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SSP3485U
Public Made by Adomby adom
Shanghai Siproin Microelectronics RS-485/RS-422 ICs, MSOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+48@@ -0,0 +1,48 @@+# SSP3485U++**Shanghai Siproin Microelectronics** · RS-485/RS-422 ICs · MSOP-8++SSP3485U from Shanghai Siproin Microelectronics, in a MSOP-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 | RO | output | Receiver output. Drives high when A-B >= -0.05V, low when A-B <= -0.2V, and high (fail-safe) when A and B are open or shorted. High-Z when the receiver is disabled (RE = H). |+| 2 | RE | input | Receiver output enable (active low). Receiver output RO is enabled when RE is low, and forced to high impedance when RE is high. Bar over 'RE' indicates active-low signalling. |+| 3 | DE | input | Driver output enable (active high). Bus drivers A and B are enabled when DE is high and forced to high impedance when DE is low. Pulling DE low together with RE high places the device in shutdown (ISHDN max 10 uA). |+| 4 | DI | input | Driver (transmit) data input. When DE is high, a low on DI forces A low and B high; a high on DI forces A high and B low. TTL/CMOS compatible (VIH >= 2.0V, VIL <= 0.8V). |+| 5 | GND | power_in | Device ground reference (0 V). All signal voltages are referenced to this pin. |+| 6 | A | bidirectional | Non-inverting RS-485/RS-422 differential bus line. Serves as receiver input and driver output. Withstands ±15kV HBM ESD and -13V to +13V common-mode range; 1/8 unit-load input (RIN >= 96 kOhm) permits up to 256 nodes on the bus. |+| 7 | B | bidirectional | Inverting RS-485/RS-422 differential bus line. Serves as receiver input and driver output. Withstands ±15kV HBM ESD and -13V to +13V common-mode range; 1/8 unit-load input (RIN >= 96 kOhm) permits up to 256 nodes on the bus. |+| 8 | VDD | power_in | +5 V supply input (operating range 4.75-5.25 V; abs max -0.3 to +7 V). Bypass with a 0.1 uF ceramic capacitor to GND close to the pin. Typical ICC 450 uA (max 1.1 mA); shutdown current 10 uA max. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Shanghai Siproin Microelectronics |+| Package | MSOP-8 |+| Category | Comm/UART |+| Pins | 8 |++## Ordering variants++- `SSP3485UU`+- `SSP3485U`++## CAD (KiCad official)++- Symbol: `SSP3485U`+- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`+- 3D model: MSOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Shanghai Siproin Microelectronics datasheet](docs/ssp3485u-datasheet.pdf) (11 pp, sha256 `746800f4846f9992`, 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/ssp3485u-datasheet.pdf)
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