le79r79 Zarlink Semiconductor, le79r79 Datasheet - Page 20

• Manufacturer Part Number: le79r79
• Description: Ringing Subscriber Line Interface Circuit
• Manufacturer: Zarlink Semiconductor

Le79R79 TEST CIRCUIT
Note:
1.
2.
Refer to the Applications Circuit on the next page for recommended configuration.
The input should be 50% duty cycle CMOS-compatible input.
1.5 µF
BAT1
BAT2
C
RT
B (RING)
RYOUT1
RYOUT2
A (TIP)
RYE
D
D
1
2
R
12 kΩ
2.2 nF
0.1 µF
RT2
0.1 µF
2.2 nF
18 nF
C
C
C
AX
HP
BX
R
430 k Ω
RT1
A (TIP)
HPA
HPB
B (RING)
RYOUT1
RYOUT2
RYE
VBAT1
VBAT2
BGND
RTRIP1
RTRIP2
Le79R79
Zarlink Semiconductor Inc.
20
RINGIN
AGND/
RSGH
VNEG
RDCR
DGND
RSGL
B2EN
VCC
RDC
RSN
VTX
DET
RD
C1
C2
C3
D1
D2
E1
300 k Ω
2.0 kΩ
R
R
80 kΩ
DCR
DC2
R
R
75 kΩ
T
D
20 kΩ
R
+5 V
C
1.2 µF
C
0.33 µF
DC1
DC
SLEW
open
R
100 k Ω
C1
C2
C3
D1
D2
DET
B2EN
E1
SGH
R
SLEW
300 k Ω
- 5 V
R
RX
R
open
SGL
V
V
RX
TX
See Note 2 below.
ANALOG
GROUND
BATTERY
GROUND
DIGITAL
GROUND