Fairchild 74LCX257 Low Voltage Quad 2-Input Multiplexer Data Sheet
Summary
This low-voltage quad 2-input multiplexer is essential for engineers requiring reliable signal selection in complex data paths. The device accepts four bits of data from one of two sources, utilizing 5V tolerant inputs and features versatile 3-STATE outputs. Ideal for interfacing with modern bus architectures, it supports live insertion/withdrawal and maintains low power dissipation. This manual provides detailed electrical specifications, functional diagrams, operating conditions, and ordering guides necessary for integrating this robust logic component into your design.
Page 1 Text Content
查询74LCX257供应商
74L 257 L ltag e Q ad 2-In t M ltip lexer w ith 5V To leran t In ts an tp ts
May 1995 Revised September 2000
74LCX257 Low Voltage Quad 2-Input Multiplexer with 5V Tolerant Inputs and Outputs General Description Features The LCX257 is a quad 2-input multiplexer with 3-STATE ■5V tolerant inputs and outputs outputs. Four bits of data from two sources can be selected ■2.3V–3.6V VCC specifications provided using a Common Data Select input. The four outputs
■6.0 ns t PD max (VCC = 3.3V, In → Zn), 10 µA ICC max
present the selected data in true (non inverted) form. The outputs may be switched to a high impedance state by ■Power down high impedance inputs and outputs placing a logic HIGH on the common Output Enable (OE)
■Supports live insertion/withdrawal (Note 1)
input, allowing the outputs to interface directly with bus-ori-
Implements patented noise/EMI reduction circuitry
ented systems.
■Latch-up performance exceeds 500 m A
The 74LCX257 is fabricated with advanced CMOS technol-
■ESD performance:
ogy to achieve high speed operation while maintaining
CMOS low power dissipation. Human body model > 2000V Machine model > 200V Note 1: To ensure the high-impedance state during power up or down, OE should be tied to VCC through a pull-up resistor: the minimum value or the resistor is determined by the current-sourcing capability of the driver.
Ordering Code: Order Number Package Number Package Description 74LCX257M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow 74LCX257SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74LCX257MTC MTC16 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm 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
Pin Descriptions Pin Names Description
Common Data Select Input
OE 3-STATE Output Enable Input I0a–I0d Data Inputs from Source 0
I1a–I1d Data Inputs from Source 1
Za–Zd 3-STATE Multiplexer Outputs
© 2000 Fairchild Semiconductor Corporation DS012466 www.fairchildsemi.com
Page Summary Contents For Fairchild 74LCX257 Low Voltage Quad 2-Input Multiplexer Data Sheet
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 9 |
| File Size | 99.32 KB |
| Published | June 01, 2026 |
Enter the captcha to get the download link:
Frequently Asked Questions
What is the operating voltage range for this multiplexer?
The recommended operating condition supply voltage range is 2.0 V to 3.6 V.
How do I put the outputs into a high impedance state?
Setting the Output Enable (OE) input HIGH will force all four outputs into a high impedance state.
Are the inputs/outputs tolerant of 5V signals?
Yes, the module features 5V tolerant inputs and outputs, allowing compatibility with various logic levels.
Which package types are available for ordering?
It is available in SOIC (M16A), SOP (M16D), and TSSOP (MTC16) packages.