component

74LCX245MTCX

Public Unreviewed

by Ray

onsemi Buffer/Driver/Transceiver, TSSOP-20. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentlogic74lcx245mtcx
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

Symbol & Footprint

Schematic Symbol

Open full view ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

PCB Footprint

Open full view ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

Datasheet

Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.
Download PDF
Contents

README

markdown

74LCX245MTCX

onsemi · Buffer/Driver/Transceiver · TSSOP-20

74LCX245MTCX from onsemi, 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 T/R input Transmit/Receive input. Determines the direction of data flow: LOW routes B->A, HIGH routes A->B (when OE is LOW).
2 A0 bidirectional Side A bidirectional bus pin 0. Acts as input when T/R=H, or 3-STATE output when T/R=L (with OE=L). High-Z when OE=H. 5V tolerant.
3 A1 bidirectional Side A bidirectional bus pin 1. Acts as input when T/R=H, or 3-STATE output when T/R=L (with OE=L). 5V tolerant.
4 A2 bidirectional Side A bidirectional bus pin 2. Acts as input when T/R=H, or 3-STATE output when T/R=L (with OE=L). 5V tolerant.
5 A3 bidirectional Side A bidirectional bus pin 3. Acts as input when T/R=H, or 3-STATE output when T/R=L (with OE=L). 5V tolerant.
6 A4 bidirectional Side A bidirectional bus pin 4. Acts as input when T/R=H, or 3-STATE output when T/R=L (with OE=L). 5V tolerant.
7 A5 bidirectional Side A bidirectional bus pin 5. Acts as input when T/R=H, or 3-STATE output when T/R=L (with OE=L). 5V tolerant.
8 A6 bidirectional Side A bidirectional bus pin 6. Acts as input when T/R=H, or 3-STATE output when T/R=L (with OE=L). 5V tolerant.
9 A7 bidirectional Side A bidirectional bus pin 7. Acts as input when T/R=H, or 3-STATE output when T/R=L (with OE=L). 5V tolerant.
10 GND power_in Ground reference (0V). Return for all supply and I/O currents.
11 B7 bidirectional Side B bidirectional bus pin 7. Acts as input when T/R=L, or 3-STATE output when T/R=H (with OE=L). 5V tolerant.
12 B6 bidirectional Side B bidirectional bus pin 6. Acts as input when T/R=L, or 3-STATE output when T/R=H (with OE=L). 5V tolerant.
13 B5 bidirectional Side B bidirectional bus pin 5. Acts as input when T/R=L, or 3-STATE output when T/R=H (with OE=L). 5V tolerant.
14 B4 bidirectional Side B bidirectional bus pin 4. Acts as input when T/R=L, or 3-STATE output when T/R=H (with OE=L). 5V tolerant.
15 B3 bidirectional Side B bidirectional bus pin 3. Acts as input when T/R=L, or 3-STATE output when T/R=H (with OE=L). 5V tolerant.
16 B2 bidirectional Side B bidirectional bus pin 2. Acts as input when T/R=L, or 3-STATE output when T/R=H (with OE=L). 5V tolerant.
17 B1 bidirectional Side B bidirectional bus pin 1. Acts as input when T/R=L, or 3-STATE output when T/R=H (with OE=L). 5V tolerant.
18 B0 bidirectional Side B bidirectional bus pin 0. Acts as input when T/R=L, or 3-STATE output when T/R=H (with OE=L). 5V tolerant.
19 OE input Output Enable input (active LOW). When HIGH, both A and B ports are forced to high-impedance (3-STATE). To ensure high-Z during power-up/down, tie OE to VCC through a pull-up resistor.
20 VCC power_in Positive supply voltage. Operating range 2.0V to 3.6V (recommended), data retention 1.5V to 3.6V. Absolute max -0.5V to +7.0V. Inputs/outputs are 5V tolerant.

Key specifications

Parameter Value
Manufacturer onsemi
Package TSSOP-20
Category Logic
Pins 20

Ordering variants

Same part, different packaging or reel option.

  • 74LCX245MTCX
  • 74LCX245MTCX_NL
  • 74LCX245MTCXWM
  • 74LCX245MTCXWMX_NL
  • 74LCX245MTCXSJ
  • 74LCX245MTCXMSA
  • 74LCX245MTCXBQX

CAD (KiCad official)

  • Symbol: 74LCX245MTCX
  • 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: onsemi datasheet (12 pp, sha256 5d4f8993e360a70a, retrieved 2026-08-17, tier: lcsc)
  • 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