TLC1078CDR Equivalent & Substitute Parts

Part Overview

The TLC1078CDR is a CMOS amplifier integrated circuit manufactured by Texas Instruments, configured as a dual-channel (2 circuit) operational amplifier in an 8-SOIC surface mount package. This device is classified as active product status and is RoHS3 compliant. The TLC1078CDR is designed for low-power, low-speed CMOS amplifier applications requiring minimal input bias current and low supply current consumption.

Substitute parts are necessary when the TLC1078CDR becomes unavailable, when alternative packaging formats are required, or when application requirements demand different performance characteristics within compatible electrical and mechanical parameters. All substitute parts listed maintain the same package footprint (8-SOIC, 0.154" width, 3.90mm) and dual-circuit configuration.

Key Parameters

Parameter	TLC1078CDR Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	2	—
Slew Rate	0.032	V/µs
Gain Bandwidth Product	110	kHz
Current - Input Bias	1	pA
Voltage - Input Offset	180	µV
Current - Supply (x2 Channels)	29	µA
Current - Output / Channel	30	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	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the TLC1078CDR are grouped based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

Package type: 8-SOIC surface mount configuration (0.154" width, 3.90mm)
Dual-circuit configuration (2 amplifier circuits per package)
Amplifier type: CMOS technology
Supply voltage range: Minimum 1.4V to maximum 16V (TLC1078CDR operates within 1.4V–16V)
Output current per channel: 30 mA or greater
Input bias current: 1 pA (ultra-low leakage requirement)
Operating temperature range: 0°C to 70°C (standard industrial range)

Substitution Logic:

The substitute parts are divided into two functional categories:

Category 1: Direct CMOS Low-Speed Substitutes (TS27L2 Series) These parts maintain the low slew rate (0.04V/µs) and low gain bandwidth product (100 kHz) characteristics of the TLC1078CDR, making them suitable for applications requiring minimal power consumption and low-frequency signal processing. Parts include TS27L2ACDT, TS27L2AIDT, TS27L2BIDT, and TS27L2CD.

Category 2: Higher-Performance CMOS Substitutes (TS272 Series) These parts offer increased slew rate (5.5V/µs) and higher gain bandwidth product (3.5 MHz), suitable for applications requiring faster signal response while maintaining CMOS technology and low input bias current. Parts include TS272ACDT, TS272AIDT, TS272BIDT, TS272CDT, and TS272IDT.

Category 3: General Purpose Substitute (LM432MA/NOPB) This part is a general-purpose amplifier with higher gain bandwidth product (1 MHz) and higher input bias current (3 nA). Product status is obsolete; use only when no other alternatives are available.

All substitute parts maintain RoHS3 compliance, MSL Level 1, and 8-SOIC package compatibility.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (kHz)	Input Bias (pA)	Input Offset (µV)	Supply Current (µA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Status
TLC1078CDR	Texas Instruments	CMOS	0.032	110	1	180	29	30	1.4	16	0 to 70	Active
TS27L2ACDT	STMicroelectronics	CMOS	0.04	100	1	900	10	45	3	16	0 to 70	Active
TS27L2AIDT	STMicroelectronics	CMOS	0.04	100	1	1100	10	45	3	16	-40 to 125	Active
TS27L2BIDT	STMicroelectronics	CMOS	0.04	100	1	250	10	45	3	16	-40 to 125	Active
TS27L2CD	STMicroelectronics	CMOS	0.04	100	1	1100	10	45	3	16	0 to 70	Active
TS272ACDT	STMicroelectronics	CMOS	5.5	3500	1	900	1000	45	3	16	0 to 70	Active
TS272AIDT	STMicroelectronics	CMOS	5.5	3500	1	900	1000	45	3	16	-40 to 125	Active
TS272BIDT	STMicroelectronics	CMOS	5.5	3500	1	250	1000	45	3	16	-40 to 125	Active
TS272CDT	STMicroelectronics	CMOS	5.5	3500	1	1100	1000	45	3	16	0 to 70	Active
TS272IDT	STMicroelectronics	CMOS	5.5	3500	1	1100	1000	45	3	16	-40 to 125	Active
LM432MA/NOPB	Texas Instruments	General Purpose	—	1000	3000	600	150	30	2.5	16	-40 to 85	Obsolete

Engineering Selection Recommendations

For Low-Power, Low-Frequency Applications (Direct Replacement):

Select from the TS27L2 series (TS27L2ACDT, TS27L2AIDT, TS27L2BIDT, TS27L2CD) when the application requires minimal power consumption and operates at frequencies below 100 kHz. These parts maintain slew rates comparable to the TLC1078CDR (0.04V/µs vs. 0.032V/µs) and supply current below 10µA per channel. All TS27L2 variants are active products with RoHS3 compliance and MSL Level 1 rating.

For Extended Temperature Range Applications:

If the application requires operation beyond the standard 0°C to 70°C range, select TS27L2AIDT, TS27L2BIDT, TS272AIDT, TS272BIDT, or TS272IDT, which support -40°C to 125°C operating temperature. These parts maintain CMOS technology and RoHS3 compliance.

For Higher-Speed Applications:

Select from the TS272 series (TS272ACDT, TS272AIDT, TS272BIDT, TS272CDT, TS272IDT) when the application requires slew rates of 5.5V/µs and gain bandwidth product of 3.5 MHz. Note that supply current increases to 1mA per channel. All TS272 variants are active products with RoHS3 compliance and MSL Level 1 rating.

For Packaging Format Flexibility:

The TLC1078CDR is supplied in Tape & Reel (TR) format. Equivalent parts are available in Cut Tape (CT) & Digi-Reel® format (TS272ACDT, TS27L2AIDT) or Tube format (LM432MA/NOPB, TS27L2CD) to accommodate different procurement and assembly requirements.

Avoid LM432MA/NOPB:

The LM432MA/NOPB is classified as obsolete product status. Use only when no active alternatives meet application requirements. This part exhibits higher input bias current (3 nA vs. 1 pA) and higher input offset voltage (600 µV vs. 180 µV), making it unsuitable for precision low-bias applications.

Compliance Verification:

All recommended substitute parts maintain RoHS3 compliance, REACH unaffected status, and MSL Level 1 (unlimited moisture sensitivity). ECCN classification is EAR99 for all parts. HTSUS code 8542.33.0001 applies uniformly across all substitutes.

Frequently Asked Questions (FAQ)

Q1: Can TS272 series parts directly replace TLC1078CDR in existing designs?

A: TS272 series parts are mechanically compatible (8-SOIC package) and electrically compatible (CMOS technology, dual circuits, 1 pA input bias current, 1.4V–16V supply range). However, TS272 parts exhibit significantly higher slew rate (5.5V/µs vs. 0.032V/µs) and higher gain bandwidth product (3.5 MHz vs. 110 kHz). Direct substitution is valid only if the application does not depend on the low-speed characteristics of the TLC1078CDR. Circuit simulation or bench testing is recommended for critical applications.

Q2: What is the difference between TS27L2ACDT and TS27L2AIDT?

A: Both parts are STMicroelectronics TS27L2 CMOS amplifiers with identical electrical performance (0.04V/µs slew rate, 100 kHz GBW, 1 pA input bias). The primary difference is operating temperature range: TS27L2ACDT operates 0°C to 70°C, while TS27L2AIDT operates -40°C to 125°C. Packaging differs: TS27L2ACDT uses Tape & Reel (TR) format; TS27L2AIDT uses Cut Tape (CT) & Digi-Reel® format.

Q3: Why does the TLC1078CDR have a lower minimum supply voltage (1.4V) compared to TS27L2 substitutes (3V minimum)?

A: The TLC1078CDR is specified to operate at supply voltages as low as 1.4V, while TS27L2 series parts require minimum 3V supply. This is a fundamental design difference between the two product families. If the application requires operation below 3V supply voltage, the TLC1078CDR cannot be substituted with TS27L2 parts.

Q4: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (TS27L2 series, TS272 series, and LM432MA/NOPB) are RoHS3 compliant with MSL Level 1 (unlimited moisture sensitivity). REACH status is unaffected for all parts. ECCN classification is EAR99 for all parts.

Q5: What is the significance of input offset voltage differences among substitute parts?

A: Input offset voltage determines the DC error at the amplifier output when no signal is applied. The TLC1078CDR specifies 180 µV input offset. TS27L2ACDT specifies 900 µV, while TS27L2BIDT specifies 250 µV. For precision DC amplification or instrumentation applications, lower input offset voltage is preferred. Select TS27L2BIDT (250 µV) or TS272BIDT (250 µV) for improved DC accuracy compared to other variants.

Q6: Can TS272 parts be used in battery-powered applications?

A: TS272 series parts consume 1mA supply current per channel (2mA total for dual-channel configuration), compared to 29µA for the TLC1078CDR. For battery-powered applications requiring extended operating life, TS27L2 series parts (10µA per channel) are more suitable. TS272 substitution is acceptable only if power consumption constraints are relaxed.

Q7: What packaging formats are available for substitute parts?

A: Substitute parts are available in three packaging formats: Tape & Reel (TR) for automated assembly, Cut Tape (CT) & Digi-Reel® for semi-automated or manual assembly, and Tube for manual assembly or small-quantity applications. The TLC1078CDR is supplied in TR format. Equivalent parts in alternative formats are available to accommodate different procurement workflows.

Q8: Is LM432MA/NOPB a viable substitute?

A: LM432MA/NOPB is classified as obsolete product status and should be used only as a last resort when no active alternatives are available. This part exhibits significantly higher input bias current (3 nA vs. 1 pA) and higher input offset voltage (600 µV vs. 180 µV), making it unsuitable for low-bias precision applications. Active alternatives from the TS27L2 and TS272 series are strongly preferred.

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