SN74HCT245PWR

@@ -0,0 +1,72 @@+# SN74HCT245PWR++**Texas Instruments** · Buffer/Driver/Transceiver · TSSOP-20++SN74HCT245PWR from Texas Instruments, in a TSSOP-20. 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 | DIR | input | Direction select input. High = A to B, Low = B to A. TTL-compatible input (VIH ≥ 2 V, VIL ≤ 0.8 V). |+| 2 | A1 | bidirectional | Channel 1 port A. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high. ±6 mA drive at 5 V. |+| 3 | A2 | bidirectional | Channel 2 port A. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high. |+| 4 | A3 | bidirectional | Channel 3 port A. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high. |+| 5 | A4 | bidirectional | Channel 4 port A. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high. |+| 6 | A5 | bidirectional | Channel 5 port A. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high. |+| 7 | A6 | bidirectional | Channel 6 port A. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high. |+| 8 | A7 | bidirectional | Channel 7 port A. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high. |+| 9 | A8 | bidirectional | Channel 8 port A. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high. |+| 10 | GND | power_in | Ground reference (0 V). Center-pin placement helps minimize high-speed switching noise. |+| 11 | B8 | bidirectional | Channel 8 port B. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high. |+| 12 | B7 | bidirectional | Channel 7 port B. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high. |+| 13 | B6 | bidirectional | Channel 6 port B. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high. |+| 14 | B5 | bidirectional | Channel 5 port B. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high. |+| 15 | B4 | bidirectional | Channel 4 port B. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high. |+| 16 | B3 | bidirectional | Channel 3 port B. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high. |+| 17 | B2 | bidirectional | Channel 2 port B. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high. |+| 18 | B1 | bidirectional | Channel 1 port B. Bidirectional bus I/O; direction set by DIR, tri-state when OE is high. |+| 19 | OE | input | Output enable, active low. High = all ports in high-impedance (isolation) mode; Low = all ports active. TTL-compatible input. |+| 20 | VCC | power_in | Positive supply voltage. Recommended 4.5 V to 5.5 V (nominal 5 V). Absolute max 7 V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | TSSOP-20 |+| Category | Logic |+| Pins | 20 |++## Ordering variants++- `SN74HCT245PWR`+- `SN74HCT245PWRDW`+- `SN74HCT245PWRDWR`+- `SN74HCT245PWRN`+- `SN74HCT245PWRNE`+- `SN74HCT245PWRNS`+- `SN74HCT245PWRNSR`+- `SN74HCT245PWRDB`+- `SN74HCT245PWRDBR`+- `SN74HCT245PWRDGS`+- `SN74HCT245PWRDGSR`+- `SN74HCT245PWRJ`+- `SN74HCT245PWRW`+- `SN74HCT245PWRFK`++## CAD (KiCad official)++- Symbol: `SN74HCT245PWR`+- Footprint: `Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm`+- 3D model: TSSOP-20 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/sn74hct245.pdf) (38 pp, sha256 `17db29398bd94ccf`, retrieved 2026-08-17, tier: manufacturer)+- **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/sn74hct245pwr-datasheet.pdf)

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