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SN74LS390NSR

Public Made by Adom

by adom

Texas Instruments Counters / Dividers, SOIC-16-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SN74LS390NSR

Texas Instruments · Counters / Dividers · SOIC-16-208mil

SN74LS390NSR from Texas Instruments, in a SOIC-16-208mil. 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 1CKA input Clock input A of counter 1 (the divide-by-2 section), which drives output 1QA.
2 1CLR input Direct clear input of counter 1, which resets the counter outputs when it is high.
3 1QA output Output QA of counter 1, the divide-by-2 flip-flop output.
4 1CKB input Clock input B of counter 1 (the divide-by-5 section).
5 1QB output Output QB of counter 1.
6 1QC output Output QC of counter 1.
7 1QD output Output QD of counter 1.
8 GND power_in Ground pin.
9 2QD output Output QD of counter 2.
10 2QC output Output QC of counter 2.
11 2QB output Output QB of counter 2.
12 2CKB input Clock input B of counter 2 (the divide-by-5 section).
13 2QA output Output QA of counter 2, the divide-by-2 flip-flop output.
14 2CLR input Direct clear input of counter 2, which resets the counter outputs when it is high.
15 2CKA input Clock input A of counter 2 (the divide-by-2 section), which drives output 2QA.
16 VCC power_in Positive supply voltage pin.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-16-208mil
Category Logic ICs
Pins 16

CAD (KiCad official)

  • Symbol: SN74LS390NSR
  • Footprint: Adom_Gen:Texas_Instruments_SN74
  • 3D model: SOIC-16-208mil (KiCad packages3D, STEP)
  • 3D model files: sn74ls390nsr-etched.step / sn74ls390nsr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74ls390nsr.step / sn74ls390nsr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (37 pp, sha256 01ffbca0db1f34ba, retrieved 2026-10-29, tier: manufacturer)
  • 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