CD54AC257/3A
CD54ACT257/3A
S E M I C O N D U C T O R
COMPLETE DATA SHEET
COMING SOON!
Quad 2-Input Multiplexer
Three-State, Non-Inverting
June 1997
Description
Functional Diagram
2
The CD54AC257/3A and CD54ACT257/3A are quad 2-input
multiplexers with three-state outputs. These devices utilize
the Harris Advanced CMOS Logic technology. Each of these
devices selects four bits of data from two sources under the
control of a common Select input (S). The Output Enable
(OE) is active LOW. When OE is HIGH, all of the outputs (Y)
are in the high-impedance state regardless of all other input
conditions.
1I0
4
1Y
5
2I0
11
3I0
7
2Y
14
4I0
3
1I1
9
3Y
6
Moving data from two groups of registers to four common
output buses is a common use of the CD54AC/ACT257/3A.
The state of the Select input determines the particular regis-
ter from which the data comes. The CD54AC/ACT257/3A
can also be used as function generators.
2I1
10
3I1
12
4Y
13
4I1
1
15
The CD54AC257/3A and CD54ACT257/3A are supplied in
16 lead dual-in-line ceramic packages (F suffix).
S
OE
ACT INPUT LOAD TABLE
INPUT
Data
S
UNIT LOAD (NOTE 1)
0.83
1.27
1.27
OE
NOTE:
1. Unit load is ∆I limit specified in DC Electrical Specifications
CC
o
Table, e.g., 2.4mA Max at +25 C.
Absolute Maximum Ratings
DC Supply Voltage, V . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +6V
Power Dissipation Per Package, P
D
CC
o
o
DC Input Diode Current, I
T = -55 C to +100 C (Package F) . . . . . . . . . . . . . . . . . . 500mW
IK
A
o
o
For V < -0.5V or V > V + 0.5V . . . . . . . . . . . . . . . . . . . . . .±20mA
T = +100 C to +125 C (Package F) . . . . . . . . Derate Linearly at
I
I
CC
A
o
DC Output Diode Current, I
8mW/ C to 300mW
OK
For V < -0.5V or V > V + 0.5V. . . . . . . . . . . . . . . . . . . . .±50mA Operating Temperature Range, T
O
O
CC
A
o
o
DC Output Source or Sink Current, Per Output Pin, I
Package Type F. . . . . . . . . . . . . . . . . . . . . . . . . .-55 C to +125 C
O
o
o
For V > -0.5V or V < V + 0.5V. . . . . . . . . . . . . . . . . . . . .±50mA
Storage Temperature, T
. . . . . . . . . . . . . . . . . .-65 C to +150 C
O
O
CC
STG
DC V or GND Current, I or I
Lead Temperature (During Soldering)
CC
CC
GND
For Up to 4 Outputs Per Device, Add ±25mA For Each
Additional Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±100mA
At Distance 1/16in. ± 1/32in. (1.59mm ± 0.79mm)
From Case For 10s Max . . . . . . . . . . . . . . . . . . . . . . . . . . +265 C
Unit Inserted Into a PC Board (Min Thickness 1/16in., 1.59mm)
o
o
With Solder Contacting Lead Tips Only. . . . . . . . . . . . . . . +300 C
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
Recommended Operating Conditions
o
o
Supply Voltage Range, V
Operating Temperature, T . . . . . . . . . . . . . . . . . . .-55 C to +125 C
CC
A
Unless Otherwise Specified, All Voltages Referenced to GND
Input Rise and Fall Slew Rate, dt/dv
T = Full Package Temperature Range
CD54AC Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.5V to 5.5V
CD54ACT Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.5V to 5.5V
at 1.5V to 3V (AC Types) . . . . . . . . . . . . . . . . . . . 0ns/V to 50ns/V
at 3.6V to 5.5V (AC Types) . . . . . . . . . . . . . . . . . 0ns/V to 20ns/V
at 4.5V to 5.5V (AC Types) . . . . . . . . . . . . . . . . . 0ns/V to 10ns/V
A
DC Input or Output Voltage, V , V . . . . . . . . . . . . . . . . . . 0V to V
CC
I
O
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper I.C. Handling Procedures.
File Number 3903
Copyright © Harris Corporation 1994
1
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