
Lucent Technologies Inc.
5
Advance Data Sheet
March 1997
L8575
Dual-Resistive, Low-Cost SLIC
Preliminary Pin Information
12-3364(F)
Figure 2. 44-Pin PLCC Pinout
Table 1. Pin Descriptions
Pin Symbol Type
1
NC
2
DO
Name/Function
—
O
No Connect.
Serial Data Output.
output with the clock signal on pin CLK.
Serial Data Input.
Data on this logic input is shifted into the 8-bit serial shift register with
the clock signal on pin CLK.
Fault Filter (Channel B).
Connect a 0.1
μ
F capacitor from CFLTB to AGND. This capaci-
tor filters Tip/Ring transients from the channel B fault detector.
5 V Digital dc Supply.
5 V supply for logic and relay driver flyback diodes.
Digital Ground.
Ground for channel B relay drivers.
Disconnect Relay Driver (Channel B).
This output drives the external relay.
Ringing Relay Driver (Channel B).
This output drives an external ringing relay.
Test Relay Driver (Channel B).
This output drives an external test relay.
Ring-Trip Positive (Channel B).
Positive sense input for the ring-trip detector.
Unused pin (no internal connection).
Data in the internal 8-bit serial shift register is shifted out on this logic
3
DI
I
4
CFLTB
I/O
5
6
7
8
9
V
DDD
—
—
O
O
O
I
DGND
RDDB
RDRB
RDTB
RTPB
10
RDRA
RTPA
RDTA
XMTA
TSA
RSA
RGBNA
VRNA
RTPB
RDTB
RDRB
XMTB
TSB
RSB
RGBNB
VRNB
7
9
10
11
12
13
14
15
16
17
8
6
4
3
2
1
44
43
42
41
40
5
18
20
21
22
23
24
25
26
27
28
19
39
37
36
35
34
33
32
31
30
29
38
RDDB
RTNB
RTNA
P
P
A
C
C
A
P
P
V
D
D
N
C
C
D
E
D
C
V
D
D
RDDA
IRPA
V
B
V
D
V
B
IRPB
L8575