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SN74LS393DR
Public Made by Adomby adom
Texas Instruments Counters, Dividers, SOIC-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSN74LS393DR
Texas Instruments · Counters, Dividers · SOIC-14
SN74LS393DR from Texas Instruments, in a SOIC-14. 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 | 1A | input | Clock input of counter 1, advancing the count on the falling edge (logic symbol pin 1). |
| 2 | 1CLR | input | Direct clear input of counter 1, which resets its four outputs to low. |
| 3 | 1QA | output | Counter 1 output QA, the least-significant bit of the binary count. |
| 4 | 1QB | output | Counter 1 output QB of the 4-bit binary count. |
| 5 | 1QC | output | Counter 1 output QC of the 4-bit binary count. |
| 6 | 1QD | output | Counter 1 output QD, the most-significant bit of the binary count. |
| 7 | GND | power_in | Ground. |
| 8 | 2QD | output | Counter 2 output QD, the most-significant bit of the binary count. |
| 9 | 2QC | output | Counter 2 output QC of the 4-bit binary count. |
| 10 | 2QB | output | Counter 2 output QB of the 4-bit binary count. |
| 11 | 2QA | output | Counter 2 output QA, the least-significant bit of the binary count. |
| 12 | 2CLR | input | Direct clear input of counter 2, which resets its four outputs to low. |
| 13 | 2A | input | Clock input of counter 2, advancing the count on the falling edge. |
| 14 | VCC | power_in | Positive supply voltage. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-14 |
| Category | Logic |
| Pins | 14 |
CAD (KiCad official)
- Symbol:
SN74LS393DR - Footprint:
Package_SO:SOIC-14_3.9x8.7mm_P1.27mm - 3D model: SOIC-14 (KiCad packages3D, STEP)
- 3D model files:
sn74ls393dr-etched.step/sn74ls393dr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74ls393dr.step/sn74ls393dr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (37 pp, sha256
01ffbca0db1f34ba, retrieved 2026-10-05, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).