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ST Microelectronics |
M74HC258
QUAD 2 CHANNEL MULTIPLEXER (3-STATE, INVERTING)
s HIGH SPEED :
tPD = 11 ns (TYP.) at VCC = 6V
s LOW POWER DISSIPATION:
ICC =4µA(MAX.) at TA=25°C
s HIGH NOISE IMMUNITY:
VNIH = VNIL = 28 % VCC (MIN.)
s SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 6mA (MIN)
s BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL
s WIDE OPERATING VOLTAGE RANGE:
VCC (OPR) = 2V to 6V
s PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 258
DESCRIPTION
The M74HC258 is an high speed CMOS QUAD 2
CHANNEL MULTIPLEXER (3-STATE) fabricated
with silicon gate C2MOS technology.
This IC is composed of four independent
2-channel multiplexer with common SELECT and
ENABLE INPUT.
The M74HC258 is an inverting multiplexer.
DIP
SOP
TSSOP
ORDER CODES
PACKAGE
TUBE
DIP
SOP
TSSO P
M74HC258B1R
M74HC258M1R
T&R
M74HC258RM13TR
M74HC258TTR
When the ENABLE INPUT (OE) is held ”High”,
outputs of the IC become High-Impedance state. If
SELECT INPUT is held ”LOW”, ”A” data is
selected, when SELECT INPUT is High ”H”, ”B”
data is chosen.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
August 2001
1/11
M74HC258
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
1
2, 5, 14, 11
3, 6, 13, 10
4, 7, 12, 9
15
8
16
SYMBOL
SELECT
1A to 4A
1B to 4B
1Y to 4Y
OE
GND
Vcc
NAME AND FUNCTION
Common Data Select
Input
Data Input From Source A
Data Input From Source B
3 State Multiplexer
Outputs
3 State Output Enable
Inputs (Active Low)
Ground (0V)
Positive Supply Voltage
TRUTH TABLE
OE
H
L
L
L
L
X : Don’t Care
Z : High Impedance
LOGIC DIAGRAM
INPUTS
SELECT
X
L
L
H
H
A
X
L
H
X
X
OUTPUT
BY
XZ
XH
XL
LH
HL
This logic diagram has not be used to estimate propagation delays
2/11
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