Texas Instruments SN74ALS688DW Manual de Usario

Texas Instruments No categorizado SN74ALS688DW

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SN54ALS688, SN74ALS688

8-BIT IDENTITY COMPARATORS

SDAS228A – JUNE 1982 – REVISED JANUARY 1995

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

•Compare Two 8-Bit Words

•Totem-Pole Outputs (P = Q)

•′ALS688 Are Identical to ALS521′

•Package Options Include Plastic

Small-Outline (DW) Packages, Ceramic

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

and Ceramic (J) 300-mil DIPs

description

These identity comparators perform comparisons

on two 8-bit binary or BCD words and provide

P = Q outputs. These devices have totem-pole

outputs.

The SN54ALS688 is characterized for operation

over the full military temperature range of –55 C°

to 125°C. The SN74ALS688 is characterized for

operation from 0°C to 70 C.°

FUNCTION TABLE

INPUTS

OUTPUT

DATA

P, Q

ENABLE

OUTPUT

P = Q

P = Q L L

P > Q L H

P < Q L H

X H H

GND

VCC

P = Q

SN54ALS688 . . . J PACKAGE

SN74ALS688 ...DW OR N PACKAGE

(TOP VIEW)

3 2 1 20 19

9 10 11 12 13

SN54ALS688 . . . FK PACKAGE

(TOP VIEW)

P5 P = Q

GND

P4 V

PRODUCTION DATA information is current as of publication date.

Products conform to specications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

SN54ALS688, SN74ALS688

8-BIT IDENTITY COMPARATORS

SDAS228A – JUNE 1982 – REVISED JANUARY 1995

2POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

logic symbol†

COMP

P1 6

P2 8

P3 11

P5 15

Q1 7

Q2 9

Q3 12

Q5 16

1P=Q

P = Q

†This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.

SN54ALS688, SN74ALS688

8-BIT IDENTITY COMPARATORS

SDAS228A – JUNE 1982 – REVISED JANUARY 1995

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

logic diagram (positive logic)

P = Q

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

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

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

Operating free-air temperature range, TA: SN54ALS688 –55°C to 125 C°. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SN74ALS688 0°C to 70 C°. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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