DataSheet39.com

What is 74HC257?

This electronic component, produced by the manufacturer "Hitachi", performs the same function as "Quad. 2-to-1-line Data Selectors/Multiplexers(with noninverted 3-state outputs)".


74HC257 Datasheet PDF - Hitachi

Part Number 74HC257
Description Quad. 2-to-1-line Data Selectors/Multiplexers(with noninverted 3-state outputs)
Manufacturers Hitachi 
Logo Hitachi Logo 


There is a preview and 74HC257 download ( pdf file ) link at the bottom of this page.





Total 9 Pages



Preview 1 page

No Preview Available ! 74HC257 datasheet, circuit

HD74HC257
Quad. 2-to-1-line Data Selectors/Multiplexers
(with noninverted 3-state outputs)
Description
The large output drive capability coupled with the 3-state feature make this device ideal for interfacing with
bus lines in a bus organized system. When the output control input line is taken high, the outputs of all four
multiplexers are sent into a high impedance state. When the output control line is low, the select input
chooses whether the A or B input is used.
Features
High Speed Operation: tpd (Data to Y) = 10.5 ns typ (CL = 50 pF)
High Output Current: Fanout of 15 LSTTL Loads
Wide Operating Voltage: VCC = 2 to 6 V
Low Input Current: 1 µA max
Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
Function Table
Inputs
Output Control Select
A
LL
L
LL
H
LH
X
LH
X
HX
X
Notes H: high level, L: low level, X: irrelevant
B
X
X
L
H
X
Outputs
Y
L
H
L
H
High impedance

line_dark_gray
74HC257 equivalent
HD74HC257
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = 25°C
Ta = –40 to
+85°C
Item
Symbol
Propagation delay tPHL
time
VCC (V)
2.0
4.5
Min Typ Max Min
— — 115 —
— 11 23 —
Max Unit
145 ns
29
6.0 — — 20 — 25
tPLH 2.0 — — 115 — 145 ns
4.5 — 10 23 — 29
6.0 — — 20 — 25
tPHL 2.0 — — 115 — 145 ns
4.5 — 14 23 — 29
6.0 — — 20 — 25
tPLH 2.0 — — 115 — 145 ns
4.5 — 14 23 — 29
6.0 — — 20 — 25
Output enable
time
t ZL
2.0 — — 150 — 190 ns
4.5 — 11 30 — 38
6.0 — — 26 — 33
tZH 2.0 — — 150 — 190 ns
4.5 — 13 30 — 38
6.0 — — 26 — 33
Output disable
time
t LZ
2.0 — — 150 — 190 ns
4.5 — 14 30 — 38
6.0 — — 26 — 33
tHZ 2.0 — — 150 — 190 ns
4.5 — 18 30 — 38
6.0 — — 26 — 33
Output rise/fall
time
t TLH
t THL
2.0 — — 60 — 75 ns
4.5 — 4 12 — 15
6.0 — — 10 — 13
Input capacitance Cin — — 5 10 — 10 pF
Test Conditions
Data to Y
Select to Y
Output control to Y
Output control to Y
5


line_dark_gray

Preview 5 Page


Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for 74HC257 electronic component.


Information Total 9 Pages
Link URL [ Copy URL to Clipboard ]
Product Image
and Detail view

74HC257 datasheet


1. 2-input Multiplexer ( PDF )

[ Learn More ]




Download [ 74HC257.PDF Datasheet ]

Share Link :

Electronic Components Distributor


An electronic components distributor is a company that sources, stocks, and sells electronic components to manufacturers, engineers, and hobbyists.


SparkFun Electronics Allied Electronics DigiKey Electronics Arrow Electronics
Mouser Electronics Adafruit Newark Chip One Stop


Featured Datasheets

Part NumberDescriptionMFRS
74HC251The function is 8-input multiplexer 3-state. PhilipsPhilips
74HC253The function is Dual 4-input multiplexer 3-state. PhilipsPhilips
74HC257The function is Quad 2-Input Data Selector/Multiplexer with 3-State Outputs. Motorola SemiconductorsMotorola Semiconductors

Semiconductors commonly used in industry:

1N4148   |   BAW56   |   1N5400   |   NE555   |  

LM324   |   BC327   |   IRF840  |   2N3904   |  



Quick jump to:

74HC     1N4     2N2     2SA     2SC     74H     BC     HCF     IRF     KA    

LA     LM     MC     NE     ST     STK     TDA     TL     UA    



Privacy Policy   |    Contact Us     |    New    |    Search