TS27L4CDT CMOS Amplifier Equivalent & Substitute Parts

Part Overview

The TS27L4CDT is a CMOS amplifier integrated circuit manufactured by STMicroelectronics, configured as a 4-circuit operational amplifier in a 14-SOIC surface mount package. This device is classified as a linear amplifier with active product status and is RoHS3 compliant. The TS27L4CDT serves applications requiring low-power CMOS amplification with moderate bandwidth characteristics. Equivalent and substitute parts are identified based on matching circuit count, package type, mounting configuration, and electrical performance parameters within defined tolerance ranges.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	TS27L4CDT	—
Manufacturer	STMicroelectronics	—
Category	Linear, Amplifiers	—
Amplifier Type	CMOS	—
Number of Circuits	4	—
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Slew Rate	0.04	V/µs
Gain Bandwidth Product	100	kHz
Current - Input Bias	1	pA
Voltage - Input Offset	1.1	mV
Current - Supply (x4 Channels)	10	µA
Current - Output / Channel	45	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	16	V
Operating Temperature	0°C ~ 70°C	—
RoHS Status	ROHS3 Compliant	—
Product Status	Active	—

Substitute Part Grouping Explanation

Substitution of the TS27L4CDT is determined by the following critical parameters:

Primary Matching Criteria:

Number of circuits: 4 (quad configuration required)
Package type: 14-SOIC surface mount
Amplifier classification: CMOS or compatible topology
Supply voltage range: Minimum 3 V to maximum 16 V
Operating temperature range: 0°C to 70°C or extended range
Mounting type: Surface mount

Secondary Compatibility Factors:

Slew rate: 0.04 V/µs or greater
Gain bandwidth product: 100 kHz or greater
Input bias current: 1 pA or lower
Output current per channel: 30 mA or greater
RoHS3 compliance and MSL rating

Substitute parts are grouped into two categories: direct CMOS amplifier equivalents (TLC1079 series) and general-purpose operational amplifiers with enhanced performance (TLC274 series). The TLC1079 series maintains CMOS topology with comparable low-power characteristics. The TLC274 series offers higher slew rate and bandwidth but operates at higher supply current, suitable for applications requiring increased performance headroom.

Parameter Comparison

Parameter	TS27L4CDT	TLC1079CD	TLC1079CDR	TLC1079ID	TLC25L4BCD	TLC25L4CD	TLC274ACD	TLC274ACDR	TLC274AIDR	TLC274BCD	TLC274BCDR
Manufacturer	STMicroelectronics	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Number of Circuits	4	4	4	4	4	4	4	4	4	4	4
Amplifier Type	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Slew Rate (V/µs)	0.04	0.032	0.032	0.032	0.04	0.04	3.6	3.6	3.6	3.6	3.6
Gain Bandwidth Product (kHz)	100	110	110	110	110	110	2200	2200	2200	2200	2200
Current - Input Bias (pA)	1	1	1	1	0.2	0.6	0.6	0.6	0.6	0.6	0.6
Voltage - Input Offset (mV)	1.1	0.18	0.18	0.18	0.34	1.1	0.9	0.9	0.9	0.34	0.34
Current - Supply (µA, x4 Channels)	10	29	29	29	2700	2700	2700	2700	2700	2700	2700
Current - Output / Channel (mA)	45	30	30	30	—	—	30	30	30	30	30
Voltage - Supply Span Min (V)	3	1.4	1.4	3	1.4	1.4	3	3	4	3	3
Voltage - Supply Span Max (V)	16	16	16	16	16	16	16	16	16	16	16
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Last Time Buy	Last Time Buy	Last Time Buy	Last Time Buy	Obsolete	Active	Active	Obsolete	Active

Engineering Selection Recommendations

Direct CMOS Equivalents (Preferred for Drop-In Replacement):

The TLC1079CD and TLC1079CDR represent the closest functional equivalents to the TS27L4CDT. Both devices maintain CMOS amplifier topology with 4-circuit configuration in 14-SOIC packaging. The TLC1079CD is supplied in tube packaging, while TLC1079CDR is supplied in tape and reel format. Both are RoHS3 compliant with MSL rating of 1 (unlimited). The TLC1079CD carries active product status, ensuring long-term availability. The TLC1079CDR is designated as Last Time Buy, indicating limited future availability. Electrical performance is comparable with slew rate of 0.032 V/µs and gain bandwidth product of 110 kHz, both meeting or exceeding the TS27L4CDT specifications. Supply current is marginally higher at 29 µA across 4 channels versus 10 µA for the TS27L4CDT. The TLC1079ID variant extends operating temperature range to -40°C to 85°C and maintains minimum supply voltage of 3 V, matching the TS27L4CDT specification.

CMOS Amplifiers with Single-Ended Output (Alternative CMOS Options):

The TLC25L4BCD and TLC25L4CD are CMOS amplifiers with single-ended output configuration. Both are supplied in tube packaging and designated as Last Time Buy. The TLC25L4BCD exhibits lower input bias current of 0.2 pA and the TLC25L4CD exhibits 0.6 pA input bias current. Both devices operate at significantly higher supply current of 2.7 mA across 4 channels, representing a 270-fold increase compared to the TS27L4CDT. These devices are suitable for applications where higher output current capability is required within the CMOS topology family.

General-Purpose Operational Amplifiers (Performance-Enhanced Substitutes):

The TLC274 series devices (TLC274ACD, TLC274ACDR, TLC274AIDR, TLC274BCD, TLC274BCDR) represent general-purpose operational amplifiers with significantly enhanced performance characteristics. These devices feature slew rate of 3.6 V/µs and gain bandwidth product of 2.2 MHz, representing 90-fold and 22-fold improvements respectively over the TS27L4CDT. All TLC274 variants maintain 4-circuit configuration in 14-SOIC packaging with surface mount mounting type and RoHS3 compliance. The TLC274ACDR and TLC274AIDR carry active product status, ensuring continued availability. The TLC274AIDR extends operating temperature range to -40°C to 85°C and minimum supply voltage to 4 V. Supply current for all TLC274 variants is 2.7 mA across 4 channels. These devices are appropriate for applications requiring higher bandwidth and slew rate performance than the TS27L4CDT baseline specification.

Product Status Considerations:

The TS27L4CDT maintains active product status with 30,200 units in stock, ensuring immediate availability and long-term supply continuity. Among substitute options, TLC1079CD, TLC274ACDR, and TLC274AIDR carry active status. The TLC1079CDR, TLC1079ID, TLC25L4BCD, TLC25L4CD, TLC274ACD, and TLC274BCD are designated as Last Time Buy or Obsolete, indicating limited or no future availability. Selection of active-status devices is recommended for new designs requiring long-term production support.

Frequently Asked Questions (FAQ)

Q: Can the TLC1079CD directly replace the TS27L4CDT in existing designs?

A: The TLC1079CD is functionally compatible as a direct replacement. Both devices are 4-circuit CMOS amplifiers in 14-SOIC surface mount packages with matching supply voltage range (3 V to 16 V) and operating temperature range (0°C to 70°C). Electrical performance is comparable with TLC1079CD slew rate of 0.032 V/µs versus TS27L4CDT 0.04 V/µs, and gain bandwidth product of 110 kHz versus 100 kHz. Supply current is higher at 29 µA versus 10 µA. Pin configuration and functional behavior are equivalent, supporting direct substitution without circuit redesign.

Q: What is the difference between TLC1079CD and TLC1079CDR?

A: Both devices are electrically identical TLC1079 CMOS amplifiers with matching electrical specifications. The primary difference is packaging format: TLC1079CD is supplied in tube packaging, while TLC1079CDR is supplied in tape and reel format. TLC1079CD carries active product status, while TLC1079CDR is designated Last Time Buy. Selection depends on assembly process requirements and supply continuity needs.

Q: Why do TLC274 devices have higher slew rate and bandwidth than the TS27L4CDT?

A: The TLC274 series are general-purpose operational amplifiers, whereas the TS27L4CDT is a CMOS amplifier optimized for low-power operation. The TLC274 architecture prioritizes bandwidth and slew rate performance at the cost of higher supply current consumption (2.7 mA versus 10 µA). The TLC274 series is appropriate for applications requiring higher-frequency signal processing or faster transient response.

Q: Are all substitute parts RoHS3 compliant?

A: All substitute parts listed in this reference are RoHS3 compliant, matching the TS27L4CDT compliance status. All devices carry MSL rating of 1 (unlimited moisture sensitivity level), indicating no special moisture handling requirements during storage or assembly.

Q: What is the significance of "Last Time Buy" product status?

A: Last Time Buy designation indicates that the manufacturer has announced end-of-life for the device and will accept orders only until a specified cutoff date. After this date, the device will no longer be manufactured or available for purchase. Devices with this status should not be selected for new designs requiring long-term production support. Active-status alternatives should be prioritized.

Q: Can TLC25L4 devices substitute for the TS27L4CDT?

A: The TLC25L4BCD and TLC25L4CD are CMOS amplifiers with single-ended output configuration, maintaining 4-circuit topology in 14-SOIC packaging. Both are electrically compatible with the TS27L4CDT from a package and mounting perspective. However, both devices are designated Last Time Buy, limiting their suitability for new designs. Supply current is significantly higher at 2.7 mA versus 10 µA for the TS27L4CDT.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in three packaging formats: tube (standard packaging for manual assembly), tape and reel (for automated assembly), and cut tape with Digi-Reel (for mixed-volume applications). The TS27L4CDT is supplied in cut tape format. Selection of packaging format depends on assembly process requirements and order volume.

Q: How does input offset voltage affect substitution compatibility?

A: Input offset voltage specifications vary across substitute options, ranging from 0.18 mV (TLC1079 series) to 1.1 mV (TS27L4CDT and TLC25L4CD). Lower input offset voltage indicates better precision for DC-coupled amplifier applications. Applications sensitive to DC offset should verify that substitute device offset voltage specifications meet circuit requirements. For AC-coupled applications, input offset voltage is typically not a limiting factor.

Q: Are there temperature-extended variants available?

A: Yes, the TLC1079ID and TLC274AIDR extend operating temperature range to -40°C to 85°C, compared to the standard 0°C to 70°C range of the TS27L4CDT. The TLC1079ID maintains CMOS topology with extended temperature capability. The TLC274AIDR provides extended temperature operation with general-purpose amplifier performance. These variants are suitable for industrial and automotive applications requiring wider temperature operating range.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message