TECHNICAL DATA
371
Quad 2-Input Data Selector/Multiplexer
with 3-State Outputs
High-Speed Silicon-Gate CMOS
The IN74ACT258 is identical in pinout to the LS/ALS258,
HC/HCT258. The IN74ACT258 may be used as a level converter for
interfacing TTL or NMOS outputs to High Speed CMOS inputs.
This device selects a (4-bit) nibble from either the A or B inputs as
determined by the Select input. The nibble is presented at the outputs
in inverted from when the Output Enable pin is at a low level. A high
level on the Output Enable pin switches the outputs into the high-
impedance state.
·
TTL/NMOS Compatible Input Levels
·
Outputs Directly Interface to CMOS, NMOS, and TTL
·
Operating Voltage Range: 4.5 to 5.5 V
·
Low Input Current: 1.0
µ
A; 0.1
µ
A @ 25
°
C
·
Outputs Source/Sink 24 mA
IN74ACT258
ORDERING INFORMATION
IN74ACT258N Plastic
IN74ACT258D SOIC
T
A
= -40
°
to 85
°
C for all
packages
FUNCTION TABLE
Inputs
Outputs
Output
Enable
Select
Y0-Y3
H
X
Z
L
L
A0-A3
L
H
B0-B3
X=don't care
Z = high-impedance state
A0-A3,B0-B3=the levels of the respective
Nibble Inputs
LOGIC DIAGRAM
PIN 16 =V
CC
PIN 8 = GND
PIN ASSIGNMENT
IN74ACT258
372
MAXIMUM RATINGS
*
Symbol
Parameter
Value
Unit
V
CC
DC Supply Voltage (Referenced to GND)
-0.5 to +7.0
V
V
IN
DC Input Voltage (Referenced to GND)
-0.5 to V
CC
+0.5
V
V
OUT
DC Output Voltage (Referenced to GND)
-0.5 to V
CC
+0.5
V
I
IN
DC Input Current, per Pin
±
20
mA
I
OUT
DC Output Sink/Source Current, per Pin
±
50
mA
I
CC
DC Supply Current, V
CC
and GND Pins
±
50
mA
P
D
Power Dissipation in Still Air, Plastic DIP+
SOIC Package+
750
500
mW
Tstg
Storage Temperature
-65 to +150
°
C
T
L
Lead Temperature, 1 mm from Case for 10 Seconds
(Plastic DIP or SOIC Package)
260
°
C
*
Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.
+Derating - Plastic DIP: - 10 mW/
°
C from 65
°
to 125
°
C
SOIC Package: : - 7 mW/
°
C from 65
°
to 125
°
C
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min
Max
Unit
V
CC
DC Supply Voltage (Referenced to GND)
4.5
5.5
V
V
IN
, V
OUT
DC Input Voltage, Output Voltage (Referenced to GND)
0
V
CC
V
T
J
Junction Temperature (PDIP)
140
°
C
T
A
Operating Temperature, All Package Types
-40
+85
°
C
I
OH
Output Current - High
-24
mA
I
OL
Output Current - Low
24
mA
t
r
, t
f
Input Rise and Fall Time
*
(except Schmitt Inputs)
V
CC
=4.5 V
V
CC
=5.5 V
0
0
10
8.0
ns/V
*
V
IN
from 0.8 V to 2.0 V
This device contains protection circuitry to guard against damage due to high static voltages or electric
fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated
voltages to this high-impedance circuit. For proper operation, V
IN
and V
OUT
should be constrained to the range
GND
(V
IN
or V
OUT
)
V
CC
.
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or V
CC
).
Unused outputs must be left open.
IN74ACT258
373
DC ELECTRICAL CHARACTERISTICS
(Voltages Referenced to GND)
V
CC
Guaranteed Limits
Symbol
Parameter
Test Conditions
V
25
°
C
-40
°
C to
85
°
C
Unit
V
IH
Minimum High-Level
Input Voltage
V
OUT
=0.1 V or V
CC
-0.1 V
4.5
5.5
2.0
2.0
2.0
2.0
V
V
IL
Maximum Low -
Level Input Voltage
V
OUT
=0.1 V or V
CC
-0.1 V
4.5
5.5
0.8
0.8
0.8
0.8
V
V
OH
Minimum High-Level
Output Voltage
I
OUT
-50
µ
A
4.5
5.5
4.4
5.4
4.4
5.4
V
*
V
IN
=V
IH
or V
IL
I
OH
=-24 mA
I
OH
=-24 mA
4.5
5.5
3.86
4.86
3.76
4.76
V
OL
Maximum Low-Level
Output Voltage
I
OUT
50
µ
A
4.5
5.5
0.1
0.1
0.1
0.1
V
*
V
IN
=V
IH
or V
IL
I
OL
=24 mA
I
OL
=24 mA
4.5
5.5
0.36
0.36
0.44
0.44
I
IN
Maximum Input
Leakage Current
V
IN
=V
CC
or GND
5.5
±
0.1
±
1.0
µ
A
I
CCT
Additional Max.
I
CC
/Input
V
IN
=V
CC
- 2.1 V
5.5
1.5
mA
I
OZ
Maximum Three-
State Leakage
Current
V
IN
(OE)= V
IH
or V
IL
V
IN
=V
CC
or GND
V
OUT
=V
CC
or GND
5.5
±
0.5
±
5.0
µ
A
I
OLD
+Minimum Dynamic
Output Current
V
OLD
=1.65 V Max
5.5
75
mA
I
OHD
+Minimum Dynamic
Output Current
V
OHD
=3.85 V Min
5.5
-75
mA
I
CC
Maximum Quiescent
Supply Current
(per Package)
V
IN
=V
CC
or GND
5.5
8.0
80
µ
A
*
All outputs loaded; thresholds on input associated with output under test.
+Maximum test duration 2.0 ms, one output loaded at a time.
IN74ACT258
374
AC ELECTRICAL CHARACTERISTICS
(V
CC
=5.0 V
±
10%, C
L
=50pF, Input t
r
=t
f
=3.0 ns)
Guaranteed Limits
Symbol
Parameter
25
°
C
-40
°
C to 85
°
C
Unit
Min
Max
Min
Max
t
PLH
Propagation Delay, Nibble A or B to Output Y
(Figure 1)
2.0
8.5
1.5
9.5
ns
t
PHL
Propagation Delay, Nibble A or B to Output Y
(Figure 1)
2.0
7.5
1.5
8.0
ns
t
PLH
Propagation Delay, Select to Output Y
(Figure 2)
3.0
10.5
2.0
11.5
ns
t
PHL
Propagation Delay, Select to Output Y
(Figure 2)
1.5
9.5
1.5
11.0
ns
t
PZH
Propagation Delay, Output Enable to Output Y
(Figure 3)
2.0
8.5
1.5
9.5
ns
t
PZL
Propagation Delay, Output Enable to Output Y
(Figure 3)
2.0
8.5
1.5
9.5
ns
t
PHZ
Propagation Delay, Output Enable to Output Y
(Figure 3)
1.5
9.0
1.0
10.0
ns
t
PLZ
Propagation Delay, Output Enable to Output Y
(Figure 3)
2.0
8.0
1.5
9.0
ns
C
IN
Maximum Input Capacitance
4.5
4.5
pF
Typical @25
°
C,V
CC
=5.0 V
C
PD
Power Dissipation Capacitance
55
pF
Figure 1. Switching Waveforms
Figure 2. Switching Waveforms
IN74ACT258
375
Figure 3. Switching Waveforms
EXPANDED LOGIC DIAGRAM
PDF 
ZIP