Texas Instruments SN74AS573AN Manual

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SDAS048D − DECEMBER 1989 − REVISED JANUARY 1995

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 125 C. The SN74ALS573C and SN74AS573A are characterized for operation from 0 C to 70 C.

FUNCTION TABLE

(each latch)

INPUTS

OUTPUT

OE LE D

OUTPUT

L H H H

L H L L

L L X Q0

H X X Z

GND

VCC

SN54ALS573C, SN54AS573A . . . J OR W PACKAGE

SN74ALS573C, SN74AS573A . . . DW OR N PACKAGE

(TOP VIEW)

3 2 1 20 19

9 10 11 12 13

SN54ALS573C, SN54AS573A . . . FK PACKAGE

(TOP VIEW)

7Q 1Q

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Produkt Specifikationer

Mærke:	Texas Instruments
Kategori:	Ikke kategoriseret
Model:	SN74AS573AN
Type:	Logisk kredsløb
Bredde:	26.92 mm
Dybde:	6.6 mm
Højde:	4.57 mm
Antal pr. pakke:	20 stk
Pakkedybde:	506 mm
Pakkebredde:	13.97 mm
Pakkehøjde:	11.23 mm
Opbevaringstemperatur (T-T):	-65 - 150 °C
Driftstemperatur (T-T):	0 - 70 °C
Pakketype:	PDIP
Antal stifter:	20
Bredde (med stifter):	26.92 mm
Højde (med stifter):	8.26 mm
Dybde (med stifter):	10.92 mm