Pin descriptions, 1 pin functional description, Unctional – Rainbow Electronics DS26519 User Manual
Page 20: Escription, Table 8-1. detailed pin descriptions
DS26519 16-Port T1/E1/J1 Transceiver
20 of 310
8. PIN
DESCRIPTIONS
8.1
Pin Functional Description
Table 8-1. Detailed Pin Descriptions
NAME PIN
TYPE
FUNCTION
ANALOG TRANSMIT
TTIP1 C5,
D5
TTIP2 N4,
N5
TTIP3 T4,
T5
TTIP4 V3,
V4
TTIP5
W18, Y18
TTIP6 K18,
K19
TTIP7 G18,
G19
TTIP8 F18,
F19
TTIP9 V12,
W12
TTIP10 V13,
W13
TTIP11 V16,
W16
TTIP12 L18,
L19
TTIP13 D11,
E11
TTIP14 D10,
E10
TTIP15 D7,
E7
TTIP16 M4,
M5
Analog
Output,
High
Impedance
Transmit Bipolar Tip for Transceiver 1 to 16.
These pins are differential line
driver tip outputs. These pins can be high impedance if:
If TXENABLE is low, TTIPn/TRINGn will be high impedance. Note that if
TXENABLE is low, the register settings for control of TTIPn/TRINGn are ignored
and output is high impedance.
The differential outputs of TTIPn and TRINGn can provide internal matched
impedance for E1 75
Ω, E1 120Ω, T1 100Ω, or J1 110Ω. The user can turn off
internal termination.
Note:
The two pins shown for each transmit bipolar tip (e.g., pins C5 and D5 for
TTIP1) should be tied together.
TRING1 D6,
E6
TRING2 P4,
P5
TRING3 R4,
R5
TRING4 U4,
U5
TRING5 V17,
W17
TRING6 J18,
J19
TRING7 H18,
H19
TRING8 E19,
E20
TRING9 Y11,
Y12
TRING10 V14,
W14
TRING11 V15,
W15
TRING12 L20,
M20
TRING13 C11,
C12
TRING14 D9,
E9
TRING15 D8,
E8
TRING16 L3,
M3
Analog
Output,
High
Impedance
Transmit Bipolar Ring for Transceiver 1 to 16.
These pins are differential line
driver ring outputs. These pins can be high impedance if:
If TXENABLE is low, TTIPn/TRINGn will be high impedance. Note that if
TXENABLE is low, the register settings for control of TTIPn/TRINGn are ignored
and output is high impedance.
The differential outputs of TTIPn and TRINGn can provide internal matched
impedance for E1 75
Ω, E1 120Ω, T1 100Ω, or J1 110Ω. The user can turn off
internal termination.
Note:
The two pins shown for each transmit bipolar ring (e.g., pins D6 and E6
for TRING1) should be tied together.
TXENABLE U16 Input
Transmit Enable.
If this pin is pulled low, all transmitter outputs (TTIPn and
TRINGn) are high impedance. The register settings for tri-state control of
TTIPn/TRINGn are ignored if TXENABLE is low. If TXENABLE is high, the
particular driver can be tri-stated by the register settings.