74HCT14DB,112 Equivalent & Substitute Parts

Part Overview

The 74HCT14DB,112 is a 6-channel inverter IC with Schmitt trigger inputs manufactured by Nexperia USA Inc. in a 14-SSOP surface mount package. This logic component operates at 4.5V to 5.5V supply voltage and is designed for digital signal inversion applications requiring hysteresis input characteristics.

The 74HCT14DB,112 is classified as obsolete. Equivalent and substitute parts are available from active product lines that maintain identical or compatible electrical specifications, allowing direct functional replacement in existing designs.

Key Parameters

Parameter	Specification
Logic Type	Inverter with Schmitt Trigger
Number of Circuits	6 Channels
Number of Inputs	1 Input per Channel
Voltage - Supply	4.5V ~ 5.5V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	4mA, 4mA
Input Logic Level - Low	0.5V ~ 0.6V
Input Logic Level - High	1.9V ~ 2.1V
Max Propagation Delay @ 4.5V, 50pF	34ns
Operating Temperature	-40°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	14-SSOP (0.209", 5.30mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 74HCT14DB,112 is determined by the following criteria:

Electrical Compatibility Requirements:

Logic type: Inverter with Schmitt trigger functionality
Number of circuits: 6 channels
Supply voltage range: 4.5V ~ 5.5V
Input/output logic levels and thresholds
Quiescent current: 2 µA maximum
Output drive current: 4mA minimum
Propagation delay: 34ns or better at specified conditions

Mechanical Compatibility Requirements:

Surface mount technology
Package footprint compatibility (14-pin packages: 14-SSOP or 14-TSSOP)
Moisture sensitivity level: MSL 1

Compliance Requirements:

RoHS3 compliance
REACH unaffected status

Substitute parts are grouped by package type: 14-SSOP variants maintain identical footprints, while 14-TSSOP variants offer reduced package width (4.40mm vs 5.30mm) with identical electrical performance and pin compatibility.

Parameter Comparison

Part Number	Manufacturer	Package	Product Status	Supply Voltage	Quiescent Current	Propagation Delay @ 4.5V	Operating Temp	RoHS Status
74HCT14DB,112	Nexperia USA Inc.	14-SSOP	Obsolete	4.5V ~ 5.5V	2 µA	34ns	-40°C ~ 125°C	ROHS3
74HCT14PW,118	Nexperia USA Inc.	14-TSSOP	Active	4.5V ~ 5.5V	2 µA	34ns	-40°C ~ 125°C	ROHS3
CD74HCT14PW	Texas Instruments	14-TSSOP	Discontinued at DiGi Electronics	4.5V ~ 5.5V	2 µA	38ns	-55°C ~ 125°C	ROHS3
SN74HCT14DBR	Texas Instruments	14-SSOP	Active	4.5V ~ 5.5V	2 µA	30ns	-40°C ~ 85°C	ROHS3
SN74HCT14DGVR	Texas Instruments	14-TVSOP	Active	4.5V ~ 5.5V	2 µA	30ns	-40°C ~ 85°C	ROHS3
SN74HCT14QPWRG4Q1	Texas Instruments	14-TSSOP	Active	4.5V ~ 5.5V	2 µA	30ns	-40°C ~ 125°C	ROHS3

Engineering Selection Recommendations

Primary Substitute (Recommended for Direct Replacement): 74HCT14PW,118 from Nexperia USA Inc. is the primary substitute. It maintains identical electrical specifications and operating temperature range as the original 74HCT14DB,112. The only difference is the package variant (14-TSSOP vs 14-SSOP), which offers a narrower footprint (4.40mm vs 5.30mm width) while maintaining pin-compatible layout. This part is currently active in production with high inventory availability.

Alternative Substitutes (Texas Instruments): SN74HCT14DBR and SN74HCT14QPWRG4Q1 are active alternatives from Texas Instruments. Both offer improved propagation delay performance (30ns vs 34ns) and maintain full electrical compatibility. SN74HCT14QPWRG4Q1 includes AEC-Q100 automotive qualification and extends the operating temperature range to -40°C ~ 125°C, matching the original specification. SN74HCT14DGVR provides the same performance in a 14-TVSOP package variant.

Compliance Status: All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can I use 74HCT14PW,118 as a direct replacement for 74HCT14DB,112? A: Yes. Both parts are electrically identical with matching supply voltage, logic levels, quiescent current, and propagation delay specifications. The package difference (14-TSSOP vs 14-SSOP) requires PCB layout verification for pin compatibility, but the footprints are functionally equivalent for this logic family.

Q: What is the difference between 14-SSOP and 14-TSSOP packages? A: Both are 14-pin surface mount packages with identical pin assignments. The primary difference is package width: 14-SSOP measures 5.30mm while 14-TSSOP measures 4.40mm. Pin pitch and electrical performance are identical. PCB layout must accommodate the specific package width.

Q: Why does CD74HCT14PW show 38ns propagation delay instead of 34ns? A: CD74HCT14PW from Texas Instruments specifies propagation delay at 4.5V with 50pF load as 38ns, compared to 34ns for the Nexperia part. This 4ns difference remains within acceptable margins for most digital logic applications and does not affect functional compatibility.

Q: Is SN74HCT14QPWRG4Q1 suitable for automotive applications? A: SN74HCT14QPWRG4Q1 carries AEC-Q100 automotive qualification and is designed for automotive-grade applications. If your design does not require automotive qualification, standard industrial-grade alternatives are available.

Q: What is the operating temperature difference between substitutes? A: The original 74HCT14DB,112 and 74HCT14PW,118 operate from -40°C to 125°C. SN74HCT14DBR and SN74HCT14DGVR operate from -40°C to 85°C, which is narrower. SN74HCT14QPWRG4Q1 matches the original -40°C to 125°C range. Verify your application's temperature requirements before selection.

Q: Are all substitutes RoHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility with the original design.

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