Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Configuration | 1-channel 8:1 analog mux/demux |
| Control Supply | 4.5 V to 5.5 V operating control range |
| Analog Switch Range | 0 V to 10 V span / up to ±5 V signal with suitable rails |
| On-Resistance | 70 Ω typical at 4.5 V span; 40 Ω typical at 9 V span |
| Logic | Direct LSTTL-compatible input thresholds |
| Switching | Bidirectional, break-before-make, common inhibit |
| Temperature | −40°C to +125°C family range |
| Exact Package / Packing | TSSOP (PW), 16 pins; 2000-piece large tape and reel |
Product Overview
CD74HC4051PWR is an HC-speed implementation of the classic 4051 analog multiplexer. It selects one of eight bidirectional analog channels while retaining the familiar 4051 address/inhibit control scheme.
Its analog signal rails can differ from the logic reference, allowing bipolar or wider analog signals than ordinary 5 V logic muxes. The tradeoff is switch resistance in the tens of ohms rather than the few-ohm level of newer TMUX parts.
The PWR order code is the compact leaded TSSOP reel format; it is useful when an established HC4051 schematic must be kept while reducing board area relative to SOIC/PDIP.
For related devices, see HKEQGOO’s Signal Switches, Multiplexers, Decoders category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | CD74HC4051PWR |
| Configuration | 1-channel 8:1 analog mux/demux |
| Control Supply | 4.5 V to 5.5 V operating control range |
| Analog Switch Range | 0 V to 10 V span / up to ±5 V signal with suitable rails |
| On-Resistance | 70 Ω typical at 4.5 V span; 40 Ω typical at 9 V span |
| Logic | Direct LSTTL-compatible input thresholds |
| Switching | Bidirectional, break-before-make, common inhibit |
| Temperature | −40°C to +125°C family range |
| Exact Package / Packing | TSSOP (PW), 16 pins; 2000-piece large tape and reel |
| Manufacturer Status | Active / Production |
| Part Marking | HC4051 family TSSOP marking per TI addendum |
Functional Highlights
HC4051 combines legacy pin/function compatibility with faster CMOS logic
It suits mature 4051 architectures that need HC-family switching speed and TTL-compatible control without redesigning the mux topology.
Switch resistance belongs in the analog error budget
At low source/load impedance, tens of ohms can create gain error and settling effects. High-impedance ADC inputs reduce static loading but still require acquisition-time analysis.
Design Considerations
- Set VCC/VEE so every analog signal stays inside the allowed switch voltage range.
- Include Ron and source impedance in ADC settling/gain calculations.
- Use inhibit/default control states so no channel is unintentionally selected during reset.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists CD74HC4051PWR as Active / Production; TSSOP (PW), 16 pins; 2000-piece large tape and reel; −40°C to +125°C.
Related Engineering Resources
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
Request a Quote
To request a quotation, provide the manufacturer part number, required quantity, destination, target Date Code if applicable, and any testing or inspection requirements.
