Texas Instruments SN74AS573AN Bruksanvisning

Läs gratis den bruksanvisning för Texas Instruments SN74AS573AN (24 sidor) i kategorin Inte kategoriserad. Guiden har ansetts hjälpsam av 27 personer. Har du en fråga om Texas Instruments SN74AS573AN eller vill du ställa frågor till andra användare av produkten? Ställ en fråga







SDAS048D − DECEMBER 1989 − REVISED JANUARY 1995

Copyright  1995, Texas Instruments Incorporated

1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443

•3-State Buer-Type Outputs Drive Bus

Lines Directly

•Bus-Structured Pinout

•True Logic Outputs

•Package Options Include Plastic

Small-Outline (DW) Packages, Ceramic

Chip Carriers (FK), Standard Plastic (N) and

Ceramic (J) 300-mil DIPs, and Ceramic Flat

(W) Packages

description

These octal D-type transparent latches feature

3-state outputs designed specically for driving

highly capacitive or relatively low-impedance

loads. They are particularly suitable for

implementing buffer registers, I/O ports,

bidirectional bus drivers, and working registers.

While the latch-enable (LE) input is high, outputs

(Q) respond to the data (D) inputs. When LE is low,

the outputs are latched to retain the data that was

set up.

A buffered output-enable (OE) input can be used

to place the eight outputs in either a normal logic

state (high or low) or a high-impedance state. In

the high-impedance state, the outputs neither load

nor drive the bus lines signicantly. The

high-impedance state and the increased drive

provide the capability to drive bus lines without

interface or pullup components.

OE does not aect internal operation of the

latches. Old data can be retained or new data can

be entered while the outputs are in the

high-impedance state.

The SN54ALS573C and SN54AS573A are characterized for operation over the full military temperature range

of −55°°° °C to 125C. The SN74ALS573C and SN74AS573A are characterized for operation from 0C to 70C.

FUNCTION TABLE

(each latch)

INPUTS

OUTPUT

OE LED

OUTPUT

Q

LH HH

L H LL

LL XQ0

H XXZ

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

OE

1D

2D

3D

4D

5D

6D

7D

8D

GND

VCC

1Q

2Q

3Q

4Q

5Q

6Q

7Q

8Q

LE

SN54ALS573C, SN54AS573A . . . J OR W PACKAGE

SN74ALS573C, SN74AS573A . . . DW OR N PACKAGE

(TOP VIEW)

32120 19

91011 1213

4

5

6

7

8

18

17

16

15

14

2Q

3Q

4Q

5Q

6Q

3D

4D

5D

6D

7D

SN54ALS573C, SN54AS573A . . . FK PACKAGE

(TOP VIEW)

2D

1D

OE

8Q

7Q 1Q

8D

G

ND

LE

V

CC

   ! "#$ !  %#&'" ($)

(#"! "  !%$""! %$ *$ $!  $+! !#$!

!(( ,-) (#" %"$!!. ($!  $"$!!'- "'#($

$!.  '' %$$!)

Produktspecifikationer