5962-8681801RA [TI]

8 位标识比较器 | J | 20 | -55 to 125;


型号：	5962-8681801RA
厂家：	TEXAS INSTRUMENTS
描述：	8 位标识比较器 \| J \| 20 \| -55 to 125 运算电路逻辑集成电路比较器
文件：	总6页 (文件大小：92K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SN54HC688, SN74HC688

8-BIT IDENTITY COMPARATORS

SCLS010B – DECEMBER 1982 – REVISED MAY 1997

SN54HC688 . . . J OR W PACKAGE

SN74HC688 . . . DW OR N PACKAGE

(TOP VIEW)

Compare Two 8-Bit Words

Package Options Include Plastic

Small-Outline (DW) and Ceramic Flat (W)

Packages, Ceramic Chip Carriers (FK), and

Standard Plastic (N) and Ceramic (J)

300-mil DIPs

P = Q

17 P7

16 Q6

15 P6

14 Q5

13 P5

12 Q4

11 P4

description

These identity comparators perform comparisons

of two 8-bit binary or BCD words. An

output-enable (OE) input may be used to force the

output to the high level.

GND 10

The SN54HC688 is characterized for operation

over the full military temperature range of –55°C

to 125°C. The SN74HC688 is characterized for

operation from –40°C to 85°C.

SN54HC688 . . . FK PACKAGE

(TOP VIEW)

FUNCTION TABLE

INPUTS

OUTPUT

DATA

20 19

P = Q

P, Q

P = Q

P > Q

P < Q

15 P6

9 10 11 12 13

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

SN54HC688, SN74HC688

8-BIT IDENTITY COMPARATORS

SCLS010B – DECEMBER 1982 – REVISED MAY 1997

†

logic symbol

COMP

P = Q

†

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

logic diagram (positive logic)

P = Q

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

SN54HC688, SN74HC688

8-BIT IDENTITY COMPARATORS

SCLS010B – DECEMBER 1982 – REVISED MAY 1997

†

absolute maximum ratings over operating free-air temperature range

Supply voltage range, V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V

Input clamp current, I (V < 0 or V > V ) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA

Output clamp current, I

(V < 0 or V > V ) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA

O O CC

Continuous output current, I (V = 0 to V ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25 mA

Continuous current through V

Package thermal impedance, θ (see Note 2): DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W

or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA

N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67°C/W

Storage temperature range, T

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C

stg

†

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.

NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace

length of zero.

recommended operating conditions

SN54HC688

MIN NOM

SN74HC688

MIN NOM

UNIT

MAX

Supply voltage

1.5

3.15

4.2

1.5

3.15

4.2

= 2 V

High-level input voltage

= 4.5 V

= 6 V

= 2 V

0.5

1.35

1.8

0.5

1.35

1.8

Low-level input voltage

= 4.5 V

= 6 V

Input voltage

Output voltage

= 2 V

1000

500

400

125

1000

500

400

Input transition (rise and fall) time

Operating free-air temperature

= 4.5 V

= 6 V

–55

–40

°C

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

SN54HC688, SN74HC688

8-BIT IDENTITY COMPARATORS

SCLS010B – DECEMBER 1982 – REVISED MAY 1997

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

otherwise noted)

= 25°C

SN54HC688

SN74HC688

PARAMETER

TEST CONDITIONS

UNIT

MIN

TYP

MAX

MIN

1.9

4.4

5.9

3.7

5.2

MAX

MIN

1.9

MAX

2 V

4.5 V

6 V

1.9 1.998

4.4 4.499

5.9 5.999

= –20 µA

4.4

V = V or V

5.9

= –4 mA

4.5 V

6 V

3.98

5.48

4.3

5.8

3.84

5.34

= –5.2 mA

2 V

0.002

0.001

0.17

0.1

= 20 µA

4.5 V

6 V

V = V or V

0.1

= 4 mA

4.5 V

6 V

0.26

±100

0.4

0.33

±1000

= 5.2 mA

0.15

0.4

V = V

or 0

6 V

±0.1

±1000

160

µA

V = V

or 0,

= 0

6 V

2 V to 6 V

switching characteristics over recommended operating free-air temperature range, C = 50 pF

(unless otherwise noted) (see Figure 1)

= 25°C

TYP

113

SN54HC688

SN74HC688

FROM

(INPUT)

(OUTPUT)

PARAMETER

UNIT

MIN

MAX

210

MIN

MAX

313

MIN

MAX

265

2 V

4.5 V

6 V

P or Q

P = Q

Any

2 V

120

179

151

4.5 V

6 V

2 V

110

4.5 V

6 V

operating characteristics, T = 25°C

PARAMETER

TEST CONDITIONS

TYP

UNIT

Power dissipation capacitance

No load

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

SN54HC688, SN74HC688

8-BIT IDENTITY COMPARATORS

SCLS010B – DECEMBER 1982 – REVISED MAY 1997

PARAMETER MEASUREMENT INFORMATION

From Output

Under Test

Test

Point

Input

50%

0 V

= 50 pF

PLH

PHL

90%

(see Note A)

In-Phase

Output

90%

50%

10%

50%

10%

LOAD CIRCUIT

PLH

PHL

90%

Input

50%

10%

50%

10%

90%

Out-of-Phase

Output

50%

10%

50%

10%

0 V

VOLTAGE WAVEFORM

INPUT RISE AND FALL TIMES

VOLTAGE WAVEFORMS

PROPAGATION DELAY AND OUTPUT TRANSITION TIMES

NOTES: A.

B. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following

characteristics: PRR ≤ 1 MHz, Z = 50 Ω, t = 6 ns, t = 6 ns.

C includes probe and test-fixture capacitance.

C. The outputs are measured one at a time with one input transition per measurement.

D. and t are the same as t

PLH

PHL

Figure 1. Load Circuit and Voltage Waveforms

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

IMPORTANT NOTICE

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any product or service without notice, and advise customers to obtain the latest version of relevant information

to verify, before placing orders, that information being relied on is current and complete. All products are sold

subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those

pertaining to warranty, patent infringement, and limitation of liability.

TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in

accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent

TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily

performed, except those mandated by government requirements.

CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF

DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL

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