74HC245PW,118

74HC245PW,118 is an octal bidirectional bus transceiver from the 74HC family with 3-state outputs.
What it does:
- Interfaces two 8‑bit buses (A0–A7 and B0–B7) and transfers data in either direction.
- Controlled by DIR (direction) and OE (output enable, active low).
- When OE is low, the selected bus drives the opposite bus; when OE is high, all outputs are high-impedance.
Key notes:
- Power: Vcc (2–6 V, typical 5 V); CMOS inputs; fast switching.
- DIR selects data flow: 0 = A→B, 1 = B→A.
- OE gates the outputs (disable = high impedance).
- 20‑pin package (PW suffix: Plastic DIP); -118 is likely a date/lot code or process variant—check the exact datasheet for your part.
Typical use:
- Connect one bus to a microprocessor or controller, the other to memory/peripherals; toggle DIR and OE as needed to shuttle data or to isolate buses.
Pinout reminder (general): A0–A7 on one side, B0–B7 on the other, with DIR, OE, Vcc, and GND as control/power pins.

Equivalent parts for 74HC245PW,118 (octal bus transceiver, 3-state): TI SN74HC245; TI SN74HCT245; NXP/Nexperia 74HC245; STMicroelectronics 74HC245; Renesas uPD74HC245; ON Semiconductor MM74HC245. If TTL-like inputs are needed, use SN74HCT245/MM74HCT245 equivalents. Generally, any vendor’s 74HC245 or 74HCT245 will substitute at the same supply voltage.

Here are the key features of the 74HC245PW,118 (8-bit bidirectional bus transceiver with 3-state outputs):
- 8-bit bidirectional data bus (A0–A7 × B0–B7) with 3-state outputs
- Direction control input (DIR) to select data flow A→B or B→A
- Output Enable (OE, active LOW) to Tri-State both ports
- Wide supply range: Vcc = 2V to 6V (works with 5V and 3.3V systems)
- CMOS HC technology: low power consumption
- High-speed operation (tpd in the low tens of nanoseconds range at 5V, per datasheet)
- ESD protection on input pins
- Packaging: plastic DIP, 20 pins (PW variant)
- Suitable for bus-sharing applications and simple level-shifting with proper timing
Note: exact propagation delays and voltage/temperature specs depend on the specific datasheet revision.

- Pin count: 20 pins (DIP-20; PW package)
- Function: Octal bidirectional 3-state bus transceiver. It has two 8-bit data buses (A0–A7 and B0–B7) with a direction control (DIR) and an output-enable (/OE). Data can transfer A↔B depending on DIR, and the outputs go high-impedance when /OE is high. Power pins (Vcc/GND) are included.

Manufacturer: NXP Semiconductors (formerly Philips Semiconductors).
What kind of company: Dutch multinational electronics company that designs and manufactures semiconductors and related components for automotive, industrial, networking, and consumer markets.

- 74HC245PW: Octal bidirectional bus transceiver with 3-state outputs. Applications: buffering data/address lines between CPU/memory and peripherals; bus isolation, level shifting, and drive-strength management in microprocessor/microcontroller systems, memory expansion, and backplane interconnects. Controlled by DIR and OE; supports bidirectional data flow.
- 74HC118: 3-to-8 decoder/demultiplexer (with enables). Applications: address decoding and peripheral selection in microprocessor systems, memory-map decoders, and demultiplexing control/address lines to enable specific devices on a bus.

PW indicates the Plastic Wide Small-Outline (SO) 20‑pin package. The “118” is a date/lot code.