MITSUMI
IC for Multifunction Telephones LAG639
IC for Multifunction Telephones
Monolithic IC LAG639
Outline
This IC was developed for use in home-use telephone and small-scale telephone systems, and incorporates
data transmission functions (AMI).
Features
1. Incorporates efficient switching regulator with broad input voltage range
V
OUT
5V±0.25
I
L
250mA (13~45V)
V
IN
15~45V
2. Internal data transmission/reception circuits
Data can be superposed on the power supply line for transmission.
AMI format is used for transmission route coding.
3. Internal system reset circuit
5V line abnormal voltage detection circuit
Watchdog timer reset circuit
4. Internal speaker amp
260 mW typ. at 8Ω load
Mute pin
5. Internal beep sound generator circuit
With pin to vary audio volume (also used to turn beep sound on and off)
Package
SDIP-30A (LAG639D)
Absolute Maximum Ratings
Item
Operating temperature
Storage tempereture
Power supply voltage
Allowable loss
(Ta=25
°
C)
Symbol
T
OPR
T
STG
V
CC
max.
Pd
Ratings
-20~+70
-40~+125
46
750
Units
°
C
°
C
V
mW
MITSUMI [ MITSUMI ELECTRONICS, CORP. ]
