Fairchild 74F253 Dual 4-Input Multiplexer with 3-STATE Outputs Data Handbook
Summary
This robust dual 4-input multiplexer is designed for complex digital switching applications, selecting two bits of data from four unique sources. Its critical feature is the inclusion of 3-STATE outputs, allowing direct interface with bus systems by placing lines into high impedance (Hi-Z) states. The accompanying manual provides comprehensive technical documentation covering detailed electrical characteristics, timing limits, functional truth tables, and various package options (SOIC, SOP, PDIP). It is an essential reference tool for electronics engineers and hardware designers building robust digital logic circuits.
Page 1 Text Content
74F 253 D al 4-In t M ltip lexer w ith 3-S TA tp ts
April 1988 Revised September 2000
74F253 Dual 4-Input Multiplexer with 3-STATE Outputs General Description Features The 74F253 is a dual 4-input multiplexer with 3-STATE out- ■Multifunction capability puts. It can select two bits of data from four sources using
■Non-inverting 3-STATE outputs
common select inputs. The output may be individually switched to a high impedance state with a HIGH on the respective Output Enable (OE) inputs, allowing the outputs to interface directly with bus oriented systems.
Ordering Code: Order Number Package Number Package Description 74F253SC M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow 74F253SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74F253PC N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbols Connection Diagram
IEEE/IEC
© 2000 Fairchild Semiconductor Corporation DS009505 www.fairchildsemi.com
Page Summary Contents For Fairchild 74F253 Dual 4-Input Multiplexer with 3-STATE Outputs Data Handbook
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 7 |
| File Size | 78.58 KB |
| Published | May 20, 2026 |
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Frequently Asked Questions
What is the primary function of the 74F253?
It is a dual 4-input multiplexer with 3-STATE outputs, selecting two bits from four data sources.
How can I keep the outputs isolated or unassigned in a bus system?
Use the Output Enable (OE) inputs; when HIGH, they force the outputs to a high impedance (High Z) state.
What are the available physical packages for this device?
The 74F253 is available in SOIC (M16A), SOP (M16D), and PDIP (N16E) formats.
Are there any limitations if I tie the outputs of multiple devices together?
If tied, all but one device must be in the high impedance state to prevent excessive current drawing on the select inputs.