M491B - SINGLE-CHIP VOLTAGE SYNTHESIS TUNING SYSTEM WITH 1 ANALOG CONTROL
The M491B is a monolithic N-MOS LSI circuit including a Floating-gate Non-Volatile Memory for storage of up to 16 stations.
Tuning of the station is performed with a 8192 step D/A converter, using the principle of voltage synthesis.
It is designed for 7-segment LED displays.
Direct memory selection
M491B SINGLE-CHIP VOLTAGE SYNTHESIS TUNING SYSTEM WITH 1 ANALOG CONTROL .
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16-STATION MEMORY - 7-SEGMENT LED DISPLAY VOLTAGE SYNTHESIZER : 13 BITS 4-BAND PRESET CAPABILITY NON-VOLATILE MEMORY : 304 BITS - 16 WORDS OF 19 BITS FOR TUNING VOLTAGE (13 bits) - BAND (2 bits) - FINE DETUNING (4 bits) - 104 MODIFY CYCLES PER WORD - MIN 10 YEARS DATA RETENTION PCM REMOTE CONTROL RECEIVER : DECODES SIGNAL TRANSMITTED BY M708 VOLUME D/A : 6-BIT RESOLUTION / 8kHz MEMORY SKIP FUN
M491B Features
* is implemented by combination of a rate multiplier and pulse width principle. With a tuning voltage increasing from zero, the number of pulses increases continuously up to
