DS21448L+ Maxim Integrated Products, DS21448L+ Datasheet - Page 25

• Manufacturer Part Number: DS21448L+
• Description: IC LIU QUAD E1/T1/J1 128-LQFP
• Manufacturer: Maxim Integrated Products
• Type: Line Interface Units (LIUs)r

Specifications of DS21448L+

• Number Of Drivers/receivers: 4/4
• Protocol: T1/E1/J1
• Voltage - Supply: 3.135 V ~ 3.465 V
• Mounting Type: Surface Mount
• Package / Case: 128-TQFP, 128-VQFP
• Product: Framer
• Number Of Transceivers: 4
• Supply Voltage (max): 3.465 V
• Supply Voltage (min): 3.135 V
• Supply Current (max): 400 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 5-A. Received Alarm Criteria
Note 1: RCL is also known as a loss of signal (LOS) or Red Alarm in T1.
Note 2: See CCR1.5 for details.
IMR (07H): Interrupt Mask Register
ALARM
(Note 1)
(Note 1)
PRBSD
(MSB)
NAME
RUA1
RUA1
TOCD
LOTC
RUA1
TCLE
RCL
RCL
LUP
LUP
LDN
RCL
E1/T1
E1
E1
POSITION
T1
T1
IMR.7
IMR.6
IMR.5
IMR.4
IMR.3
IMR.2
IMR.1
IMR.0
LDN
Fewer than two 0s in two frames (512 bits)
Over a 3ms window, five or fewer 0s are
received.
255 (or 2048) consecutive 0s received
(G.775) (Note 2)
192 (or 1544) consecutive 0s are received
(Note 2)
Loop-Up Code Detected
0 = interrupt masked
1 = interrupt enabled
Loop-Down Code Detected
0 = interrupt masked
1 = interrupt enabled
Loss-of-Transmit Clock
0 = interrupt masked
1 = interrupt enabled
Receive Unframed All Ones
0 = interrupt masked
1 = interrupt enabled
Receive Carrier Loss
0 = interrupt masked
1 = interrupt enabled
Transmit Current-Limiter Exceeded
0 = interrupt masked
1 = interrupt enabled
Transmit Open-Circuit Detect
0 = interrupt masked
1 = interrupt enabled
PRBS Detection
0 = interrupt masked
1 = interrupt enabled
LOTC
SET CRITERIA
RUA1
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RCL
FUNCTION
More than two 0s in two frames (512 bits)
Over a 3ms window, six or more 0s are
received.
In 255-bit times, at least 32 1s are
received.
14 or more 1s out of 112 possible bit
positions are received, starting with the
first 1 received.
TCLE
CLEAR CRITERIA
TOCD
PRBSD
(LSB)