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PRODUCT INFO
MM74HC688WMX by FAIRCHILD
Image is representational - see manufacturer’s specifications
FAIRCHILD

MM74HC688WMX

Fairchild

Identity Comparator 8-Bit 20-Pin SOIC W T/R

PRICING per each  AVAILABILITY real time   
1-24 :$0.39
25-99 :$0.35
100-249 :$0.32
250-499 :$0.29
500-999 :$0.25
1,000-1,999 :$0.24
2,000 + :$0.24
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RESOURCES
SPECS
Supplier: Fairchild
Part No: MM74HC688WMX
RoHS: Yes
Maximum Low Level Output Current: 5.2 mA
Type: Identity Comparator
Output Type: N/A
Maximum Quiescent Current: 0.008 mA
Family: MM74HC688
Polarity: Inverting
Supplier_Package: SOIC W
Packaging: Tape and Reel
Output Function: A=B
Pin_Count: 20
Number of Bits: 8
Mounting: Surface Mount
Maximum High Level Output Current: -5.2 mA
Dimension: 12.8 x 7.5 x 2.35(Max)mm
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DESCRIPTION

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.

Product Highlights

  • Typical propagation delay: 20 ns
  • Wide power supply range: 2-6V
  • Low quiescent current: 80 µA (74 Series)
  • Large output current: 4 mA (74 Series)
  • Same as HC521
PART CLASSIFICATION DATA
HTS: 8542390000
ECCN: EAR99
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