6N137-020E from Broadcom Limited, in a DIP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	NC	unconnected	No internal connection. Leave floating or optionally tie to a fixed potential; no electrical function.
2	ANODE	input	GaAsP LED anode. Drive with forward current IF = 5-15 mA (recommended 6.3-10 mA) through a current-limit resistor from the input-side logic. Forward voltage VF typ 1.5V, absolute max IF = 20 mA average.
3	CATHODE	input	GaAsP LED cathode. Return path for the input-side LED forward current; referenced to input-side ground. Reverse input voltage VR max = 5V.
4	NC	unconnected	No internal connection on the input side. Leave floating.
5	GND	power_in	Output-side ground reference. Must be bypassed to VCC (pin 8) with a 0.1-uF ceramic capacitor placed as close as possible between pins 5 and 8.
6	VO	output	Open-collector Schottky-clamped transistor output. Requires an external pull-up resistor to VCC (RL = 330 ohm to 4 kOhm). VOL typ 0.35V at IOL = 13 mA; IOH typ 5.5 uA. Truth table (positive logic): LED ON with ENABLE H -> output L; LED OFF or ENABLE L -> output H.
7	VE	input	Active-high enable input for the output detector (single-channel only). VEH >= 2.0V enables normal operation; VEL <= 0.8V forces VO high (LED-independent). No external pull-up required; if unused, tie to VCC for improved CMR. Max VE = VCC + 0.5V; IEH typ -0.7 mA.
8	VCC	power_in	Output-side positive supply. VCC = 4.5V to 5.5V recommended, 7V absolute max. Must be bypassed to GND (pin 5) with a 0.1-uF ceramic capacitor placed as close as possible between pins 5 and 8.

Key specifications

Parameter	Value
Manufacturer	Broadcom Limited
Package	DIP-8
Category	Optoisolators
Pins	8

Ordering variants

Same part, different packaging or reel option.

6N137-020E-000E
6N137-020E-300E
6N137-020E-500E
6N137-020E
6N137-020E-320E
6N137-020E-520E
6N137-020E-060E
6N137-020E-560E

CAD (KiCad official)

Symbol: 6N137-020E
Footprint: Package_DIP:DIP-8_W7.62mm
3D model: DIP-8 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Broadcom Limited datasheet (None pp, sha256 ab7ab8c3280c92c4, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF