74AXP4T245BQX

74AXP4T245BQX is an 8-bit bidirectional bus transceiver from TI’s 74AXP CMOS family. It connects two 8-bit buses (A0–A7 and B0–B7) and lets data flow in either direction.
Key points:
- DIR selects the data direction (A→B or B→A).
- OE (output enable) controls tri-stating; when not enabled, the outputs are high-impedance, allowing buses to share a line without contention.
- Used to buffer/isolate data paths, bridge buses between subsystems, or implement simple level/bus interfacing.
Typical packaging/specifics:
- The suffix BQX denotes the particular packaging and temperature grade; see the datasheet for exact options.
In short, the 74AXP4T245BQX is a flexible 8-bit, two-way buffer/translator ideal for bus interfacing, memory-mapped I/O, and microprocessor peripherals where controlled, bidirectional data flow is needed.

Equivalent products: 8-bit bidirectional bus transceivers with 3-state outputs (DIR and OE).
- TI: SN74AXP4T245
- ON Semiconductor: MC74AXP4T245
Other vendors offer similar 74LVC245/74AXP variants; ensure the voltage range and pinout match your design.

Here are the key features of 74AXP4T245BQX:
- 4-bit bidirectional bus transceiver with 3-state outputs
- A and B data paths (4 lines each)
- DIR input to select A→B or B→A; OE (output enable) to place outputs in high-impedance
- Ioff support for partial-power-down protection (no back-powering of other circuitry)
- ESD protection on all I/O pins; robust CMOS logic
- High-speed, low-power CMOS technology
- Wide supply/logic-level range suitable for CMOS/TTL-compatible interfaces
- Industrial temperature variant (typical -40°C to +125°C)
- Pb-free, halogen-free package (BQX suffix) suitable for surface mount applications
Intended use: bus interconnects, microcontroller I/O expansion, and other bidirectional data-path applications.

- Pin count: 20 pins (package is typically TSSOP20 for BQX suffix).
- Function: 4-bit bidirectional bus transceiver with 3-state outputs. Data can flow A0–A3 <-> B0–B3 in either direction controlled by DIR, with an active-low output enable (/OE) to tri-state the bus.

- Manufacturer: Texas Instruments (TI).
- What kind of company: A multinational semiconductor company that designs and manufactures analog and digital integrated circuits; one of the world’s largest semiconductor makers, headquartered in Dallas, Texas.

74AXP4T245BQX is a 4-bit bidirectional bus transceiver with DIR and OE control. It buffers data between two buses, enabling high-speed bidirectional transfer and optional isolation/level handling in mixed-voltage systems (with proper rails).
Typical applications:
- Microprocessor/memory data buses
- Peripheral interfacing
- Address/data multiplexing/demultiplexing
- Backplane or inter-board interconnects
- General I/O expansion in embedded, industrial, and automotive electronics

20-pin plastic small-outline package (TSSOP-20).