TLC27L4IDR CMOS Amplifier Equivalent & Substitute Parts

Part Overview

The TLC27L4IDR is a LinCMOS™ series CMOS amplifier integrated circuit manufactured by Texas Instruments, containing four independent operational amplifier circuits in a 14-SOIC surface mount package. This device is classified as Active product status and is ROHS3 compliant. The TLC27L4IDR is widely used in analog signal conditioning, filtering, and general-purpose amplification applications requiring low-power CMOS operation across industrial and commercial temperature ranges. Substitute parts are identified to provide design flexibility when the primary part is unavailable or when alternative electrical characteristics better suit specific application requirements.

Key Parameters

Parameter	Value	Unit
Amplifier Type	CMOS	-
Number of Circuits	4	-
Slew Rate	0.05	V/µs
Gain Bandwidth Product	110	kHz
Current - Input Bias	0.7	pA
Voltage - Input Offset	1.1	mV
Current - Supply (x4 Channels)	57	µA
Current - Output / Channel	30	mA
Voltage - Supply Span (Min)	4	V
Voltage - Supply Span (Max)	16	V
Operating Temperature Range	-40 to 85	°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	-
Mounting Type	Surface Mount	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the TLC27L4IDR are identified based on strict electrical and mechanical compatibility criteria. All substitute candidates must meet the following mandatory requirements:

Core Compatibility Criteria:

Amplifier Type: CMOS
Number of Circuits: 4 independent channels
Package / Case: 14-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Electrical Parameter Ranges for Substitution:

Slew Rate: 0.04 to 0.6 V/µs (encompasses low-speed and higher-speed variants)
Gain Bandwidth Product: 100 kHz to 1 MHz (functional range for signal processing applications)
Current - Input Bias: 0.7 to 1 pA (ultra-low input bias current maintained)
Voltage - Input Offset: 900 µV to 1.1 mV (precision input offset specifications)
Current - Supply: 10 to 150 µA per channel (low-power CMOS operation)
Current - Output / Channel: 30 to 45 mA (output drive capability)
Voltage - Supply Span: Minimum 3 V to 4 V; Maximum 16 V (compatible supply ranges)
Operating Temperature: -40°C minimum; maximum 70°C to 125°C (extended or standard industrial ranges)

Substitutes are grouped by electrical performance tier: standard low-speed variants (TS27L4IDT, TS27L4AIDT, TS27L4CDT) and higher-performance variants (TS27M4IDT) with enhanced bandwidth and slew rate characteristics.

Parameter Comparison

Parameter	TLC27L4IDR (Main)	TS27L4IDT	TS27L4AIDT	TS27L4CDT	TS27M4IDT
Manufacturer	Texas Instruments	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Amplifier Type	CMOS	CMOS	CMOS	CMOS	CMOS
Number of Circuits	4	4	4	4	4
Slew Rate (V/µs)	0.05	0.04	0.04	0.04	0.6
Gain Bandwidth Product (kHz)	110	100	100	100	1000
Current - Input Bias (pA)	0.7	1	1	1	1
Voltage - Input Offset (mV)	1.1	1.1	0.9	1.1	1.1
Current - Supply (µA x4)	57	10	10	10	150
Current - Output / Channel (mA)	30	45	45	45	45
Voltage - Supply Span Min (V)	4	3	3	3	3
Voltage - Supply Span Max (V)	16	16	16	16	16
Operating Temperature (°C)	-40 to 85	-40 to 125	-40 to 125	0 to 70	-40 to 125
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

TS27L4IDT (STMicroelectronics)

The TS27L4IDT is a direct functional equivalent offering identical circuit count and package configuration. This substitute provides lower supply current consumption (10 µA vs. 57 µA per channel group), enhanced output drive capability (45 mA vs. 30 mA per channel), and extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C). The TS27L4IDT is suitable for applications requiring reduced power dissipation and wider temperature operation. All compliance certifications (ROHS3, MSL 1) are maintained. Inventory availability is 23,400 units.

TS27L4AIDT (STMicroelectronics) - Manufacturer Recommended

The TS27L4AIDT is the manufacturer-recommended substitute, offering the lowest input offset voltage specification (0.9 mV vs. 1.1 mV), which provides superior precision in precision analog applications. This variant maintains all core electrical and mechanical compatibility parameters while delivering extended temperature range (-40°C to 125°C). Packaging is Tape & Reel format. ROHS3 and MSL 1 compliance are confirmed. Inventory availability is 1,844 units.

TS27L4CDT (STMicroelectronics) - Manufacturer Recommended

The TS27L4CDT is a manufacturer-recommended substitute with identical electrical specifications to TS27L4IDT but restricted to commercial temperature range (0°C to 70°C). This part is suitable for non-industrial applications where extended low-temperature operation is not required. Packaging is Cut Tape format. ROHS3 and MSL 1 compliance are confirmed. Inventory availability is 30,200 units, the highest among all substitutes.

TS27M4IDT (STMicroelectronics) - Manufacturer Recommended

The TS27M4IDT is a higher-performance variant with significantly enhanced bandwidth characteristics: 1 MHz gain bandwidth product and 0.6 V/µs slew rate, compared to 110 kHz and 0.05 V/µs in the TLC27L4IDR. This substitute is suitable for applications requiring faster signal processing, wider frequency response, and higher transient performance. Supply current consumption increases to 150 µA per channel group. Extended operating temperature range (-40°C to 125°C) is provided. ROHS3 and MSL 1 compliance are confirmed. Inventory availability is 7,910 units.

Frequently Asked Questions (FAQ)

Q1: Can TS27L4IDT replace TLC27L4IDR in all applications?

The TS27L4IDT is electrically compatible with the TLC27L4IDR in applications where the extended temperature range (-40°C to 125°C) and lower supply current (10 µA vs. 57 µA) do not conflict with design specifications. The TS27L4IDT provides higher output drive capability (45 mA vs. 30 mA per channel). Verify that your application does not require the specific supply current characteristics of the original part. Both devices maintain identical CMOS amplifier topology, four-circuit configuration, and 14-SOIC package footprint.

Q2: What is the difference between TS27L4AIDT and TS27L4CDT?

Both TS27L4AIDT and TS27L4CDT are STMicroelectronics substitutes with identical electrical performance (0.04 V/µs slew rate, 100 kHz bandwidth, 10 µA supply current). The primary differences are: (1) TS27L4AIDT offers superior input offset voltage specification (0.9 mV vs. 1.1 mV) and extended temperature range (-40°C to 125°C); (2) TS27L4CDT is restricted to commercial temperature range (0°C to 70°C) and has standard input offset voltage (1.1 mV). TS27L4AIDT is packaged in Tape & Reel format; TS27L4CDT is Cut Tape. Select TS27L4AIDT for precision applications requiring full industrial temperature range; select TS27L4CDT for cost-optimized commercial designs.

Q3: When should TS27M4IDT be selected instead of standard TLC27L4IDR substitutes?

The TS27M4IDT is selected when applications require higher bandwidth (1 MHz vs. 110 kHz) and faster slew rate (0.6 V/µs vs. 0.05 V/µs). This higher-performance variant is suitable for wideband signal conditioning, faster transient response, and higher-frequency filtering applications. The trade-off is increased supply current consumption (150 µA per channel group vs. 57 µA in TLC27L4IDR). Verify that your power budget and thermal design accommodate the increased current draw. All mechanical and compliance parameters remain compatible.

Q4: Are all substitute parts pin-compatible with TLC27L4IDR?

All identified substitutes (TS27L4IDT, TS27L4AIDT, TS27L4CDT, TS27M4IDT) are housed in 14-SOIC surface mount packages with identical 0.154" (3.90mm) width. Pin configuration and functional pinout are compatible across all four-circuit CMOS amplifier variants. Direct PCB footprint compatibility is confirmed. Verify schematic connections and supply voltage requirements before assembly.

Q5: What is the impact of lower supply current in TS27L4IDT on circuit design?

The TS27L4IDT operates at 10 µA per channel group compared to 57 µA in the TLC27L4IDR, representing an 82% reduction in quiescent current consumption. This lower supply current reduces power dissipation and heat generation, beneficial for battery-powered and thermally constrained applications. No circuit redesign is required; the lower current is an inherent characteristic of the STMicroelectronics process technology. Verify that your power supply design does not depend on minimum load current specifications.

Q6: Can TS27L4CDT be used in applications requiring -40°C operation?

No. The TS27L4CDT is specified for commercial temperature range (0°C to 70°C) and is not rated for operation below 0°C. For applications requiring full industrial temperature range (-40°C to 85°C or lower), select TS27L4IDT, TS27L4AIDT, or TS27M4IDT, all of which are rated to -40°C minimum. Exceeding specified temperature limits may result in device failure or unpredictable behavior.

Q7: What are the RoHS and compliance implications of using substitute parts?

All identified substitutes (TS27L4IDT, TS27L4AIDT, TS27L4CDT, TS27M4IDT) are ROHS3 compliant and carry Moisture Sensitivity Level 1 (Unlimited), identical to the TLC27L4IDR. REACH status is unaffected for all parts. ECCN classification is EAR99 for all variants. No compliance redesignation is required when substituting any of these parts. Verify with your procurement and compliance teams for specific regulatory requirements in your target markets.

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