# SN74ABT241AN

**Texas Instruments** · Buffer/Driver/Transceiver · PDIP-20

SN74ABT241AN from Texas Instruments, in a PDIP-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 | Active-low output enable for outputs 1Y1 to 1Y4; a high level forces these outputs to high impedance, and the datasheet recommends a pullup to VCC so the outputs stay high-Z during power-up and power-down. |
| 2 | 1A1 | input | Data input for noninverting buffer channel 1Y1; unused inputs must be held high or low to prevent them from floating. |
| 3 | 2Y4 | tri_state | 3-state output of channel 2A4 (noninverting); high-drive outputs rated -32 mA IOH and 64 mA IOL. |
| 4 | 1A2 | input | Data input for noninverting buffer channel 1Y2; unused inputs must be held high or low to prevent them from floating. |
| 5 | 2Y3 | tri_state | 3-state output of channel 2A3 (noninverting); high-drive outputs rated -32 mA IOH and 64 mA IOL. |
| 6 | 1A3 | input | Data input for noninverting buffer channel 1Y3; unused inputs must be held high or low to prevent them from floating. |
| 7 | 2Y2 | tri_state | 3-state output of channel 2A2 (noninverting); high-drive outputs rated -32 mA IOH and 64 mA IOL. |
| 8 | 1A4 | input | Data input for noninverting buffer channel 1Y4; unused inputs must be held high or low to prevent them from floating. |
| 9 | 2Y1 | tri_state | 3-state output of channel 2A1 (noninverting); high-drive outputs rated -32 mA IOH and 64 mA IOL. |
| 10 | GND | power_in | Ground reference pin; the datasheet requires OE pins to be tied to GND through a pulldown resistor only when used for that purpose. |
| 11 | 2A1 | input | Data input for noninverting buffer channel 2Y1; unused inputs must be held high or low to prevent them from floating. |
| 12 | 1Y4 | tri_state | 3-state output of channel 1A4 (noninverting); high-drive outputs rated -32 mA IOH and 64 mA IOL. |
| 13 | 2A2 | input | Data input for noninverting buffer channel 2Y2; unused inputs must be held high or low to prevent them from floating. |
| 14 | 1Y3 | tri_state | 3-state output of channel 1A3 (noninverting); high-drive outputs rated -32 mA IOH and 64 mA IOL. |
| 15 | 2A3 | input | Data input for noninverting buffer channel 2Y3; unused inputs must be held high or low to prevent them from floating. |
| 16 | 1Y2 | tri_state | 3-state output of channel 1A2 (noninverting); high-drive outputs rated -32 mA IOH and 64 mA IOL. |
| 17 | 2A4 | input | Data input for noninverting buffer channel 2Y4; unused inputs must be held high or low to prevent them from floating. |
| 18 | 1Y1 | tri_state | 3-state output of channel 1A1 (noninverting); high-drive outputs rated -32 mA IOH and 64 mA IOL. |
| 19 | 2OE | input | Active-high output enable for outputs 2Y1 to 2Y4; a low level forces these outputs to high impedance. |
| 20 | VCC | power_in | Supply voltage, recommended operating range 4.5 V to 5.5 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | PDIP-20 |
| Category | Logic ICs |
| 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 |  | 3 |
| Input voltage range | VI | -0.5 |  | 7 | V | see Note 1 | 3 |
| Voltage applied to any output in high or power-off state | VO | -0.5 |  | 5.5 | V |  | 3 |
| Current into any output in low state (SN74ABT241A) | IO |  |  | 128 | mA |  | 3 |
| Input clamp current | IIK |  |  | -18 | mA | VI < 0 | 3 |
| Output clamp current | IOK |  |  | -50 | mA | VO < 0 | 3 |
| Package thermal impedance, N package | θJA |  |  | 67 | °C/W | N package; see Note 2 | 3 |
| Storage temperature range | Tstg | -65 |  | 150 | °C |  | 3 |
| Supply voltage | VCC | 4.5 |  | 5.5 | V |  | 3 |
| High-level input voltage | VIH | 2 |  |  | V |  | 3 |
| Low-level input voltage | VIL |  |  | 0.8 | V |  | 3 |
| Input voltage | VI | 0 |  |  | V | maximum is VCC | 3 |
| High-level output current (SN74ABT241A) | IOH |  |  | -32 | mA |  | 3 |
| Low-level output current (SN74ABT241A) | IOL |  |  | 64 | mA |  | 3 |
| Input transition rise or fall rate | Δt/Δv |  |  | 5 | ns/V | Outputs enabled | 3 |
| Operating free-air temperature | TA | -40 |  | 85 | °C |  | 3 |
| Input clamp voltage | VIK |  |  | -1.2 | V | VCC = 4.5 V, II = -18 mA | 4 |
| High-level output voltage | VOH | 2.5 |  |  | V | VCC = 4.5 V, IOH = -3 mA | 4 |
| High-level output voltage | VOH | 3 |  |  | V | VCC = 5 V, IOH = -3 mA | 4 |
| High-level output voltage | VOH | 2 |  |  | V | VCC = 4.5 V, IOH = -32 mA | 4 |
| Low-level output voltage | VOL |  |  | 0.55 | V | VCC = 4.5 V, IOL = 64 mA | 4 |
| Input current | II | -1 |  | 1 | µA | VCC = 5.5 V, VI = VCC or GND | 4 |
| Off-state output current, high-level voltage applied | IOZH |  |  | 10 | µA | VCC = 5.5 V, VO = 2.7 V | 4 |
| Off-state output current, low-level voltage applied | IOZL |  |  | -10 | µA | VCC = 5.5 V, VO = 0.5 V | 4 |
| Power-off output current | Ioff | -100 |  | 100 | µA | VCC = 0, VI or VO ≤ 4.5 V | 4 |
| Output high leakage current | ICEX |  |  | 50 | µA | VCC = 5.5 V, VO = 5.5 V, outputs high | 4 |
| Short-circuit output current | IO | -50 | -100 | -180 | mA | VCC = 5.5 V, VO = 2.5 V | 4 |
| Supply current, outputs high | ICC |  | 1 | 250 | µA | VCC = 5.5 V, IO = 0, VI = VCC or GND; outputs high | 4 |
| Supply current, outputs low | ICC |  | 24 | 30 | mA | VCC = 5.5 V, IO = 0, VI = VCC or GND; outputs low | 4 |
| Supply current, outputs disabled | ICC |  | 0.5 | 250 | µA | VCC = 5.5 V, IO = 0, VI = VCC or GND; outputs disabled | 4 |
| Increase in supply current per data input, outputs enabled | ΔICC |  |  | 1.5 | mA | VCC = 5.5 V, one data input at 3.4 V, other inputs at VCC or GND; outputs enabled | 4 |
| Increase in supply current per data input, outputs disabled | ΔICC |  |  | 0.05 | mA | VCC = 5.5 V, one data input at 3.4 V, other inputs at VCC or GND; outputs disabled | 4 |
| Increase in supply current per control input | ΔICC |  |  | 1.5 | mA | VCC = 5.5 V, one input at 3.4 V, other inputs at VCC or GND | 4 |
| Propagation delay low-to-high, A to Y | tPLH | 1 | 2.6 | 4.6 | ns | CL = 50 pF, A to Y, see Figure 1 | 5 |
| Propagation delay high-to-low, A to Y | tPHL | 1 | 2.9 | 4.6 | ns | CL = 50 pF, A to Y, see Figure 1 | 5 |
| Enable time low-to-high, OE to Y | tPZH | 1.1 | 4.8 | 6.8 | ns | CL = 50 pF, OE or OE to Y, see Figure 1 | 5 |
| Enable time high-to-low, OE to Y | tPZL | 1.3 | 4.3 | 6.8 | ns | CL = 50 pF, OE or OE to Y, see Figure 1 | 5 |
| Disable time high-to-off, OE to Y | tPHZ | 1.6 | 4.6 | 7.1 | ns | CL = 50 pF, OE or OE to Y, see Figure 1 | 5 |
| Disable time low-to-off, OE to Y | tPLZ | 1 | 3.9 | 5.9 | ns | CL = 50 pF, OE or OE to Y, see Figure 1 | 5 |

## CAD (KiCad official)

- Symbol: `SN74ABT241AN`
- Footprint: `Package_DIP:DIP-20_W7.62mm`
- 3D model: PDIP-20 (KiCad packages3D, STEP)
- 3D model files: `sn74abt241an-etched.step` / `sn74abt241an-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74abt241an.step` / `sn74abt241an.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/sn74abt241an.pdf) (25 pp, sha256 `ed988ed6fbe1cb10`, retrieved 2026-10-31, tier: manufacturer)
- **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/sn74abt241an-datasheet.pdf)