le79r70 Zarlink Semiconductor, le79r70 Datasheet - Page 10

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

ELECTRICAL CHARACTERISTICS (continued)
RELAY DRIVER SCHEMATIC
Logic Inputs (C3–C1, D2–D1, E1, and B2EN)
V
V
I
I
Logic Output DET
V
V
Ring-Trip Detector Input
Ring detect accuracy
Ring Signal
V
V
∆V
Ground-Key Detector Thresholds
Ground-key resistive threshold
Ground-key current threshold
Loop Detector
R
Relay Driver Output (RELAY1 and 2)
V
V
I
Zener breakover (each output)
Zener on voltage (each output)
IH
IL
OH
IH
IL
OL
OH
AB
AB
OL
OL
LTH
, Input Low current
, Input High current
AB
, Input Low voltage
, Input High voltage
, Off leakage (each output)
, Output Low voltage
, Ringing
, On voltage (each output)
, On voltage (each output)
, Output High voltage
Ringing offset
, Loop-resistance detect threshold
/∆V
RINGIN
Description
(RINGIN gain)
BGND
I
I
Bat1 = –67 V, ringload = 1570 Ω
V
B to ground
B to ground
Active, V
Active, V
Standby
I
I
V
I
I
IRTD
OUT
OUT
OL
OL
Z
Z
RINGIN
OH
Test Conditions (See Note 1)
= 100 µA
= 30 mA
= 30 mA
= 40 mA
RYOUT1
= +5 V
= 0.8 mA, 15 kΩ to V
= –0.1 mA, 15 kΩ to V
Zarlink Semiconductor Inc.
=
= 2.5 V
RYE


BAT1
BAT2
--------------------------- -
BAT1
RRT1
10
–
1
+
24 µA
CC
CC


•
335
BGND
Min
–400
–75
–10
–20
–20
–12
2.0
2.4
6.6
57
2
RYOUT2
Typ
+0.25
+0.30
180
7.9
61
11
11
0
5
Max
0.40
+0.4
+0.8
+10
100
0.8
40
10
20
20
12
Unit
Vpk
mA
µA
kΩ
µA
—
%
%
V
V
V
V
V
Note
8
4