TLC254CDG4 Equivalent & Substitute Parts

Part Overview

The TLC254CDG4 is a CMOS linear amplifier integrated circuit manufactured by Texas Instruments, featuring four independent amplifier circuits in a 14-SOIC surface mount package. This device is classified as discontinued at DiGi Electronics, which necessitates identification of functionally equivalent substitute components for ongoing design support and procurement continuity. The TLC254CDG4 operates across a wide supply voltage range and is suitable for applications requiring low input bias current and precision amplification in compact form factors.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	TLC254CDG4	—
Manufacturer	Texas Instruments	—
Amplifier Type	CMOS	—
Number of Circuits	4	—
Output Type	Open Drain	—
Slew Rate	4.5	V/µs
Gain Bandwidth Product	2.2	MHz
Current - Input Bias	0.6	pA
Voltage - Input Offset	1.1	mV
Current - Supply (x4 Channels)	2.7	mA
Voltage - Supply Span (Min)	1.4	V
Voltage - Supply Span (Max)	16	V
Operating Temperature Range	0 to 70	°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the TLC254CDG4 is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

Amplifier Type: CMOS
Number of Circuits: 4
Package / Case: 14-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Voltage - Supply Span: Minimum 1.4 V to Maximum 16 V (or compatible range)
Operating Temperature: 0°C to 70°C (or extended range)
RoHS3 Compliance

Secondary Compatibility Parameters:

Slew Rate: 4.5 V/µs or higher
Gain Bandwidth Product: 2.2 MHz or higher
Current - Input Bias: 0.6 pA or lower
Voltage - Input Offset: 1.1 mV or lower

Substitute parts are grouped into two categories based on electrical performance alignment:

Category A - Direct Electrical Equivalents (TLC254CD): Identical electrical specifications and output type (Open Drain), differing only in packaging format (Tube vs. Digi-Reel).

Category B - Enhanced Performance Substitutes (TS274 Series): STMicroelectronics TS274 variants offer improved slew rate (5.5 V/µs), higher gain bandwidth product (3.5 MHz), lower input offset voltage (900 µV to 1.1 mV), and reduced supply current (1 mA). These devices maintain 14-SOIC package compatibility and ROHS3 compliance while providing superior electrical performance across the specified supply voltage range.

Parameter Comparison

Parameter	TLC254CDG4	TLC254CD	TS274ACDT	TS274AIDT	TS274CDT	TS274IDT
Manufacturer	Texas Instruments	Texas Instruments	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Product Status	Discontinued	Last Time Buy	Active	Active	Active	Active
Amplifier Type	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS
Number of Circuits	4	4	4	4	4	4
Slew Rate (V/µs)	4.5	4.5	5.5	5.5	5.5	5.5
Gain Bandwidth Product (MHz)	2.2	2.2	3.5	3.5	3.5	3.5
Current - Input Bias (pA)	0.6	0.6	1	1	1	1
Voltage - Input Offset (mV)	1.1	1.1	0.9	0.9	1.1	1.1
Current - Supply (mA)	2.7	2.7	1	1	1	1
Current - Output / Channel (mA)	—	—	45	45	45	45
Voltage - Supply Span Min (V)	1.4	1.4	3	3	3	3
Voltage - Supply Span Max (V)	16	16	16	16	16	16
Operating Temperature (°C)	0 to 70	0 to 70	0 to 70	-40 to 125	0 to 70	-40 to 125
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

The TLC254CD is the primary substitute for the discontinued TLC254CDG4. Both devices share identical electrical specifications, CMOS amplifier architecture, four-circuit configuration, and 14-SOIC package format. The TLC254CD maintains Last Time Buy status, indicating continued availability through authorized distributors. This part is recommended when exact electrical performance matching is required and supply voltage operation below 3 V is necessary.

For Enhanced Performance Applications:

The STMicroelectronics TS274 series (TS274ACDT, TS274AIDT, TS274CDT, TS274IDT) provides superior electrical performance with 25% higher slew rate (5.5 V/µs vs. 4.5 V/µs), 59% higher gain bandwidth product (3.5 MHz vs. 2.2 MHz), and 63% lower supply current per channel (1 mA vs. 2.7 mA). All TS274 variants maintain 14-SOIC package compatibility and ROHS3 compliance. These devices are suitable for applications where improved bandwidth, faster signal response, and reduced power consumption are beneficial.

Temperature Range Considerations:

TS274AIDT and TS274IDT extend operating temperature range to -40°C to 125°C, compared to the standard 0°C to 70°C range of the TLC254CDG4 and TLC254CD. Selection of extended-temperature variants is appropriate for industrial and automotive applications requiring broader thermal operation.

Supply Voltage Compatibility:

The TLC254CDG4 and TLC254CD operate at minimum supply voltage of 1.4 V, while all TS274 variants require minimum 3 V supply. Applications operating below 3 V must use TLC254CD. Applications operating at 3 V or higher may use either TLC254CD or TS274 series without restriction.

Product Status and Procurement:

TLC254CD is designated Last Time Buy, indicating limited future availability. TS274 series devices are Active status with higher inventory levels across all variants, providing superior long-term procurement security for new designs and production continuity.

Frequently Asked Questions (FAQ)

Q1: Can TS274 series devices directly replace TLC254CDG4 in existing designs?

A: TS274 series devices are electrically compatible substitutes with superior performance specifications. However, designs operating at supply voltages below 3 V must use TLC254CD instead. All TS274 variants maintain 14-SOIC package compatibility and require no PCB layout modifications. Functional verification is recommended for applications with critical timing or noise-sensitive signal paths due to improved slew rate and bandwidth characteristics.

Q2: What is the difference between TLC254CD and TLC254CDG4?

A: Both devices share identical electrical specifications and are manufactured by Texas Instruments. The primary difference is packaging format: TLC254CDG4 is supplied in Digi-Reel format, while TLC254CD is supplied in Tube packaging. Electrical performance, pin configuration, and 14-SOIC package dimensions are identical. The devices are functionally interchangeable.

Q3: Why do TS274 variants have different part numbers (ACDT, AIDT, CDT, IDT)?

A: The TS274 series uses a suffix designation system indicating temperature grade and packaging format. ACDT and CDT variants operate at 0°C to 70°C (commercial grade), while AIDT and IDT variants operate at -40°C to 125°C (industrial grade). CDT and ACDT are supplied in Cut Tape & Digi-Reel format, while IDT variants are supplied in Tape & Reel format. All variants maintain identical electrical specifications and 14-SOIC package compatibility.

Q4: Are all substitute parts RoHS3 compliant?

A: Yes. TLC254CD, TS274ACDT, TS274AIDT, TS274CDT, and TS274IDT are all ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited). All devices meet REACH requirements and carry EAR99 ECCN classification.

Q5: What is the impact of lower supply current in TS274 devices?

A: TS274 series devices consume 1 mA total supply current compared to 2.7 mA for TLC254CDG4, representing 63% power reduction. This improvement is beneficial for battery-powered applications and systems with thermal constraints. The lower supply current does not affect output drive capability, as TS274 devices provide 45 mA output current per channel compared to unspecified output current in TLC254CDG4.

Q6: Can TLC254CDG4 be used in applications requiring -40°C to 125°C operation?

A: No. TLC254CDG4 is rated for 0°C to 70°C operation only. Applications requiring extended temperature range must use TS274AIDT or TS274IDT, which are rated for -40°C to 125°C. Both devices maintain identical 14-SOIC package compatibility and ROHS3 compliance.

Q7: What is the significance of Open Drain output type in TLC254CDG4?

A: Open Drain output configuration allows external pull-up resistor connection, enabling flexible output voltage level shifting and multi-supply compatibility. TS274 series devices do not specify output type in provided parameters. Designs dependent on Open Drain output characteristics should prioritize TLC254CD for guaranteed compatibility, or conduct functional verification with TS274 variants.

Q8: Are there inventory availability differences between substitute parts?

A: Yes. TLC254CD has 2200 pcs in stock (Last Time Buy status). TS274 variants have significantly higher inventory: TS274ACDT (45,200 pcs), TS274AIDT (2,098 pcs), TS274CDT (30,100 pcs), and TS274IDT (10,534 pcs). TS274 series provides superior long-term procurement security for production applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message