DS26303L-75+ Maxim Integrated Products, DS26303L-75+ Datasheet - Page 35

IC LIU E1/T1/J1 3.3V 144-ELQFP

DS26303L-75+

Manufacturer Part Number
DS26303L-75+
Description
IC LIU E1/T1/J1 3.3V 144-ELQFP
Manufacturer
Maxim Integrated Products
Type
Line Interface Units (LIUs)r
Datasheet

Specifications of DS26303L-75+

Number Of Drivers/receivers
8/8
Protocol
T1/E1/J1
Voltage - Supply
3.135 V ~ 3.465 V
Mounting Type
Surface Mount
Package / Case
144-LQFP Exposed Pad, 144-eLQFP, 144-HLQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 2 to 0: TST Template Select Transceiver [2:0] (TST [2:0]). TST[2:0] is used to select the transceiver that the
transmit template select register (hex 11) applies to. See
Table 5-10. TST Template Select Transceiver Register
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit 7: Receive Impedance Match Off (RIMPOFF). If this bit is set, all the receive impedance match is turned off.
Bit 6: Transmit Impedance Termination Off (TIMPOFF). If this bit is set, all the internal transmit terminating
impedance is turned off.
Bit 3: Transmit Impedance Receive Match (TIMPRM). This bit selects the internal transmit termination
impedance and receive impedance match for E1 mode and T1/J1 mode. Note: If the part number ends with –120,
then the default is 120Ω and 75Ω when set for El mode only.
DS26303L-120
DS26303L-120
DS26303L-75
DS26303L-75
Bits 2 to 0: Template Selection [2:0] (TS[2:0]). Bits TS[2:0] are used to select E1 or T1/J1 mode, the template,
and the settings for various cable lengths. The impedance termination for the transmitter and impedance match for
the receiver are specified by bit TIMPRM. See
Table 5-11. Template Selection
1
001 and 010
See TIMPRM bit in SWM or TIMPRM pin in HWM for transmit impedance and receive match selection.
TST[2:0]
TS[2:0]
DEVICE
011
100
101
110
111
000
000
001
010
011
RIMPOFF
7
0
7
0
133–266ft. ABAM
266–399ft. ABAM
399–533ft. ABAM
533–655ft. ABAM
CHANNEL
LINE LENGTH
0–133ft. ABAM
G.703 coaxial and twisted pair cable
BIT SETTING
Reserved
1
2
3
4
TIMPOFF
0
1
0
1
6
0
6
0
TST
Template Select Transceiver Register
10h
TS
Template Select Register
11h
TST[2:0]
100
101
110
111
E1 MODE (Ω)
5
0
5
CABLE LOSS
120
120
75
75
Table 5-11
(dB)
0.6
1.2
1.8
2.4
3.0
DS26303: 3.3V, T1/E1/J1, Short-Haul, Octal Line Interface Unit
35 of 101
CHANNEL
4
0
4
Table
for bit selection of TS[2:0].
5
6
7
8
T1 MODE (Ω)
IMPEDANCE (Ω)
5-10.
TIMPRM
100
110
100
110
100/110
100/110
100/110
100/110
100/110
3
0
3
0
75/120
TST2
TS2
1
2
0
2
0
OPERATION MODE
TST1
TS1
T1/J1
1
0
1
0
T1
T1
T1
T1
E1
TST0
TS0
0
0
0
0

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