Parts · ICs
TL084
Quad JFET-Input Op-Amp DIP-14 / SOIC-14.15 circuits use this part.
Datasheet · from ti.com
Substitutes same socket
Parts that fit the same socket: the same function, pin count and pinout. The figures are read off each part's datasheet (this one's from page 14), typical where the sheet gives a typical value, otherwise the maximum. Closest first; the last column says what differs. A different part can change the sound, and a circuit may lean on one particular figure, so read the build document's notes before you swap.
This part
| Part | Input | Supply | GBW | Slew | Noise | Iq | Boards |
|---|---|---|---|---|---|---|---|
| TL084 | JFET | 4.5–40 V | 5.25 MHz | 20 V/µs | 37 nV | 1.4 mA | 15 |
JFET quad; inputs must stay 4 V above the negative rail.
Fits the same socket
| Part | Input | Supply | GBW | Slew | Noise | Iq | Boards | Differs |
|---|---|---|---|---|---|---|---|---|
| TL074 | JFET | 4.5–40 V | 5.25 MHz | 20 V/µs | 37 nV | 1.4 mA | 315 | JFET input; inputs must stay 4 V above the negative rail. |
| LF347 | JFET | 7–36 V | 3 MHz | 13 V/µs | 18 nV | 2 mA | 20 | JFET quad; common-mode range must stay 4 V inside each rail. |
| TL974 | RR out | 2.7–12 V | 10.6 MHz | 2.48 mA | 1 | 12 V max, not for 18 V; rail-to-rail output. Low-noise quad (4.4 nV/√Hz at 100 kHz) limited to 12 V total; it will not survive an 18 V rail. | ||
| TLE2074 | 4.5–38 V | 10.6 MHz | 32 V/µs | 17 nV | 2.4 mA | 20 | Fast, low-bias quad drawing about 2.4 mA per amplifier; the input range reaches the positive rail but stops 4 V above the negative one. | |
| TL064 | JFET | 10–30 V | 1 MHz | 3.5 V/µs | 30 nV | 0.2 mA | 17 | rated from 10 V; much slower. Low-power JFET quad at 200 µA per amplifier. |
| MC33179 | bipolar | 4–36 V | 5 MHz | 2 V/µs | 7.5 nV | 0.425 mA | 2 | bipolar input; much slower. Quad version of the MC33178 in the standard quad pinout. |
| TLC2274 | CMOS, RR out | 4.4–16 V | 2.25 MHz | 3.6 V/µs | 9 nV | 1.2 mA | 1 | CMOS input; 16 V max, not for 18 V; input range reaches the negative rail; rail-to-rail output; much slower. CMOS rail-to-rail-output quad limited to 16 V total. |
| LF444 | JFET | ?–36 V | 1 MHz | 1 V/µs | 35 nV | 0.15 mA | 4 | much slower. Low-power JFET quad at about 150 µA per amplifier. |
| TLC27M4AIN | CMOS | 3–16 V | 1.1 MHz | 4.5 V/µs | 32 nV | 0.06 mA | 8 | CMOS input; 16 V max, not for 18 V; input range reaches the negative rail; much slower. Low-power CMOS quad limited to 16 V; the input range includes the negative rail (single-supply friendly). |
| LMC660CN | CMOS, RR out | 4.75–15.5 V | 1.4 MHz | 1.1 V/µs | 22 nV | 0.4 mA | 4 | CMOS input; 15.5 V max, not for 18 V; input range reaches the negative rail; rail-to-rail output; much slower. CMOS quad limited to 15.5 V total; rail-to-rail output and an input range that includes ground. |
| Faceplate | Circuit | Based on | Category | Vendor | Box | Knobs | Price | BOM |
|---|---|---|---|---|---|---|---|---|
| Trip Hazard 2 Disruption Pedal Vero17×22 Unverified LF353 · LF353N · TL084 · VTL5C1 Trip Hazard 2 Disruption Pedal | Trip Hazard 2 Disruption Pedal | Compressor | Dirtbox Layouts | — | 2 | — | 22 | |
| 4007 Based VCF CD4007 · CD4007UB · TL084 | — | Other | Experimentalists Anonymous | — | — | — | 22 | |
| Basic Saw VCO 2N4391 · CA3140 · LM319 · MAT04 | — | Ring Mod / Synth | Experimentalists Anonymous | — | 2 | — | 34 | |
| Buchla 291 Bandpass VCF 2N3566 · NE5534 · TL082 · TL084 | — | Other | Experimentalists Anonymous | — | — | — | 76 | |
| Dual ADSR 2N3904 · 4066 · 4093 · CD4066 | — | Wah / Envelope | Experimentalists Anonymous | — | 4 | — | 20 | |
| Elektor Harmonic Enhancer 4093 · 7815 · 7915 · BC547B | — | EQ / Filter | Experimentalists Anonymous | — | — | — | 111 | |
| Guitar Frequency doubleur 2N3820 · BF245 · CA3080 · S042P | — | Vibrato / Chorus | Experimentalists Anonymous | — | — | — | 70 | |
| OA Based VCF CA3080 · TL084 | — | Other | Experimentalists Anonymous | — | — | — | 33 | |
| Oberheim OB8 1458 · 2N3905 · 3080 · 40109 | — | Ring Mod / Synth | Experimentalists Anonymous | — | — | — | 688 | |
| Oberheim XPander 2764 · 4053 · 6264 · 68B09 | — | Ring Mod / Synth | Experimentalists Anonymous | — | — | — | 103 | |
| Saw Waveshaper 2N3904 · 2N3906 · CA3080 · LM319 | — | Ring Mod / Synth | Experimentalists Anonymous | — | 1 | — | 43 | |
| Simple Op Amp Envelope Follower TL084 | — | Wah / Envelope | Experimentalists Anonymous | — | — | — | 7 | |
| Sine to Pulse 4093 · CD4093 · TL084 | — | Ring Mod / Synth | Experimentalists Anonymous | — | 2 | — | 8 | |
| Sine to Pulse 4093 · CD4093 · TL084 | — | Ring Mod / Synth | Experimentalists Anonymous | — | 2 | — | 8 | |
| Revolution Deux Mixer/Switching System BS170 · TL084 Fred Briggs Mixer/Switching System | Fred Briggs Mixer/Switching System | Utility | Revolution Deux | — | 3 | — | 35 |