TS1874ID Equivalent & Substitute Parts

Part Overview

The TS1874ID is a general-purpose operational amplifier manufactured by STMicroelectronics, configured as a 4-circuit rail-to-rail amplifier in a 14-SOIC surface mount package. This device is classified as obsolete, indicating that STMicroelectronics has discontinued production and support. 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 amplifier topology.

Key Parameters

Parameter	TS1874ID Value
Manufacturer	STMicroelectronics
Amplifier Type	General Purpose
Number of Circuits	4
Output Type	Rail-to-Rail
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Slew Rate	0.6 V/µs
Gain Bandwidth Product	1.8 MHz
Current - Input Bias	70 nA
Voltage - Input Offset	100 µV
Current - Supply	500 µA (x4 Channels)
Current - Output / Channel	80 mA
Voltage - Supply Span (Min)	1.8 V
Voltage - Supply Span (Max)	6 V
Operating Temperature	-40°C ~ 125°C
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the TS1874ID is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Number of circuits: 4 channels
Output type: Rail-to-rail configuration
Package type: 14-SOIC surface mount (0.154", 3.90mm width)
Operating temperature range: -40°C to 125°C
Mounting type: Surface mount

Secondary Compatibility Parameters:

Voltage supply span compatibility (minimum 1.8 V to maximum 6 V operation)
Current output capability per channel (minimum 80 mA required)
Input bias current characteristics
Slew rate and gain bandwidth product performance envelope

The substitute parts listed below maintain the core functional topology (4-circuit rail-to-rail amplifier in 14-SOIC package) while offering variations in amplifier type (general purpose versus CMOS), performance characteristics, and compliance status. All substitute parts are active products with current manufacturing support.

Parameter Comparison

Parameter	TS1874ID	AD8544ARZ	AD8544ARZ-REEL7	LMV344IDR	LMV934MA/NOPB	LMV934MAX/NOPB	TLV2474ID	TLV2474IDR
Manufacturer	STMicroelectronics	Analog Devices Inc.	Analog Devices Inc.	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Amplifier Type	General Purpose	General Purpose	General Purpose	CMOS	General Purpose	General Purpose	CMOS	CMOS
Number of Circuits	4	4	4	4	4	4	4	4
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Package / Case	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
Slew Rate (V/µs)	0.6	0.92	0.92	1	0.42	0.42	1.5	1.5
Gain Bandwidth Product (MHz)	1.8	1	1	1	1.5	1.5	2.8	2.8
Current - Input Bias (nA/pA)	70 nA	4 pA	4 pA	1 pA	14 nA	14 nA	2.5 pA	2.5 pA
Voltage - Input Offset (µV/mV)	100 µV	1 mV	1 mV	250 µV	1 mV	1 mV	250 µV	250 µV
Current - Supply (µA x4 Channels)	500	45	45	107	116	116	600	600
Current - Output / Channel (mA)	80	30	30	113	100	100	35	35
Voltage - Supply Span Min (V)	1.8	2.7	2.7	2.5	1.8	1.8	2.7	2.7
Voltage - Supply Span Max (V)	6	5.5	5.5	5.5	5.5	5.5	6	6
Operating Temperature (°C)	-40 ~ 125	-40 ~ 125	-40 ~ 125	-40 ~ 125	-40 ~ 125	-40 ~ 125	-40 ~ 125	-40 ~ 125
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

The LMV934MAX/NOPB and LMV934MA/NOPB represent the closest functional equivalents to the TS1874ID. Both devices maintain the 1.8 V minimum supply voltage specification of the original part, ensuring compatibility with low-voltage applications. These general-purpose amplifiers provide 100 mA output current per channel, exceeding the TS1874ID requirement of 80 mA. Both parts are active products with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Secondary Substitutes (Functional Equivalents with Trade-offs):

The AD8544ARZ and AD8544ARZ-REEL7 (Analog Devices) offer superior input bias current characteristics (4 pA versus 70 nA) and higher slew rate (0.92 V/µs), but operate with a minimum supply voltage of 2.7 V, restricting use in applications requiring 1.8 V operation. These devices are active products with ROHS3 compliance.

The TLV2474ID and TLV2474IDR (Texas Instruments) provide the highest gain bandwidth product (2.8 MHz) and slew rate (1.5 V/µs) among all substitutes, supporting applications requiring enhanced frequency response. However, these CMOS amplifiers consume 600 µA total supply current and provide only 35 mA output per channel, making them unsuitable for high-current output applications. Both are active products with ROHS3 compliance and operate within the 2.7 V to 6 V supply range.

The LMV344IDR (Texas Instruments) offers the highest output current capability (113 mA per channel) and lowest input bias current (1 pA), with a minimum supply voltage of 2.5 V. This CMOS device is suitable for applications requiring high output drive capability.

Compliance Considerations:

All substitute parts are ROHS3 compliant, addressing the non-compliance status of the obsolete TS1874ID. Selection should prioritize active products with established manufacturing support and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can the LMV934MAX/NOPB directly replace the TS1874ID in existing designs?

A: The LMV934MAX/NOPB maintains electrical and mechanical compatibility with the TS1874ID. Both devices operate across the 1.8 V to 5.5 V supply range, feature 4-circuit rail-to-rail amplifier topology in 14-SOIC packaging, and support the -40°C to 125°C operating temperature range. The LMV934MAX/NOPB provides superior output current capability (100 mA versus 80 mA per channel). Pin-to-pin compatibility and functional equivalence support direct substitution in most applications.

Q: What is the primary limitation of the AD8544ARZ as a substitute?

A: The AD8544ARZ operates with a minimum supply voltage of 2.7 V, compared to the TS1874ID minimum of 1.8 V. Applications requiring operation below 2.7 V cannot use this substitute. Additionally, the AD8544ARZ provides only 30 mA output current per channel, which is insufficient for applications requiring the TS1874ID's 80 mA capability.

Q: Why do the TLV2474ID and TLV2474IDR have higher supply current consumption?

A: The TLV2474 series utilizes CMOS amplifier architecture with enhanced frequency response characteristics (2.8 MHz gain bandwidth product and 1.5 V/µs slew rate). This performance enhancement results in higher quiescent current consumption (600 µA total) compared to the TS1874ID (500 µA total). The trade-off between power consumption and bandwidth performance must be evaluated against application requirements.

Q: Are all substitute parts available in the same packaging options as the TS1874ID?

A: All substitute parts are available in 14-SOIC surface mount packaging with identical physical dimensions (0.154", 3.90mm width). Packaging options vary by part number: some are supplied in tubes, while others are available in cut tape and digi-reel formats. Verify packaging availability with the supplier for specific procurement requirements.

Q: Which substitute provides the best low-voltage performance?

A: The LMV934MAX/NOPB and LMV934MA/NOPB maintain the 1.8 V minimum supply voltage specification of the TS1874ID, making them the only substitutes suitable for applications requiring operation below 2.7 V. Both devices are active products with established supply chain support.

Q: What is the significance of ROHS3 compliance for substitute selection?

A: All substitute parts are ROHS3 compliant, whereas the TS1874ID is RoHS non-compliant. ROHS3 compliance indicates conformance to current environmental and hazardous substance restrictions, supporting regulatory requirements for new designs and manufacturing processes. Selection of ROHS3-compliant substitutes ensures alignment with modern procurement and environmental standards.

Q: Can the LMV344IDR be used in applications requiring high output current?

A: Yes. The LMV344IDR provides 113 mA output current per channel, the highest among all substitutes listed. This CMOS device is suitable for applications requiring high-current output capability. However, the minimum supply voltage is 2.5 V, restricting use in applications requiring 1.8 V operation.

Q: How do input bias current differences affect circuit design?

A: The TS1874ID exhibits 70 nA input bias current, while substitutes range from 1 pA (LMV344IDR) to 4 pA (AD8544ARZ series). Lower input bias current reduces errors in high-impedance circuits and precision measurement applications. For general-purpose applications with moderate impedance levels, input bias current differences are typically negligible. High-impedance applications should prioritize substitutes with lower input bias current specifications.

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