Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLogic ICsLogic IC - Comparator SOIC 20 No. of bits 8 A=B 4.5 V

Data sheet acquired from Harris Semiconductor

SCHS196C

Features

• Cascadable

• Fanout (Over Temperature Range)

- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads

- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads

• Wide Operating Temperature Range . . . -55

C to 125

• Balanced Propagation Delay and Transition Times

• Signiﬁcant Power Reduction Compared to LSTTL

Logic ICs

• HC Types

- 2V to 6V Operation

- High Noise Immunity: N

= 30%, N

= 30%of V

= 5V

• HCT Types

- 4.5V to 5.5V Operation

- Direct LSTTL Input Logic Compatibility,

= 0.8V (Max), V

= 2V (Min)

- CMOS Input Compatibility, I

≤ 1μA at V

, V

Description

The ’HC688 and ’HCT688 are 8-bit magnitude comparators

designed for use in computer and logic applications that

require the comparison of two 8-bit binary words. When the

compared words are equal the output (Y) is low and can be

used as the enabling input for the next device in a cascaded

application.

Pinout

CD54HC688, CD54HCT688 (CERDIP)

CD74HC688 (PDIP, SOIC, SOP, TSSOP)

CD74HCT688 (PDIP, SOIC)

TOP VIEW

Ordering Information

PART NUMBER TEMP. RANGE (

C) PACKAGE

CD54HC688F3A -55 to 125 20 Ld CERDIP

CD54HCT688F3A -55 to 125 20 Ld CERDIP

CD74HC688E -55 to 125 20 Ld PDIP

CD74HC688M -55 to 125 20 Ld SOIC

CD74HC688M96 -55 to 125 20 Ld SOIC

CD74HC688NSR -55 to 125 20 Ld SOP

CD74HC688PWR -55 to 125 20 Ld TSSOP

CD74HC688PWT -55 to 125 20 Ld TSSOP

CD74HCT688E -55 to 125 20 Ld PDIP

CD74HCT688M -55 to 125 20 Ld SOIC

CD74HCT688M96 -55 to 125 20 Ld SOIC

NOTE: When ordering, use the entire part number. The sufﬁxes 96

and R denote tape and reel. The sufﬁx T denotes a small-quantity

reel of 250.

GND

September 1997 - Revised August 2003

CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.

CD54HC688, CD74HC688,

CD54HCT688, CD74HCT688

High-Speed CMOS Logic

8-Bit Magnitude Comparator

[

/Title

(

CD74

C688

D74

CT68

)

Sub-

ect

(

High

peed

MOS

Summary of content (19 pages)

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[ /Title (CD74 HC688 , CD74 HCT68 8) /Subject (High Speed CMOS CD54HC688, CD74HC688, CD54HCT688, CD74HCT688 Data sheet acquired from Harris Semiconductor SCHS196C High-Speed CMOS Logic 8-Bit Magnitude Comparator September 1997 - Revised August 2003 Features Description • Cascadable The ’HC688 and ’HCT688 are 8-bit magnitude comparators designed for use in computer and logic applications that require the comparison of two 8-bit binary words.
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CD54HC688, CD74HC688, CD54HCT688, CD74HCT688 Functional Diagram A0 A1 A2 A3 A4 A5 A6 A7 B0 B1 B2 B3 B4 B5 B6 B7 2 4 6 8 11 13 15 17 3 19 Y 5 7 9 12 14 16 18 1 E TRUTH TABLE INPUTS OUPUTS A, B E Y A=B L L A≠B L H X H H H = High Voltage Level, L = Low Voltage Level, X = Don’t Care 2
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CD54HC688, CD74HC688, CD54HCT688, CD74HCT688 Logic Diagram A0 B0 A1 B1 A2 B2 A3 B3 A4 B4 A5 B5 A6 B6 A7 B7 2 3 4 5 6 7 8 9 11 12 13 14 15 16 17 18 E 1 10 GND 20 VCC 19 Y 3
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CD54HC688, CD74HC688, CD54HCT688, CD74HCT688 Absolute Maximum Ratings Thermal Information DC Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to 7V DC Input Diode Current, IIK For VI < -0.5V or VI > VCC + 0.5V . . . . . . . . . . . . . . . . . . . . . .±20mA DC Output Diode Current, IOK For VO < -0.5V or VO > VCC + 0.5V . . . . . . . . . . . . . . . . . . . .±20mA DC Output Source or Sink Current per Output Pin, IO For VO > -0.5V or VO < VCC + 0.5V . . . . . . . . . . . . . . . .
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CD54HC688, CD74HC688, CD54HCT688, CD74HCT688 DC Electrical Specifications (Continued) TEST CONDITIONS SYMBOL VI (V) IO (mA) High Level Input Voltage VIH - - Low Level Input Voltage VIL - High Level Output Voltage CMOS Loads VOH VIH or VIL PARAMETER 25oC VCC (V) -40oC TO 85oC -55oC TO 125oC MIN TYP MAX MIN MAX MIN MAX UNITS 4.5 to 5.5 2 - - 2 - 2 - V - 4.5 to 5.5 - - 0.8 - 0.8 - 0.8 V -0.02 4.5 4.4 - - 4.4 - 4.4 - V -4 4.5 3.98 - - 3.84 - 3.
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CD54HC688, CD74HC688, CD54HCT688, CD74HCT688 Switching Specifications Input tr, tf = 6ns (Continued) TEST SYMBOL CONDITIONS PARAMETER -40oC TO 85oC -55oC TO 125oC MIN TYP MAX MIN MAX MIN MAX UNITS 2 - - 120 - 150 - 180 ns 4.5 - - 24 - 30 - 36 ns CL =15pF 5 - 9 - - - - - ns CL = 50pF 6 - - 20 - 26 - 30 ns tTLH, tTHL CL = 50pF 2 - - 75 - 95 - 110 ns 4.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 25-Sep-2013 Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.
PAGE 10
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device CD74HC688M96 Package Package Pins Type Drawing SOIC SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) DW 20 2000 330.0 24.4 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 10.8 13.0 2.7 12.0 24.0 Q1 CD74HC688NSR SO NS 20 2000 330.0 24.4 8.2 13.0 2.5 12.0 24.0 Q1 CD74HC688PWR TSSOP PW 20 2000 330.0 16.4 6.95 7.1 1.6 8.0 16.
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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) CD74HC688M96 SOIC DW 20 2000 367.0 367.0 45.0 CD74HC688NSR SO NS 20 2000 367.0 367.0 45.0 CD74HC688PWR TSSOP PW 20 2000 367.0 367.0 38.0 CD74HC688PWT TSSOP PW 20 250 367.0 367.0 38.0 CD74HCT688M96 SOIC DW 20 2000 367.0 367.0 45.
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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.