Datasheet

DS26303: 3.3V, T1/E1/J1, Short-Haul, Octal Line Interface Unit
11 of 101
4 PIN DESCRIPTION
Table 4-1. Pin Descriptions
NAME PIN TYPE FUNCTION
ANALOG TRANSMIT AND RECEIVE
TTIP1 45
TTIP2 52
TTIP3 57
TTIP4 64
TTIP5 117
TTIP6 124
TTIP7 129
TTIP8 136
Analog
Output
Transmit Bipolar Tip for Channel 1 to 8. These pins are
differential line-driver tip outputs. These pins will be high
impedance if pin OE is low or the corresponding
OEB.OEBn bit is
high. If the corresponding clock TCLKn is low for 64 MCLKs, the
corresponding transmitter is put in power-down mode. The
differential outputs of TTIPn and TRINGn can provide internal
matched impedance for E1 75Ω, E1 120Ω, T1 100Ω, or J1 110Ω.
TRING1 46
TRING2 51
TRING3 58
TRING4 63
TRING5 118
TRING6 123
TRING7 130
TRING8 135
Analog
Output
Transmit Bipolar Ring for Channel 1 to 8. These pins are
differential line-driver ring outputs. These pins will be high
impedance if pin OE is low or the corresponding
OEB.OEBn bit is
high. If the corresponding clock TCLKn is low for 64 MCLKs, the
corresponding transmitter is put in power-down mode. The
differential outputs of TTIPn and TRINGn can provide internal
matched impedance for E1 75Ω, E1 120Ω, T1 100Ω, or J1 110Ω.
RTIP1 48
RTIP2 55
RTIP3 60
RTIP4 67
RTIP5 120
RTIP6 127
RTIP7 132
RTIP8 139
Analog
Input
Receive Bipolar Tip for Channel 1 to 8. Receive analog input for
differential receiver. Data and clock are recovered and output at
RPOSn/RNEGn and RCLKn pins, respectively. The differential
inputs of RTIPn and RRINGn can provide internal matched
impedance for E1 75Ω, E1 120Ω, T1 100Ω, or J1 110Ω.
RRING1 49
RRING2 54
RRING3 61
RRING4 66
RRING5 121
RRING6 126
RRING7 133
RRING8 138
Analog
Input
Receive Bipolar Ring for Channel 1 to 8. Receive analog input
for differential receiver. Data and clock are recovered and output
at RPOSn/RNEGn and RCLKn pins, respectively. The differential
inputs of RTIPn and RRINGn can provide internal matched
impedance for E1 75Ω, E1 120Ω, T1 100Ω, or J1 110Ω.