SN74LS688NS

SN74LS688NS

  • Description:IC COMPARATOR IDENTITY 8BIT 20SO
  • Series:74LS
  • Mfr:Texas Instruments
  • Package:Tube

SKU:73c0b33173d3 Category: Brand:

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Product Detailed Parameters

  • Description:IC COMPARATOR IDENTITY 8BIT 20SO
  • Series:74LS
  • Mfr:Texas Instruments
  • Package:Tube
  • Type:Identity Comparator
  • Number of Bits:8
  • Output:Active Low
  • Output Function:A=B
  • Voltage - Supply:4.85V ~ 5.25V
  • Current - Output High, Low:400µA, 24mA
  • Max Propagation Delay @ V, Max CL:23ns @ 5V, 45pF
  • Current - Quiescent (Iq):65 mA
  • Operating Temperature:0°C ~ 70°C
  • Package / Case:20-SOIC (0.209", 5.30mm Width)
  • Supplier Device Package:20-SO
  • Mounting Type:Surface Mount
  • Grade:-
  • Qualification:-

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SN74LS688NS

Buying Guide
Summary

Texas Instruments SN74LS688NS is sourced in Comparators category when teams want clear constraints and a repeatable validation path. Key specs include Description (IC COMPARATOR IDENTITY 8BIT 20SO), Series (74LS), Type (Identity Comparator), Packaging (Tube), and Supply (4.85V ~ 5.25V).

Selection Notes
  • For SN74LS688NS, ensure the package/case (20-SOIC (0.209", 5.30mm Width)) and land pattern match your PCB layout before procurement.
  • Check the supply current (400µA, 24mA) in your power budget and thermal plan.
  • Match the output type (Active Low) when selecting alternates or second sources.
  • Validate the operating temperature range (0°C ~ 70°C) for your environment and margin.
Alternates & Substitutions
  • For Comparators, compare the datasheet test conditions behind key specs and re-check the margins that were tightest during bring-up.
  • Before looking at performance tables, lock package/case 20-SOIC (0.209", 5.30mm Width), supplier package 20-SO, mounting Surface Mount and verify the system envelope (supply 4.85V ~ 5.25V, temperature 0°C ~ 70°C) to avoid a non-drop-in swap.
  • When in doubt, treat the swap as an ECO: define acceptance criteria, then validate under worst-case operating corners.
  • If you need a second source, provide (package 20-SOIC (0.209", 5.30mm Width), supply 4.85V ~ 5.25V) and we will suggest options to evaluate under a clear test plan.
FAQ

Which Number of Bits is listed for SN74LS688NS?
8

What current consumption is specified for SN74LS688NS?
400µA, 24mA

What operating temperature range does SN74LS688NS support?
0°C ~ 70°C

Which package/case is specified for SN74LS688NS?
20-SOIC (0.209", 5.30mm Width)

Application Scenarios

In many Comparators builds, Texas Instruments SN74LS688NS is reviewed for predictable behavior, supportability, and stable qualification evidence. Good analog integration simplifies validation by reducing sensitive external networks that would otherwise vary across builds. They condition, convert, or interface signals so systems can capture or generate analog information with defined accuracy, latency, and noise behavior. Layout and hysteresis strategy often determine noise immunity and false-trigger rate in the real environment. In energy metering, accuracy is maintained across noisy mains and wide temperature swings. In sensor interfaces, comparators provide clean thresholding for proximity and speed signals in noisy cabinets where EMI and long cables can inject spurious edges. In timing and clock conditioning, comparators translate sine-like signals into logic edges where input common-mode range and noise margin determine jitter performance. In battery systems, window comparators support undervoltage/overvoltage monitoring where accuracy and stable thresholds matter across temperature.

Compatibility Advice
  • In practice, validate stability with the real source impedance and load so phase margin is not assumed from typical-only plots with the final enclosure and cabling.
Project Fit
  • Best fit for Comparators when you can validate the key assumptions on the assembled system and keep acceptance criteria measurable.
SN74LS688NSSN74LS688NS

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