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27.1.1999
Xo0245e4_fm5.fm
8
Product: LIF-40 (Line Interface) / YO0245
BENEF N
Title: Line interface
Date: 21.4.1993 / HJo
PCF 8574
I2C address 4AH
IICINT
SDA
SCL
VB
+5V
REG.
RXAUDIO
TXAUDIO
DC/DC Converter
LPF
LB
LA
HOOK DET.
4/2-WIRE
AUDIO
CONV.
OSCILLATOR/
DIVIDER
(74HC4060)
P0/RING_OFF
Input: 5.5V - 10V
Out: 15V +- 3V
/ 60V+- 10V
25Hz
.
220kHz
400Hz
P2/400HZ_OFF
P4/HOOK_DET (+5V=ON HOOK)
P1/PWR_OFF
Current sink