component
SN74LS90N
Public Made by Adomby adom
Texas Instruments Counters, Dividers, DIP-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads on click. Unloads only if this page sits in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads only if this page sits in the background.
PCB Footprint
Open full view ↗Loads on click. Unloads only if this page sits in the background.
Datasheet
Open in new tab ↗Loads on click. Unloads only if this page sits in the background.
README
markdownSN74LS90N
Texas Instruments · Counters, Dividers · DIP-14
SN74LS90N from Texas Instruments, in a DIP-14. 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 | CKB | input | Input B clock; count pulse input to the divide-by-five (BCD) counter section, active on the high-to-low transition. |
| 2 | R0(1) | input | Gated master reset input; when both R0(1) and R0(2) are high (with R9(1) or R9(2) low), all outputs (QA-QD) are reset to logic 0. |
| 3 | R0(2) | input | Gated master reset input; when both R0(1) and R0(2) are high (with R9(1) or R9(2) low), all outputs (QA-QD) are reset to logic 0. |
| 4 | NC | unconnected | No internal connection. |
| 5 | VCC | power_in | Positive supply voltage for the device. |
| 6 | R9(1) | input | Gated set-to-nine input; when both R9(1) and R9(2) are high, the outputs are set to the BCD count of nine (QA=QD=1, QB=QC=0). |
| 7 | R9(2) | input | Gated set-to-nine input; when both R9(1) and R9(2) are high, the outputs are set to the BCD count of nine (QA=QD=1, QB=QC=0). |
| 8 | QC | output | Counter output QC of the divide-by-five section. |
| 9 | QB | output | Counter output QB of the divide-by-five section. |
| 10 | GND | power_in | Ground reference for the device. |
| 11 | QD | output | Counter output QD of the divide-by-five section; can be connected to CKA to obtain a symmetrical divide-by-ten count. |
| 12 | QA | output | Counter output QA of the divide-by-two section; when CKB is connected to QA, the device operates as a BCD decade counter. |
| 13 | NC | unconnected | No internal connection. |
| 14 | CKA | input | Input A clock; count pulse input to the divide-by-two counter section, active on the high-to-low transition. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | DIP-14 |
| Category | Logic |
| Pins | 14 |
CAD (KiCad official)
- Symbol:
SN74LS90N - Footprint:
Package_DIP:DIP-14_W7.62mm - 3D model: DIP-14 (KiCad packages3D, STEP)
- 3D model files:
sn74ls90n-etched.step/sn74ls90n-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74ls90n.step/sn74ls90n.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (27 pp, sha256
43d2e13b0f0e6ce2, retrieved 2026-09-23, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-sonnet-5(text+vision), consensusclaude-opus-4-8(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).