LE79R79-1DJC Zarlink, LE79R79-1DJC Datasheet - Page 21

• Manufacturer Part Number: LE79R79-1DJC
• Description: SLIC 1-CH 52dB 110mA 5V 32-Pin PLCC Tube
• Manufacturer: Zarlink

Specifications of LE79R79-1DJC

• Package: 32PLCC
• Number Of Channels Per Chip: 1
• Polarity Reversal: Yes
• Longitudinal Balanced: 52(Min) dB
• Loop Current: 110 mA
• Minimum Operating Supply Voltage: 4.75 V
• Typical Operating Supply Voltage: 5 V
• Typical Supply Current: 6.5 mA

APPLICATION CIRCUIT
Note:
The input should be 50% duty cycle CMOS-compatible input.
1. 1.25 CF
2. 25 mA I
3. 100 mA Ringing Current Limit
Assumptions:
RING
TIP
RFB = 50 Ω
RFA = 50 Ω
BAT1
1.5 µF
BAT1
BAT2
LOOP
C
RT
RYOUT1
RYOUT2
K1
G
K2
CBX = 2.2 nF
RYE
D
D
TISP
61089
1
2
0.1 µF
R
12 kΩ
0.1 µF
A
A
RT2
C
AX
18 nF
= 2.2 nF
4. 5.2 k Ω
5. 925 Ω
6. 600 Ω
C
R
515 k Ω
HP
RT1
High Battery Loop Threshold
Ringing Loop Threshold
Two-wire Impedance, 600 Ω Z
B(RING)
A(TIP)
HPA
HPB
RYOUT1
RYOUT2
RYE
RTRIP2
VBAT2
BGND
RTRIP1
VBAT1
Zarlink Semiconductor Inc.
Le79R79
U1
21
RINGIN
AGND/
L
RSGH
VNEG
DGND
RDCR
RSGL
B2EN
VCC
RDC
RSN
VTX
DET
7. G
8. - 70 V V bat1, - 24 V V bat2
RD
C1
C2
C3
D1
D2
E1
42L
R
R
50 kΩ
15 kΩ
R
DC1
T2
= 1
DCR1
66 kΩ
R
R
C
T1
D
T
125 kΩ
125 kΩ
50 kΩ
+5 V
R
C
0.33 µF
DC2
10 nF
C
SLEW
C
820 nF
open
R
DCR
150 k Ω
DET
C1
C2
C3
D1
D2
B2EN
E1
DC
SGH
R
SLEW
250 k Ω
- 5 V
R
RX
15 kΩ
R
DCR2
R
open
SGL
V
V
RX
TX
See note below.
ANALOG
GROUND
BATTERY
GROUND
DIGITAL
GROUND