TLC252BCD Equivalent & Substitute Parts

Part Overview

The TLC252BCD is a CMOS amplifier integrated circuit containing two independent circuits in an 8-SOIC surface mount package, manufactured by Texas Instruments. This device is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production continuity. The TLC252BCD operates across a supply voltage range of 1.4 V to 16 V with a gain bandwidth product of 2.2 MHz and input bias current of 0.6 pA, making it suitable for low-power CMOS amplifier applications.

Key Parameters

Parameter	Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	2	—
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 (x2 Channels)	1.9	mA
Voltage - Supply Span (Min)	1.4	V
Voltage - Supply Span (Max)	16	V
Operating Temperature	0 to 70	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the TLC252BCD is determined by the following critical parameters:

Mandatory Compatibility Criteria:

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

Performance Parameters:

Slew Rate: 2.9 V/µs (baseline)
Gain Bandwidth Product: 2.2 MHz (baseline)
Current - Input Bias: 0.6 pA (baseline)
Voltage - Input Offset: 290 µV (baseline)
Current - Supply: 1.9 mA per two channels (baseline)

Substitute parts are grouped into two categories:

Category A - Direct CMOS Replacements (TS272 Series): Parts with CMOS amplifier type, 2 circuits, 8-SOIC package, and active product status. These devices offer enhanced performance characteristics including higher slew rates (5.5 V/µs) and gain bandwidth products (3.5 MHz) while maintaining CMOS architecture and compatible supply voltage ranges.

Category B - Low-Power CMOS Alternatives (TS27L2 Series): Parts with CMOS amplifier type, 2 circuits, 8-SOIC package, and significantly reduced supply current (10 µA per two channels). These devices are suitable for applications prioritizing ultra-low power consumption with reduced bandwidth (100 kHz).

Category C - General Purpose Alternative (LM432MA/NOPB): A general-purpose amplifier with 2 circuits in 8-SOIC package, offering extended operating temperature range and different electrical characteristics.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	Gain Bandwidth Product (MHz)	Input Bias Current (pA)	Input Offset Voltage (µV)	Supply Current x2 Channels (mA)	Supply Voltage Min (V)	Supply Voltage Max (V)	Operating Temperature (°C)	Product Status
TLC252BCD	Texas Instruments	CMOS	2.9	2.2	0.6	290	1.9	1.4	16	0 to 70	Obsolete
TS272ACDT	STMicroelectronics	CMOS	5.5	3.5	1	900	1	3	16	0 to 70	Active
TS272AIDT	STMicroelectronics	CMOS	5.5	3.5	1	900	1	3	16	-40 to 125	Active
TS272BIDT	STMicroelectronics	CMOS	5.5	3.5	1	250	1	3	16	-40 to 125	Active
TS272CDT	STMicroelectronics	CMOS	5.5	3.5	1	1100	1	3	16	0 to 70	Active
TS272IDT	STMicroelectronics	CMOS	5.5	3.5	1	1100	1	3	16	-40 to 125	Active
TS27L2ACDT	STMicroelectronics	CMOS	0.04	0.1	1	900	0.01	3	16	0 to 70	Active
TS27L2AIDT	STMicroelectronics	CMOS	0.04	0.1	1	1100	0.01	3	16	-40 to 125	Active
TS27L2BIDT	STMicroelectronics	CMOS	0.04	0.1	1	250	0.01	3	16	-40 to 125	Active
TS27L2CD	STMicroelectronics	CMOS	0.04	0.1	1	1100	0.01	3	16	0 to 70	Active
LM432MA/NOPB	Texas Instruments	General Purpose	—	1	3000	600	0.15	2.5	16	-40 to 85	Obsolete

Engineering Selection Recommendations

For Direct Performance Replacement:

The TS272 series (TS272ACDT, TS272AIDT, TS272BIDT, TS272CDT, TS272IDT) from STMicroelectronics provides the most direct functional replacement for the TLC252BCD. These parts maintain CMOS amplifier architecture with 2 circuits in 8-SOIC packaging and active product status. The TS272 series demonstrates superior performance with higher slew rates (5.5 V/µs versus 2.9 V/µs) and increased gain bandwidth product (3.5 MHz versus 2.2 MHz). All TS272 variants are ROHS3 compliant and carry unlimited moisture sensitivity level (MSL 1).

Selection within the TS272 series depends on operating temperature requirements and input offset voltage specifications:

TS272ACDT and TS272CDT: 0°C to 70°C operating range
TS272AIDT and TS272IDT: -40°C to 125°C extended operating range
TS272BIDT: -40°C to 125°C with 250 µV input offset voltage

For Ultra-Low Power Applications:

The TS27L2 series (TS27L2ACDT, TS27L2AIDT, TS27L2BIDT, TS27L2CD) offers CMOS amplifier architecture with dramatically reduced supply current (10 µA per two channels versus 1.9 mA). This series is appropriate for battery-powered or energy-constrained applications where bandwidth requirements are modest (100 kHz gain bandwidth product). All TS27L2 variants maintain 8-SOIC packaging and active product status with ROHS3 compliance.

For Extended Temperature Range:

Parts designated with "I" suffix (TS272AIDT, TS272IDT, TS27L2AIDT, TS27L2BIDT) support -40°C to 125°C operating temperature, exceeding the TLC252BCD specification of 0°C to 70°C. These variants are suitable for industrial and automotive applications requiring extended temperature performance.

Compliance and Regulatory Status:

All recommended substitute parts maintain ROHS3 compliance, REACH unaffected status, and EAR99 ECCN classification consistent with the original TLC252BCD. Moisture sensitivity level remains at MSL 1 (unlimited) across all alternatives.

Frequently Asked Questions (FAQ)

Q: Can the TS272 series directly replace the TLC252BCD in existing designs?

A: The TS272 series shares identical package geometry (8-SOIC, 0.154" width, 3.90mm), mounting type (surface mount), and pin count. Both are CMOS dual-amplifier devices with compatible supply voltage ranges (3 V to 16 V for TS272 versus 1.4 V to 16 V for TLC252BCD). However, the TS272 series requires a minimum supply voltage of 3 V, whereas the TLC252BCD operates at 1.4 V minimum. Designs operating below 3 V supply voltage cannot use TS272 substitutes. Performance characteristics differ: TS272 devices exhibit higher slew rates and bandwidth. Circuit validation is necessary to confirm compatibility with these enhanced specifications.

Q: What is the primary difference between TS272 and TS27L2 series?

A: The TS272 series provides standard CMOS amplifier performance with 1 mA supply current per two channels and 3.5 MHz gain bandwidth product. The TS27L2 series prioritizes ultra-low power consumption with 10 µA supply current per two channels and 100 kHz gain bandwidth product. Selection depends on application requirements: TS272 for general-purpose amplification with moderate bandwidth, TS27L2 for power-constrained applications with lower bandwidth requirements.

Q: Are temperature-rated variants (I-suffix) interchangeable with standard variants (C-suffix)?

A: Temperature-rated variants (I-suffix) support -40°C to 125°C operating range, while standard variants (C-suffix) support 0°C to 70°C. I-suffix parts are functionally compatible with C-suffix applications but represent a higher specification grade. I-suffix parts can substitute for C-suffix parts in designs requiring extended temperature performance. C-suffix parts cannot substitute for I-suffix applications requiring below 0°C or above 70°C operation.

Q: What packaging options are available for TS272 and TS27L2 substitutes?

A: All TS272 and TS27L2 variants are supplied in 8-SOIC surface mount package (0.154" width, 3.90mm). Packaging formats differ by part number suffix: "DT" indicates Cut Tape (CT) & Digi-Reel® format, "IDT" indicates Tape & Reel (TR) format, and "CD" indicates Tube format. These packaging variations do not affect electrical performance or pin compatibility; selection depends on procurement and assembly requirements.

Q: Why is the LM432MA/NOPB listed as a substitute despite being a general-purpose amplifier?

A: The LM432MA/NOPB is included as an alternative for applications where general-purpose amplifier characteristics are acceptable. This part shares 8-SOIC packaging and dual-circuit configuration but differs in amplifier type (general purpose versus CMOS), bandwidth (1 MHz versus 2.2 MHz), and input bias current (3 nA versus 0.6 pA). The LM432MA/NOPB is also obsolete and is not recommended as a primary substitute. It is listed for reference only in legacy design scenarios.

Q: What is the significance of input offset voltage variations across substitute parts?

A: Input offset voltage specifications vary across substitute parts: TLC252BCD (290 µV), TS272ACDT/TS27L2ACDT (900 µV), TS272BIDT/TS27L2BIDT (250 µV), and TS272CDT/TS272IDT/TS27L2CD (1.1 mV). Lower input offset voltage reduces DC error in precision amplifier circuits. Applications requiring minimal offset voltage should select TS272BIDT or TS27L2BIDT (250 µV). Applications with relaxed offset requirements can use standard variants. Circuit design must account for these variations in gain and offset calibration stages.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts (TS272 series, TS27L2 series, and LM432MA/NOPB) are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level) and REACH unaffected status. These certifications match the original TLC252BCD specifications, ensuring regulatory compliance for new designs and production continuity.

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