TLC27M4BCD Equivalent & Substitute Parts

Part Overview

The TLC27M4BCD is a general-purpose operational amplifier integrated circuit manufactured by Texas Instruments, configured as a quad amplifier (4 circuits) in a 14-SOIC surface mount package. This LinCMOS™ series device operates across a 3V to 16V supply range and is designed for applications requiring low-power, general-purpose amplification.

The TLC27M4BCD is designated as Last Time Buy, indicating that Texas Instruments has discontinued this product line. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for systems currently utilizing this component.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	TLC27M4BCD	—
Manufacturer	Texas Instruments	—
Category	Linear, Amplifiers	—
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Slew Rate	0.62	V/µs
Gain Bandwidth Product	525	kHz
Current - Input Bias	0.7	pA
Voltage - Input Offset	260	µV
Current - Supply (x4 Channels)	570	µA
Current - Output / Channel	30	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	16	V
Operating Temperature	0°C ~ 70°C	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—
REACH Status	REACH Unaffected	—
Product Status	Last Time Buy	—

Substitute Part Grouping Explanation

Substitution of the TLC27M4BCD is determined by the following critical parameters that must align with the original design requirements:

Primary Substitution Criteria:

Package / Case: 14-SOIC (0.154", 3.90mm Width) — mechanical and electrical compatibility
Number of Circuits: 4 — functional equivalence
Mounting Type: Surface Mount — assembly process compatibility
Voltage - Supply Span: 3V to 16V — power supply compatibility
RoHS Status: ROHS3 Compliant — regulatory compliance
Moisture Sensitivity Level: 1 (Unlimited) — handling and storage requirements

Secondary Performance Parameters:

Slew Rate: 0.62 V/µs — signal fidelity and bandwidth characteristics
Gain Bandwidth Product: 525 kHz — frequency response capability
Current - Supply: 570 µA (x4 Channels) — power consumption profile
Current - Output / Channel: 30 mA — load driving capability
Operating Temperature: 0°C ~ 70°C — thermal operating range

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

Category 1 — Direct Equivalents (Identical Performance Parameters): TLC27M4BCDR maintains all electrical and mechanical specifications of the TLC27M4BCD with Active product status, providing direct substitution without design modification.

Category 2 — Functional Alternatives (Different Performance Characteristics): TS27L4CDT, TS27L4AIDT, TS27L4IDT, TS27M4CDT, and TS27M4IDT are STMicroelectronics alternatives that maintain package compatibility and supply voltage range but exhibit different slew rates, gain bandwidth products, supply currents, and operating temperature ranges. These parts require design verification to confirm compatibility with specific application requirements.

Parameter Comparison

Parameter	TLC27M4BCD	TLC27M4BCDR	TS27L4AIDT	TS27L4CDT	TS27L4IDT	TS27M4CDT	TS27M4IDT
Manufacturer	Texas Instruments	Texas Instruments	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Amplifier Type	General Purpose	General Purpose	CMOS	CMOS	CMOS	CMOS	CMOS
Number of Circuits	4	4	4	4	4	4	4
Package / Case	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Slew Rate (V/µs)	0.62	0.62	0.04	0.04	0.04	0.6	0.6
Gain Bandwidth Product (kHz)	525	525	100	100	100	1000	1000
Current - Input Bias (pA)	0.7	0.7	1	1	1	1	1
Voltage - Input Offset (µV / mV)	260 µV	260 µV	900 µV	1.1 mV	1.1 mV	1.1 mV	1.1 mV
Current - Supply (µA, x4 Channels)	570	570	10	10	10	150	150
Current - Output / Channel (mA)	30	30	45	45	45	45	45
Voltage - Supply Span (Min)	3 V	3 V	3 V	3 V	3 V	3 V	3 V
Voltage - Supply Span (Max)	16 V	16 V	16 V	16 V	16 V	16 V	16 V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 125°C	0°C ~ 70°C	-40°C ~ 125°C	0°C ~ 70°C	-40°C ~ 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Last Time Buy	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Recommendation: TLC27M4BCDR

The TLC27M4BCDR is the manufacturer-recommended direct equivalent for the TLC27M4BCD. This Texas Instruments part maintains identical electrical specifications, package configuration, and operating parameters while offering Active product status. The TLC27M4BCDR provides continuity for existing designs without requiring circuit modification or performance re-evaluation. This part is suitable for all applications currently utilizing the TLC27M4BCD.

Secondary Recommendations: STMicroelectronics Alternatives

STMicroelectronics TS27 series parts (TS27L4AIDT, TS27L4CDT, TS27L4IDT, TS27M4CDT, TS27M4IDT) are functionally compatible alternatives that maintain the 14-SOIC package and 3V to 16V supply voltage range. These parts are available in Active product status with higher inventory levels.

Selection among STMicroelectronics alternatives depends on application-specific performance requirements:

TS27L4 Series (TS27L4AIDT, TS27L4CDT, TS27L4IDT): These low-power CMOS amplifiers feature significantly reduced supply current (10 µA vs. 570 µA) and lower slew rate (0.04 V/µs vs. 0.62 V/µs). These characteristics are suitable for battery-powered or ultra-low-power applications where bandwidth requirements do not exceed 100 kHz. TS27L4IDT and TS27L4AIDT support extended operating temperature range (-40°C to 125°C).

TS27M4 Series (TS27M4CDT, TS27M4IDT): These CMOS amplifiers provide intermediate performance with slew rate of 0.6 V/µs and gain bandwidth product of 1 MHz, approaching the TLC27M4BCD specifications. Supply current is 150 µA (x4 Channels), representing a 74% reduction compared to the original part. TS27M4IDT supports extended operating temperature range (-40°C to 125°C).

All substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), and REACH Unaffected status, ensuring regulatory and environmental compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can TLC27M4BCDR be used as a direct replacement for TLC27M4BCD without circuit modification?

A: Yes. The TLC27M4BCDR is electrically and mechanically identical to the TLC27M4BCD. All electrical parameters, package dimensions, pin configuration, and operating specifications are equivalent. No circuit modification is required.

Q: What is the primary difference between TLC27M4BCDR and the TS27 series alternatives?

A: The TLC27M4BCDR maintains identical performance specifications to the original TLC27M4BCD. The TS27 series alternatives from STMicroelectronics offer different performance trade-offs: TS27L4 series provides ultra-low power consumption (10 µA) with reduced bandwidth (100 kHz), while TS27M4 series offers intermediate performance (1 MHz bandwidth, 150 µA supply current). Selection depends on whether the application requires the original performance specifications or can benefit from alternative performance characteristics.

Q: Are all substitute parts compatible with the same printed circuit board layout?

A: Yes. All substitute parts use the identical 14-SOIC (0.154", 3.90mm Width) surface mount package. PCB footprints, land patterns, and assembly processes are compatible across all listed alternatives. No PCB redesign is necessary.

Q: What is the operating temperature range difference between substitute parts?

A: The TLC27M4BCD and TLC27M4BCDR operate from 0°C to 70°C. TS27L4AIDT, TS27L4IDT, and TS27M4IDT support extended temperature range from -40°C to 125°C. TS27L4CDT and TS27M4CDT maintain the 0°C to 70°C range. Extended temperature range parts are suitable for industrial and automotive applications requiring broader thermal operating conditions.

Q: How do supply current differences affect circuit design?

A: The TLC27M4BCD and TLC27M4BCDR consume 570 µA (x4 Channels). TS27L4 series alternatives consume 10 µA (x4 Channels), representing a 98% reduction suitable for battery-powered applications. TS27M4 series alternatives consume 150 µA (x4 Channels), representing a 74% reduction. Lower supply current reduces power dissipation and thermal management requirements. Applications with strict power budgets may benefit from TS27 alternatives, while applications requiring the original power consumption profile should use TLC27M4BCDR.

Q: What is the significance of slew rate differences between substitute parts?

A: The TLC27M4BCD and TLC27M4BCDR feature 0.62 V/µs slew rate. TS27L4 series alternatives provide 0.04 V/µs (15x slower), suitable for low-frequency signal conditioning. TS27M4 series alternatives provide 0.6 V/µs (comparable to original). Slew rate determines the maximum rate of output voltage change. Applications requiring high-speed signal processing or fast transient response should verify that the selected substitute part's slew rate meets bandwidth requirements.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. All listed substitute parts are ROHS3 Compliant and REACH Unaffected, matching the regulatory status of the TLC27M4BCD. Moisture Sensitivity Level is 1 (Unlimited) for all parts, indicating no special moisture handling requirements during storage or assembly.

Q: What inventory considerations should guide part selection?

A: The TLC27M4BCD is designated Last Time Buy with 1,379 units in stock. TLC27M4BCDR (Active status) has 2,233 units available. TS27L4CDT offers the highest inventory at 30,200 units. For long-term production requirements, TLC27M4BCDR provides the most direct equivalent with adequate supply. TS27 alternatives offer significantly higher inventory levels for extended production runs.

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