Texas Instruments SN74AS573AN Handleiding

Texas Instruments Niet gecategoriseerd SN74AS573AN

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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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SDAS048D − DECEMBER 1989 − REVISED JANUARY 1995

2POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251−1443

logic symbol†logic diagram (positive logic)

1D 3

2D 4

4D 6

7D 9

To Seven Other Channels

†This symbol is in accordance with ANSI/IEEE Std 91-1984 and

IEC Publication 617-12.

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡

Supply voltage, VCC 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage, VI 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Voltage applied to a disabled 3-state output 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range, TA: SN54ALS573C −55° °C to 125 C. . . . . . . . . . . . . . . . . . . . . . . . . . . .

SN74ALS573C 0° °C to 70 C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range −65° °C to 150 C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

‡Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

recommended operating conditions

SN54ALS573C SN74ALS573C

UNIT

MIN NOM MAX MIN NOM MAX

UNIT

VCC Supply voltage 4.5 5 5.5 4.5 5 5.5 V

VIH High-level input voltage 2 2 V

VIL Low-level input voltage 0.7 0.8 V

IOH High-level output current −1 −2.6 mA

IOL Low-level output current 12 24 mA

twPulse duration, LE high 25 10 ns

tsu Setup time, data before LE↓10 10 ns

thHold time, data after LE↓7 7 ns

TAOperating free-air temperature −55 125 0 70 C°

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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

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

SN54ALS573C SN74ALS573C

UNIT

PARAMETER

TEST CONDITIONS

MIN TYP†MAX MIN TYP†MAX

UNIT

VIK VCC = 4.5 V, II = −18 mA −1.2 −1.2 V

VCC = 4.5 V to 5.5 V, IOH = −0.4 mA VCC −2 VCC − 2

V 4 5 V

IOH = −1 mA 2.4 3.3 V

VOH

VCC = 4.5 V IOH = −2.6 mA 2.4 3.2

V 4 5 V

IOL = 12 mA 0.25 0.4 0.25 0.4

VOL VCC = 4.5 V IOL = 24 mA 0.35 0.5 V

IOZH VCC = 5.5 V, V

O = 2.7 V 20 20 Aµ

IOZL VCC = 5.5 V, V

O = 0.4 V −20 −20 µA

IIVCC = 5.5 V, V

I = 7 V 0.1 0.1 mA

IIH VCC = 5.5 V, V

I = 2.7 V 20 20 Aµ

IIL VCC = 5.5 V, V

I = 0.4 V −0.13 −0.1 mA

IO‡VCC = 5.5 V, V

O = 2.25 V −20 −112 −30 −112 mA

Outputs high 10 17 10 17

= 5.5 V Outputs low 15 24 15 24 mA

Outputs disabled 16 27 16 27

†All typical values are at V

CC = 5 V, T

A = 25°C.

‡The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I

OS.

switching characteristics (see Figure 1)

PARAMETER FROM

(INPUT)

(OUTPUT)

VCC = 4.5 V to 5.5 V,

CL = 50 pF,

R1 = 500 Ω,

R2 = 500 Ω,

TA = MIN to MAX§UNIT

SN54ALS573C SN74ALS573C

MIN MAX MIN MAX

tPLH

2 20 2 14

tPHL

D Q 2 17 2 14 ns

tPLH

8 33 6 20

tPHL LE Q 8 24 6 19 ns

tPZH

4 28 3 18

tPZL OE Q 4 21 4 18 ns

tPHZ

2 20 1 10

tPLZ

3 26 1 15

§For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.

Product specificaties

Merk:	Texas Instruments
Categorie:	Niet gecategoriseerd
Model:	SN74AS573AN
Breedte:	26.92 mm
Diepte:	6.6 mm
Hoogte:	4.57 mm
Breedte verpakking:	13.97 mm
Diepte verpakking:	506 mm
Hoogte verpakking:	11.23 mm
Soort:	Logic IC
Type verpakking:	PDIP
Aantal per verpakking:	20 stuk(s)
Temperatuur bij opslag:	-65 - 150 °C
Bedrijfstemperatuur (T-T):	0 - 70 °C
Aantal pinnen:	20
Breedte (met pennen):	26.92 mm
Diepte (met pennen):	10.92 mm
Hoogte (met pennen):	8.26 mm