le7920 Zarlink Semiconductor, le7920 Datasheet - Page 16

• Manufacturer Part Number: le7920
• Description: Subscriber Line Interface Circuit
• Manufacturer: Zarlink Semiconductor

TEST CIRCUITS (continued)
B(RING)
A(TIP)
BAT
2.2 nF
2.2 nF
D
1
C
HP
R
TMG
G. Le7920 Test Circuit
DB
DA
A(TIP)
HPA
HPB
B(RING)
RINGOUT
RYOUT1
RYOUT3
RYOUT3
BGND
VBREF
VBAT
TMG
Zarlink Semiconductor Inc.
16
AGND/
DGND
RDC
VCC
RSN
CAS
DET
VTX
RD
D3
D2
D1
C2
C1
R
DC1
R
C
D
CAS
+5 V
R
R
C
T
DC2
DC
C
D
R
RX
V
V
TX
RX
BATTERY
GROUND
GROUND
GROUND
ANALOG
DIGITAL