L8583D Line Card Access Switch
Data Sheet
October 2002
Description
(continued)
To protect the L8583D from an overvoltage fault condi-
tion, use of a secondary protector is required. The
secondary protector must limit the voltage seen at the
tip/ring terminals to prevent the breakdown voltage of
the switches from being exceeded. To minimize stress
on the solid-state contacts, use of a foldback-type or
crowbar-type secondary protector is recommended.
Please contact your Legerity account representative for
a choice of recommended secondary protection
device. With proper choice of secondary protection, a
line card using the L8583D will meet all relevant ITU-T,
LSSGR, FCC, or
UL
®
protection requirements.
The L8583D operates off of a 5 V supply only. This
gives the device extremely low idle and active power
dissipation and allows use with virtually any range of
battery voltage. This makes the L8583D especially
appropriate for remote power applications such as
DAML or FOC/FITL or other
Telcordia Technologies
GR 909 applications where power dissipation is partic-
ularly critical.
A battery voltage is also used by the L8583D, only as a
reference for the integrated protection circuit. The
L8583D will enter an all-off state upon loss of battery.
During power ringing, to turn on and maintain the on
state, the ring access switch and ring test switch will
draw a nominal 2 mA from the ring generator.
The L8583D device is packaged in a 20-pin plastic
SOG (L8583DEY) and a 28-pin plastic SOG
(L8583DAE). See Figure 1 for an illustration of the
20-pin package and Figure 2 for an illustration of the
28-pin package.
Pin Information
F
GND
T
TESTin
T
BAT
T
LINE
T
RINGING
T
TESTout
NC
V
DD
T
SD
1
2
3
SW3
SW4
SW6
SW1
SW2
20 V
BAT
19 R
TESTin
18 R
BAT
SW5
4
5
17 R
LINE
16 R
RINGING
SW7
SW8
SW10
6
7
8
9
SW9
15 R
TESTout
14 LATCH
CONTROL
LOGIC
13 IN
TESTin
12 IN
RING
11 IN
TESTout
D
GND
10
1670
Figure 1. 20-Pin Plastic SOG
F
GND
NC
NC
NC
T
TESTin
T
BAT
T
LINE
T
RINGING
NC
T
TESTout
1
2
3
4
SW1
SW2
28
27
26
25
24
23
SW3
SW5
SW6
SW7
SW8
SW9
SW10
SW4
V
BAT
NC
NC
NC
R
TESTin
R
BAT
R
LINE
NC
R
RINGING
R
TESTout
LATCH
IN
TESTin
IN
RING
IN
TESTout
12-2365 (F).d
5
6
7
8
9
10
22
21
20
19
18
NC 11
V
DD
12
T
SD
13
D
GND
14
CONTROL
LOGIC
17
16
15
Figure 2. 28-Pin Plastic SOG
2
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
