SN74LV244APWR

@@ -0,0 +1,74 @@+# SN74LV244APWR++**Texas Instruments** · Buffer/Driver/Transceiver · TSSOP-20++SN74LV244APWR 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 | 1OE | input | Active-low output-enable for buffer group 1 (1Y1-1Y4). When low, the 1Y outputs are enabled; when high, the 1Y outputs are placed in the high-impedance (3-state) mode. |+| 2 | 1A1 | input | Buffer group 1 data input channel 1. Standard CMOS input; drives corresponding 1Y1 output when 1OE is low. |+| 3 | 2Y4 | tri_state | Buffer group 2 output channel 4. 3-state output driven from 2A4 when 2OE is low; high-impedance when 2OE is high. Drive capability up to 16 mA at VCC = 4.5 V. |+| 4 | 1A2 | input | Buffer group 1 data input channel 2. Standard CMOS input; drives corresponding 1Y2 output when 1OE is low. |+| 5 | 2Y3 | tri_state | Buffer group 2 output channel 3. 3-state output driven from 2A3 when 2OE is low; high-impedance when 2OE is high. |+| 6 | 1A3 | input | Buffer group 1 data input channel 3. Standard CMOS input; drives corresponding 1Y3 output when 1OE is low. |+| 7 | 2Y2 | tri_state | Buffer group 2 output channel 2. 3-state output driven from 2A2 when 2OE is low; high-impedance when 2OE is high. |+| 8 | 1A4 | input | Buffer group 1 data input channel 4. Standard CMOS input; drives corresponding 1Y4 output when 1OE is low. |+| 9 | 2Y1 | tri_state | Buffer group 2 output channel 1. 3-state output driven from 2A1 when 2OE is low; high-impedance when 2OE is high. |+| 10 | GND | power_in | Ground reference for the device. Connect to system ground with a low-impedance return path. |+| 11 | 2A1 | input | Buffer group 2 data input channel 1. Standard CMOS input; drives corresponding 2Y1 output when 2OE is low. |+| 12 | 1Y4 | tri_state | Buffer group 1 output channel 4. 3-state output driven from 1A4 when 1OE is low; high-impedance when 1OE is high. |+| 13 | 2A2 | input | Buffer group 2 data input channel 2. Standard CMOS input; drives corresponding 2Y2 output when 2OE is low. |+| 14 | 1Y3 | tri_state | Buffer group 1 output channel 3. 3-state output driven from 1A3 when 1OE is low; high-impedance when 1OE is high. |+| 15 | 2A3 | input | Buffer group 2 data input channel 3. Standard CMOS input; drives corresponding 2Y3 output when 2OE is low. |+| 16 | 1Y2 | tri_state | Buffer group 1 output channel 2. 3-state output driven from 1A2 when 1OE is low; high-impedance when 1OE is high. |+| 17 | 2A4 | input | Buffer group 2 data input channel 4. Standard CMOS input; drives corresponding 2Y4 output when 2OE is low. |+| 18 | 1Y1 | tri_state | Buffer group 1 output channel 1. 3-state output driven from 1A1 when 1OE is low; high-impedance when 1OE is high. |+| 19 | 2OE | input | Active-low output-enable for buffer group 2 (2Y1-2Y4). When low, the 2Y outputs are enabled; when high, the 2Y outputs are placed in the high-impedance (3-state) mode. |+| 20 | VCC | power_in | Positive supply voltage, 2 V to 5.5 V operating range. Decouple locally with a 0.1 uF ceramic capacitor to GND. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | TSSOP-20 |+| Category | Logic |+| Pins | 20 |++## Ordering variants++- `SN74LV244APWRPW`+- `SN74LV244APWRPWR`+- `SN74LV244APWRDB`+- `SN74LV244APWRDBR`+- `SN74LV244APWRDGV`+- `SN74LV244APWRDGVR`+- `SN74LV244APWRDW`+- `SN74LV244APWRDWR`+- `SN74LV244APWRNS`+- `SN74LV244APWRNSR`+- `SN74LV244APWRRGY`+- `SN74LV244APWRRGYR`+- `SN74LV244APWRRKS`+- `SN74LV244APWRRKSR`+- `SN74LV244APWRDGS`+- `SN74LV244APWRDGSR`++## CAD (KiCad official)++- Symbol: `SN74LV244APWR`+- 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/sn74lv244a.pdf) (42 pp, sha256 `cd9506c8b2555370`, 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/sn74lv244apwr-datasheet.pdf)

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