UPC4558

Dual BJT-Input Op-Amp DIP-8 / SOIC-8.1 circuit uses 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 6), 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
4558	bipolar	10–30 V	4 MHz	2.2 V/µs	7 nV	1.25 mA	1164

Bipolar input with about 80 nA bias current, so it needs a DC bias path on each input.

Fits the same socket

Part	Input	Supply	GBW	Slew	Noise	Iq	Boards	Differs
4559	bipolar	?–36 V	4 MHz	2 V/µs		1.65 mA	29	Audio dual with stronger output drive than a 4558 (±10 V into 600 Ω).
MC33178	bipolar	4–36 V	5 MHz	2 V/µs	7.5 nV	0.42 mA	35	Low-noise bipolar dual that draws only about 0.42 mA per amplifier and drives 600 ohm loads.
NJM4565D	bipolar	8–36 V	10 MHz	4 V/µs		2.25 mA	2	Drives 20 V peak-to-peak into 400 Ω; the DIP8 (NJM4565D) is listed as discontinued.
NJM2100	bipolar	2–7 V	12 MHz	4 V/µs		1.75 mA	1	7 V max, not for 18 V. Low-voltage dual op-amp rated to ±3.5 V (7 V total), so it cannot run straight from 9 V.
M5218		4–32 V	7 MHz	3 V/µs		1.5 mA	21	Low-noise audio dual the maker calls close to the 4558 and 4559, with ±50 mA load current.
NE5532	bipolar	10–30 V	12 MHz	5 V/µs	5 nV	3 mA	155	Low noise and strong output drive, but draws about 3 mA per amplifier and has 200 nA bias current.
M5216		4–32 V	10 MHz	3 V/µs		2.25 mA	4	High-current dual (±100 mA load) meant for headphone drivers.
4580	bipolar	4–36 V	15 MHz	5 V/µs		3 mA	103	Low-noise, high-output-current audio dual from ±2 V; the DIP8 (NJM4580D) is listed as discontinued.
UPC4570	bipolar	8–32 V	15 MHz	7 V/µs		2.5 mA	5	Low-noise, wideband audio dual; needs at least ±4 V (8 V) supply.
TLC2272	CMOS, RR out	4.4–16 V	2.25 MHz	3.6 V/µs	9 nV	1.2 mA	20	CMOS input; 16 V max, not for 18 V; input range reaches the negative rail; rail-to-rail output. CMOS rail-to-rail-output dual limited to 16 V total; do not run it on an 18 V rail.

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Roland TR-606 2SB586 · 2SB647C · 2SC2021/2SA937 · 2SC945/2SA733 Roland TR-606	Roland TR-606	Ring Mod / Synth	Experimentalists Anonymous	—	8	—	659