TLC27M4ACD Equivalent & Substitute Parts

Part Overview

The TLC27M4ACD is a general-purpose operational amplifier integrated circuit manufactured by Texas Instruments, featuring four independent amplifier circuits in a 14-SOIC surface mount package. This LinCMOS™ series device operates across a 3V to 16V supply range and is designed for low-power analog signal processing applications. The part is currently in Last Time Buy status, indicating discontinued production. Identification of equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications currently utilizing this component.

Substiute Parts

TLC27M4ACD

Texas InstrumentsIn Stock: 3402TLC27M4ACD Datasheet

Current PartRFQ

TLC27M4ACDR

Texas InstrumentsIn Stock: 3941TLC27M4ACDR Datasheet

MFR RecommendedRFQ

TS27L4AIDT

STMicroelectronicsIn Stock: 1887TS27L4AIDT Datasheet

MFR RecommendedRFQ

TS27L4CDT

STMicroelectronicsIn Stock: 30238TS27L4CDT Datasheet

MFR RecommendedRFQ

TS27L4IDT

STMicroelectronicsIn Stock: 23476TS27L4IDT Datasheet

MFR RecommendedRFQ

TS27M4CDT

STMicroelectronicsIn Stock: 5462TS27M4CDT Datasheet

MFR RecommendedRFQ

TS27M4IDT

STMicroelectronicsIn Stock: 7922TS27M4IDT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLC27M4ACD is determined by strict adherence to the following critical parameters:

Package Compatibility: All substitute parts must utilize the 14-SOIC (0.154", 3.90mm Width) surface mount package to ensure mechanical and electrical compatibility with existing printed circuit board layouts.

Circuit Configuration: All substitute parts must contain four independent amplifier circuits to maintain functional equivalence in multi-channel applications.

Supply Voltage Range: Substitute parts must support the full 3V to 16V supply span to ensure operation across the intended application voltage envelope.

Electrical Performance Envelope: Substitute parts must operate within the defined ranges for slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, and output current per channel.

Regulatory Compliance: All substitute parts must maintain ROHS3 compliance, MSL Level 1 rating, and REACH Unaffected status to satisfy manufacturing and environmental requirements.

Substitute parts are grouped into two categories based on performance characteristics: Texas Instruments LinCMOS™ series variants with matched electrical specifications, and STMicroelectronics CMOS amplifier alternatives with compatible but distinct performance profiles.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: TLC27M4ACDR

The TLC27M4ACDR is the direct functional equivalent of the TLC27M4ACD, manufactured by Texas Instruments in the same LinCMOS™ series. This part maintains identical electrical specifications including slew rate (0.62 V/µs), gain bandwidth product (525 kHz), input bias current (0.7 pA), and supply current (570 µA). The primary distinction is packaging format: TLC27M4ACDR is supplied in Cut Tape and Digi-Reel® format rather than Tube packaging. This part carries Active product status with 3900 units in stock, ensuring supply continuity. All regulatory certifications (ROHS3, MSL 1, REACH Unaffected) are maintained.

Secondary Substitutes: TS27L4 Series (TS27L4AIDT, TS27L4CDT, TS27L4IDT)

The TS27L4 series from STMicroelectronics provides CMOS amplifier alternatives with compatible 14-SOIC packaging and 3V to 16V supply range. These parts feature significantly lower supply current consumption (10 µA versus 570 µA), making them suitable for power-constrained applications. However, performance trade-offs include reduced slew rate (0.04 V/µs versus 0.62 V/µs) and lower gain bandwidth product (100 kHz versus 525 kHz). Input offset voltage is slightly elevated (1.1 mV versus 900 µV). Output current capability is increased (45 mA versus 30 mA). Temperature range variants are available: TS27L4CDT and TS27L4AIDT operate at 0°C to 70°C, while TS27L4IDT and TS27L4AIDT extend to -40°C to 125°C. These parts are suitable for applications where dynamic performance requirements are less stringent than the original TLC27M4ACD.

Tertiary Substitutes: TS27M4 Series (TS27M4CDT, TS27M4IDT)

The TS27M4 series from STMicroelectronics offers enhanced performance characteristics with slew rate (0.6 V/µs) and gain bandwidth product (1 MHz) approaching the original TLC27M4ACD specifications. Supply current consumption is moderate (150 µA), representing a middle ground between the TLC27M4 and TS27L4 series. Input offset voltage is 1.1 mV, and output current capability is 45 mA. Temperature range variants are available: TS27M4CDT operates at 0°C to 70°C, while TS27M4IDT extends to -40°C to 125°C. These parts are suitable for applications requiring performance characteristics between the low-power TS27L4 series and the original TLC27M4ACD.

All substitute parts maintain full regulatory compliance with ROHS3, MSL Level 1, and REACH Unaffected status. Selection should be based on specific application requirements for slew rate, bandwidth, supply current, and operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can TLC27M4ACDR be used as a direct replacement for TLC27M4ACD?

A: Yes. The TLC27M4ACDR is electrically and functionally identical to the TLC27M4ACD. Both parts are manufactured by Texas Instruments, utilize the same LinCMOS™ technology, and share identical electrical specifications. The only difference is packaging format: TLC27M4ACD is supplied in Tube packaging, while TLC27M4ACDR is supplied in Cut Tape and Digi-Reel® format. Both are compatible with 14-SOIC surface mount PCB layouts.

Q: What are the key differences between the TLC27M4 series and the TS27L4 series?

A: The primary differences are slew rate, gain bandwidth product, and supply current consumption. The TLC27M4 series (0.62 V/µs slew rate, 525 kHz bandwidth, 570 µA supply current) is optimized for general-purpose applications requiring moderate dynamic performance. The TS27L4 series (0.04 V/µs slew rate, 100 kHz bandwidth, 10 µA supply current) is optimized for ultra-low-power applications where bandwidth and slew rate requirements are less stringent. Both series maintain compatible 14-SOIC packaging and 3V to 16V supply range.

Q: When should the TS27M4 series be selected over the TS27L4 series?

A: The TS27M4 series should be selected when application requirements demand higher slew rate (0.6 V/µs versus 0.04 V/µs) and gain bandwidth product (1 MHz versus 100 kHz) than the TS27L4 series provides, but lower supply current consumption (150 µA versus 570 µA) than the original TLC27M4 series is acceptable. This series represents a performance and power consumption compromise between the two alternatives.

Q: Are all substitute parts compatible with the same PCB layout as the TLC27M4ACD?

A: Yes. All substitute parts listed utilize the 14-SOIC (0.154", 3.90mm Width) surface mount package, ensuring mechanical and electrical compatibility with existing PCB layouts designed for the TLC27M4ACD. No PCB modifications are required for substitution.

Q: What is the significance of the operating temperature range differences?

A: Operating temperature range defines the environmental conditions under which the part functions within specification. The TLC27M4ACD and TS27L4CDT and TS27M4CDT operate at 0°C to 70°C, suitable for standard industrial and commercial applications. The TS27L4AIDT, TS27L4IDT, and TS27M4IDT extend to -40°C to 125°C, suitable for automotive, aerospace, and extreme environment applications. Selection should match the intended application environment.

Q: Do all substitute parts maintain the same regulatory compliance as the TLC27M4ACD?

A: Yes. All substitute parts listed maintain ROHS3 compliance, MSL Level 1 (Unlimited) rating, and REACH Unaffected status, identical to the TLC27M4ACD. No additional compliance verification is required for regulatory purposes.

Q: What is the impact of input offset voltage differences on circuit design?

A: The TLC27M4ACD and TS27L4AIDT specify 900 µV input offset voltage, while the TS27L4CDT, TS27L4IDT, TS27M4CDT, and TS27M4IDT specify 1.1 mV. This 200 µV difference is negligible for most general-purpose applications but may require offset trimming consideration in precision instrumentation circuits. Applications with offset voltage compensation networks should verify compatibility with the substitute part's specification.

Q: Can the TS27L4 series be used in high-frequency signal processing applications?

A: The TS27L4 series with 100 kHz gain bandwidth product and 0.04 V/µs slew rate is not suitable for high-frequency signal processing. Applications requiring bandwidth above 100 kHz or slew rates above 0.04 V/µs should utilize the TLC27M4ACDR or TS27M4 series alternatives.

Q: What inventory considerations should guide part selection?

A: The TLC27M4ACD is in Last Time Buy status with 3300 units in stock. The TLC27M4ACDR (Active status, 3900 units) is the recommended long-term substitute. The TS27L4CDT offers the highest inventory availability (30200 units), while TS27L4IDT (23400 units) and TS27M4IDT (7910 units) provide additional supply options. Selection should consider both immediate availability and long-term supply chain reliability.