DS26303L-120+ Maxim Integrated Products, DS26303L-120+ Datasheet - Page 74

• Manufacturer Part Number: DS26303L-120+
• Description: IC LIU E1/T1/J1 3.3V 144-ELQFP
• Manufacturer: Maxim Integrated Products
• Type: Line Interface Units (LIUs)r

Specifications of DS26303L-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: + 70 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DS26303: 3.3V, T1/E1/J1, Short-Haul, Octal Line Interface Unit
7.1.10 Select-IR-Scan
All test registers retain their previous state. The instruction register will remain unchanged during this state. With
JTMS LOW, a rising edge on TCLK moves the controller into the Capture-IR state and will initiate a scan sequence
for the instruction register. JTMS HIGH during a rising edge on TCLK puts the controller back into the Test-Logic-
Reset state.
7.1.11 Capture-IR
The Capture-IR state is used to load the shift register in the instruction register with a fixed value. This value is
loaded on the rising edge of TCLK. If JTMS is HIGH on the rising edge of TCLK, the controller will enter the Exit1-
IR state. If JTMS is LOW on the rising edge of TCLK, the controller will enter the Shift-IR state.
7.1.12 Shift-IR
In this state, the shift register in the instruction register is connected between JTDI and JTDO and shifts data one
stage for every rising edge of TCLK towards the serial output. The parallel registers as well as all test registers
remain at their previous states. A rising edge on TCLK with JTMS HIGH will move the controller to the Exit1-IR
state. A rising edge on TCLK with JTMS LOW will keep the controller in the Shift-IR state while moving data one
stage through the instruction shift register.
7.1.13 Exit1-IR
A rising edge on TCLK with JTMS LOW will put the controller in the Pause-IR state. If JTMS is HIGH on the rising
edge of TCLK, the controller will enter the Update-IR state and terminate the scanning process.
7.1.14 Pause-IR
Shifting of the instruction shift register is halted temporarily. With JTMS HIGH, a rising edge on TCLK will put the
controller in the Exit2-IR state. The controller will remain in the Pause-IR state if JTMS is LOW during a rising edge
on TCLK.
7.1.15 Exit2-IR
A rising edge on TCLK with JTMS HIGH will put the controller in the Update-IR state. The controller will loop back
to Shift-IR if JTMS is LOW during a rising edge of TCLK in this state.
7.1.16 Update-IR
The instruction code shifted into the instruction shift register is latched into the parallel output on the falling edge of
TCLK as the controller enters this state. Once latched, this instruction becomes the current instruction. A rising
edge on TCLK with JTMS LOW will put the controller in the Run-Test-Idle state. With JTMS HIGH, the controller
will enter the Select-DR-Scan state.
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