CD54/74AC257, CD54/74ACT257,
CD74ACT258
Data sheet acquired from Harris Semiconductor
SCHS248A
Quad 2-Input Multiplexer
with Three-State Outputs
August 1998 - Revised May 2000
Features
Description
• ’AC257, ’ACT257. . . . . . . . . . . . . Non-Inverting Outputs The ’AC257, ’ACT257 and CD74ACT258 are quad 2-input
multiplexers with three-state outputs that utilize Advanced
CMOS Logic technology. Each of these devices selects four
• CD74ACT258 . . . . . . . . . . . . . . . . . . . Inverting Outputs
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 or Y) are in the high-
impedance state regardless of all other input conditions.
• Buffered Inputs
• Typical Propagation Delay
o
- 4.4ns at V
CC
= 5V, T = 25 C, C = 50pF
A L
• Exceeds 2kV ESD Protection MIL-STD-883, Method
3015
Moving data from two groups of registers to four common
output buses is a common use of the ’AC257, ’ACT257, and
CD74ACT258. The state of the Select input determines the
particular register from which the data comes. The ’AC257,
’ACT257 and CD74ACT258 can also be used as function
generators.
• SCR-Latchup-Resistant CMOS Process and Circuit
Design
• Speed of Bipolar FAST™/AS/S with Significantly
Reduced Power Consumption
• Balanced Propagation Delays
Ordering Information
• AC Types Feature 1.5V to 5.5V Operation and
Balanced Noise Immunity at 30% of the Supply
PART
NUMBER
TEMP.
RANGE ( C)
o
PACKAGE
• ±24mA Output Drive Current
CD54AC257F3A
CD74AC257E
-55 to 125
o
16 Ld CERDIP
- Fanout to 15 FAST™ ICs
0 to 70 C, -40 to 85, 16 Ld PDIP
-55 to 125
Drives 50Ω Transmission Lines
o
CD74AC257M
0 to 70 C, -40 to 85, 16 Ld SOIC
-55 to 125
Pinout
CD54ACT257F3A
CD74ACT257E
-55 to 125
o
16 Ld CERDIP
CD54AC257, CD54ACT257
(CERDIP)
0 to 70 C, -40 to 85, 16 Ld PDIP
-55 to 125
CD74AC257, CD74ACT257, CD74ACT258
(PDIP, SOIC)
o
CD74ACT257M
CD74ACT258E
CD74ACT258M
NOTES:
0 to 70 C, -40 to 85, 16 Ld SOIC
-55 to 125
TOP VIEW
o
0 to 70 C, -40 to 85, 16 Ld PDIP
ACT258
S
AC/ACT257
S
AC/ACT257 ACT258
16 V
-55 to 125
1
2
3
4
5
6
7
8
V
CC
15 OE
CC
o
0 to 70 C, -40 to 85, 16 Ld SOIC
1I
1I
1I
1I
OE
0
1
0
1
-55 to 125
14 4I
13 4I
4I
4I
0
1
0
1
1Y
1Y
1. When ordering, use the entire part number. Add the suffix 96 to
obtain the variant in the tape and reel.
2I
0
2I
0
12 4Y
4Y
2I
1
2I
1
11 3I
0
3I
0
2. Wafer and die for this part number is available which meets all
electrical specifications. Please contact your local TI sales office or
customer service for ordering information.
10 3I
1
3I
1
2Y
2Y
9
3Y
3Y
GND
GND
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
FAST™ is a Trademark of Fairchild Semiconductor.
1
Copyright © 2000, Texas Instruments Incorporated