component
LM1881MX
Public Made by Adomby adom
Texas Instruments Video Interface ICs, SOIC-8. Datasheet-verified pinout, 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
markdownLM1881MX
Texas Instruments · Video Interface ICs · SOIC-8
LM1881MX from Texas Instruments, in a SOIC-8. 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 | CSOUT | output | Composite sync output. Reproduces the sync tips stripped from the composite video input; logic-level output with logic-0 sink of 1.6 mA (VOL ≤ 0.8 V) and typical logic-1 swing of 3.6 V (VCC=5 V) or 10 V (VCC=12 V). |
| 2 | CVIN | input | Composite video input. AC-coupled through 0.1 µF; internally clamped to 1.5 V DC nominal with an input impedance >10 kΩ. Accepts 0.5-2 V p-p standard sync video. |
| 3 | VSOUT | output | Vertical sync output. Positive-going pulse (nominally 230 µs wide for NTSC) generated on the rising edge of the first serration of the vertical sync interval. Logic-0 sink 1.6 mA (VOL ≤ 0.8 V). |
| 4 | GND | power_in | Ground reference for the device. |
| 5 | BPOUT | output | Burst gate / back-porch timing output. Positive pulse (typ. 4 µs wide with 2.7 kΩ pull-up) coincident with the color burst / back porch of each horizontal line. Logic-0 sink 1.6 mA (VOL ≤ 0.8 V). |
| 6 | RSET | input | Charge-current external resistor pin. External RSET (typ. 680 kΩ to GND) sets internal integrator/oscillator current and thus vertical sync/burst timing. Internal reference ≈ 1.22 V. Keep low-capacitance layout to avoid coupling from output pins. |
| 7 | OEOUT | output | Odd/even field index output. Identifies which field of an interlaced video source is currently at the input; toggles once per field. Logic-0 sink 1.6 mA (VOL ≤ 0.8 V); max output sink current 2 mA. |
| 8 | VCC | power_in | Positive supply voltage input, 5 V to 12 V DC (absolute max 13.2 V). Supply current typ. 5.2 mA at 5 V, 5.5 mA at 12 V; decouple with 0.1 µF to GND. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Interface |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
LM1881MXMLM1881MXLM1881MXN
CAD (KiCad official)
- Symbol:
LM1881MX - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
lm1881mx-etched.step/lm1881mx-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm1881mx.step/lm1881mx.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (24 pp, sha256
125197c8d4aec5b5, retrieved 2026-08-17, tier: lcsc) - 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).