LA8519M Datasheet, PDF (15/29 Pages) Sanyo Semicon Device – I/O Switch/Voice Signal-Processing IC for Cordless Telephones

LA8519M
Continued from preceding page.
Pin No.
Pin
Notes
Equivalent circuit
V_SP
15 kΩ
• Speech network system internal reference voltage
output. When the V_CC (pin 17) voltage is over
45
REF
3.5 V, the reference voltage is output from V_REF
45
V_REF
(pin 15). When the V_CC voltage is under 1.2 V, a
voltage of about (2/5) × V is output.
10 kΩ
• Speech network system internal power supply. A
voltage of about 0.3 V less than the voltage
46
VSP
applied to V_CC is output when the V_CC (pin 17)
voltage is over 3.5 V. When the V_CC voltage is
under 1.2 V, a voltage of about 0.3 V less than the
S-V_CC (pin 47) voltage is output.
• Speech network system power supply. When the
47
S-V_CC
V_CC voltage is under 1.2 V, power is supplied to
V_SP (pin 46) based on the line power.
48
48
VL
• Line current input and line voltage
49
TOI
• Current input for the transmitter output current
49
50
TOO
• Transmitter output current output
50
48
• First BN switching control input
51
BN1
• Second BN switching control input
51
52
BN2
Connect these inputs when two balancing
networks are used. When unused, leave these
pins open.
52
3 kΩ
6.2 kΩ
100 Ω
VL
53
SP-GND
• Speech network system ground
REF
54
RI-IN
• Receiver input amplifier minus input
55
55
RI-OUT
• Receiver input amplifier output
V_SP
54
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No. 6471-15/29