# SN74LS247DR

**Texas Instruments** · Digital Tube Drivers · SOP-16

SN74LS247DR from Texas Instruments, in a SOP-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 | B | input | BCD input B, one of four inputs (A, B, C, D) that select the displayed digit. |
| 2 | C | input | BCD input C, one of four inputs (A, B, C, D) that select the displayed digit. |
| 3 | LT | input | Active-low lamp test input; when BI/RBO is open or high, a low on LT turns all segment outputs on. |
| 4 | BI/RBO | bidirectional | Wire-AND blanking input (BI) and ripple-blanking output (RBO); a low on BI forces all segment outputs off, and RBO goes low when ripple blanking of a zero occurs. |
| 5 | RBI | input | Active-low ripple-blanking input; must be open or high if blanking of a decimal zero is not desired. |
| 6 | D | input | BCD input D, one of four inputs (A, B, C, D) that select the displayed digit. |
| 7 | A | input | BCD input A, one of four inputs (A, B, C, D) that select the displayed digit. |
| 8 | GND | power_in | Ground. |
| 9 | e | output | Segment e active-low open-collector output, sinks 24 mA with 15 V maximum for the SN74LS247. |
| 10 | d | output | Segment d active-low open-collector output, sinks 24 mA with 15 V maximum for the SN74LS247. |
| 11 | c | output | Segment c active-low open-collector output, sinks 24 mA with 15 V maximum for the SN74LS247. |
| 12 | b | output | Segment b active-low open-collector output, sinks 24 mA with 15 V maximum for the SN74LS247. |
| 13 | a | output | Segment a active-low open-collector output, sinks 24 mA with 15 V maximum for the SN74LS247. |
| 14 | g | output | Segment g active-low open-collector output, sinks 24 mA with 15 V maximum for the SN74LS247. |
| 15 | f | output | Segment f active-low open-collector output, sinks 24 mA with 15 V maximum for the SN74LS247. |
| 16 | VCC | power_in | Positive supply voltage. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOP-16 |
| Category | LED Drivers |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `SN74LS247DR`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOP-16 (KiCad packages3D, STEP)
- 3D model files: `sn74ls247dr-etched.step` / `sn74ls247dr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74ls247dr.step` / `sn74ls247dr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/sn74ls247.pdf) (20 pp, sha256 `fb021c0f3703abf0`, retrieved 2026-10-11, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (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](docs/sn74ls247dr-datasheet.pdf)