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SN74LS151DR

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by Ray

Texas Instruments Signal Switches, Multiplexers, Decoders, SOP-16. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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SN74LS151DR

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

SN74LS151DR from Texas Instruments, in a SOP-16. 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 D3 input Data input 3. Selected to the Y output (and inverted to W) when C,B,A = L,H,H and strobe G is low. TTL/LS input, typ Req = 17 kΩ to VCC.
2 D2 input Data input 2. Selected to the Y output (and inverted to W) when C,B,A = L,H,L and strobe G is low.
3 D1 input Data input 1. Selected to the Y output (and inverted to W) when C,B,A = L,L,H and strobe G is low.
4 D0 input Data input 0. Selected to the Y output (and inverted to W) when C,B,A = L,L,L and strobe G is low.
5 Y output Non-inverting data output. Presents the level of the selected D input when strobe G is low; forced low when G is high. IOH = -400 µA, IOL = 8 mA (74LS).
6 W output Inverting data output (complement of Y). Presents the inverse of the selected D input when strobe G is low; forced high when G is high.
7 ~{G} input Active-low strobe / enable input. When G is low the multiplexer is enabled and Y follows the selected D input; when G is high, Y is forced low and W is forced high regardless of the select inputs.
8 GND power_in Ground reference (0 V) for the device.
9 C input Binary select input C (MSB of the 3-bit select bus). Together with B and A chooses which of D0-D7 is routed to Y and W.
10 B input Binary select input B (mid bit of the 3-bit select bus).
11 A input Binary select input A (LSB of the 3-bit select bus).
12 D7 input Data input 7. Selected when C,B,A = H,H,H and strobe G is low.
13 D6 input Data input 6. Selected when C,B,A = H,H,L and strobe G is low.
14 D5 input Data input 5. Selected when C,B,A = H,L,H and strobe G is low.
15 D4 input Data input 4. Selected when C,B,A = H,L,L and strobe G is low.
16 VCC power_in Positive supply. Recommended VCC = 4.75 V to 5.25 V (5 V nominal) for the 74LS variant. Typical ICC = 6 mA.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • SN74LS151DR
  • SN74LS151DRD
  • SN74LS151DRN
  • SN74LS151DRJ
  • SN74LS151DRFK

CAD (KiCad official)

  • Symbol: SN74LS151DR
  • Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
  • 3D model: SOP-16 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Texas Instruments datasheet (22 pp, sha256 4bba821ffccfa360, retrieved 2026-08-17, tier: manufacturer)
  • 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