SN74GTL2003PWR Equivalent & Substitute Parts

Part Overview

The SN74GTL2003PWR is a voltage level translator IC manufactured by Texas Instruments, designed for bidirectional signal translation across different voltage domains. This 20-TSSOP surface mount device operates with supply voltages ranging from 0.95V to 5.5V on both VCCA and VCCB, featuring auto-direction sensing and open drain output configuration. The device is Active status and RoHS3 compliant, making it suitable for modern electronic applications requiring low-voltage logic translation.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when design requirements shift toward higher performance specifications, or when automotive-grade qualification is required for specific applications.

Key Parameters

Parameter	SN74GTL2003PWR
Manufacturer	Texas Instruments
Series	74GTL
Translator Type	Voltage Level
Channel Type	Bidirectional
Number of Circuits	1
Channels per Circuit	8
Voltage - VCCA	0.95V ~ 5.5V
Voltage - VCCB	0.95V ~ 5.5V
Output Type	Open Drain
Operating Temperature	-40°C ~ 85°C
Features	Auto-Direction Sensing
Package / Case	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitution for the SN74GTL2003PWR is determined by the following critical parameters:

Functional Equivalence: All substitute parts must provide bidirectional voltage level translation with 8 channels per circuit in a single circuit configuration.

Voltage Domain Compatibility: The original part supports 0.95V to 5.5V on both supply rails. Substitute parts must accommodate overlapping or equivalent voltage ranges to ensure compatibility in the target application.

Output Configuration: The SN74GTL2003PWR features open drain outputs. Substitute parts with 3-state or tri-state outputs remain functionally compatible in most applications, as these output types can be configured to achieve similar signal control.

Package Compatibility: The original 20-TSSOP package can be substituted with 24-TSSOP or 24-DHVQFN packages, as these represent standard industry footprints for similar logic translator devices. Pin count differences are acceptable when functional pin assignments align.

Operating Temperature Range: The original part operates from -40°C to 85°C. Substitute parts with extended temperature ranges (-40°C to 125°C) provide enhanced reliability and are acceptable substitutes.

Compliance and Certification: Active product status and RoHS3 compliance are baseline requirements. Automotive-grade qualification (AEC-Q100) is an enhancement that does not prevent substitution but indicates higher reliability screening.

Parameter Comparison

Parameter	SN74GTL2003PWR	74AVC8T245BQ-Q100J	74AVC8T245PW-Q100J	74LVC4245APW-Q100J	74LVC8T245BQ-Q100J	74LVCH8T245BQ-Q10J	74LVCH8T245PW-Q10J	74LVX3245QSCX
Manufacturer	Texas Instruments	Nexperia USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.	Fairchild Semiconductor
Series	74GTL	74AVC	74AVC	74AVC	74LVC	74LVCH	74LVCH	74LVX
Translator Type	Voltage Level	Translation Transceiver	Translation Transceiver	Voltage Level	Translation Transceiver	Translation Transceiver	Translation Transceiver	Voltage Level
Channel Type	Bidirectional	Bidirectional	Bidirectional	Bidirectional	Bidirectional	Bidirectional	Bidirectional	Bidirectional
Channels per Circuit	8	8	8	8	8	8	8	8
Voltage - Supply (VCCA/VCCB)	0.95V ~ 5.5V / 0.95V ~ 5.5V	0.8V ~ 3.6V	0.8V ~ 3.6V	1.5V ~ 5.5V / 1.5V ~ 3.6V	1.2V ~ 5.5V	1.2V ~ 5.5V	1.2V ~ 5.5V	2.7V ~ 3.6V / 4.5V ~ 5.5V
Output Type	Open Drain	3-State	3-State	Tri-State	3-State	3-State	3-State	Tri-State, Non-Inverted
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C
Package / Case	20-TSSOP	24-DHVQFN (5.5x4.6)	24-TSSOP	24-TSSOP	24-DHVQFN (5.5x4.6)	24-DHVQFN (5.5x4.6)	24-TSSOP	24-QSOP
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified
Product Status	Active	Active	Active	Active	Active	Active	Active	Active
AEC-Q100 Automotive Grade	Not specified	Yes	Yes	Yes	Yes	Yes	Yes	Not specified

Engineering Selection Recommendations

For Direct Package Compatibility (20-TSSOP to 24-TSSOP)

The 74AVC8T245PW-Q100J and 74LVCH8T245PW-Q10J are the closest functional equivalents when PCB layout constraints require TSSOP packaging. Both devices maintain 24-pin TSSOP form factor with identical pin pitch. The 74AVC8T245PW-Q100J operates at lower supply voltages (0.8V to 3.6V) and includes AEC-Q100 automotive qualification. The 74LVCH8T245PW-Q10J supports higher supply voltages (1.2V to 5.5V) and also carries AEC-Q100 qualification, making it suitable for applications requiring extended voltage range compatibility.

For Automotive Applications

All substitute parts listed carry AEC-Q100 automotive-grade qualification, indicating enhanced reliability screening and suitability for automotive environments. The 74AVC8T245PW-Q100J, 74LVC4245APW-Q100J, 74LVC8T245BQ-Q100J, 74LVCH8T245BQ-Q10J, and 74LVCH8T245PW-Q10J are all qualified for automotive use and represent valid substitutes when automotive-grade performance is required.

For Extended Temperature Operation

All substitute parts operate across -40°C to 125°C, exceeding the original part's -40°C to 85°C range. This extended temperature capability provides additional design margin for applications subject to thermal stress.

For Voltage Domain Flexibility

The 74LVC4245APW-Q100J and 74LVC8T245BQ-Q100J support the widest voltage range on VCCA (1.2V to 5.5V), accommodating applications with diverse supply voltage requirements. The 74AVC series parts operate at lower maximum voltages (0.8V to 3.6V), suitable for low-power applications.

For Package Alternatives

The 74AVC8T245BQ-Q100J, 74LVC8T245BQ-Q100J, and 74LVCH8T245BQ-Q10J utilize 24-DHVQFN packaging, offering a compact footprint alternative when space constraints permit package redesign. The 74LVX3245QSCX provides 24-QSOP packaging from Fairchild Semiconductor, representing an alternative supplier option.

Frequently Asked Questions (FAQ)

Q: Can the SN74GTL2003PWR be directly replaced with a 24-pin substitute without PCB modification?

A: Direct pin-for-pin replacement is not possible due to package differences. The original part uses 20-TSSOP packaging, while most substitutes use 24-TSSOP or 24-DHVQFN packages. PCB layout redesign is required. However, the functional pin assignments for the 8-channel bidirectional translator remain consistent across substitute parts, allowing for straightforward schematic adaptation.

Q: What is the primary difference between 3-state and open drain output configurations?

A: Open drain outputs require external pull-up resistors to establish high logic levels, providing greater flexibility in multi-voltage applications. 3-state outputs include internal pull-up structures and offer direct logic level output. Both configurations are functionally compatible in bidirectional translation applications, though circuit design may require adjustment based on the specific output type.

Q: Are all listed substitute parts suitable for automotive applications?

A: All substitute parts listed carry AEC-Q100 automotive-grade qualification except the 74LVX3245QSCX, which does not specify automotive qualification. For automotive applications, select from the AEC-Q100 qualified parts: 74AVC8T245BQ-Q100J, 74AVC8T245PW-Q100J, 74LVC4245APW-Q100J, 74LVC8T245BQ-Q100J, 74LVCH8T245BQ-Q10J, or 74LVCH8T245PW-Q10J.

Q: What voltage range compatibility should be verified when selecting a substitute?

A: Verify that the substitute part's supply voltage range encompasses the application's required voltage domains. The original SN74GTL2003PWR supports 0.95V to 5.5V on both rails. Substitute parts vary: 74AVC series supports 0.8V to 3.6V, 74LVC series supports 1.2V to 5.5V, and 74LVX3245QSCX supports asymmetric ranges (2.7V to 3.6V on one rail, 4.5V to 5.5V on the other). Select based on your specific voltage domain requirements.

Q: Does RoHS3 compliance affect substitution decisions?

A: RoHS3 compliance is a baseline requirement for modern electronic components. All substitute parts except 74LVX3245QSCX explicitly state RoHS3 compliance. For applications requiring RoHS3 certification, prioritize parts with explicit RoHS3 compliance statements.

Q: Can the operating temperature range difference impact substitution suitability?

A: The original part operates to 85°C, while all substitutes operate to 125°C. The extended temperature range of substitute parts provides additional thermal margin and does not prevent substitution. Applications operating within the original -40°C to 85°C range will function correctly with substitute parts rated to 125°C.

Q: What is the significance of the Q100J and Q10J designations in part numbers?

A: These designations indicate automotive qualification levels. Q100J denotes AEC-Q100 Grade 1 qualification (highest reliability), while Q10J indicates AEC-Q100 Grade 2 qualification. Both represent automotive-grade screening and are suitable for automotive applications, with Grade 1 providing enhanced reliability assurance.

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