BU8244F

Features:

1) Eight input signals are selected and mixed by a cross-point, and output to eight pins (BU8241F/BU8241FS).
2) A power save mode enables the circuit to run on line current if the power supply fails.
    1. Line current consumption reduced (IDD2 = 580A)
    2. IN1  OUT1 and IN2  OUT2 only are on
3) Serial binary data input.
4) Low voltage and current consumption.


Application

Telephones, telephone answering machines, cordless telephones


Specifications

Parameter	Symbol	Limits	Unit
Power supply voltage	VDD	7	V
Input voltage	VIN	GND-0.3~VDD+0.3	V
Output voltage	VOUT	GND-0.3~VDD+0.3	V
Power dissipation	Pd	550 (BU8241F/BU8242F)*1	mW
		800 (BU8241FS)             *2
		500 (BU8244F)               *3
Operating temperature	Topr	-25~+75
Storage temperature	Tstg	-55~+125

*1 Reduced by 5.5mW for each increase in Ta of 1 over 25.
*2 Reduced by 8mW for each increase in Ta of 1 over 25.
*3 Reduced by 5mW for each increase in Ta of 1 over 25.


Description

The BU8241F, BU8241FS, BU8242F, and BU8244F are ICs developed for use with cordless telephones, and are equipped with switching and mixing functions. In addition, BU8244F  are provided with an internal power save function which enables the circuit to be run on line current if the power supply fails, by connecting a switch between the circuit and a new handset, reducing line current consumption. A series of these ICs is also under development, based on the number of circuits.