1

Data sheet acquired from Harris Semiconductor

SCHS246

Features

• Buffered Inputs

• Typical Propagation Delay

• Exceeds 2kV ESD Protection MIL-STD-883, Method

3015

• SCR-Latchup-Resistant CMOS Process and Circuit

Design

• Speed of Bipolar FAST™/AS/S with Significantly

Reduced Power Consumption

• Balanced Propagation Delays

• AC Types Feature 1.5V to 5.5V Operation and

Balanced Noise Immunity at 30% of the Supply

•

±24mA Output Drive Current

- Fanout to 15 FAST™ ICs

- Drives 50

Ω Transmission Lines

Pinout

CD74AC251, CD74ACT251

(PDIP, SOIC)

TOP VIEW

Description

The CD74AC251 and CD74ACT251 8-input multiplexers that

utilize the Harris Advanced CMOS Logic technology. This

multiplexer features both true (Y) and complement (Y) outputs

as well as an Output Enable (OE) input. The OE must be at a

LOW logic level to enable this device. When the OE input is

HIGH, both outputs are in the high-impedance state. When

enabled, address information on the data select inputs deter-

mines which data input is routed to the Y and Y outputs.

14

15

16

9

13

12

11

10

1

2

3

4

5

7

6

8

Y

Y

GND

OE

S0

S1

S2

Ordering Information

PART

NUMBER

TEMP.

PACKAGE

PKG.

NO.

CD74AC251E

-55 to 125

16 Ld PDIP

E16.3

CD74ACT251E

-55 to 125

16 Ld PDIP

E16.3

CD74AC251M

-55 to 125

16 Ld SOIC

M16.15

CD74ACT251M

-55 to 125

16 Ld SOIC

M16.15

NOTES:

1. When ordering, use the entire part number. Add the suffix 96 to

obtain the variant in the tape and reel.

2. Wafer and die for this part number is available which meets all elec-

trical specifications. Please contact your local sales office or Harris

customer service for ordering information.

August 1998

CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.

FAST™ is a Trademark of Fairchild Semiconductor.

Copyright

CD74AC251,

CD74ACT251

8-Input Multiplexer, Three-State

File Number

1981.1