SN74LVC1G19DCKRE4 Equivalent & Substitute Parts

Part Overview

The SN74LVC1G19DCKRE4 is a decoder/demultiplexer logic IC manufactured by Texas Instruments, featuring a 1 x 1:2 circuit configuration in SC-70-6 surface mount packaging. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain functional and electrical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value
Type	Decoder/Demultiplexer
Circuit Configuration	1 x 1:2
Independent Circuits	1
Current - Output High	32mA
Current - Output Low	32mA
Voltage Supply Source	Single Supply
Voltage - Supply Range	1.65V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	6-TSSOP, SC-88, SOT-363
Series	74LVC
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the SN74LVC1G19DCKRE4 is determined by strict equivalence across the following critical parameters:

Decoder/Demultiplexer type with 1 x 1:2 circuit configuration
Single independent circuit
Output current capability: 32mA high and low
Single supply voltage operation within 1.65V ~ 5.5V range
Surface mount packaging compatible with 6-TSSOP, SC-88, or SOT-363 footprints
Operating temperature range of -40°C minimum to 85°C minimum

Substitute parts are grouped into three categories based on manufacturer and packaging specifications while maintaining full electrical and functional equivalence.

Parameter Comparison

Part Number	Manufacturer	Type	Circuit	Output Current (mA)	Voltage Supply (V)	Temp Range (°C)	Package	Status
SN74LVC1G19DCKRE4	Texas Instruments	Decoder/Demux 1x1:2	1 x 1:2	32/32	1.65~5.5	-40~85	SC-70-6	Discontinued
SN74LVC1G19DCKR	Texas Instruments	Decoder/Demux 1x1:2	1 x 1:2	32/32	1.65~5.5	-40~85	SC-70-6	Active
74LVC1G19GW,125	Nexperia USA Inc.	Decoder/Demux 1x1:2	1 x 1:2	32/32	1.65~5.5	-40~125	6-TSSOP	Active
74LVC1G19GV,125	Nexperia USA Inc.	Decoder/Demux 1x1:2	1 x 1:2	32/32	1.65~5.5	-40~125	6-TSOP	Active
NC7SZ19P6X	Fairchild Semiconductor	Decoder/Demux 1x1:2	1 x 1:2	32/32	1.65~5.5	-40~85	SC-88	Active
NL7SZ19DFT2G	onsemi	Decoder/Demux 1x1:2	1 x 1:2	32/32	1.65~5.5	-40~85	SC-88	Active

Engineering Selection Recommendations

Primary Substitute (Direct Replacement): SN74LVC1G19DCKR from Texas Instruments is the direct parametric equivalent with identical electrical specifications and SC-70-6 packaging. This part maintains active product status and is recommended for applications requiring exact form-factor compatibility.

Extended Temperature Range Options: 74LVC1G19GW,125 and 74LVC1G19GV,125 from Nexperia USA Inc. provide extended operating temperature range to -40°C ~ 125°C while maintaining all electrical parameters. These parts are suitable for applications requiring enhanced thermal performance. Package differences (6-TSSOP vs. 6-TSOP) require PCB layout verification.

Cross-Manufacturer Equivalents: NC7SZ19P6X (Fairchild Semiconductor) and NL7SZ19DFT2G (onsemi) are parametric equivalents with identical electrical specifications and operating temperature range matching the original part. Both maintain active product status and ROHS3 compliance. Package compatibility with SC-88/SOT-363 footprints must be confirmed against PCB design.

All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and REACH unaffected status consistent with the original component.

Frequently Asked Questions (FAQ)

Q: Can SN74LVC1G19DCKR be used as a direct replacement for SN74LVC1G19DCKRE4?

A: Yes. SN74LVC1G19DCKR is a parametric equivalent with identical electrical specifications, output current ratings, voltage supply range, operating temperature, and SC-70-6 packaging. The primary difference is product status (active vs. discontinued) and packaging format (Digi-Reel vs. standard).

Q: What is the difference between the Nexperia parts 74LVC1G19GW,125 and 74LVC1G19GV,125?

A: Both parts are functionally equivalent with identical electrical specifications. The primary difference is packaging: 74LVC1G19GW,125 uses 6-TSSOP while 74LVC1G19GV,125 uses 6-TSOP. Both support extended temperature operation to 125°C. PCB footprint compatibility must be verified before selection.

Q: Are cross-manufacturer parts (Fairchild and onsemi) fully compatible?

A: NC7SZ19P6X and NL7SZ19DFT2G maintain identical electrical specifications, output current, voltage supply range, and operating temperature to the original part. Both use SC-88 packaging which is compatible with SOT-363 footprints. Functional compatibility is confirmed; physical placement verification is required.

Q: Does operating temperature range affect substitution eligibility?

A: Operating temperature range is a critical substitution parameter. Parts with -40°C ~ 125°C range (Nexperia options) are suitable for applications requiring the original -40°C ~ 85°C range. Parts with identical -40°C ~ 85°C range (Texas Instruments, Fairchild, onsemi) provide direct thermal equivalence.

Q: What packaging considerations apply when selecting a substitute?

A: The original SC-70-6 package is compatible with 6-TSSOP, SC-88, and SOT-363 footprints. Verify PCB layout and solder pad dimensions before substitution. Nexperia 6-TSOP packaging requires specific footprint confirmation. All parts are surface mount with identical pin counts and functional pinout.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL Level 1 rating consistent with the original SN74LVC1G19DCKRE4, ensuring regulatory and environmental compliance across all options.

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