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LOC112

Public Made by Adom

by adom

Littelfuse IXYS Transistor, Photovoltaic Output Optoisolators, DIP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

componentoptoisolatorsloc112
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Contents

README

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LOC112

Littelfuse IXYS · Transistor, Photovoltaic Output Optoisolators · DIP-8

LOC112 from Littelfuse IXYS, 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 -LED passive LED cathode. Return-side terminal of the internal infrared emitter diode. LED forward voltage 0.9-1.4 V at IF = 2-10 mA (typ 1.2 V); reverse LED voltage rating 5 V; input control current 100 mA continuous / 1 A peak (10 ms).
2 +LED passive LED anode. Drive-side terminal of the internal infrared emitter diode used to modulate both photodiodes. Drive with 2-10 mA operating current; observe input power dissipation of 150 mW (derate 1.33 mW/°C above 25 °C).
3 C1 passive Servo (feedback/input) photodiode cathode. Together with pin 4 (A1) forms PD1, the feedback photodiode used to close the loop around the LED and cancel its nonlinear temperature/time behavior. Servo gain K1 = IC1/IF = 0.004-0.030 (typ 0.007) at IF = 2-10 mA with VC1-A1 = 15 V.
4 A1 passive Servo (feedback/input) photodiode anode. Return terminal of PD1. Dark current ID typ 1 nA, max 25 nA at IF = 0 mA, VC1-A1 = 15 V. Input/output capacitance CIO typ 3 pF.
5 A2 passive Output photodiode anode. Return terminal of PD2, the output-side photodiode whose photocurrent is linear with respect to the servoed LED current. Output side is isolated from the input by 3750 Vrms.
6 C2 passive Output photodiode cathode. Together with pin 5 (A2) forms PD2, the output photodiode. Forward gain K2 = IC2/IF = 0.004-0.030 (typ 0.007); transfer gain K3 = K2/K1 = 0.733-1.072 (K3-binned into D/E/F/G); K3 linearity ≤1%, temp coefficient ~0.005 %/°C.
7 NC unconnected No internal connection. Leave floating or tie to a convenient node for mechanical/routing purposes; do not use as a tie point for high-voltage nets since it is on the output side of the isolation barrier.
8 NC unconnected No internal connection. Leave floating; not used by the optocoupler.

Key specifications

Parameter Value
Manufacturer Littelfuse IXYS
Package DIP-8
Category Optoisolators
Pins 8

Ordering variants

Same part, different packaging or reel option.

  • LOC112
  • LOC112P
  • LOC112PTR
  • LOC112S
  • LOC112STR

CAD (KiCad official)

  • Symbol: LOC112
  • Footprint: Package_DIP:DIP-8_W7.62mm
  • 3D model: DIP-8 (KiCad packages3D, STEP)
  • 3D model files: loc112-etched.step / loc112-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); loc112.step / loc112.glb are the bare package body.

Provenance

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

  • Datasheet: Littelfuse IXYS datasheet (None pp, sha256 9e9db6ad97363102, 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