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What is 74LCX257M?

This electronic component, produced by the manufacturer "Fairchild Semiconductor", performs the same function as "Low Voltage Quad 2-Input Multiplexer with 5V Tolerant Inputs and Outputs".


74LCX257M Datasheet PDF - Fairchild Semiconductor

Part Number 74LCX257M
Description Low Voltage Quad 2-Input Multiplexer with 5V Tolerant Inputs and Outputs
Manufacturers Fairchild Semiconductor 
Logo Fairchild Semiconductor Logo 


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No Preview Available ! 74LCX257M datasheet, circuit

May 1995
Revised September 2000
74LCX257
Low Voltage Quad 2-Input Multiplexer
with 5V Tolerant Inputs and Outputs
General Description
The LCX257 is a quad 2-input multiplexer with 3-STATE
outputs. Four bits of data from two sources can be selected
using a Common Data Select input. The four outputs
present the selected data in true (non inverted) form. The
outputs may be switched to a high impedance state by
placing a logic HIGH on the common Output Enable (OE)
input, allowing the outputs to interface directly with bus-ori-
ented systems.
The 74LCX257 is fabricated with advanced CMOS technol-
ogy to achieve high speed operation while maintaining
CMOS low power dissipation.
Features
s 5V tolerant inputs and outputs
s 2.3V–3.6V VCC specifications provided
s 6.0 ns tPD max (VCC = 3.3V, In Zn), 10 µA ICC max
s Power down high impedance inputs and outputs
s Supports live insertion/withdrawal (Note 1)
s Implements patented noise/EMI reduction circuitry
s Latch-up performance exceeds 500 mA
s ESD performance:
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 Xto the ordering code.
Logic Symbols
Connection Diagram
IEEE/IEC
Pin Descriptions
Pin Names
S
OE
I0aI0d
I1aI1d
ZaZd
Description
Common Data Select Input
3-STATE Output Enable Input
Data Inputs from Source 0
Data Inputs from Source 1
3-STATE Multiplexer Outputs
© 2000 Fairchild Semiconductor Corporation DS012466
www.fairchildsemi.com

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74LCX257M equivalent
AC LOADING and WAVEFORMS Generic for LCX Family
FIGURE 1. AC Test Circuit (CL includes probe and jig capacitance)
Test
tPLH, tPHL
tPZL, tPLZ
tPZH,tPHZ
Switch
Open
6V at VCC = 3.3 ± 0.3V
VCC x 2 at VCC = 2.5 ± 0.2V
GND
Waveform for Inverting and Non-Inverting Functions
3-STATE Output High Enable and
Disable Times for Logic
Propagation Delay. Pulse Width and trec Waveforms
Setup Time, Hold Time and Recovery Time for Logic
3-STATE Output Low Enable and
Disable Times for Logic
trise and tfall
FIGURE 2. Waveforms
(Input Characteristics; f =1MHz, tR = tF = 3ns)
Symbol
Vmi
Vmo
Vx
Vy
3.3V ± 0.3V
1.5V
1.5V
VOL + 0.3V
VOH 0.3V
VCC
2.7V
1.5V
1.5V
VOL + 0.3V
VOH 0.3V
2.5V ± 0.2V
VCC/2
VCC/2
VOL + 0.15V
VOH 0.15V
5 www.fairchildsemi.com


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Part Details

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Featured Datasheets

Part NumberDescriptionMFRS
74LCX257The function is Low Voltage Quad 2-Input Multiplexer with 5V Tolerant Inputs and Outputs. Fairchild SemiconductorFairchild Semiconductor
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74LCX257MThe function is Low Voltage Quad 2-Input Multiplexer with 5V Tolerant Inputs and Outputs. Fairchild SemiconductorFairchild Semiconductor

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