TL3474IN Equivalent & Substitute Parts

Part Overview

The TL3474IN is a general-purpose operational amplifier integrated circuit manufactured by Texas Instruments, featuring four independent amplifier circuits in a 14-pin DIP package. This device is rated for Last Time Buy status, indicating discontinued production with limited inventory availability. The TL3474IN operates across a wide supply voltage range of 4V to 36V and maintains performance across industrial temperature ranges from -40°C to 105°C. Identification of equivalent and substitute parts is necessary due to product discontinuation and to support design flexibility across different packaging technologies and manufacturing sources.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Slew Rate	13	V/µs
Gain Bandwidth Product	4	MHz
Current - Input Bias	100	nA
Voltage - Input Offset	1	mV
Current - Supply (Total)	3.5	mA (x4 Channels)
Current - Output / Channel	34	mA
Voltage - Supply Span (Min)	4	V
Voltage - Supply Span (Max)	36	V
Operating Temperature Range	-40 to 105	°C
Mounting Type	Through Hole	—
Package / Case	14-DIP (0.300", 7.62mm)	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the TL3474IN is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Number of circuits (4 independent amplifiers required)
Slew rate performance (13V/µs baseline)
Gain bandwidth product (4 MHz baseline)
Input bias current (100 nA baseline)
Input offset voltage (1 mV baseline)
Supply current per channel (3.5 mA baseline)
Output current capability per channel (34 mA baseline)
Supply voltage range (4V to 36V minimum required)
Operating temperature range (-40°C to 105°C minimum required)

Mechanical Compatibility Criteria:

Package type (14-pin DIP through-hole mounting)
Pin configuration (14-PDIP standard)
Physical dimensions (0.300" width, 7.62mm pitch)

Regulatory Compliance:

RoHS3 compliance
REACH unaffected status
ECCN EAR99 classification

Substitute parts are grouped into two categories: direct pin-compatible replacements with identical electrical specifications, and functional equivalents with modified electrical characteristics that remain within acceptable operating parameters for general-purpose amplifier applications.

Parameter Comparison

Parameter	TL3474IN	TL3474IDR	AD713JNZ	KA324A	LT1058CN#PBF	OP470GPZ
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices Inc.	Fairchild Semiconductor	Analog Devices Inc.	Analog Devices Inc.
Amplifier Type	General Purpose	General Purpose	J-FET	General Purpose	J-FET	General Purpose
Number of Circuits	4	4	4	4	4	4
Slew Rate (V/µs)	13	13	20	—	13	3
Gain Bandwidth Product (MHz)	4	4	4	—	5	6
Current - Input Bias (nA)	100	100	0.01	40	0.007	15
Voltage - Input Offset (mV)	1	1	0.3	1.5	0.25	0.4
Current - Supply (mA)	3.5	3.5	10	1.5	1.7	9
Current - Output / Channel (mA)	34	34	25	40	—	—
Voltage - Supply Span Min (V)	4	4	9	3	20	9
Voltage - Supply Span Max (V)	36	36	36	32	36	36
Operating Temperature (°C)	-40 to 105	-40 to 105	0 to 70	0 to 70	0 to 70	-40 to 85
Mounting Type	Through Hole	Surface Mount	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	14-DIP	14-SOIC	14-DIP	14-DIP	14-DIP	14-DIP
Product Status	Last Time Buy	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	—	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

TL3474IDR (Texas Instruments)

The TL3474IDR is the manufacturer-recommended direct electrical equivalent of the TL3474IN, maintaining identical electrical specifications including slew rate, gain bandwidth product, input bias current, and supply current characteristics. The primary distinction is packaging format: TL3474IDR uses 14-SOIC surface-mount technology versus the through-hole 14-DIP of the TL3474IN. This substitute is appropriate for new designs utilizing surface-mount assembly processes. Both devices maintain ROHS3 compliance and active product status. The TL3474IDR offers significantly higher inventory availability (29,375 units) compared to the TL3474IN (2,100 units).

AD713JNZ (Analog Devices Inc.)

The AD713JNZ is a J-FET input operational amplifier with four circuits in 14-DIP through-hole packaging, providing pin-compatible mechanical substitution. Electrical differences include superior slew rate performance (20V/µs versus 13V/µs) and significantly lower input bias current (10 pA versus 100 nA). The AD713JNZ requires minimum supply voltage of 9V compared to 4V for the TL3474IN, and operates within a reduced temperature range (0°C to 70°C versus -40°C to 105°C). This substitute is suitable for applications requiring lower input bias current and higher slew rate performance, provided supply voltage and temperature requirements are compatible.

KA324A (Fairchild Semiconductor)

The KA324A is a general-purpose four-circuit amplifier in 14-DIP through-hole packaging with pin-compatible mechanical configuration. This device features lower supply current (1.5 mA versus 3.5 mA) and higher output current capability (40 mA versus 34 mA per channel). The KA324A operates with minimum supply voltage of 3V and maximum of 32V, with operating temperature range of 0°C to 70°C. Slew rate specification is not provided. This substitute is appropriate for low-power applications with reduced temperature requirements.

LT1058CN#PBF (Analog Devices Inc., LT® Series)

The LT1058CN#PBF is a J-FET input operational amplifier with four circuits in 14-DIP through-hole packaging. This device provides superior input bias current performance (7 pA versus 100 nA) and lower input offset voltage (250 µV versus 1 mV). The LT1058CN#PBF requires minimum supply voltage of 20V and operates within temperature range of 0°C to 70°C. Gain bandwidth product is 5 MHz versus 4 MHz for the TL3474IN. This substitute is suitable for precision applications requiring extremely low input bias current, provided supply voltage and temperature requirements are met.

OP470GPZ (Analog Devices Inc.)

The OP470GPZ is a general-purpose four-circuit amplifier in 14-DIP through-hole packaging with pin-compatible mechanical configuration. This device features lower slew rate (3V/µs versus 13V/µs) and higher gain bandwidth product (6 MHz versus 4 MHz). Supply current is elevated at 9 mA versus 3.5 mA. The OP470GPZ operates with minimum supply voltage of 9V and temperature range of -40°C to 85°C. This substitute is appropriate for applications prioritizing bandwidth performance over slew rate, with compatible supply voltage and temperature requirements.

Frequently Asked Questions (FAQ)

Q: Can TL3474IDR be used as a direct replacement for TL3474IN in existing through-hole PCB designs?

A: No. The TL3474IDR uses 14-SOIC surface-mount packaging (0.154" width) while the TL3474IN uses 14-DIP through-hole packaging (0.300" width). Physical pin spacing and mounting methods are incompatible. Through-hole designs require a substitute with 14-DIP packaging such as AD713JNZ, KA324A, LT1058CN#PBF, or OP470GPZ.

Q: What are the key electrical differences between the TL3474IN and AD713JNZ?

A: The AD713JNZ features J-FET input technology providing lower input bias current (10 pA versus 100 nA) and higher slew rate (20V/µs versus 13V/µs). However, the AD713JNZ requires minimum supply voltage of 9V compared to 4V for the TL3474IN, and operates within reduced temperature range (0°C to 70°C versus -40°C to 105°C). Electrical substitution is valid only when application supply voltage and temperature requirements are compatible with these specifications.

Q: Is the TL3474IN suitable for low-power applications?

A: The TL3474IN consumes 3.5 mA total supply current across four channels. For applications requiring lower power consumption, the KA324A (1.5 mA) or LT1058CN#PBF (1.7 mA) provide reduced supply current. Selection depends on compatibility with other electrical and temperature requirements.

Q: What is the significance of the TL3474IN being marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of the TL3474IN. Existing inventory is limited (2,100 units). For new designs or long-term production requirements, selection of an active-status substitute part is necessary. The TL3474IDR (active status, 29,375 units available) is the manufacturer-recommended alternative for new designs.

Q: Can J-FET input amplifiers (AD713JNZ, LT1058CN#PBF) be substituted for the bipolar input TL3474IN?

A: J-FET input amplifiers provide superior input bias current performance but introduce different electrical characteristics including modified input offset voltage, slew rate, and supply voltage requirements. Substitution is valid only when application circuit design accommodates these electrical differences and when supply voltage and temperature ranges are compatible. Direct pin-for-pin substitution without circuit analysis is not recommended.

Q: What packaging options are available for TL3474 equivalent amplifiers?

A: The TL3474 base product is available in two packaging formats: 14-DIP through-hole (TL3474IN, AD713JNZ, KA324A, LT1058CN#PBF, OP470GPZ) and 14-SOIC surface-mount (TL3474IDR). Selection depends on PCB assembly technology and design requirements.

Q: Are all substitute parts RoHS3 compliant?

A: The TL3474IN, TL3474IDR, AD713JNZ, LT1058CN#PBF, and OP470GPZ are all ROHS3 compliant. The KA324A RoHS status is not specified in available documentation. Compliance verification is required for applications with regulatory requirements.

Q: What is the minimum supply voltage requirement for each substitute?

A: TL3474IN and TL3474IDR: 4V minimum. AD713JNZ and OP470GPZ: 9V minimum. KA324A: 3V minimum. LT1058CN#PBF: 20V minimum. Application supply voltage must meet or exceed the substitute part's minimum requirement.

Q: Which substitute provides the best input offset voltage performance?

A: The LT1058CN#PBF provides the lowest input offset voltage at 250 µV, followed by AD713JNZ at 300 µV. The TL3474IN and KA324A specify 1 mV and 1.5 mV respectively. Selection depends on application precision requirements and compatibility with other electrical specifications.

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