TLC254ID CMOS Amplifier Equivalent & Substitute Parts

Part Overview

The TLC254ID is a CMOS amplifier integrated circuit manufactured by Texas Instruments, containing four independent operational amplifier circuits in a 14-SOIC surface mount package. This device features open drain output configuration and is classified as obsolete product status. Due to its obsolete classification, equivalent substitute parts from active product lines are necessary for new designs and ongoing production requirements. The substitute parts listed maintain functional compatibility through equivalent circuit topology, package form factor, and electrical performance characteristics within specified operating parameters.

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	—
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 eligibility for the TLC254ID is determined by the following critical parameters:

Package Compatibility: All substitute parts must use the 14-SOIC (0.154", 3.90mm Width) surface mount package to ensure direct PCB footprint compatibility.

Circuit Configuration: All substitutes contain four independent CMOS amplifier circuits, maintaining functional equivalence in circuit density and pinout arrangement.

Supply Voltage Range: The TLC254ID operates from 1.4V to 16V. Substitute parts must support this voltage range or a compatible subset. The TS274 series substitutes operate from 3V to 16V minimum, which covers the upper operating range of the TLC254ID.

Operating Temperature: The TLC254ID operates from 0°C to 70°C. Substitute parts are available in both 0°C to 70°C and extended -40°C to 125°C temperature grades.

Compliance Standards: All substitute parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 (Unlimited) moisture sensitivity rating, ensuring regulatory and environmental compatibility.

Product Status: Substitute parts are classified as Active, ensuring continued availability and manufacturing support.

Parameter Comparison

Parameter	TLC254ID (Main)	TS274ACDT	TS274AIDT	TS274CDT	TS274IDT
Manufacturer	Texas Instruments	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Product Status	Obsolete	Active	Active	Active	Active
Amplifier Type	CMOS	CMOS	CMOS	CMOS	CMOS
Number of Circuits	4	4	4	4	4
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Slew Rate	4.5	5.5	5.5	5.5	5.5
Gain Bandwidth Product	2.2	3.5	3.5	3.5	3.5
Current - Input Bias	0.2	1	1	1	1
Voltage - Input Offset	340	900	900	1100	1100
Current - Supply	2.7	1	1	1	1
Voltage - Supply Span (Min)	1.4	3	3	3	3
Voltage - Supply Span (Max)	16	16	16	16	16
Operating Temperature	0 to 70	0 to 70	-40 to 125	0 to 70	-40 to 125
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement (0°C to 70°C Operating Range):

Select TS274ACDT or TS274CDT when the application requires operation within the 0°C to 70°C temperature range. Both parts maintain ROHS3 compliance and MSL 1 rating. TS274ACDT offers lower input offset voltage (900 µV) compared to TS274CDT (1100 µV), providing improved precision in applications sensitive to input offset characteristics. Both are available in active product status with substantial inventory.

For Extended Temperature Range (-40°C to 125°C):

Select TS274AIDT or TS274IDT when the application requires extended operating temperature range. TS274AIDT provides lower input offset voltage (900 µV) compared to TS274IDT (1100 µV). Both maintain full ROHS3 compliance and MSL 1 rating. TS274IDT is supplied in Tape & Reel packaging, while TS274AIDT is available in both Cut Tape and Digi-Reel formats.

Packaging Considerations:

TS274ACDT and TS274CDT are supplied in Cut Tape (CT) and Cut Tape & Digi-Reel formats respectively. TS274AIDT is available in Cut Tape (CT) & Digi-Reel format. TS274IDT is supplied in Tape & Reel (TR) format. Select packaging based on production volume and assembly line requirements.

Supply Voltage Compatibility:

All substitute parts operate from 3V to 16V maximum supply voltage. Applications requiring operation below 3V minimum supply voltage cannot use these substitutes. The TLC254ID minimum supply voltage of 1.4V is not matched by the TS274 series; verify application supply voltage requirements before selection.

Performance Characteristics:

The TS274 series substitutes provide improved slew rate (5.5V/µs versus 4.5V/µs) and higher gain bandwidth product (3.5 MHz versus 2.2 MHz), resulting in faster transient response. Supply current is reduced from 2.7mA to 1mA per channel, improving power efficiency. Input bias current increases from 0.2 pA to 1 pA. These performance differences are acceptable for most general-purpose CMOS amplifier applications.

Frequently Asked Questions (FAQ)

Q: Can TS274ACDT directly replace TLC254ID in all applications?

A: TS274ACDT provides direct PCB footprint compatibility and maintains four-circuit CMOS amplifier configuration. However, verify that your application supply voltage operates at 3V or above, as TS274ACDT minimum supply voltage is 3V compared to TLC254ID minimum of 1.4V. Performance characteristics differ: TS274ACDT provides higher slew rate and bandwidth but increased input offset voltage and input bias current.

Q: What is the difference between TS274ACDT, TS274AIDT, TS274CDT, and TS274IDT?

A: These parts differ in three aspects: (1) Temperature grade—ACDT and CDT operate 0°C to 70°C; AIDT and IDT operate -40°C to 125°C; (2) Input offset voltage—ACDT and AIDT specify 900 µV; CDT and IDT specify 1100 µV; (3) Packaging format—ACDT and CDT use Cut Tape; AIDT uses Cut Tape & Digi-Reel; IDT uses Tape & Reel. Select based on temperature requirements, precision needs, and production packaging format.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All four substitute parts (TS274ACDT, TS274AIDT, TS274CDT, TS274IDT) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the TLC254ID compliance profile.

Q: What is the impact of increased input offset voltage in TS274CDT and TS274IDT?

A: TS274CDT and TS274IDT specify 1100 µV input offset voltage compared to 900 µV for TS274ACDT and TS274AIDT. This 200 µV difference may be significant in precision analog applications requiring low offset voltage. For general-purpose amplification, this difference is typically acceptable. Verify application offset voltage tolerance before selection.

Q: Can I use TS274IDT in applications requiring 0°C to 70°C operation?

A: Yes. TS274IDT is rated for -40°C to 125°C operation, which includes the 0°C to 70°C range. However, if your application operates only within 0°C to 70°C, TS274ACDT or TS274CDT may be more cost-effective alternatives with identical performance within this temperature range.

Q: What is the significance of the reduced supply current in TS274 substitutes?

A: TS274 series parts consume 1mA supply current compared to 2.7mA for TLC254ID, representing 63% reduction in power consumption per channel. This improvement benefits battery-powered applications and reduces thermal dissipation requirements in high-density designs.

Q: Are there any pinout differences between TLC254ID and TS274 substitutes?

A: All parts use identical 14-SOIC package with matching pinout. Direct PCB footprint compatibility is confirmed. No layout modifications are required for substitution.

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