TLC252BCDRG4 Equivalent & Substitute Parts

Part Overview

The TLC252BCDRG4 is a CMOS dual-channel operational amplifier manufactured by Texas Instruments in the LinCMOS™ series. This device is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and production continuity. The 8-SOIC surface-mount package provides integration of two independent amplifier circuits suitable for low-power applications requiring CMOS input characteristics.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	TLC252BCDRG4	—
Manufacturer	Texas Instruments	—
Amplifier Type	CMOS	—
Number of Circuits	2	—
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Slew Rate	2.9	V/µs
Gain Bandwidth Product	2.2	MHz
Current - Input Bias	0.6	pA
Voltage - Input Offset	290	µV
Current - Supply	1.9	mA (x2 Channels)
Voltage - Supply Span (Min)	1.4	V
Voltage - Supply Span (Max)	16	V
Operating Temperature	0 to 70	°C
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the TLC252BCDRG4 is determined by the following critical parameters:

Primary Substitution Criteria:

Amplifier Type: CMOS
Number of Circuits: 2
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Voltage - Supply Span: Minimum 1.4 V to Maximum 16 V
Operating Temperature Range: 0°C to 70°C (or extended range)

Secondary Compatibility Parameters:

Slew Rate: 2.9 V/µs or higher
Gain Bandwidth Product: 2.2 MHz or higher
Current - Input Bias: 0.6 pA or lower
Voltage - Input Offset: 290 µV or lower
Current - Supply: 1.9 mA per channel or lower

Substitute parts are grouped into two categories based on performance characteristics:

Category A - Direct CMOS Replacements (TS272 Series): Parts with enhanced slew rate (5.5 V/µs) and higher gain bandwidth product (3.5 MHz), maintaining CMOS architecture and 8-SOIC packaging. These parts offer superior performance while maintaining electrical compatibility.

Category B - Low-Power CMOS Alternatives (TS27L2 Series): Parts with significantly reduced supply current (10 µA per channel) and lower gain bandwidth product (100 kHz), suitable for ultra-low-power applications where bandwidth requirements are relaxed.

Category C - General Purpose Alternative (LM432MA/NOPB): A general-purpose amplifier with different electrical characteristics, including higher input bias current (3 nA) and lower gain bandwidth product (1 MHz), suitable only for applications with relaxed performance requirements.

Parameter Comparison

Parameter	TLC252BCDRG4	TS272ACDT	TS272AIDT	TS272BIDT	TS272CDT	TS272IDT	TS27L2ACDT	TS27L2AIDT	TS27L2BIDT	TS27L2CD	LM432MA/NOPB
Manufacturer	Texas Instruments	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	Texas Instruments
Amplifier Type	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	General Purpose
Number of Circuits	2	2	2	2	2	2	2	2	2	2	2
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Slew Rate (V/µs)	2.9	5.5	5.5	5.5	5.5	5.5	0.04	0.04	0.04	0.04	—
Gain Bandwidth Product (MHz)	2.2	3.5	3.5	3.5	3.5	3.5	0.1	0.1	0.1	0.1	1
Current - Input Bias (pA)	0.6	1	1	1	1	1	1	1	1	1	3000
Voltage - Input Offset (µV)	290	900	900	250	1100	1100	900	1100	250	1100	600
Current - Supply (mA per x2 Channels)	1.9	1	1	1	1	1	0.01	0.01	0.01	0.01	0.15
Voltage - Supply Span Min (V)	1.4	3	3	3	3	3	3	3	3	3	2.5
Voltage - Supply Span Max (V)	16	16	16	16	16	16	16	16	16	16	16
Operating Temperature (°C)	0 to 70	0 to 70	-40 to 125	-40 to 125	0 to 70	-40 to 125	0 to 70	-40 to 125	-40 to 125	0 to 70	-40 to 85
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Recommended Primary Substitutes (TS272 Series - STMicroelectronics):

The TS272ACDT, TS272AIDT, TS272BIDT, TS272CDT, and TS272IDT represent the most direct functional replacements for the TLC252BCDRG4. All TS272 variants maintain CMOS amplifier architecture with dual circuits in 8-SOIC packaging. These parts are currently in active production status, ensuring long-term availability and supply chain continuity. All variants are ROHS3 compliant with MSL 1 rating, matching the original part's environmental specifications.

The TS272 series provides enhanced performance characteristics with slew rate of 5.5 V/µs (versus 2.9 V/µs) and gain bandwidth product of 3.5 MHz (versus 2.2 MHz). Supply current is reduced to 1 mA per channel (versus 1.9 mA), and input bias current is maintained at 1 pA. The minimum supply voltage requirement increases to 3 V, which is compatible with most applications originally designed for the TLC252BCDRG4.

Selection within the TS272 series depends on operating temperature requirements and packaging format:

TS272ACDT and TS272CDT: 0°C to 70°C operating range, Cut Tape packaging
TS272AIDT and TS272IDT: -40°C to 125°C operating range, Tape & Reel packaging
TS272BIDT: -40°C to 125°C operating range, Tape & Reel packaging, 250 µV input offset voltage

Secondary Substitutes (TS27L2 Series - STMicroelectronics):

The TS27L2ACDT, TS27L2AIDT, TS27L2BIDT, and TS27L2CD are suitable for applications where ultra-low power consumption is prioritized. These parts reduce supply current to 10 µA per channel, representing a 190-fold reduction compared to the original TLC252BCDRG4. However, the gain bandwidth product is reduced to 100 kHz, and slew rate is 0.04 V/µs. These characteristics are appropriate only for low-frequency signal conditioning and precision measurement applications.

All TS27L2 variants maintain CMOS architecture, dual-circuit configuration, and 8-SOIC packaging. Active production status and ROHS3 compliance are confirmed for all variants.

Alternative General Purpose Option (LM432MA/NOPB - Texas Instruments):

The LM432MA/NOPB is classified as a general-purpose amplifier rather than a CMOS device. This part is obsolete and exhibits significantly different electrical characteristics, including input bias current of 3 nA (5000 times higher than the TLC252BCDRG4) and gain bandwidth product of 1 MHz. This part is suitable only for applications with relaxed input impedance requirements and is not recommended for new designs.

Frequently Asked Questions (FAQ)

Q: Can the TS272 series directly replace the TLC252BCDRG4 in existing designs?

A: The TS272 series provides functional replacement with enhanced performance. The primary design consideration is the increased minimum supply voltage requirement (3 V versus 1.4 V). Applications operating at supply voltages below 3 V require circuit redesign. All other electrical parameters are compatible or superior, and the 8-SOIC package is identical.

Q: What is the difference between TS272ACDT and TS272AIDT?

A: Both parts are identical in electrical specifications and packaging. The primary difference is operating temperature range: TS272ACDT operates from 0°C to 70°C, while TS272AIDT operates from -40°C to 125°C. Selection depends on the application's temperature requirements. TS272AIDT provides extended temperature coverage for industrial and automotive applications.

Q: Why does the TS27L2 series have such low supply current?

A: The TS27L2 series is specifically designed for ultra-low-power applications. The reduced supply current (10 µA per channel) is achieved through circuit design optimization that inherently reduces bandwidth and slew rate. This trade-off is appropriate for precision measurement, sensor signal conditioning, and battery-powered applications where bandwidth requirements are below 100 kHz.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts (TS272 series and TS27L2 series) are ROHS3 compliant with MSL 1 rating, matching the environmental specifications of the original TLC252BCDRG4. The LM432MA/NOPB is also ROHS3 compliant but is obsolete.

Q: What is the significance of the 8-SOIC package specification?

A: The 8-SOIC package (0.154" width, 3.90 mm) is a standard surface-mount package with identical pin configuration across all recommended substitutes. This ensures direct PCB compatibility without layout modifications. All substitute parts maintain this package specification.

Q: Can the LM432MA/NOPB be used as a substitute?

A: The LM432MA/NOPB is not recommended as a primary substitute due to its general-purpose amplifier classification and significantly different input bias current characteristics (3 nA versus 0.6 pA). Additionally, this part is obsolete. Use only if application requirements explicitly permit higher input bias current and lower bandwidth performance.

Q: What packaging options are available for the TS272 series?

A: TS272 variants are available in Cut Tape (CT) & Digi-Reel® packaging and Tape & Reel (TR) packaging. Selection depends on production volume and assembly process requirements. Both packaging formats are compatible with standard surface-mount assembly equipment.

Q: How does input offset voltage vary across substitute options?

A: Input offset voltage ranges from 250 µV (TS272BIDT, TS27L2BIDT) to 1.1 mV (TS272CDT, TS272IDT, TS27L2AIDT, TS27L2CD). The original TLC252BCDRG4 specifies 290 µV. For precision applications requiring minimal offset voltage, TS272BIDT or TS27L2BIDT are preferred. For general applications, all variants are acceptable.

Q: Is extended temperature range operation available?

A: Yes. TS272AIDT, TS272BIDT, TS272IDT, TS27L2AIDT, and TS27L2BIDT all operate from -40°C to 125°C, providing extended temperature coverage beyond the original TLC252BCDRG4 specification (0°C to 70°C). These variants are suitable for automotive, industrial, and military applications.

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