HT93214B

HT93214 Series 1-memory Tone/Pulse Dialer Features · Operating Voltage: 2.0V~5.5V · Low standby current · Low memory retention current: 0.1mA (Typ.) · Tone/Pulse switchable · 32 (pulse)/31 (tone) digits for redialing · Pause and P ® T key for PBX · 4´4 keyboard matrix · 3.58MHz crystal or ceramic resonator · Hand-free control Patent Number: 86474, 84545(R.O.C) · Pause, P ® T can be saved for redialing · One-key redialing · Keytone output · Pause time: 2.2s · Cascadable manual dialing after redialing · Calibrated DTMF timing for redialing · HT93214A: 16-pin DIP package HT93214B/AT: 18-pin DIP package General Description The 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 ´ 4 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 external 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. Selection Table HT93214 series Function HandFree Part No. HT93214A HT93214B HT93214AT Ö Ö Key Tone Flash Control Control Control Flash Time (ms) 300/600 300/600 300/600 Inter Tone Pulse Tone Duration No. Pause (ms) (ms) N N N 94 94 94 96 96 96 PPS 10/20 10/20 10/20 M/B 1/2 1/2 1/2 PKG D...