# SN74LV244ADBR

**Texas Instruments** · Buffers, Drivers, Receivers, Transceivers · SSOP-20

SN74LV244ADBR from Texas Instruments, in a SSOP-20. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | 1OE | input | Output enable for the first four-bit buffer section (1Y1 to 1Y4); the extracted text does not state the enable polarity. |
| 2 | 1A1 | input | Data input to buffer 1 of the first section, which drives output 1Y1 when 1OE is enabled; absolute input voltage limits are -0.5 V to 7 V (page 4). |
| 3 | 2Y4 | output | Three-state output of buffer 4 of the second section, driven from 2A4; continuous output current is limited to ±35 mA for VO = 0 to VCC (page 4). |
| 4 | 1A2 | input | Data input to buffer 2 of the first section, which drives output 1Y2; absolute input voltage limits are -0.5 V to 7 V (page 4). |
| 5 | 2Y3 | output | Three-state output of buffer 3 of the second section, driven from 2A3; continuous output current is limited to ±35 mA for VO = 0 to VCC (page 4). |
| 6 | 1A3 | input | Data input to buffer 3 of the first section, which drives output 1Y3; absolute input voltage limits are -0.5 V to 7 V (page 4). |
| 7 | 2Y2 | output | Three-state output of buffer 2 of the second section, driven from 2A2; continuous output current is limited to ±35 mA for VO = 0 to VCC (page 4). |
| 8 | 1A4 | input | Data input to buffer 4 of the first section, which drives output 1Y4; absolute input voltage limits are -0.5 V to 7 V (page 4). |
| 9 | 2Y1 | output | Three-state output of buffer 1 of the second section, driven from 2A1; continuous output current is limited to ±35 mA for VO = 0 to VCC (page 4). |
| 10 | GND | power_in | Ground reference pin for the device. |
| 11 | 2A1 | input | Data input to buffer 1 of the second section, which drives output 2Y1; absolute input voltage limits are -0.5 V to 7 V (page 4). |
| 12 | 1Y4 | output | Three-state output of buffer 4 of the first section, driven from 1A4; continuous output current is limited to ±35 mA for VO = 0 to VCC (page 4). |
| 13 | 2A2 | input | Data input to buffer 2 of the second section, which drives output 2Y2; absolute input voltage limits are -0.5 V to 7 V (page 4). |
| 14 | 1Y3 | output | Three-state output of buffer 3 of the first section, driven from 1A3; continuous output current is limited to ±35 mA for VO = 0 to VCC (page 4). |
| 15 | 2A3 | input | Data input to buffer 3 of the second section, which drives output 2Y3; absolute input voltage limits are -0.5 V to 7 V (page 4). |
| 16 | 1Y2 | output | Three-state output of buffer 2 of the first section, driven from 1A2; continuous output current is limited to ±35 mA for VO = 0 to VCC (page 4). |
| 17 | 2A4 | input | Data input to buffer 4 of the second section, which drives output 2Y4; absolute input voltage limits are -0.5 V to 7 V (page 4). |
| 18 | 1Y1 | output | Three-state output of buffer 1 of the first section, driven from 1A1; continuous output current is limited to ±35 mA for VO = 0 to VCC (page 4). |
| 19 | 2OE | input | Output enable for the second four-bit buffer section (2Y1 to 2Y4); the extracted text does not state the enable polarity. |
| 20 | VCC | power_in | Supply pin; the device operates from 2 V to 5.5 V (page 1), and the absolute maximum supply is -0.5 V to 7 V (page 4). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SSOP-20 |
| Category | Logic |
| Pins | 20 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage | VCC | -0.5 |  | 7 | V |  | 4 |
| Input voltage | VI | -0.5 |  | 7 | V |  | 4 |
| Voltage range applied to any output in the high-impedance or power-off state | VO | -0.5 |  | 7 | V |  | 4 |
| Output voltage | VO | -0.5 |  |  | V | Max printed as VCC + 0.5; footnote 3: value limited to 5.5-V maximum | 4 |
| Input clamp current | IIK | -20 |  |  | mA | VI < 0 | 4 |
| Output clamp current | IOK | -50 |  |  | mA | VO < 0 | 4 |
| Continuous output current | IO | -35 |  | 35 | mA | VO = 0 to VCC | 4 |
| Continuous current through VCC or GND |  | -70 |  | 70 | mA |  | 4 |
| Junction temperature | Tj | -65 |  | 150 | °C |  | 4 |
| Storage temperature | Tstg | -65 |  | 150 | °C |  | 4 |
| Supply voltage | VCC | 2 |  | 5.5 | V |  | 5 |
| High-level input voltage | VIH | 1.5 |  |  | V | VCC = 2 V | 5 |
| Low-level input voltage | VIL |  |  | 0.5 | V | VCC = 2 V | 5 |
| Input voltage | VI | 0 |  | 5.5 | V |  | 5 |
| Output voltage | VO | 0 |  |  | V | High or low state; max printed as VCC | 5 |
| Output voltage | VO | 0 |  | 5.5 | V | 3-state | 5 |
| High-level output current | IOH | -50 |  |  | µA | VCC = 2 V | 5 |
| High-level output current | IOH | -2 |  |  | mA | VCC = 2.3 V to 2.7 V | 5 |
| High-level output current | IOH | -8 |  |  | mA | VCC = 3 V to 3.6 V | 5 |
| High-level output current | IOH | -16 |  |  | mA | VCC = 4.5 V to 5.5 V | 5 |
| Low-level output current | IOL |  |  | 50 | µA | VCC = 2 V | 5 |
| Low-level output current | IOL |  |  | 2 | mA | VCC = 2.3 V to 2.7 V | 5 |
| Low-level output current | IOL |  |  | 8 | mA | VCC = 3 V to 3.6 V | 5 |
| Low-level output current | IOL |  |  | 16 | mA | VCC = 4.5 V to 5.5 V | 5 |
| Input transition rise or fall rate | Δt/Δv |  |  | 200 | ns/V | VCC = 2.3 V to 2.7 V | 5 |
| Input transition rise or fall rate | Δt/Δv |  |  | 100 | ns/V | VCC = 3 V to 3.6 V | 5 |
| Input transition rise or fall rate | Δt/Δv |  |  | 20 | ns/V | VCC = 4.5 V to 5.5 V | 5 |
| Operating free-air temperature | TA | -40 |  | 125 | °C |  | 5 |
| High level output voltage | VOH | 2 |  |  | V | IOH = -2 mA; VCC = 2.3 V | 7 |
| High level output voltage | VOH | 2.48 |  |  | V | IOH = -8 mA; VCC = 3 V | 7 |
| High level output voltage | VOH | 3.8 |  |  | V | IOH = 16 mA; VCC = 4.5 V | 7 |
| Low level output voltage | VOL |  |  | 0.1 | V | IOL = 50 µA; VCC = 2 V to 5.5 V | 7 |
| Low level output voltage | VOL |  |  | 0.4 | V | IOL = 2 mA; VCC = 2.3 V | 7 |
| Low level output voltage | VOL |  |  | 0.44 | V | IOL = 8 mA; VCC = 3 V | 7 |
| Low level output voltage | VOL |  |  | 0.55 | V | IOL = 16 mA; VCC = 4.5 V | 7 |
| Input leakage current | II | -1 |  | 1 | µA | VI = 5.5 V or GND; VCC = 0 to 5.5 V | 7 |
| Off-state (high-impedance state) output current | IOZ | -5 |  | 5 | µA | VO = VCC or GND; VCC = 5.5 V | 7 |
| Supply current | ICC |  |  | 20 | µA | VI = VCC or GND, IO = 0; VCC = 5.5 V | 7 |
| Input/output power-off leakage current | Ioff |  |  | 5 | µA | VI or VO = 0 to 5.5 V; VCC = 0 | 7 |
| Propagation delay time, A to Y | tpd | 1 |  | 15 | ns | CL = 15 pF; VCC = 2.5 V ± 0.2 V; -40°C to 125°C | 8 |
| Propagation delay time, A to Y | tpd | 1 |  | 18 | ns | CL = 50 pF; VCC = 2.5 V ± 0.2 V; -40°C to 125°C | 8 |
| Enable time, OE to Y | ten | 1 |  | 17 | ns | CL = 15 pF; VCC = 2.5 V ± 0.2 V; -40°C to 125°C | 8 |
| Enable time, OE to Y | ten | 1 |  | 21 | ns | CL = 50 pF; VCC = 2.5 V ± 0.2 V; -40°C to 125°C | 8 |
| Disable time, OE to Y | tdis | 1 |  | 16 | ns | CL = 15 pF; VCC = 2.5 V ± 0.2 V; -40°C to 125°C | 8 |
| Disable time, OE to Y | tdis | 1 |  | 21 | ns | CL = 50 pF; VCC = 2.5 V ± 0.2 V; -40°C to 125°C | 8 |
| Propagation delay time, A to Y | tpd | 1 |  | 10 | ns | CL = 15 pF; VCC = 3.3 V ± 0.3 V; -40°C to 125°C | 8 |
| Propagation delay time, A to Y | tpd | 1 |  | 13.5 | ns | CL = 50 pF; VCC = 3.3 V ± 0.3 V; -40°C to 125°C | 8 |
| Enable time, OE to Y | ten | 1 |  | 12.5 | ns | CL = 15 pF; VCC = 3.3 V ± 0.3 V; -40°C to 125°C | 8 |
| Enable time, OE to Y | ten | 1 |  | 16 | ns | CL = 50 pF; VCC = 3.3 V ± 0.3 V; -40°C to 125°C | 8 |
| Disable time, OE to Y | tdis | 1 |  | 13 | ns | CL = 15 pF; VCC = 3.3 V ± 0.3 V; -40°C to 125°C | 8 |
| Disable time, OE to Y | tdis | 1 |  | 18 | ns | CL = 50 pF; VCC = 3.3 V ± 0.3 V; -40°C to 125°C | 8 |
| Propagation delay time, A to Y | tpd | 1 |  | 6.5 | ns | CL = 15 pF; VCC = 5 V ± 0.5 V; -40°C to 125°C | 8 |
| Propagation delay time, A to Y | tpd | 1 |  | 8.5 | ns | CL = 50 pF; VCC = 5 V ± 0.5 V; -40°C to 125°C | 8 |
| Enable time, OE to Y | ten | 1 |  | 8.5 | ns | CL = 15 pF; VCC = 5 V ± 0.5 V; -40°C to 125°C | 8 |
| Enable time, OE to Y | ten | 1 |  | 10.5 | ns | CL = 50 pF; VCC = 5 V ± 0.5 V; -40°C to 125°C | 8 |
| Disable time, OE to Y | tdis | 1 |  | 13.5 | ns | CL = 15 pF; VCC = 5 V ± 0.5 V; -40°C to 125°C | 8 |
| Disable time, OE to Y | tdis | 1 |  | 15.5 | ns | CL = 50 pF; VCC = 5 V ± 0.5 V; -40°C to 125°C | 8 |
| Junction-to-ambient thermal resistance (DB SSOP) | RθJA |  | 94.7 |  | °C/W |  | 5 |
| Junction-to-case (top) thermal resistance (DB SSOP) | RθJC(top) |  | 56.7 |  | °C/W |  | 5 |
| Junction-to-board thermal resistance (DB SSOP) | RθJB |  | 49.9 |  | °C/W |  | 5 |

## CAD (KiCad official)

- Symbol: `SN74LV244ADBR`
- Footprint: `Adom_Gen:Texas_Instruments_SN74`
- 3D model: SSOP-20 (KiCad packages3D, STEP)
- 3D model files: `sn74lv244adbr-etched.step` / `sn74lv244adbr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74lv244adbr.step` / `sn74lv244adbr.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/sn74lv244adbr.pdf) (43 pp, sha256 `ee9a8c6b17f23c55`, retrieved 2026-10-18, tier: manufacturer)
- **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:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/sn74lv244adbr-datasheet.pdf)