TLC254ACD Equivalent & Substitute Parts

Part Overview

The TLC254ACD is a CMOS amplifier integrated circuit manufactured by Texas Instruments, configured as a 4-circuit operational amplifier in a 14-SOIC surface mount package. This device features open drain output architecture and operates across a wide supply voltage range of 1.4 V to 16 V. The TLC254ACD is designated as Last Time Buy, indicating discontinued production status. Equivalent and substitute parts are necessary to maintain design continuity and ensure long-term component availability for applications currently utilizing this device.

Key Parameters

Parameter	Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	4	—
Output Type	Open Drain	—
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Slew Rate	4.5	V/µs
Gain Bandwidth Product	2.2	MHz
Current - Input Bias	0.6	pA
Voltage - Input Offset	900	µV
Current - Supply (x4 Channels)	2.7	mA
Voltage - Supply Span (Min)	1.4	V
Voltage - Supply Span (Max)	16	V
Operating Temperature	0 to 70	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the TLC254ACD is determined by compatibility across the following critical parameters:

Package and Mounting Compatibility: All substitute parts must utilize the 14-SOIC surface mount package with identical 0.154" (3.90mm) width to ensure direct PCB footprint compatibility without layout modifications.

Circuit Configuration: All substitutes must provide 4 independent amplifier circuits within a single package to maintain functional equivalence.

Amplifier Architecture: Substitutes are grouped into two categories based on amplifier type: CMOS architecture (TS274 series from STMicroelectronics) and General Purpose rail-to-rail architecture (TLV9154IDR from Texas Instruments). CMOS substitutes maintain the original amplifier topology, while the rail-to-rail substitute offers enhanced output swing characteristics.

Supply Voltage Range: Substitute parts must support the maximum supply voltage of 16 V. Minimum supply voltage requirements vary by substitute; designs operating below 3 V require verification of substitute minimum specifications.

Operating Temperature Range: Substitutes are available in two temperature grades: commercial (0°C to 70°C) and industrial (-40°C to 125°C). Selection depends on application thermal requirements.

Electrical Performance: Substitutes are selected based on slew rate, gain bandwidth product, input bias current, and input offset voltage specifications that meet or exceed the original device performance envelope.

Parameter Comparison

Parameter	TLC254ACD	TS274IDT	TS274CDT	TS274ACDT	TS274AIDT	TLV9154IDR
Manufacturer	Texas Instruments	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	Texas Instruments
Amplifier Type	CMOS	CMOS	CMOS	CMOS	CMOS	General Purpose
Number of Circuits	4	4	4	4	4	4
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Slew Rate (V/µs)	4.5	5.5	5.5	5.5	5.5	20
Gain Bandwidth Product (MHz)	2.2	3.5	3.5	3.5	3.5	4.5
Current - Input Bias (pA)	0.6	1	1	1	1	10
Voltage - Input Offset (µV)	900	1100	1100	900	900	125
Current - Supply (mA)	2.7	1	1	1	1	0.56
Voltage - Supply Span Min (V)	1.4	3	3	3	3	2.7
Voltage - Supply Span Max (V)	16	16	16	16	16	16
Operating Temperature (°C)	0 to 70	-40 to 125	0 to 70	0 to 70	-40 to 125	-40 to 125
Product Status	Last Time Buy	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (CMOS Architecture): The TS274 series from STMicroelectronics (TS274IDT, TS274CDT, TS274ACDT, TS274AIDT) provides direct functional equivalence to the TLC254ACD through identical CMOS amplifier architecture and 4-circuit configuration. All TS274 variants maintain the 14-SOIC package footprint and support the full 16 V maximum supply voltage. These substitutes are currently in active production status, ensuring long-term availability.

Temperature Grade Selection: For applications requiring commercial temperature operation (0°C to 70°C), TS274CDT and TS274ACDT are appropriate selections. For extended temperature range applications (-40°C to 125°C), TS274IDT and TS274AIDT provide industrial-grade performance.

Supply Voltage Consideration: The TLC254ACD operates at a minimum supply voltage of 1.4 V, while all TS274 substitutes require a minimum of 3 V. Applications operating below 3 V supply voltage cannot use TS274 substitutes and require alternative solutions.

Alternative Architecture (Rail-to-Rail): The TLV9154IDR from Texas Instruments provides a general purpose amplifier alternative with enhanced performance characteristics including higher slew rate (20 V/µs), improved gain bandwidth product (4.5 MHz), and lower supply current (0.56 mA). This substitute features rail-to-rail output architecture, providing extended output swing compared to the open drain output of the TLC254ACD. The TLV9154IDR supports industrial temperature range (-40°C to 125°C) and maintains ROHS3 compliance and MSL 1 rating.

Compliance and Certification: All substitute parts maintain ROHS3 compliance, MSL 1 (Unlimited) moisture sensitivity rating, and REACH unaffected status, matching the regulatory profile of the original TLC254ACD.

Frequently Asked Questions (FAQ)

Q: Can the TS274 series directly replace the TLC254ACD without PCB modifications?

A: Yes. The TS274 series shares the identical 14-SOIC package with 0.154" (3.90mm) width, enabling direct footprint compatibility. No PCB layout changes are required for package substitution.

Q: What is the primary difference between TS274CDT and TS274ACDT?

A: Both devices are CMOS 4-circuit amplifiers in 14-SOIC packages with identical electrical performance. The primary difference is input offset voltage specification: TS274CDT specifies 1.1 mV maximum, while TS274ACDT specifies 900 µV maximum, matching the TLC254ACD specification. TS274ACDT is the preferred substitute for applications sensitive to input offset voltage.

Q: Why does the TLV9154IDR have different output characteristics than the TLC254ACD?

A: The TLC254ACD features open drain output architecture, while the TLV9154IDR implements rail-to-rail output topology. Rail-to-rail output provides output voltage swing closer to supply rails, offering enhanced dynamic range. Applications requiring open drain output characteristics should select TS274 substitutes instead.

Q: Can I use TLV9154IDR in applications designed for the TLC254ACD?

A: The TLV9154IDR is functionally compatible in most applications due to identical 4-circuit configuration and 14-SOIC package. However, circuit designs exploiting open drain output characteristics of the TLC254ACD require redesign to accommodate rail-to-rail output. Verify output impedance and load requirements before substitution.

Q: What is the minimum supply voltage requirement for TS274 substitutes?

A: All TS274 variants require a minimum supply voltage of 3 V. The TLC254ACD operates at 1.4 V minimum. Applications operating below 3 V cannot use TS274 substitutes.

Q: Are there temperature grade differences among TS274 variants?

A: Yes. TS274CDT and TS274ACDT operate across 0°C to 70°C (commercial grade). TS274IDT and TS274AIDT operate across -40°C to 125°C (industrial grade). Select the appropriate grade based on application thermal environment.

Q: How does supply current consumption compare between substitutes?

A: The TLC254ACD draws 2.7 mA total supply current. TS274 variants draw 1 mA, providing 63% reduction in power consumption. The TLV9154IDR draws 0.56 mA, providing 79% reduction. Lower supply current reduces thermal dissipation and extends battery life in portable applications.

Q: What packaging options are available for TS274 substitutes?

A: TS274IDT is supplied in Tape & Reel (TR) packaging. TS274CDT and TS274AIDT are supplied in Cut Tape (CT) and Digi-Reel® packaging. TS274ACDT is supplied in Cut Tape (CT) packaging. Select packaging based on assembly volume and handling requirements.

Q: Do all substitutes maintain the same regulatory compliance as the TLC254ACD?

A: Yes. All substitute parts are ROHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity rating, and are REACH unaffected, matching the regulatory profile of the TLC254ACD.

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