le79r70 Zarlink Semiconductor, le79r70 Datasheet - Page 17

• Manufacturer Part Number: le79r70
• Description: Ringing Subscriber Line Interface Circuit
• Manufacturer: Zarlink Semiconductor

TEST CIRCUITS (continued)
Note:
The input should be 50% duty cycle CMOS-compatible input.
1.5 µF
C
BAT1
BAT2
RT
B(RING)
A(TIP)
12 kΩ
R
RT2
D
D
2.2 nF
1
2
C
C
2.2 nF
AX
BX
C
HP
0.1 µF
0.1 µF
430 kΩ
R
RT1
18 nF
RTRIP2
RTRIP1
A(TIP)
HPA
HPB
B(RING)
VBAT1
VBAT2
RYOUT1
RYOUT2
RYE
BGND
H. Le79R70 Test Circuit
Zarlink Semiconductor Inc.
RINGIN
AGND/
DGND
RSGH
VNEG
RSGL
RDCR
B2EN
17
VCC
RSN
DET
VTX
RDC
RD
C1
C2
C3
D1
D2
E1
2.0 kΩ
300 kΩ
80 kΩ
R
R
75 kΩ
DC1
DCR
R
R
T
D
+5 V
C
0.33 µF
SLEW
20 kΩ
100 kΩ
R
C
R
DC2
DC
R
open
SGH
–5 V
SLEW
300 kΩ
1.2 µF
R
RX
R
open
SGL
V
V
TX
RX
See Note.
BATTERY
GROUND
GROUND
GROUND
ANALOG
DIGITAL