bt8375kpf Conexant Systems, Inc., bt8375kpf Datasheet - Page 103

• Manufacturer Part Number: bt8375kpf
• Description: Single Chip Transceivers For T1/e1 And Integrated Service Digital Network Isdn Primary Rate Interfaces Systems
• Manufacturer: Conexant Systems, Inc.

Bt8370/8375/8376
Fully Integrated T1/E1 Framer and Line Interface
Table 2-23. Transmit Pulse
N8370DSE
Tx Series
Resistance
VSET ( )
Tx Termination
( )
NOTE(S):
Rterm
PTC
LH refers to Long Haul, and SH refers to Short Haul.
75
100
120
VPk
LH =
2.96
14 k
51.1
also controls the height of the transmit pulse. The VSET value can be fine tuned
according to the total resistance on the line side.
Peak value of the transmit pulse. (Please refer to
recommended front-end circuitry.)
No
No
The minimum series resistance required with XTIP/XRING is 2.1
2.1
the part against surge voltages of up to 50 V (please refer to Section 4,
Applications). The line side protection circuitry should break down the voltage to
50 V so that the chip side protection circuitry (two 2.1
Shottky diodes) can protect the part for surge voltages of 50 V or below.
2.36
2.96
The VSET resistor not only provides a bias current to RPLL and TPLL but
SH =
3.16
series resistors, together with the Shottky diodes, are necessary to protect
LH =
2.96
2.1
with XTIP and
XRING
Conexant
2.36
2.96
14 k
51.1
No
in series
SH =
3.12
LH =
2.88
2.1
with XTIP and
XRING
2.30
2.90
51.1
14 k
One
in series
SH =
3.00
Table 2-23
LH =
2.80
2.1
with XTIP and
XRING
Figures 4-1
2.28
2.84
51.1
Two
14 k
2.9 Transmit Line Interface Unit
in series
SH =
3.04
series resistors with
2.0 Circuit Description
shows the measured
through
. The two
4-4
for the
2-75