TXS0108E

@@ -0,0 +1,63 @@+# TXS0108E++**Texas Instruments** · Bidirectional level translator · TSSOP-20++8-bit non-inverting bidirectional voltage-level translator with automatic direction sensing, in a TSSOP-20 package. It shifts eight signals between any two of the 1.5, 1.8, 2.5, 3.3, and 5 V rails (VCCA 1.4-3.6 V, VCCB 1.65-5.5 V), with no direction pin, so it Just Works on I2C, SPI, and GPIO between a 3.3 V MCU and 5 V peripherals. An OE pin puts all I/Os in high-Z. The default bus level shifter.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | A1 | bidirectional | A-port channel 1 I/O, referenced to VCCA. Auto-sensing bidirectional level-shifted data line paired with B1. Requires an external pull-up at each end for open-drain operation; drives push-pull otherwise. |+| 2 | VCCA | power_in | A-port supply rail. 1.4V ≤ VCCA ≤ 3.6V and VCCA ≤ VCCB. Sets the logic level for the A-side channels and OE input. Bypass locally with 0.1µF. |+| 3 | A2 | bidirectional | A-port channel 2 I/O, referenced to VCCA. Paired with B2 for auto-sensing bidirectional level shifting. |+| 4 | A3 | bidirectional | A-port channel 3 I/O, referenced to VCCA. Paired with B3. |+| 5 | A4 | bidirectional | A-port channel 4 I/O, referenced to VCCA. Paired with B4. |+| 6 | A5 | bidirectional | A-port channel 5 I/O, referenced to VCCA. Paired with B5. |+| 7 | A6 | bidirectional | A-port channel 6 I/O, referenced to VCCA. Paired with B6. |+| 8 | A7 | bidirectional | A-port channel 7 I/O, referenced to VCCA. Paired with B7. |+| 9 | A8 | bidirectional | A-port channel 8 I/O, referenced to VCCA. Paired with B8. |+| 10 | OE | input | Output-enable. Referenced to VCCA. Drive high to enable translation on all 8 channels; drive low to place every A and B channel in the high-impedance (Hi-Z) state. Tie to GND through a pull-down during power-up/down to keep the device in Hi-Z (VIH ≥ 0.65·VCCA, VIL ≤ 0.35·VCCA). |+| 11 | GND | power_in | Device ground. Connect to the system ground reference. |+| 12 | B8 | bidirectional | B-port channel 8 I/O, referenced to VCCB. Paired with A8. |+| 13 | B7 | bidirectional | B-port channel 7 I/O, referenced to VCCB. Paired with A7. |+| 14 | B6 | bidirectional | B-port channel 6 I/O, referenced to VCCB. Paired with A6. |+| 15 | B5 | bidirectional | B-port channel 5 I/O, referenced to VCCB. Paired with A5. |+| 16 | B4 | bidirectional | B-port channel 4 I/O, referenced to VCCB. Paired with A4. |+| 17 | B3 | bidirectional | B-port channel 3 I/O, referenced to VCCB. Paired with A3. |+| 18 | B2 | bidirectional | B-port channel 2 I/O, referenced to VCCB. Paired with A2. |+| 19 | VCCB | power_in | B-port supply rail. 1.65V ≤ VCCB ≤ 5.5V and must be ≥ VCCA. Sets the logic level for the B-side channels. Bypass locally with 0.1µF. |+| 20 | B1 | bidirectional | B-port channel 1 I/O, referenced to VCCB. Paired with A1. |++## Key specifications++| Parameter | Value |+|---|---|+| Type | 8-bit bidirectional level translator |+| Direction | Automatic sensing (no DIR pin) |+| A-side supply (VCCA) | 1.4-3.6 V |+| B-side supply (VCCB) | 1.65-5.5 V |+| Channels | 8 |+| Output enable | OE pin (Hi-Z) |+| Package | TSSOP-20 |+| Body (L×W×H) | 6.5 × 4.4 × 1.2 mm |++## Ordering variants++- `TXS0108EPWR (TSSOP-20, tape & reel)`++## CAD (KiCad official)++- Symbol: `Logic_LevelTranslator:TXS0108EPW`+- Footprint: `Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm`+- 3D model: TSSOP-20 (KiCad packages3D)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/txs0108e.pdf) (45 pp, sha256 `f41f9f58874399bb`, retrieved 2026-08-17, tier: manufacturer)+- **Extractor:** `ds2sf` (Claude) — every pin and dimension is cited to a datasheet page; refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/txs0108e-datasheet.pdf)

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