TS27L2BCD Equivalent & Substitute Parts

Part Overview

The TS27L2BCD is a CMOS amplifier integrated circuit manufactured by STMicroelectronics, configured as a dual-circuit operational amplifier in an 8-SOIC surface mount package. This device is classified as obsolete, indicating discontinued production and limited availability in the market. The identification of equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for applications utilizing this component.

Key Parameters

Parameter	Value
Manufacturer Part Number	TS27L2BCD
Manufacturer	STMicroelectronics
Amplifier Type	CMOS
Number of Circuits	2
Package / Case	8-SOIC (0.154", 3.90mm Width)
Slew Rate	0.04 V/µs
Gain Bandwidth Product	100 kHz
Current - Input Bias	1 pA
Voltage - Input Offset	1.1 mV
Current - Supply	10 µA (x2 Channels)
Current - Output / Channel	45 mA
Voltage - Supply Span (Min)	3 V
Voltage - Supply Span (Max)	16 V
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the TS27L2BCD is determined by strict alignment of electrical and mechanical parameters within the CMOS amplifier category. The primary substitution criteria are:

Critical Matching Parameters:

Amplifier Type: CMOS technology
Number of Circuits: Dual-channel configuration (2 circuits)
Package / Case: 8-SOIC form factor with 0.154" (3.90mm) width
Mounting Type: Surface mount compatibility
Voltage Supply Range: Minimum 3 V to maximum 16 V operational span
Operating Temperature Range: 0°C to 70°C minimum requirement
Input Bias Current: 1 pA specification
Slew Rate: 0.04 V/µs or compatible performance
Gain Bandwidth Product: 100 kHz or compatible performance

Compliance Requirements:

RoHS3 compliance mandatory
MSL Level 1 (Unlimited) moisture sensitivity
REACH unaffected status

The substitute parts identified below meet these criteria and are available in active or last-time-buy product status, providing viable alternatives to the obsolete TS27L2BCD.

Parameter Comparison

Parameter	TS27L2BCD	TLC1078CD	TLC1078CDR	TLC1078ID	TLC1078IDR	TLC252CD	TLC252CDR
Manufacturer	STMicroelectronics	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Amplifier Type	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS
Number of Circuits	2	2	2	2	2	2	2
Package / Case	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)
Slew Rate (V/µs)	0.04	0.032	0.032	0.032	0.032	2.9	2.9
Gain Bandwidth Product (kHz)	100	110	110	110	110	2200	2200
Current - Input Bias (pA)	1	1	1	1	1	0.6	0.6
Voltage - Input Offset (mV)	1.1	0.18	0.18	0.18	0.18	1.1	1.1
Current - Supply (µA, x2 Channels)	10	29	29	29	29	1900	1900
Current - Output / Channel (mA)	45	30	30	30	30	Not specified	Not specified
Voltage - Supply Span (Min)	3 V	1.4 V	1.4 V	3 V	3 V	1.4 V	1.4 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	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C
Product Status	Obsolete	Last Time Buy	Active	Active	Active	Last Time Buy	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitute: TLC1078CDR and TLC1078IDR

The TLC1078 series (specifically TLC1078CDR and TLC1078IDR) represents the most direct substitution path for the TS27L2BCD. Both variants maintain CMOS amplifier architecture with dual-circuit configuration in identical 8-SOIC packaging. The TLC1078CDR is actively produced and available in tape-and-reel packaging, while TLC1078IDR offers extended operating temperature range (-40°C to 85°C) with active product status. Both devices are ROHS3 compliant with MSL Level 1 rating, matching the compliance profile of the original part.

The TLC1078 series exhibits marginally lower slew rate (0.032 V/µs versus 0.04 V/µs) and slightly higher gain bandwidth product (110 kHz versus 100 kHz), representing negligible performance variance for most applications. Input bias current remains at 1 pA specification. Supply voltage range compatibility spans 3 V to 16 V for both TLC1078IDR variants, with TLC1078CD/CDR supporting operation from 1.4 V minimum.

Secondary Substitute: TLC252CDR

The TLC252CDR provides an alternative for applications requiring enhanced bandwidth performance. This device maintains CMOS technology, dual-circuit configuration, and 8-SOIC packaging with active product status. The TLC252CDR exhibits significantly higher slew rate (2.9 V/µs) and gain bandwidth product (2.2 MHz), suitable for applications demanding faster signal processing. Supply current consumption increases to 1.9 mA per channel pair, representing a trade-off for improved dynamic performance. ROHS3 compliance and MSL Level 1 rating are maintained.

Product Status Considerations

The TS27L2BCD obsolete status necessitates transition to active or last-time-buy alternatives. TLC1078IDR and TLC1078CDR maintain active production status, ensuring long-term supply availability. TLC252CDR also maintains active status. These selections provide supply chain continuity and support extended product lifecycles.

Frequently Asked Questions (FAQ)

Q: Can TLC1078CDR directly replace TS27L2BCD in existing designs?

A: Yes. Both devices share identical 8-SOIC package geometry, dual-circuit CMOS amplifier architecture, and compatible supply voltage range (3 V to 16 V). Electrical parameters remain within acceptable tolerance for most applications. Pin-to-pin compatibility is maintained.

Q: What is the primary difference between TLC1078CDR and TLC1078IDR?

A: Operating temperature range differs. TLC1078CDR operates 0°C to 70°C, matching the original TS27L2BCD specification. TLC1078IDR extends to -40°C to 85°C, providing broader environmental capability. Both maintain identical electrical performance and packaging.

Q: Why does TLC252CDR have higher supply current consumption?

A: The TLC252CDR is optimized for higher bandwidth performance (2.2 MHz gain bandwidth product versus 110 kHz for TLC1078). Enhanced slew rate (2.9 V/µs) and bandwidth capability require increased quiescent current consumption (1.9 mA per channel pair versus 29 µA for TLC1078). Selection depends on application bandwidth requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All identified substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, matching the environmental and regulatory profile of the TS27L2BCD.

Q: What packaging options are available for substitute parts?

A: TLC1078CDR is supplied in tape-and-reel packaging. TLC1078ID is supplied in tube packaging. TLC1078IDR is supplied in tape-and-reel packaging. TLC252CDR is supplied in tape-and-reel packaging. All maintain identical 8-SOIC form factor.

Q: Can TLC252CDR be used in low-frequency applications designed for TS27L2BCD?

A: Yes. TLC252CDR maintains backward compatibility with lower-frequency designs. The enhanced bandwidth and slew rate do not degrade performance in applications utilizing only a portion of available specifications. However, increased supply current consumption should be evaluated in power-constrained designs.

Q: What is the inventory status of substitute parts?

A: TLC1078IDR maintains 1,320 units in stock. TLC1078ID maintains 3,315 units in stock. TLC1078CDR maintains 1,342 units in stock. TLC252CDR maintains 4,395 units in stock. All substitute parts are available in quantity for immediate procurement.

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