T1/E1 Short Haul Transceiver with Crystal-less Jitter Attenuation — LXT351
1.1
Mode Dependent Signals
As shown in Figure 2, the LXT351 has several pins that change function (and signal name)
according to the selected mode(s) of operation. These pins, associated signal names, and operating
modes are summarized in Table 1 and Table 2. LXT351 signals are described in Table 3.
Table 1. LXT351 Clock and Data Pin Assignments by Mode1
Pin #
PLCC
External Data Modes
QRSS Modes
Bipolar Mode Unipolar Mode
QFP
Bipolar Mode
Unipolar Mode
1
2
39
41
42
43
3
MCLK
TCLK
3
TPOS
TNEG
RNEG
RPOS
TDATA
INSBPV
BPV
INSLER
INSBPV
4
6
RNEG
RPOS
BPV
7
4
RDATA
RDATA
8
5
RCLK
TTIP
13
16
19
20
15
19
24
25
TRING
RTIP
RRING
1. Data pins change based on whether external data or internal QRSS mode is active.
Table 2. LXT351 Processor Interface Pins
Pin #
Address/Data Bus Type
Pin #
Address/Data Bus Type
Intel Motorola
PLCC QFP
Intel
Motorola
PLCC QFP
5
2
ALE
RD
AS
DS
25
26
27
28
10
11
-
35
36
37
38
9
AD2
AD3
AD4
AD5
AD6
AD7
-
9
7
12
17
18
23
24
13
20
21
31
32
WR
R/W
CS
INT
AD0
AD1
10
-
Datasheet
9
INTEL [ INTEL ]
