इसी प्रकार केSM187B

• SM1871
  • 5 V, +/-50 ppm, positive ECL crystal clock oscillator
• SM1877
  • 5 V, +/-25 ppm, positive ECL crystal clock oscillator
• SM1879
  • 5 V, customer specific, positive ECL crystal clock oscillator
• SM1879
  • 5 V, customer specific, positive ECL crystal clock oscillator
• SM187A
  • "5 V, +/-20 ppm, positive ECL crystal clock oscillator"
• SM187B
  • 5 V, +/-50 ppm, positive ECL crystal clock oscillator
• SM187C
  • 5 V, +/-100 ppm, positive ECL crystal clock oscillator