ds3487m

@@ -0,0 +1,57 @@+# DS3487M++**HGSEMI** · RS-485 / RS-422 ICs · SOP-16++DS3487M from HGSEMI, in a SOP-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 logic input for driver A. PNP-buffered to minimize input loading; VIL max 0.8 V, VIH min 2.0 V, IIL max -200 µA at 0.5 V. |+| 2 | OUTPUT_A | tri_state | Non-inverting differential output of driver A (one half of RS-422 output pair A). Follows INPUT_A when A/B CONTROL is high; forced to high-Z when A/B CONTROL is low. VOH >= 2.5 V @ IOH = -20 mA, VOL <= 0.5 V @ IOL = 48 mA. |+| 3 | /OUTPUT_A | tri_state | Inverting differential output of driver A (complementary half of RS-422 output pair A). Opposite polarity to pin 2; forced to high-Z when A/B CONTROL is low. Differential output voltage VT >= 2.0 V. |+| 4 | A/B_CONTROL | input | Shared active-high output-enable for drivers A and B. High enables both A and B differential outputs; low places both A and B outputs into TRI-STATE (high impedance). TTL-compatible input. |+| 5 | OUTPUT_B | tri_state | Non-inverting differential output of driver B. Follows INPUT_B when A/B CONTROL is high; forced to high-Z when A/B CONTROL is low. |+| 6 | /OUTPUT_B | tri_state | Inverting differential output of driver B. Opposite polarity to pin 5; forced to high-Z when A/B CONTROL is low. |+| 7 | INPUT_B | input | TTL-compatible logic input for driver B. PNP-buffered; VIL max 0.8 V, VIH min 2.0 V. |+| 8 | GND | power_in | Ground reference (0 V) for the device. All voltages are referenced to this pin. |+| 9 | INPUT_C | input | TTL-compatible logic input for driver C. PNP-buffered; VIL max 0.8 V, VIH min 2.0 V. |+| 10 | OUTPUT_C | tri_state | Non-inverting differential output of driver C. Follows INPUT_C when C/D CONTROL is high; forced to high-Z when C/D CONTROL is low. VOH >= 2.5 V @ IOH = -20 mA, VOL <= 0.5 V @ IOL = 48 mA. |+| 11 | /OUTPUT_C | tri_state | Inverting differential output of driver C. Opposite polarity to pin 10; forced to high-Z when C/D CONTROL is low. |+| 12 | C/D_CONTROL | input | Shared active-high output-enable for drivers C and D. High enables both C and D differential outputs; low places both C and D outputs into TRI-STATE (high impedance). TTL-compatible input. |+| 13 | /OUTPUT_D | tri_state | Inverting differential output of driver D. Opposite polarity to pin 14; forced to high-Z when C/D CONTROL is low. |+| 14 | OUTPUT_D | tri_state | Non-inverting differential output of driver D. Follows INPUT_D when C/D CONTROL is high; forced to high-Z when C/D CONTROL is low. |+| 15 | INPUT_D | input | TTL-compatible logic input for driver D. PNP-buffered; VIL max 0.8 V, VIH min 2.0 V. |+| 16 | VCC | power_in | Positive 5 V supply pin. Operating range 4.75 V to 5.25 V; absolute max 8 V. Active supply current typically 50 mA (80 mA max); 35 mA typical in TRI-STATE. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | HGSEMI |+| Package | SOP-16 |+| Category | Interface |+| Pins | 16 |++## Ordering variants++- `DS3487MM/TR`+- `DS3487MN`+- `DS3487MMT/TR`++## CAD (KiCad official)++- Symbol: `DS3487M`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SOP-16 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [HGSEMI datasheet](docs/ds3487m-datasheet.pdf) (None pp, sha256 `1926ce34a1de6569`, 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/ds3487m-datasheet.pdf)

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