component
gm3490e
Public Unreviewedby Ray
GATEMODE RS-485/RS-422 ICs, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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README
markdownGM3490E
GATEMODE · RS-485/RS-422 ICs · SOP-8
GM3490E from GATEMODE, in a SOP-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 | VCC | power_in | Positive supply input. Recommended operating range 3.0V ≤ VCC ≤ 3.6V; absolute maximum 6.0V. Decouple to GND with a local bypass capacitor. |
| 2 | RO | output | Receiver output (CMOS). RO is driven high when the differential input (A−B) ≥ −50mV, and low when (A−B) ≤ −200mV. Fail-safe forces RO high when inputs are open or shorted. VOH ≥ VCC−0.4V at IO=−4mA; VOL ≤ 0.4V at IO=4mA. |
| 3 | DI | input | Driver input (CMOS). A logic low on DI forces Y low and Z high; a logic high on DI forces Y high and Z low. VIH ≥ 2.0V, VIL ≤ 0.8V, with ~100mV of input hysteresis. |
| 4 | GND | power_in | Ground reference for the device. Connect to system ground. |
| 5 | Y | output | Driver non-inverting (true) output to the RS-485/RS-422 bus. Guaranteed |
| 6 | Z | output | Driver inverting (complementary) output to the RS-485/RS-422 bus. Paired with Y as the differential transmit line. Absolute maximum voltage range −8V to +13V; short-circuit current ≥ ±250mA. |
| 7 | B | input | Receiver inverting (complementary) input from the RS-485/RS-422 bus. High input impedance (RIN ≥ 12kΩ, typ 48kΩ, 1/4 unit load) allows up to 128 transceivers on the bus. Absolute maximum voltage −8V to +13V; ±15kV HBM ESD protected. |
| 8 | A | input | Receiver non-inverting (true) input from the RS-485/RS-422 bus. High input impedance (RIN ≥ 12kΩ, typ 48kΩ, 1/4 unit load). Receiver thresholds: RO=1 when A−B ≥ −50mV, RO=0 when A−B ≤ −200mV. Absolute maximum voltage −8V to +13V; ±15kV HBM ESD protected. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | GATEMODE |
| Package | SOP-8 |
| Category | Comm/UART |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
GM3490E - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: GATEMODE datasheet (None pp, sha256
35c78446794a7f44, retrieved 2026-08-17, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- 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).