# DS3487N

**HGSEMI** · RS-485 / RS-422 ICs · DIP-16

DS3487N from HGSEMI, in a DIP-16. 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 | INPUT_A | input | TTL-compatible data input for driver channel A. Drives non-inverting output high and inverting output low when logic high (VIH >= 2.0V); PNP-buffered to minimize input loading. |
| 2 | OUTPUT_A_NI | tri_state | Non-inverting differential line-driver output for channel A. Drives VOH >= 2.5V at IOH = -20 mA or VOL <= 0.5V at IOL = 48 mA; enters high impedance when A/B control (pin 4) is low. |
| 3 | OUTPUT_A_INV | tri_state | Inverting differential line-driver output for channel A. Complement of pin 2; enters TRI-STATE when A/B control (pin 4) is low. Meets EIA RS-422 differential output voltage VT >= 2.0V. |
| 4 | A/B_CONTROL | input | Active-high output enable shared by drivers A and B. When high, both A and B differential outputs are enabled; when low, both A and B outputs are forced to TRI-STATE (high impedance). |
| 5 | OUTPUT_B_INV | tri_state | Inverting differential line-driver output for channel B. Complement of pin 6; enters TRI-STATE when A/B control (pin 4) is low. |
| 6 | OUTPUT_B_NI | tri_state | Non-inverting differential line-driver output for channel B. Drives VOH >= 2.5V at IOH = -20 mA or VOL <= 0.5V at IOL = 48 mA; enters TRI-STATE when A/B control (pin 4) is low. |
| 7 | INPUT_B | input | TTL-compatible data input for driver channel B. VIL <= 0.8V, VIH >= 2.0V; PNP-buffered so IIL is typically only a small microamp-level load. |
| 8 | GND | power_in | Device ground (0V) reference for all inputs, outputs, and the internal logic. |
| 9 | INPUT_C | input | TTL-compatible data input for driver channel C. VIL <= 0.8V, VIH >= 2.0V; PNP-buffered input to minimize source loading. |
| 10 | OUTPUT_C_NI | tri_state | Non-inverting differential line-driver output for channel C. Drives VOH >= 2.5V at IOH = -20 mA or VOL <= 0.5V at IOL = 48 mA; enters TRI-STATE when C/D control (pin 12) is low. |
| 11 | OUTPUT_C_INV | tri_state | Inverting differential line-driver output for channel C. Complement of pin 10; enters TRI-STATE when C/D control (pin 12) is low. |
| 12 | C/D_CONTROL | input | Active-high output enable shared by drivers C and D. When high, both C and D differential outputs are enabled; when low, both C and D outputs are forced to TRI-STATE (high impedance). |
| 13 | OUTPUT_D_INV | tri_state | Inverting differential line-driver output for channel D. Complement of pin 14; enters TRI-STATE when C/D control (pin 12) is low. |
| 14 | OUTPUT_D_NI | tri_state | Non-inverting differential line-driver output for channel D. Drives VOH >= 2.5V at IOH = -20 mA or VOL <= 0.5V at IOL = 48 mA; enters TRI-STATE when C/D control (pin 12) is low. |
| 15 | INPUT_D | input | TTL-compatible data input for driver channel D. VIL <= 0.8V, VIH >= 2.0V; PNP-buffered input to minimize source loading. |
| 16 | VCC | power_in | Positive supply rail, 4.75 V to 5.25 V (nominal 5 V). Typical ICC = 50 mA active, 35 mA in TRI-STATE; bypass locally to GND (pin 8) with a 0.1 uF ceramic capacitor. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | DIP-16 |
| Category | Interface |
| Pins | 16 |

## Ordering variants

Same part, different packaging or reel option.

- `DS3487NN`
- `DS3487NM/TR`
- `DS3487NMT/TR`

## CAD (KiCad official)

- Symbol: `DS3487N`
- Footprint: `Package_DIP:DIP-16_W7.62mm`
- 3D model: DIP-16 (KiCad packages3D, STEP)
- 3D model files: `ds3487n-etched.step` / `ds3487n-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ds3487n.step` / `ds3487n.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HGSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603058176522526720) (None pp, sha256 `34ce555d2e59d400`, 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).

[Datasheet PDF](docs/ds3487n-datasheet.pdf)