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| CN8380 Datasheet, PDF (88/91 Pages) Conexant Systems, Inc – integrated quad line interface unit unit for both 1.544 Mbps (T1) and 2.048 Mbps (E1) applications | |||
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BFigure B-1. Minimum Hardware Configuration
CN8394
Quad T1/E1
Framer
VDD
Hardware Mode
Host Mode
Channel 1 Digital
Interface
65
NC 48
NC 43
NC 44
NC 45
NC 46
NC 114
NC 49
NC 62
NC 63
NC 64
NC 50
NC 47
NC 53
34
33
35
HM
RESET
JDIR(4)
JSEL(2)(4)
JSEL(1)(4)
JSEL(0)
UNIPOLAR
HTERM
PTS(2)
PTS(1)
PTS(0)
CLK_POL
IRQ
ZCS
RPOSO[1]
RNEGO[1]
RCKO[1]
NC 123
NC 119
NC 73
NC 42
NC 108
NC 115
RLOOP[1]
LLOOP[1]
RAWMD[1]
JATERR[1]*
RLOS[1]
TAIS[1]
37 TPOSI[1]
36 TNEGI[1]
38 TCLK[1]
Channel 1 Line Interface
Programmable
Receive Termination (1)
RTIP[1] 71 470
Fixed Receive
Termination (2)
100
RRING[1] 72 470
0.1
1:2
66
XOE[1]
XTIP[1] 67
150 pF
21
XRING[1] 68
1:2
5.6(5)
5.6(5)
Smoothing
Capacitor
Fixed
Transmit
Termination (3)
Octal Transformer
Pulse â T1124
Channel 2 Digital Interface
CN8380
Quad T1/E1
LIU
Channel 2 Line Interface
Channel 3 Line Interface
RX
Optional
Common
Mode Choke
RX
RJ48C
or
BANTAM
TX
TX
Channel 3 Digital Interface
Channel 4 Digital Interface
VDD
VAA
VAAT[1:4]
VAAR
VAACL
VGG
10 MHz
Oscillator
42
44
43
45
NC 1
4
127
128
SDO(4)
SDI(4) Host Mode
SCLK(4) Serial Port
CS(4)
CLADI
REFCKI
EACKI
TACKI
VSS
GND
GNDT[1:4]
GNDR
GNDCL
+3.3 V
Channel 4 Line Interface
Note(s):
(1) Optional programmable receive termination: 75/100/120 â¦
(2) Required fixed receive termination. The parallel combination of the fixed termination and programmable termination must match the line impedance.
(3) Optional fixed transmit termination. The value shown provides acceptable transmit return loss for T1 and E1 applications. (See Table 2-7, Transmit Termination Option D.)
(4) Pins shown twice for Hardware Mode and Host Mode.
(5) In Hardware Mode, 5.6 ⦠line feed resistors are required. In Host Mode, they are optional.
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