LTV-3223 from Lite On, 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	Cathode	passive	LED cathode on the input (control) side. Tied internally with pins 3 and 4. Drive the LED with IF up to 50 mA (VF ~1.2 V typ, 1.3 V max at IF=20 mA) to activate the phototriac and turn on the output.
2	Anode	passive	LED anode on the input (control) side. Apply forward current (typ 5-20 mA) through a series resistor to trigger the output triac. Reverse voltage must not exceed 6 V.
3	Cathode	passive	LED cathode connection, internally tied to pins 1 and 4. Provided for PCB layout flexibility on the input side of the SSR.
4	Cathode	passive	LED cathode connection, internally tied to pins 1 and 3. Provided for PCB layout flexibility on the input side of the SSR.
5	Gate	passive	Main triac gate terminal on the output (load) side. Internally driven by the phototriac detector; typically brought out for optional snubber/gate network on high dv/dt loads (dv/dt min 200 V/µs).
6	Output	passive	Main terminal of the output triac (MT1/MT2). Handles the AC load; rated 1.2 A RMS on-state, 600 V peak off-state, 12 A non-repetitive surge, VTM ≤ 2.5 V at IF=10 mA. Internally tied to pin 8.
7	NC	unconnected	No internal connection. The functional diagram for the LTV-3223 does not assign a signal to pin 7 of the 8-pin DIP; leave floating or use for creepage/routing.
8	Output	passive	Main terminal of the output triac (MT1/MT2). Handles the AC load; rated 1.2 A RMS on-state, 600 V peak off-state. Internally tied to pin 6 for redundant PCB routing.

Key specifications

Parameter	Value
Manufacturer	Lite On
Package	DIP-8
Category	Optoisolators
Pins	8

Ordering variants

Same part, different packaging or reel option.

LTV-3223
LTV-3223M
LTV-3223S
LTV-3223S-TA
LTV-3223S-TA1

CAD (KiCad official)

Symbol: LTV-3223
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: Lite On datasheet (11 pp, sha256 d0c70e1b2093d3a0, 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