Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLogic ICsLogic IC - Comparator DIP 20 No. of bits 8 A=B 2 V

SN54HC688, SN74HC688

8-BIT IDENTITY COMPARATORS

SCLS010D – DECEMBER 1982 – REVISED AUGUST 2003

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Wide Operating Voltage Range of 2 V to 6 V

High-Current Outputs Drive Up To 10

LSTTL Loads

Low Power Consumption, 80-µA Max I

Typical t

= 14 ns

±4-mA Output Drive at 5 V

Low Input Current of 1 µA Max

Compare Two 8-Bit Words

SN54HC688 ...J OR W PACKAGE

SN74HC688 ...DW, N, OR PW PACKAGE

(TOP VIEW)

SN54HC688 . . . FK PACKAGE

(TOP VIEW)

3212019

91011 1213

GND

P = Q

GND

P = Q

description/ordering information

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.

ORDERING INFORMATION

PACKAGE

†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

–40 C to 85 C

PDIP – N Tube of 20 SN74HC688N SN74HC688N

–40 C to 85 C

SOIC – DW

Tube of 25 SN74HC688DW

HC688

–40

C to 85

SOIC – DW

Reel of 2000 SN74HC688DWR

HC688

TSSOP – PW

Tube of 2000 SN74HC688PWR

HC688

TSSOP – PW

Reel of 250 SN74HC688PWT

HC688

–55 C to 125 C

CDIP – J Tube of 20 SNJ54HC688J SNJ54HC688J

–55

C to 125

CFP – W Tube of 85 SNJ54HC688W SNJ54HC688W

LCCC – FK Tube of 55 SNJ54HC688FK SNJ54HC688FK

†

Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines

are available at www.ti.com/sc/package.

FUNCTION TABLE

INPUTS

OUTPUT

DATA

P, Q

OUTPUT

P = Q

P = Q L L

P > Q XH

P < Q XH

X H H

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.

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.

On products compliant to MIL-PRF-38535, all parameters are tested

unless otherwise noted. On all other products, production

processing does not necessarily include testing of all parameters.

Summary of content (18 pages)

PAGE 1
SN54HC688, SN74HC688 8-BIT IDENTITY COMPARATORS SCLS010D – DECEMBER 1982 – REVISED AUGUST 2003 D D D D D D D Wide Operating Voltage Range of 2 V to 6 V High-Current Outputs Drive Up To 10 LSTTL Loads Low Power Consumption, 80-µA Max ICC Typical tpd = 14 ns ±4-mA Output Drive at 5 V Low Input Current of 1 µA Max Compare Two 8-Bit Words SN54HC688 . . . J OR W PACKAGE SN74HC688 . . .
PAGE 2
SN54HC688, SN74HC688 8-BIT IDENTITY COMPARATORS SCLS010D – DECEMBER 1982 – REVISED AUGUST 2003 logic diagram (positive logic) OE P0 Q0 P1 Q1 P2 Q2 P3 Q3 P4 Q4 P5 Q5 P6 Q6 P7 Q7 1 2 3 4 5 6 7 19 8 P=Q 9 11 12 13 14 15 16 17 18 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.
PAGE 3
SN54HC688, SN74HC688 8-BIT IDENTITY COMPARATORS SCLS010D – DECEMBER 1982 – REVISED AUGUST 2003 recommended operating conditions (see Note 3) SN54HC688 VCC Supply voltage VIH VCC = 2 V VCC = 4.5 V High-level input voltage VCC = 6 V VCC = 2 V VIL Low-level input voltage VI VO MAX 2 5 6 NOM MAX 2 5 6 1.5 3.15 3.15 4.2 4.2 0 UNIT V V 0.5 0.5 1.35 1.35 1.8 1.8 VCC VCC VCC = 2 V VCC = 4.5 V Input transition (rise and fall) time MIN 1.5 0 Output voltage tt NOM VCC = 4.
PAGE 4
SN54HC688, SN74HC688 8-BIT IDENTITY COMPARATORS SCLS010D – DECEMBER 1982 – REVISED AUGUST 2003 switching characteristics over recommended operating free-air temperature range, CL = 50 pF (unless otherwise noted) (see Figure 1) PARAMETER TA = 25°C TYP MAX SN54HC688 SN74HC688 FROM (INPUT) TO (OUTPUT) VCC 2V 113 210 313 265 P or Q P=Q 4.5 V 30 42 63 53 6V 24 36 53 45 2V 66 120 179 151 4.
PAGE 5
SN54HC688, SN74HC688 8-BIT IDENTITY COMPARATORS SCLS010D – DECEMBER 1982 – REVISED AUGUST 2003 PARAMETER MEASUREMENT INFORMATION From Output Under Test Test Point Input VCC 50% 50% 0V CL = 50 pF (see Note A) tPLH In-Phase Output LOAD CIRCUIT 50% 10% tPHL 90% 90% tr Input 50% 10% 90% 90% tr tPHL VCC 50% 10% 0 V Out-of-Phase Output 90% tf VOH 50% 10% VOL tf tPLH 50% 10% tf 50% 10% 90% VOH VOL tr VOLTAGE WAVEFORMS PROPAGATION DELAY AND OUTPUT TRANSITION TIMES VOLTAGE WAVEFORM INPUT
PAGE 6
PACKAGE OPTION ADDENDUM www.ti.
PAGE 7
PACKAGE OPTION ADDENDUM www.ti.
PAGE 8
PACKAGE OPTION ADDENDUM www.ti.
PAGE 9
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant SN74HC688DWR SOIC DW 20 2000 330.0 24.4 10.8 13.0 2.7 12.0 24.0 Q1 SN74HC688PWR TSSOP PW 20 2000 330.0 16.4 6.95 7.1 1.6 8.0 16.0 Q1 SN74HC688PWT TSSOP PW 20 250 330.0 16.4 6.95 7.1 1.6 8.0 16.
PAGE 10
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74HC688DWR SOIC DW 20 2000 367.0 367.0 45.0 SN74HC688PWR TSSOP PW 20 2000 367.0 367.0 38.0 SN74HC688PWT TSSOP PW 20 250 367.0 367.0 38.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.