MC5534

1 circuit uses this part.

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 5), 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
NE5534	bipolar	10–30 V	10 MHz	13 V/µs	4 nV	4 mA	44

Compensated for a gain of 3 or more; below that it needs a capacitor (22 pF) between pins 5 and 8.

Fits the same socket

Part	Input	Supply	GBW	Slew	Noise	Iq	Boards	Differs
LM308	bipolar	10–36 V				0.3 mA	96	needs a compensation capacitor across pins 1 and 8. Needs a compensation capacitor (30 pF typical) between pins 1 and 8; the cap sets slew rate and tone.
OPA134	JFET	5–36 V	8 MHz	20 V/µs	8 nV	4 mA	3	JFET input; internally compensated: the board's capacitor across pins 5 and 8 no longer shapes the tone; pins 1, 5, 8 are NC (1 and 5 do not connect, 8 no internal connection). FET-input audio op-amp with no offset null; leave pins 1, 5 and 8 unconnected.
LF356	JFET	?–36 V	5 MHz	12 V/µs	12 nV	5 mA	14	JFET input; internally compensated: the board's capacitor across pins 5 and 8 no longer shapes the tone; pins 1, 5, 8 are offset null (1, 5), NC (8). JFET single drawing about 5 mA; specified at ±15 V.
LM301A	bipolar	10–36 V		1 V/µs		1.8 mA	23	needs a compensation capacitor across pins 1 and 8; much slower. Externally compensated: needs a capacitor (30 pF for unity gain) between pins 1 and 8, and the value sets its slew and treble response in fuzz and distortion circuits.
TL051	JFET	10–30 V	4.5 MHz	17.8 V/µs	10.8 nV	2.1 mA	8	JFET input; internally compensated: the board's capacitor across pins 5 and 8 no longer shapes the tone; pins 1, 5, 8 are NC. Trimmed-offset upgrade for the TL071/TL081; pins 1, 5 and 8 are no-connect in this revision.
OPA604AP	JFET	9–48 V	20 MHz	25 V/µs	11 nV	5.3 mA	4	JFET input; internally compensated: the board's capacitor across pins 5 and 8 no longer shapes the tone; pins 1, 5, 8 are offset trim (1, 5), NC (8). FET-input audio op-amp that runs to ±24 V but draws about 5.3 mA.
CA3130	mosfet, RR out	5–16 V	4 MHz	10 V/µs		10 mA	54	MOSFET input; needs a compensation capacitor across pins 1 and 8; 16 V max, not for 18 V; input range reaches the negative rail; rail-to-rail output. Needs a 47 pF capacitor between pins 1 and 8 for unity-gain stability (15 MHz uncompensated) and is limited to 16 V total supply.
TL071	JFET	4.5–40 V	5.25 MHz	20 V/µs	37 nV	1.4 mA	178	JFET input; internally compensated: the board's capacitor across pins 5 and 8 no longer shapes the tone; pins 1, 5, 8 are NC (offset null on pins 1 and 5 only in the PS package). JFET input; this revision shows pins 1, 5 and 8 as no-connect on the DIP, so no offset trim.
TL081	JFET	4.5–40 V	5.25 MHz	20 V/µs	37 nV	1.4 mA	20	JFET input; internally compensated: the board's capacitor across pins 5 and 8 no longer shapes the tone; pins 1, 5, 8 are NC (offset null on pins 1 and 5 only in the PS package). JFET input; this revision shows no offset-null pins on the DIP.
CA3140	mosfet	4–36 V	4.5 MHz	9 V/µs	40 nV	4 mA	12	MOSFET input; internally compensated: the board's capacitor across pins 5 and 8 no longer shapes the tone; pins 1, 5, 8 are offset null (1, 5), strobe (8); input range reaches the negative rail. MOSFET input that reaches 0.5 V below the negative rail, internally compensated; draws about 4 mA.

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Roland Juno 106 2764 · 2SC945 · 4050 · 4051 Roland Juno 106	Roland Juno 106	Ring Mod / Synth	Experimentalists Anonymous	—	—	—	371