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SN74F258D

Texas Instruments · Signal Switches, Multiplexers, Decoders · SOIC-16

SN74F258D from Texas Instruments, in a SOIC-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/B	input	Common select input that chooses the A data inputs when low and the B data inputs when high, per the function table.
2	1A	input	Channel 1 data input A, passed to 1Y when A/B is low and OE is low.
3	1B	input	Channel 1 data input B, passed to 1Y when A/B is high and OE is low.
4	1Y	tri_state	Channel 1 3-state output that goes to high impedance when OE is high; SN74F258 rated for IOL up to 24 mA and IOH of -3 mA.
5	2A	input	Channel 2 data input A, passed to 2Y when A/B is low and OE is low.
6	2B	input	Channel 2 data input B, passed to 2Y when A/B is high and OE is low.
7	2Y	tri_state	Channel 2 3-state output that goes to high impedance when OE is high; SN74F258 rated for IOL up to 24 mA and IOH of -3 mA.
8	GND	power_in	Ground reference for the device.
9	3Y	tri_state	Channel 3 3-state output that goes to high impedance when OE is high; SN74F258 rated for IOL up to 24 mA and IOH of -3 mA.
10	3B	input	Channel 3 data input B, passed to 3Y when A/B is high and OE is low.
11	3A	input	Channel 3 data input A, passed to 3Y when A/B is low and OE is low.
12	4Y	tri_state	Channel 4 3-state output that goes to high impedance when OE is high; SN74F258 rated for IOL up to 24 mA and IOH of -3 mA.
13	4B	input	Channel 4 data input B, passed to 4Y when A/B is high and OE is low.
14	4A	input	Channel 4 data input A, passed to 4Y when A/B is low and OE is low.
15	OE	input	Active-low output enable; a high level puts all Y outputs in the high-impedance state.
16	VCC	power_in	Supply voltage, 4.5 V minimum to 5.5 V maximum (5 V nominal) per recommended operating conditions.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-16
Category	Logic
Pins	16

CAD (KiCad official)

Symbol: SN74F258D
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOIC-16 (KiCad packages3D, STEP)
3D model files: sn74f258d-etched.step / sn74f258d-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74f258d.step / sn74f258d.glb are the bare package body.

Provenance

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

Datasheet: Texas Instruments datasheet (9 pp, sha256 b17fc8383fc9ef3e, retrieved 2026-10-07, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-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