KS58006

KS58006 TONE/PULSE DIALER WITH REDIAL INTRODUCTION The KS58006 is DTMF/PULSE switchable dialer with a 32-digit redial which can be done using a slide switch. All necessary dual-tone frequencies are derived from a 3.579545 MHz TV crystal or ceramic resonator providing very high accuracy and stability. The required sinusoidal wave form for each individual tone is digitally synthesized on the chip. The generated wave form has very low total harmonic distortion (7% max). A voltage reference is generated on the chip which is stable over the operating voltage and temperature range and regulates the single levels of the dual tone to meet telephone industry specifications. CMOS technology is applied to this device, for very low power requirements high noise immunity, and easy interface to a variety of telephones requiring external components. 18-DIP-300A FEATURES Tone/Pulse switchable (slide switch) 32-digit capacity for redial Automatic mix redialing ( last number dial ) of PULSE → DTMF with multiple auto access pause PABX auto-pause for 3.5 sec. 4 X 4 or ( 2 of 8 ) keyboard available Two key single tone operation Operating Voltage : 2.0 ~ 5.5V Numbers dialed manually after redial are cascadable and stored as additional numbers for next redialing Uses inexpensive TV crystal or ceramic resonator (3.579545MHz) Make/Break ratio (33.3 / 66.6) pin selectable Touch key hooking (604ms) Low standby current Improved EMI characteristic Improved redial memory qu...