage Supply Range	1.8V ~ 5.25V	3.3V ~ 5V	3.3V ~ 5.25V
Current Supply	15mA	8mA	15mA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	32-VFQFN Exposed Pad	24-WFQFN Exposed Pad	32-VFQFN Exposed Pad
Supplier Device Package	32-QFN (5x5)	24-QFN (4x4)	32-QFN (5x5)
Product Status	Not For New Designs	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

FT245RNQ-TRAY is the primary substitute for FT245RQ-TRAY. Both devices share identical package specifications (32-QFN 5x5), supply current (15mA), and operating temperature range. FT245RNQ-TRAY maintains full voltage supply compatibility (3.3V ~ 5.25V overlaps with the original 1.8V ~ 5.25V range) and is classified as an active product with current manufacturing support. This substitute requires minimal design modification and provides the highest compatibility assurance.

FT240XQ-T is an alternative substitute suitable for applications where package size reduction is acceptable. This device operates in a smaller 24-QFN (4x4) package and draws reduced supply current (8mA). The voltage supply range (3.3V ~ 5V) is narrower than the original but remains compatible with standard 3.3V and 5V system designs. FT240XQ-T is an active product with robust inventory availability. Selection of this substitute requires verification that the reduced pin count and smaller package footprint align with system PCB layout and electrical interface requirements.

Both substitutes maintain ROHS3 compliance, REACH unaffected status, and identical moisture sensitivity levels, ensuring regulatory and environmental compliance equivalence.

Frequently Asked Questions (FAQ)

Q: Can FT245RNQ-TRAY directly replace FT245RQ-TRAY without PCB modifications?

A: Yes. FT245RNQ-TRAY uses the identical 32-QFN (5x5) package with matching pin assignments, supply current, and operating temperature specifications. No PCB layout changes are required. Voltage supply compatibility is maintained within the overlapping range of 3.3V ~ 5.25V.

Q: What are the key differences between FT240XQ-T and FT245RQ-TRAY?

A: FT240XQ-T differs in three aspects: (1) Package size is reduced from 32-QFN (5x5) to 24-QFN (4x4), requiring PCB redesign; (2) Supply current is lower at 8mA versus 15mA; (3) Voltage supply range is narrower at 3.3V ~ 5V versus 1.8V ~ 5.25V. All other functional parameters remain equivalent.

Q: Is FT240XQ-T suitable for 1.8V supply voltage applications?

A: No. FT240XQ-T minimum supply voltage is 3.3V. Applications requiring 1.8V operation must use FT245RNQ-TRAY or retain FT245RQ-TRAY inventory.

Q: Why is FT245RQ-TRAY marked "Not For New Designs"?

A: This status indicates the product has reached end-of-life and FTDI no longer recommends it for new development. FT245RNQ-TRAY and FT240XQ-T are active products recommended for ongoing and future designs.

Q: Are all three parts ROHS3 compliant?

A: Yes. FT245RQ-TRAY, FT245RNQ-TRAY, and FT240XQ-T are all ROHS3 compliant with identical moisture sensitivity levels (MSL 3, 168 Hours).

Q: Which substitute offers the best inventory availability?

A: FT240XQ-T has the highest current inventory at 3,201 pieces. FT245RNQ-TRAY has 5,128 pieces available. FT245RQ-TRAY has 855 pieces remaining.

Q: Can I use FT240XQ-T in a design originally specified for FT245RQ-TRAY?

A: Only if the application can accommodate the smaller 24-QFN (4x4) package footprint and does not require 1.8V supply voltage operation. PCB redesign is necessary. Functional compatibility is confirmed for USB 2.0 FIFO bridge applications.

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