4087B
Abstract: LR4087 LR4087B
Contextual Info: SHARP L R 4 0 8 7 B /L R LR4087B/LR4087BN Tone Dialer LSI 4 0 8 7 B N DESCRIPTION PIN CONNECTIONS The LR 4087B /LR 4087B N is m o n o lith ic tone dialer LSI which uses an inexpensive crystal ref erence to provide eight audio sinusoidal frequen cies. Dual-Tone Multi-Frequency signals are ob
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LR4087
Abstract: LR4087B
Contextual Info: LR4087B/ LR4087BN SHARP R 4 8 7 B / L R 4 8 7 B DESCRIPTION The LR 4087B /LR 4087B N is monolithic tone dialer LSI which uses an inexpensive crystal ref erence to provide eight audio sinusoidal frequen cies. Dual-Tone Multi-Frequency signals are ob tained by mixing these frequencies.
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LR4087B
Abstract: LR4087 circuit of rowa television lr4087bn lr4067b
Contextual Info: LR4087B/LR4087BN SHARP L R 4 8 7 B / L R 4 8 7 B PIN CONNECTIONS DESCRIPTION T h e L R 4 0 8 7 B /L R 4 0 8 7 B N is m o n o lith ic to n e dialer LSI which uses an inexpensive crystal ref erence to provide eight audio sinusoidal frequen cies. Dual-Tone M ulti-Frequency signals are ob
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