# ISOSD61L

**STMicroelectronics** · Isolated ADCs · SOIC-16-300mil

ISOSD61L from STMicroelectronics, in a SOIC-16-300mil. 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 | VDDISO | power_in | High-voltage-side supply; recommended range is 4.5 V to 5.5 V (absolute maximum -0.3 V to 6 V). |
| 2 | VIN+ | power_in | Positive analog input of the sigma-delta modulator; full-scale differential range is ±320 mV, recommended input voltage is -200 mV to 200 mV. |
| 3 | VIN- | power_in | Negative analog input of the sigma-delta modulator; forms a differential pair with VIN+ over the ±320 mV full-scale range. |
| 4 | GNDISO | power_in | Ground for the high-voltage (isolated) side of the device. |
| 5 | NC | unconnected | Test-purpose pin (Table 1 note 1); it must be connected to GND in functional mode. |
| 6 | NC | unconnected | Test-purpose pin (Table 1 note 1); it must be connected to GND in functional mode. |
| 7 | VDDISO | power_in | High-voltage-side supply; recommended range is 4.5 V to 5.5 V (absolute maximum -0.3 V to 6 V). |
| 8 | GNDISO | power_in | Ground for the high-voltage (isolated) side of the device. |
| 9 | GND | power_in | Ground for the low-voltage (digital) side of the device. |
| 10 | MDAT- | output | Negative LVDS serial data output of the 1-bit modulator bitstream (ISOSD61L only; NC on the single-ended ISOSD61). |
| 11 | MDAT+ | output | Positive LVDS serial data output of the 1-bit modulator bitstream, provided two clock cycles after the effective sampling instant with a data delay of 5 to 20 ns after the clock edge. |
| 12 | MCLKIN- | input | Negative LVDS modulator clock input; clock frequency 5 to 25 MHz with 48% to 52% duty cycle (ISOSD61L only; NC on the single-ended ISOSD61). |
| 13 | MCLKIN+ | input | Positive LVDS modulator clock input; clock frequency 5 to 25 MHz with 48% to 52% duty cycle. |
| 14 | VDD | power_in | Low-voltage (digital) side supply; recommended range is 3 V to 5.5 V. |
| 15 | NC | unconnected | Not connected; no function is stated in the datasheet. |
| 16 | GND | power_in | Ground for the low-voltage (digital) side of the device. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOIC-16-300mil |
| Category | Signal Isolation Devices |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `ISOSD61L`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOIC-16-300mil (KiCad packages3D, STEP)
- 3D model files: `isosd61l-etched.step` / `isosd61l-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `isosd61l.step` / `isosd61l.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603050776914632705) (23 pp, sha256 `e6ef0e8105c57581`, retrieved 2026-10-08, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/isosd61l-datasheet.pdf)