8-1

Data sheet acquired from Harris Semiconductor

SCHS260A

Features

• Buffered Inputs

• SCR Latchup Resistant BiCMOS Process and

Circuit Design

• FCTXXX Types

- Speed of Bipolar FAST™/AS/S

• FCTXXXAT Types

- 30% Faster than FAST™/AS/S with Significantly

Reduced Power Consumption

• 48mA Output Sink Current

• Controlled Output Edge Rates

• BiCMOS Technology with Low Quiescent Power

Description

The CD74FCT573 and CD74FCT573AT octal transparent

latches use a small geometry BiCMOS technology. The out-

put stage is a combination of bipolar and CMOS transistors

that limits the output HIGH level to two diode drops below

reduces power bus ringing (a source of EMI) and minimizes

simultaneous output switching. The output configuration

also enhances switching speed and is capable of sinking

48 milliamperes.

The CD74FCT573 and CD74FCT573AT outputs are trans-

parent to the inputs when the Latch Enable (LE) is HIGH.

When the Latch Enable (LE) goes LOW, the data is latched.

The Output Enable (OE) controls the three-state outputs.

When the Output Enable (OE) is HIGH, the outputs are in

the high impedance state. The latch operation is indepen-

dent of the state of the Output Enable.

Ordering Information

Pinout

PART NUMBER

TEMP.

PACKAGE

PKG.

NO.

CD74FCT573ATE

0 to 70

20 Ld PDIP

E20.3

CD74FCT573M

0 to 70

20 Ld SOIC

M20.3

CD74FCT573SM

0 to 70

20 Ld SSOP

M20.209

NOTE: When ordering the suffix M and SM packages, use the entire

part number. Add the suffix 96 to obtain the variant in the tape and reel.

CD74FCT573, CD74FCT573AT

(PDIP, SOIC, SSOP)

TOP VIEW

11

12

13

14

15

16

17

18

20

19

10

9

8

7

6

5

4

3

2

1

OE

D0

D1

D2

D3

D4

D6

D5

D7

GND

Q1

Q2

Q3

Q4

Q5

Q6

Q7

LE

Q0

January 1997

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

FAST™ is a trademark of Fairchild Semiconductor.

Copyright

CD74FCT573,

CD74FCT573AT

BiCMOS FCT Interface Logic,

Octal Transparent Latches, Three-State

NOT RECOMMENDED

FOR NEW

DESIGNS

Use CMOS

Technology

File Number

2304.2

CD74FCT573AT was not acquired from Harris Semiconductor.