MS4553S

@@ -0,0 +1,48 @@+# MS4553S++**Hangzhou Ruimeng Tech** · Translators / Level Shifters · SOT-23-8++MS4553S from Hangzhou Ruimeng Tech, in a SOT-23-8. 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 | VCCB | power_in | B-side supply voltage, 2.3 V ≤ VCCB ≤ 5.5 V. Sets the reference rail for the B-side I/O (B1, B2). Must satisfy VCCA ≤ VCCB. |+| 2 | B1 | bidirectional | B-side bidirectional I/O channel 1, referenced to VCCB. Paired with A1 (pin 7) for level translation. Supports open-drain and push-pull operation. |+| 3 | B2 | bidirectional | B-side bidirectional I/O channel 2, referenced to VCCB. Paired with A2 (pin 6) for level translation. Supports open-drain and push-pull operation. |+| 4 | OE | input | Output enable, referenced to VCCA. Drive OE low to place all I/Os in Hi-Z; drive high (VIH ≥ VCCA×0.8) for normal translation. Should be tied to VCCA through a pull-up resistor to preserve Hi-Z during supply ramp. |+| 5 | GND | power_in | Ground reference for the device (0 V). |+| 6 | A2 | bidirectional | A-side bidirectional I/O channel 2, referenced to VCCA. Paired with B2 (pin 3) for level translation. Supports open-drain and push-pull operation. |+| 7 | A1 | bidirectional | A-side bidirectional I/O channel 1, referenced to VCCA. Paired with B1 (pin 2) for level translation. Supports open-drain and push-pull operation. |+| 8 | VCCA | power_in | A-side supply voltage, 1.65 V ≤ VCCA ≤ 5.5 V, with VCCA ≤ VCCB. Sets the reference rail for the A-side I/O (A1, A2) and the OE input threshold. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Hangzhou Ruimeng Tech |+| Package | SOT-23-8 |+| Category | Logic |+| Pins | 8 |++## Ordering variants++- `MS4553S`++## CAD (KiCad official)++- Symbol: `MS4553S`+- Footprint: `Package_TO_SOT_SMD:SOT-23-8`+- 3D model: SOT-23-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Hangzhou Ruimeng Tech datasheet](docs/ms4553s-datasheet.pdf) (16 pp, sha256 `fc4ff4ffb6f9dcff`, 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).++[Datasheet PDF](docs/ms4553s-datasheet.pdf)

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