Ring Signal
Description
V
AB
, Ringing
V
AB
, Ringing offset
Test Conditions (See Note 1)
Ringload = 1570
Ω
V
RINGIN
= 2.5 V
R
L
= Open circuit
Min
90
−5
95
Typ
93
0
100
10 k
VRING = 0.65 Vrms, R
L
= 1570
Ω
R
L
= 300
Ω
73
3
83
100
5
93
5
105
Max
Unit
Vpk
V
V/V
Ω
%
mA
Ω
4
4
Note
7
∆V
AB
⁄ ∆V
RINGIN
(VRINGIN gain)
Ring input impedance to R
REF
Harmonic distortion
Off-hook current limit
Ringing source impedance
Ground-Key Detector Thresholds
Description
Ground-key current threshold
Test Conditions (See Note 1)
B to ground
Min
Typ
11
Max
Unit
mA
Note
Loop Detector
Description
R
LTH
, Loop-resistance detect
threshold
I
LTH
, Loop-current detect threshold
Test Conditions (See Note 1)
Active
OHT
Standby
Min
−20
−20
−12
Typ
Max
20
20
12
%
9
Unit
Note
Relay Driver Output
(Relay 1 and 2)
Description
V
OL
, On voltage (each output)
V
OL
, On voltage (each output)
I
OH
, Off leakage (each output)
Zener breakover (each output)
Zener on voltage (each output)
Note:
* Performance Grade
Test Conditions (See Note 1)
I
OL
= 30 mA
I
OL
= 40 mA
V
OH
= +5 V
I
Z
= 100 µA
I
Z
= 30 mA
6.6
7.9
11
Min
Typ
+0.25
+0.30
Max
+0.4
+0.8
100
Unit
V
µA
V
Note
4
RELAY DRIVER SCHEMATIC
RYOUT1
RYOUT2
RYE
BGND
Note:
1.
Unless otherwise noted, test conditions are BAT1 = –99 V, BAT2 = –21 V, V
CC
= +5 V, V
NEG
= –5 V, R
L
= 600
Ω,
R
DC1
= 50 kΩ, R
DC2
= 50 kΩ, R
D
= 75 kΩ, no fuse resistors, C
HP
= 0.018 µF, C
DC
= 1.2 µF, D
1
= D
2
= 1N400x,
two-wire AC input impedance (ZSL) is a 600
Ω
resistance synthesized by the programming network shown below.
R
SGL
= open, R
SGH
= short to GND, R
DCR1
= 15 kΩ, R
DCR2
= 15 kΩ, C
DCR
= 10 nF, R
RT1
= 833 kΩ, R
RT2
= 42 kΩ, C
RT
= 1.0 µF,
V
REF
= 0 V.
BGND
10
Le79R101 Data Sheet
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
