SN74HCT245PW

SN74HCT245PW is an 8-bit bidirectional bus transceiver with tri‑state outputs. It buffers data between two 8‑bit buses and can translate levels, using TTL‑compatible HCT inputs.
Key features
- 8-bit A/B ports with direction control (DIR) and active‑low output enable (/OE)
- When /OE is low, data flows A→B if DIR=0, or B→A if DIR=1; when /OE is high, outputs are high‑impedance
- 4.5–5.5 V supply; compatible with TTL input thresholds
- 3-state outputs allow multiple devices on a common bus
- Packaging: PW suffix denotes TI’s 20‑pin plastic package for this part
Common uses
- Microprocessor/memory bus interfacing and buffering
- Isolating/buffering signals between different voltage domains
- General bidirectional data buffering in digital systems
In short, the SN74HCT245PW is a flexible, TTL‑friendly bus transceiver ideal for safe bidirectional data buffering on a shared data bus.

Equivalents (8-bit bidirectional bus transceivers, 3-state) to SN74HCT245PW include:
- Nexperia: 74HCT245N, 74HCT245D, 74HCT245W
- Toshiba: TC74HCT245
- Renesas: uPD74HCT245
- Onsemi: 74HCT245 (D, N, or PW variants in similar packages)
Note: verify pinout and package compatibility; electrical specs are the same within the HCT family.

Key features of SN74HCT245PW:
- Octal (8-bit) bidirectional bus transceiver with 3-state outputs
- Direction control (DIR) to select A↔B data flow
- Output Enable (OE), active-low, to tri-state all outputs
- Non-inverting data path
- TTL-compatible inputs; operates from 4.5 V to 5.5 V (HCT family)
- Fast CMOS performance with low static power
- 20-pin PW package (Plastic Small Outline)
- Ideal for bus interfacing (microprocessors, memory, peripherals) requiring bidirectional data transfer with high-impedance state when not driven

- Pin count: 20 pins (DIP-20 package, SN74HCT245PW).
- Function: 8-bit bidirectional bus transceiver with 3-state outputs. Data can flow A↔B depending on DIR; an active-low /OE enables or tri-states the outputs.

- Manufacturer: Texas Instruments (TI)
- What kind of company: An American multinational corporation that designs and manufactures semiconductors and integrated circuits (a leading global semiconductor company).

SN74HCT245PW is an 8-bit bidirectional bus transceiver with 3-state outputs. Typical applications include:
- Buffering/isolating an 8-bit data bus between a CPU/microcontroller and memory or peripherals
- Bidirectional data transfer on a shared bus using DIR and OE for direction control
- Bus multiplexing or address/data bus management in microprocessor systems
- I/O expansion and signal integrity improvement in embedded boards and instrumentation
- Level-compatible buffering for 5V TTL/CMOS interfaces (within device ratings) to bridge devices with different drive strengths

The SN74HCT245PW comes in a Plastic Small-Outline Package (SOIC), 20-pin.