74HC4051PW,118

74HC4051PW,118 is an 8-channel analog multiplexer/demultiplexer (from the 74HC family). It lets one common I/O (Z) connect to any one of eight bidirectional inputs (Y0–Y7) under control of three select lines A,B,C. An INH input can disable all channels (high-impedance).
Key points:
- Bidirectional analog routing: any Y0–Y7 can connect to Z within the supply range.
- Supply: Vcc typically 2–6 V (HC family).
- On-resistance: roughly a few hundred ohms (≈100–125 Ω at 5 V, varies by part).
- Off leakage: microamps; fast switching (tens of ns range).
- Pinout: Y0–Y7, Z, Vcc, GND, INH, A,B,C (plus other package pins depending on package).
PW indicates the package type (plastic/package variant); 118 is usually a date/lot or internal variant code, not a functional spec. Check the datasheet for exact pinout and specs for your exact package.

Possible equivalents (8-channel analog multiplexer/demultiplexer in the 4051 family):
- SN74HC4051 (TI)
- SN74HCT4051 (TI)
- SN74LVC4051 / SN74LV4051 (low‑voltage variants)
- CD4051B / CD4051 (older CMOS, from Motorola/NXP)
- 4051B variants from Renesas/Toshiba/ON Semiconductor, etc.
In short: any 8-channel 4051 CMOS/TTL-compatible mux/demux (HC, HCT, LVC/LV) can substitute.

74HC4051PW,118 features:
- 8-channel single-ended analog multiplexer/demultiplexer (one of eight channels)
- 3 binary select inputs (S1, S2, S3) to choose channel 0–7
- One common I/O port (COM) that connects to the selected channel
- Analog signal range: from 0 V up to Vcc
- Wide supply: typically 2 V to 6 V (HC family)
- On-resistance: typical ~125 Ω at Vcc = 5 V (low and stable)
- Low OFF leakage (Ioff): suitable for multiplexing signals with minimal bleed-through
- Break-before-make switching
- Low-power CMOS device
- Operating temperature: -40 °C to +85 °C
- Package: PW (16-pin plastic package)
Note: exact numbers (Ron, Ioff, temp range) are typical/specs and may vary by lot. Refer to the specific datasheet revision for precise figures.

- Pin count: 16 pins (DIP Plastic, PW package).
- Function: 8-channel analog multiplexer/demultiplexer. Connects one of eight inputs/outputs (X0–X7) to a common I/O (COM) based on three select lines (S1–S3); includes an inhibit input (INH) to disable all channels; operates from a single supply (Vcc/Vss).

Manufacturer: NXP Semiconductors (formerly Philips Semiconductors).
About the company: NXP is a Dutch multinational semiconductor company that designs, manufactures, and sells integrated circuits and related electronics for automotive, industrial, consumer, and communications markets.

The 74HC4051PW,118 is in a 16‑pin Plastic Small Outline package (SOIC/SOP). PW denotes Plastic Small Outline. The 118 is a lot/date code, not a package type.