EM91810B

Features:

`  Tone/pulse switchable dialer.
` One 32-digit last number redial memory.
` Pulse to tone (P?T) is provided for PBX operation.
` Flash key is available.
` Minimum tone duration is 98ms or 83ms.
` Minimum intertone pause is 98ms or 83ms.
` Uses 3.579545 MHz crystal or ceramic resonator.
` Many options can be selected.
   Mode (10 PPS ; 20 PPS ; Tone)
   M/B ratio (40 : 60 ; 33 : 66)
   Pause time (3.6s)
` Flash function (RESET)
   PT pause time (3.6s)
   Flash time (600ms; 300ms; 100ms; or 80ms).
` Mixed dialing.
` Handfree function is provided for speaker phone application.
` Power on reset circuit is provided.
` Package in DIP18 or DIP20.
` SDO function that is supported to drive LCD driver (EM32100) and voice synthesizer to indicate dialing number.
`Key tone function is provided.


Pinout

Specifications

Items	Sym.	Rating	Unit
Power supply voltage	VDD	6.0Vdc	V
Input voltage range	VIN	Vss-0.3v~VDD+0.3v	V
Operating temperature	TOPR	0~+50
Storage temperature	TSTO	-55~125
Power consumption	PD	500	mW

Description

The EM91810A/B are Tone/Pulse switchable dialer which are fabricated in CMOS technology with wide operating voltage for both tone and pulse mode, and consumes very low memory retention current in ON-HOOK state. EM91810A/B also provide SDO (serial data output) function to drive LCD driver (EM32100, EM32116, EM32117) and voice synthesizer.