HT93214A

1-memory Tone/Pulse Dialer

GeneralDescription TheHT93214aredialerseriesdesignedforlowcosttelephonesetapplicationswithexpandablefeaturessuchasLockfunction,keytoneandLCDdisplayinterface.Witha44keyboard,itperformsnormaltone/pulseswitchabledialing,andprovidesone-keyredialingfunctionwith

HT93214A

1-memory Tone/Pulse Dialer; Operating Voltage: 2.0V~5.5V\nLow standby current\nLow memory retention current: 0.1\u0003A (Typ.)\nTone/Pulse switchable\n32 (pulse)/31 (tone) digits for redialing\nPause and P \u0004 T key for PBX\n4\u00054 keyboard matrix\n3.58MHz crystal or ceramic resonator\nHand-free control\nPause, P \u0004 T can be saved for redialing\nOne-key redialing\nKeytone output\nPause time: 2.2s\nCascadable manual dialing after redialing\nCalibrated DTMF timing for redialing\nHT93214A: 16-pin DIP package\nHT93214B/AT: 18-pin DIP package;

General Description\nThe HT93214 are dialer series designed for low cost telephone set applications with expandable features such as Lock function, keytone and LCD display interface. With a 4\u00054 keyboard, it performs normal tone/pulse switchable dialing, and provides one-key redialing function with a 32-digit memory for speed dialing. An on-chip oscillator is built-in to work with an exter nal 3.58Mhz crystal or ceramic resonator for accurate timing. The HT93214 provides 300ms (F1 key) and 600ms (F2 key) of flash time; Tone dialing and 10pps, 20pps selection with 1/2 M/B ratio for pulse dialing.

HT93214AT

1-memory Tone/Pulse Dialer

GeneralDescription TheHT93214aredialerseriesdesignedforlowcosttelephonesetapplicationswithexpandablefeaturessuchasLockfunction,keytoneandLCDdisplayinterface.Witha44keyboard,itperformsnormaltone/pulseswitchabledialing,andprovidesone-keyredialingfunctionwith

HT93214

1-memoryTone/PulseDialer

GeneralDescription TheHT93214aredialerseriesdesignedforlowcosttelephonesetapplicationswithexpandablefeaturessuchasLockfunction,keytoneandLCDdisplayinterface.Witha44keyboard,itperformsnormaltone/pulseswitchabledialing,andprovidesone-keyredialingfunctionwith

HT93214B

1-memoryTone/PulseDialer

GeneralDescription TheHT93214aredialerseriesdesignedforlowcosttelephonesetapplicationswithexpandablefeaturessuchasLockfunction,keytoneandLCDdisplayinterface.Witha44keyboard,itperformsnormaltone/pulseswitchabledialing,andprovidesone-keyredialingfunctionwith