Description

The PI5C3251 is a Dual 8:1 Multiplexer/Demultiplexer with threestate outputs that is pinout compatible with the PI74FCT251T, 74F251, and 74ALS/AS/LS 251. Inputs can be connected to outputs with low on resistance (5Ω) with no additional ground bounce noise or propagation delay.

Feature(s)

Near-Zero propagation delay
5Ω switches connect inputs to outputs
Direct bus connection when switches are ON
Ultra Low Quiescent Power (0.2µA typical)
- Ideally suited for notebook applications
Pin compatible with 74 series 251 logic devices
Packaging (Pb-free & Green):
- 16-pin, 150-mil wide plastic, QSOP (Q)
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/

Specifications & Technical Documents

Product Parameters

Compliance (Only Automotive Supports PPAP)	Standard
Configuration	Mux: 1 8-Channel
Differential Channels	N/A
HotInsertion	1
Lanes	N/A
OtherFeatures	None
Rail-to-Rail	0
Signal Type	Single Ended
Single Ended Channels	8
Type	None
Voltage	5

Technical Documents

Recommended Soldering Techniques

TN1.pdf

Additional Technical Documents are available upon request:
Application information, Evaluation board, and Other technical documents

Request Documents

Purchase & Availability

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Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN #	Issue Date	Implementation Date	Subject
PCN-2770	2025-10-30	2025-10-30	Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products
PCN-2654	2024-02-15	2024-04-28	Device End of Life (EOL)

PI5C3251