DS26303LN-120+ Maxim Integrated Products, DS26303LN-120+ Datasheet - Page 20

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

DS26303LN-120+

Manufacturer Part Number
DS26303LN-120+
Description
IC LIU E1/T1/J1 3.3V 144-ELQFP
Manufacturer
Maxim Integrated Products
Type
Line Interface Units (LIUs)r
Datasheet

Specifications of DS26303LN-120+

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
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
4.1 Hardware and Host Port Operation
4.1.1 Hardware Mode
The DS26303 supports a hardware configuration mode that allows the user to configure the device through setting
levels on the device’s pins. This mode allows the configuration of the DS26303 without the use of a
microprocessor. Not all of the device features are supported in the hardware mode. To see all available options for
this hardware mode, see the pin descriptions in
Table 4-2
Table 4-2. Hardware Mode Configuration Examples
HARDWARE
PIN NAME,
RRING[8:1]
TRING[8:1]
RNEG[8:1]
MODESEL
TNEG[8:1]
RPOS[8:1]
TPOS[8:1]
RCLK[8:1]
RLOS[8:1]
TCLK[8:1]
RIMPOFF
RTIP[8:1]
GMC[3:0]
TTIP[8:1]
RIMPMS
TIMPRM
JTRSTB
TS[2:0]
LP[8:1]
JTCLK
PIN 94
MODE
CODE
MCLK
CLKE
JTMS
JTDO
RSTB
CLKA
INTB
JTDI
JAS
OE
provides two basic examples of configurations available in hardware mode by setting pins.
N.C.: Pulled to V
N.C.: Pulled to V
Output: 1.544MHz
Input: 1.544MHz
Input: 1.544MHz
Input, Pulled Up
Input, Pulled Up
Output, High-Z
Input, Pullup
STANDARD MODE CONFIGURATION
Output
Output
Output
Output
Output
Input
Input
Input
Input
0000
Input
Input
N.C.
N.C.
N.C.
111
T1
0
0
1
0
0
1
0
DDIO
DDIO
/2
/2
Table
(Part number ends in -75)
N.C.: Pulled to V
N.C.: Pulled to V
Output: 2.048MHz
DS26303: 3.3V, T1/E1/J1, Short-Haul, Octal Line Interface Unit
Input: 2.048MHz
Input: 2.048MHz
20 of 101
Input, Pulled Up
Input, Pulled Up
Output, High-Z
4-1.
Input, Pullup
Output
Output
Output
Output
Output
Input
Input
Input
Input
0000
Input
Input
N.C.
N.C.
N.C.
000
E1
0
0
1
0
0
1
0
DDIO
DDIO
/2
/2
Used as recovery clock.
Meets T1.231 and ITU-T G.775.
Low for hardware mode.
100Ω for T1 mode/75Ω E1 mode.
AMI encoding/decoding.
Jitter attenuator is not used.
Set template T1 (655ft)-100Ω/E1-75Ω.
Receive impedance should default to
on.
Not used in hardware mode.
Internally pulled to V
Internal impedance mode selected.
No monitoring enabled.
All TTIPn and TRINGn outputs are
enabled.
RPOSn/RNEGn are clocked on rising
edge.
JTAG.
Reset.
Not available in hardware node.
NOTES
DDIO
/2.

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