TL084CDRE4 Equivalent & Substitute Parts

Part Overview

The TL084CDRE4 is a J-FET input operational amplifier containing four independent circuits in a 14-SOIC surface mount package. This device is manufactured by Texas Instruments and is classified as a linear amplifier. The TL084CDRE4 is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design requirements and production continuity. The part maintains ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Key Parameters

Parameter	Value
Amplifier Type	J-FET
Number of Circuits	4
Slew Rate	13 V/µs
Gain Bandwidth Product	3 MHz
Current - Input Bias	30 pA
Voltage - Input Offset	3 mV
Current - Supply	1.4 mA (x4 Channels)
Current - Output / Channel	10 mA
Voltage - Supply Span (Min)	10 V
Voltage - Supply Span (Max)	30 V
Operating Temperature	0°C ~ 70°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

Substitution of the TL084CDRE4 is determined by the following critical parameters:

Primary Substitution Criteria:

Amplifier Type: J-FET input configuration
Number of Circuits: 4 independent operational amplifiers
Package Type: 14-SOIC surface mount form factor
Mounting Type: Surface mount compatibility
Supply Voltage Range: Minimum 10 V to maximum 30 V operation

Secondary Compatibility Parameters:

Slew Rate: 13 V/µs or greater
Gain Bandwidth Product: 3 MHz or greater
Input Bias Current: 30 pA or lower
Input Offset Voltage: 3 mV or lower
Output Current per Channel: 10 mA or greater
Supply Current: 1.4 mA per channel or lower

Substitute parts must maintain electrical compatibility within the specified supply voltage range and preserve the four-circuit configuration in the 14-SOIC package. Parts with enhanced performance characteristics (higher slew rate, greater bandwidth, lower input bias current, or higher output current) are acceptable substitutes provided they operate within the original supply voltage specifications or offer extended range capability.

Parameter Comparison

Part Number	Manufacturer	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (mV)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Status
TL084CDRE4	Texas Instruments	13	3	30	3	10	10	30	0 ~ 70	Discontinued
TL084CDR	Texas Instruments	13	3	30	3	10	10	30	0 ~ 70	Active
LF247DT	STMicroelectronics	16	4	20	3	40	22	22	-40 ~ 105	Active
LF347D	STMicroelectronics	16	3	20	3	40	22	22	0 ~ 70	Active
LF347DT	STMicroelectronics	16	4	20	3	40	22	22	0 ~ 70	Active
TL074IYDT	STMicroelectronics	13	3	20	3	40	6	36	-40 ~ 105	Active
TL084ACDT	STMicroelectronics	16	4	20	3	40	6	36	0 ~ 70	Active
TL084AIDT	STMicroelectronics	16	4	20	3	40	6	36	-40 ~ 105	Active
TL084BCDT	STMicroelectronics	16	4	20	1	40	6	36	0 ~ 70	Active
TL084BIDT	STMicroelectronics	16	4	20	1	40	6	36	-40 ~ 105	Active
TL084CD	STMicroelectronics	16	3	30	3	10	6	36	0 ~ 70	Active

Engineering Selection Recommendations

Primary Substitute - Direct Replacement:

TL084CDR is the recommended primary substitute for TL084CDRE4. Both parts are manufactured by Texas Instruments and share identical electrical specifications including slew rate (13 V/µs), gain bandwidth product (3 MHz), input bias current (30 pA), input offset voltage (3 mV), and output current (10 mA). The supply voltage range (10 V to 30 V) and operating temperature range (0°C to 70°C) are identical. TL084CDR is currently in active production status with substantial inventory availability (169,460 units), ensuring supply continuity. Both parts maintain ROHS3 compliance and MSL 1 rating.

Secondary Substitutes - Enhanced Performance:

TL084ACDT, TL084AIDT, TL084BCDT, and TL084BIDT offer enhanced electrical performance with higher slew rate (16 V/µs), greater gain bandwidth product (4 MHz), lower input bias current (20 pA), and higher output current (40 mA). These parts feature extended supply voltage range (6 V to 36 V), providing broader operational flexibility. TL084ACDT and TL084BCDT maintain the 0°C to 70°C temperature range, while TL084AIDT and TL084BIDT extend to -40°C to 105°C. All four variants carry AEC-Q100 automotive qualification. TL084BCDT and TL084BIDT offer superior input offset voltage specification (1 mV versus 3 mV).

Alternative Substitutes - Cross-Manufacturer Options:

LF347DT and LF347D (STMicroelectronics) provide enhanced performance with 16 V/µs slew rate and 4 MHz bandwidth. However, these parts operate at fixed 22 V supply (±11 V), which differs from the original 10 V to 30 V range. LF247DT similarly features enhanced specifications but with fixed 44 V supply specification. TL074IYDT offers matching slew rate and bandwidth to the original part with extended supply range (6 V to 36 V) and lower input bias current (20 pA), with temperature range extending to -40°C to 105°C.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and MSL 1 rating consistent with the original TL084CDRE4. Parts designated with automotive grade (TL084ACDT, TL084AIDT, TL084BCDT, TL084BIDT, TL084CD) carry AEC-Q100 qualification. Selection should prioritize parts with active production status to ensure long-term availability.

Frequently Asked Questions (FAQ)

Q: Can TL084CDR directly replace TL084CDRE4 without circuit modification?

A: Yes. TL084CDR is electrically and mechanically identical to TL084CDRE4. Both parts share the same slew rate (13 V/µs), gain bandwidth product (3 MHz), input bias current (30 pA), input offset voltage (3 mV), output current (10 mA), supply voltage range (10 V to 30 V), and operating temperature range (0°C to 70°C). The 14-SOIC package and pinout are identical. No circuit modifications are required.

Q: What is the difference between TL084ACDT and TL084BCDT?

A: Both parts share identical slew rate (16 V/µs), gain bandwidth product (4 MHz), input bias current (20 pA), supply voltage range (6 V to 36 V), and operating temperature range (0°C to 70°C). The primary difference is input offset voltage specification: TL084ACDT specifies 3 mV maximum, while TL084BCDT specifies 1 mV maximum. TL084BCDT provides tighter offset voltage tolerance for applications requiring enhanced precision.

Q: Why do LF247DT and LF347DT show different supply voltage specifications?

A: LF247DT and LF347DT are specified with fixed 22 V and 44 V supply voltages respectively, representing ±11 V and ±22 V dual supply configurations. These differ from the original TL084CDRE4 single supply range of 10 V to 30 V. Application of these parts requires verification that the circuit design accommodates the specified supply voltage configuration.

Q: Are all substitute parts available in 14-SOIC package?

A: Yes. All listed substitute parts are available in 14-SOIC (0.154", 3.90mm width) surface mount package, maintaining mechanical compatibility with the original TL084CDRE4. Packaging options vary (Cut Tape, Digi-Reel, Tube) but the physical package form factor remains consistent.

Q: Which substitute offers the best performance improvement over TL084CDRE4?

A: TL084AIDT and TL084BIDT offer the most comprehensive performance enhancement: slew rate increased from 13 V/µs to 16 V/µs, gain bandwidth product increased from 3 MHz to 4 MHz, input bias current reduced from 30 pA to 20 pA, output current increased from 10 mA to 40 mA, and operating temperature range extended from 0°C to 70°C to -40°C to 105°C. Supply voltage range is also extended from 10 V to 30 V to 6 V to 36 V. TL084BIDT additionally specifies 1 mV input offset voltage versus 3 mV.

Q: Is automotive qualification required for my application?

A: Automotive qualification (AEC-Q100) is required only for applications subject to automotive industry standards. TL084ACDT, TL084AIDT, TL084BCDT, TL084BIDT, and TL084CD carry AEC-Q100 qualification. Non-automotive applications may select from any listed substitute based on electrical performance requirements and supply voltage compatibility.

Q: What is the inventory status of substitute parts?

A: TL084CDR maintains the highest inventory (169,460 units). TL084ACDT has 888,600 units available. LF347DT has 27,321 units. LF347D has 16,726 units. LF247DT has 17,352 units. TL084BIDT has 7,520 units. TL084AIDT has 5,400 units. TL074IYDT has 4,059 units. TL084CD has 3,600 units. TL084BCDT has 2,936 units. All parts are listed as new original stock.

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