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 | ||
There is a preview and 74LCX257M download ( pdf file ) link at the bottom of this page. Total 9 Pages |
Preview 1 page No Preview Available ! 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 “X” to the ordering code.
Logic Symbols
Connection Diagram
IEEE/IEC
Pin Descriptions
Pin Names
S
OE
I0a–I0d
I1a–I1d
Za–Zd
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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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 DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for 74LCX257M electronic component. |
Information | Total 9 Pages | |
Link URL | [ Copy URL to Clipboard ] | |
Download | [ 74LCX257M.PDF Datasheet ] |
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