MM74HC688MTCX

MM74HC688MTCX Datasheet

MM74HC688 8-Bit Magnitude Comparator Equality Detector

Part	Datasheet
MM74HC688MTCX	MM74HC688MTCX (pdf)

Related Parts	Information
MM74HC688WM	MM74HC688WM
MM74HC688SJX	MM74HC688SJX
MM74HC688MTC	MM74HC688MTC
MM74HC688WMX	MM74HC688WMX
MM74HC688N	MM74HC688N
MM74HC688SJ	MM74HC688SJ

PDF Datasheet Preview
MM74HC688 8-Bit Magnitude Comparator Equality Detector MM74HC688 8-Bit Magnitude Comparator Equality Detector The MM74HC688 equality detector utilizes advanced silicon-gate CMOS technology to compare bit for bit two 8-bit words and indicates whether or not they are equal. The P Q output indicates equality when it is LOW. A single active low enable is provided to facilitate cascading of several packages and enable comparison of words greater than 8 bits. This device is useful in memory block decoding applications, where memory block enable signals must be generated from computer address information. The comparator’s output can drive 10 low power Schottky equivalent loads. This comparator is functionally and pin compatible to the 74LS688. All inputs are protected from damage due to static discharge by diodes to VCC and ground. s Typical propagation delay 20 ns s Wide power supply range s Low quiescent current 80 PA 74 Series s Large output current 4 mA 74 Series s Same as HC521 Ordering Code: Order Number Package Number Package Description MM74HC688WM M20B 20-Lead Small Outline Integrated Circuit SOIC , JEDEC MS-013, Wide MM74HC688SJ M20D 20-Lead Small Outline Package SOP , EIAJ TYPE II, 5.3mm Wide MM74HC688MTC MTC20 20-Lead Thin Shrink Small Outline Package TSSOP , JEDEC MO-153, 4.4mm Wide MM74HC688N N20A 20-Lead Plastic Dual-In-Line Package PDIP , JEDEC MS-001, Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Logic Diagram Pin Assignments for DIP Truth Table Top View Inputs Data Enable PQ L H 2005 Fairchild Semiconductor Corporation DS005018 MM74HC688 Absolute Maximum Ratings Note 1 Note 2 Recommended Operating Conditions Supply Voltage VCC DC Input Voltage VIN DC Output Voltage VOUT Clamp Diode Current IIK, IOK DC Output Current, per pin IOUT DC VCC or GND Current, per pin ICC Storage Temperature Range TSTG Power Dissipation PD Note 3 S.O. Package only Lead Temperature TL Soldering 10 seconds to VCC Supply Voltage VCC to VCC DC Input or Output Voltage r20 mA VIN, VOUT r25 mA Operating Temperature Range TA r50 mA Input Rise or Fall Times to tr, tf VCC 2.0V Max 6 1000 Units V 600 mW 500 mW VCC 4.5V VCC 6.0V Note 1 Absolute Maximum Ratings are those values beyond which dam- age to the device may occur. 260qC Note 2 Unless otherwise specified all voltages are referenced to ground. Note 3 Power Dissipation temperature derating plastic “N” package 12 mW/qC from 65qC to 85qC. DC Electrical Characteristics Note 4 Parameter Conditions TA 25qC TA to 85qC TA to 125qC Units Guaranteed Limits Minimum HIGH Level

PDF Datasheet Preview

MM74HC688 8-Bit Magnitude Comparator Equality Detector

MM74HC688 8-Bit Magnitude Comparator Equality Detector

The MM74HC688 equality detector utilizes advanced silicon-gate CMOS technology to compare bit for bit two 8-bit words and indicates whether or not they are equal. The P Q output indicates equality when it is LOW. A single active low enable is provided to facilitate cascading of several packages and enable comparison of words greater than 8 bits.

This device is useful in memory block decoding applications, where memory block enable signals must be generated from computer address information.

The comparator’s output can drive 10 low power Schottky equivalent loads. This comparator is functionally and pin compatible to the 74LS688. All inputs are protected from damage due to static discharge by diodes to VCC and ground.
s Typical propagation delay 20 ns s Wide power supply range s Low quiescent current 80 PA 74 Series s Large output current 4 mA 74 Series s Same as HC521
Ordering Code:

Order Number Package Number

Package Description

MM74HC688WM

M20B
20-Lead Small Outline Integrated Circuit SOIC , JEDEC MS-013, Wide

MM74HC688SJ

M20D
20-Lead Small Outline Package SOP , EIAJ TYPE II, 5.3mm Wide

MM74HC688MTC

MTC20
20-Lead Thin Shrink Small Outline Package TSSOP , JEDEC MO-153, 4.4mm Wide

MM74HC688N

N20A
20-Lead Plastic Dual-In-Line Package PDIP , JEDEC MS-001, Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Connection Diagram

Logic Diagram

Pin Assignments for DIP

Truth Table

Top View

Inputs

Data

Enable

PQ L H
2005 Fairchild Semiconductor Corporation DS005018

MM74HC688

Absolute Maximum Ratings Note 1

Note 2

Recommended Operating Conditions

Supply Voltage VCC DC Input Voltage VIN DC Output Voltage VOUT Clamp Diode Current IIK, IOK DC Output Current, per pin IOUT DC VCC or GND Current, per pin ICC Storage Temperature Range TSTG Power Dissipation PD

Note 3

S.O. Package only

Lead Temperature TL Soldering 10 seconds
to VCC Supply Voltage VCC
to VCC DC Input or Output Voltage
r20 mA VIN, VOUT r25 mA Operating Temperature Range TA r50 mA Input Rise or Fall Times
to tr, tf VCC 2.0V

Max 6
1000

Units V
600 mW 500 mW

VCC 4.5V

VCC 6.0V

Note 1 Absolute Maximum Ratings are those values beyond which dam-
age to the device may occur.
260qC

Note 2 Unless otherwise specified all voltages are referenced to ground.

Note 3 Power Dissipation temperature derating plastic “N” package 12 mW/qC from 65qC to 85qC.

DC Electrical Characteristics Note 4

Parameter

Conditions

TA 25qC

TA to 85qC TA to 125qC Units

Guaranteed Limits

Minimum HIGH Level

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived MM74HC688MTCX Datasheet file may be downloaded here without warranties.

Datasheet ID: MM74HC688MTCX 634396