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Generated by kicad-footprint-generator · KiCad file format 20260206

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xl74ls138-etched.step	xl74ls138: factory component page (tier=lcsc) · Ray	5d ago
xl74ls138-hero.glb	xl74ls138: hero GLB from the etched model (keeps the MPN mark) · Ray	5d ago
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XL74LS138

XINLUDA · Signal Switches, Multiplexers, Decoders · SOP-16

XL74LS138 from XINLUDA, in a SOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	A	input	Binary select input A (least significant), which with B and C selects one of eight active-low outputs.
2	B	input	Binary select input B, which with A and C selects one of eight active-low outputs.
3	C	input	Binary select input C (most significant), which with A and B selects one of eight active-low outputs.
4	G2A	input	Active-low enable input G2A; must be low (together with G2B low and G1 high) to enable the decoder.
5	G2B	input	Active-low enable input G2B; must be low (together with G2A low and G1 high) to enable the decoder.
6	G1	input	Active-high enable input G1; must be high (with G2A and G2B low) to enable the decoder.
7	Y7	output	Active-low decoded output 7, low only when the select code is 111 and the decoder is enabled.
8	GND	power_in	Ground, the network ground terminal for all voltage values.
9	Y6	output	Active-low decoded output 6, low only when the select code is 110 and the decoder is enabled.
10	Y5	output	Active-low decoded output 5, low only when the select code is 101 and the decoder is enabled.
11	Y4	output	Active-low decoded output 4, low only when the select code is 100 and the decoder is enabled.
12	Y3	output	Active-low decoded output 3, low only when the select code is 011 and the decoder is enabled.
13	Y2	output	Active-low decoded output 2, low only when the select code is 010 and the decoder is enabled.
14	Y1	output	Active-low decoded output 1, low only when the select code is 001 and the decoder is enabled.
15	Y0	output	Active-low decoded output 0, low only when the select code is 000 and the decoder is enabled.
16	VCC	power_in	Supply voltage, recommended 4.75 V to 5.25 V (5 V nominal).

Key specifications

Parameter	Value
Manufacturer	XINLUDA
Package	SOP-16
Category	Logic
Pins	16

CAD (KiCad official)

Symbol: XL74LS138
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOP-16 (KiCad packages3D, STEP)
3D model files: xl74ls138-etched.step / xl74ls138-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); xl74ls138.step / xl74ls138.glb are the bare package body.

Provenance

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

Datasheet: XINLUDA datasheet (6 pp, sha256 c52ed1bf406b835f, retrieved 2026-10-18, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF