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LS1240
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Contek Microelectronics
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Electronic tone ringer with built-in bridge rectifier. Supply voltage Vs=26V. Current consumption without load Ib=1.5A (typ). Activation voltage Von=12V(min),13.5V(max). Sustaining voltage Voff=8V(min),9V(max). | 
Original | 
PDF
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30.01KB | 
3 | 
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LS1240
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Fairchild Semiconductor
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Octal 3-STATE Bus Driver | 
Original | 
PDF
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40.59KB | 
4 | 
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LS1240
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STMicroelectronics
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ELECTRONIC TWO-TONE RINGER | 
Original | 
PDF
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509.88KB | 
7 | 
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LS1240
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Wing Shing Computer Components
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Electronic Two-Tone Ringer | 
Original | 
PDF
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286.07KB | 
4 | 
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LS1240
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Unknown
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Shortform IC and Component Datasheets (Plus Cross Reference Data) | 
Short Form | 
PDF
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79.16KB | 
1 | 
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LS1240A
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Contek Microelectronics
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Electronic tone ringer with built-in bridge rectifier. Supply voltage Vs=26V. Current consumption without load Ib=1.5A (typ). Activation voltage Von=12V(min),13.5V(max). Sustaining voltage Voff=7.8V(min),9.3V(max). | 
Original | 
PDF
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30.01KB | 
3 | 
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LS1240A
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STMicroelectronics
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Electronic two-tone ringer | 
Original | 
PDF
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208.17KB | 
9 | 
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LS1240A
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STMicroelectronics
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ELECTRONIC TWO-TONE RINGER | 
Original | 
PDF
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87.78KB | 
7 | 
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LS1240A
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STMicroelectronics
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ELECTRONIC TWO-TONE RINGER | 
Original | 
PDF
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509.87KB | 
7 | 
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LS1240A
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Wing Shing Computer Components
 | 
Electronic Two-Tone Ringer | 
Original | 
PDF
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286.09KB | 
4 | 
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LS1240A
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Unknown
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Shortform IC and Component Datasheets (Plus Cross Reference Data) | 
Short Form | 
PDF
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79.16KB | 
1 | 
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LS1240A-D08-T
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Unisonic Technologies
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ELECTRONIC TONE RINGER WITH BUILT-IN BRIDGE RECTIFIER | 
Original | 
PDF
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221.54KB | 
5 | 
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LS1240AD1
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STMicroelectronics
 | 
Electronic two-tone ringer | 
Original | 
PDF
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208.17KB | 
9 | 
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LS1240AD1
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STMicroelectronics
 | 
ELECTRONIC TWO-TONE RINGER | 
Original | 
PDF
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509.88KB | 
7 | 
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LS1240AD1
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Wing Shing Computer Components
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Electronic Two-Tone Ringer | 
Original | 
PDF
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286.09KB | 
4 | 
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LS1240AD1013TR
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STMicroelectronics
 | 
ELECTRONIC TWO-TONE RINGER | 
Original | 
PDF
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509.88KB | 
7 | 
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LS1240A-S08-R
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Unisonic Technologies
 | 
ELECTRONIC TONE RINGER WITH BUILT-IN BRIDGE RECTIFIER | 
Original | 
PDF
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221.54KB | 
5 | 
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LS1240A-S08-T
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Unisonic Technologies
 | 
ELECTRONIC TONE RINGER WITH BUILT-IN BRIDGE RECTIFIER | 
Original | 
PDF
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221.54KB | 
5 |