DS26324GNA3+ Maxim Integrated Products, DS26324GNA3+ Datasheet - Page 29

• Manufacturer Part Number: DS26324GNA3+
• Description: IC LIU E1/T1/J1 3.3V 256-CSBGA
• Manufacturer: Maxim Integrated Products
• Type: Line Interface Units (LIUs)r

Specifications of DS26324GNA3+

• Number Of Drivers/receivers: 16/16
• Protocol: LIN
• Voltage - Supply: 3.135 V ~ 3.465 V
• Mounting Type: Surface Mount
• Package / Case: 256-CSBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

5.5.6.1
Loss is detected if the received signal level is less than 200mV for duration of 192 bit periods. LOS is reset if the all
of the following criteria are met:
5.5.6.2
LOS is detected if the received signal level is less than 200mV for a continuous duration of 192 bit periods. LOS is
reset if the receive signal level is greater than 300mV for a duration of 192 bit periods.
5.5.6.3
LOS is detected if the received signal level is less than 200mV for a continuous duration of 2048 (1ms) bit periods.
LOS is reset if the receive signal level is greater than 300mV for a duration of 192 bit periods.
5.5.7
Table 5-7
The registers related to the AIS detection are shown in
Table 5-7. AIS Criteria ANSI T1.231, ITU-T G.775, and ETS 300 233 Specifications
AIS
Detection
Criteria
AIS
Clearance
Criteria
Table 5-8. AIS Detection and Reset Criteria for DS26324
AIS
Detection
Criteria
AIS
Clearance
Criteria
Table 5-9. Registers Related to AIS Detection
LOS/AIS Criteria Selection
Alarm Indication Signal Status
AIS Interrupt Enable
AIS Interrupt Status
5.5.8 Receive Dual-Rail Mode
Receive dual-rail mode consists of the RPOS, RNEG, and RCLK pins on the system side. In receive dual-rail
mode, B8ZS and HDB3 decoding is not available. The data that appears on the RTIP and RRING pins is output on
RPOS and RNEG without any modification. The Single-Rail Mode Select Register (SRMS) is used for selection of
CRITERIA
CRITERIA
•
•
•
AIS
ANSI T1.231 for T1 and J1 Modes
ITU-T G.775 for E1 Modes
ETS 300 233 for E1 Modes
outlines the DS26324 AIS related specifications.
REGISTER
24 or more ones are detected in 192-bit period with a detection threshold of 300mV measured
at RTIP and RRING.
During the 192 bits less than 100 consecutive zeros are detected.
8 consecutive zeros are not detected if B8ZS is set.
2 or fewer zeros in each of 2
consecutive 512-bit stream
received.
3 or more zeros in each of 2
consecutive 512-bit streams
received.
2 or fewer zeros in each of 2
consecutive 512-bit streams
received.
3 or more zeros in each of 2
consecutive 512-bit streams
received.
ITU-T G.775 for E1
ITU-T G.775 for E1
LASCS
NAME
AISIE
AISIS
AIS
DS26324 3.3V, 16-Channel, E1/T1/J1 Short-Haul Line Interface Unit
Fewer than 3 zeros detected in
512 bit period.
3 or more zeros in 512 bits
received.
Fewer than 3 zeros detected in
512-bit period.
3 or more zeros in 512 bits
received.
Section criteria for AIS (T1.231, G.775, ETS 300 233 for E1).
Set when AIS is detected.
If reset, interrupt due to AIS is not generated.
Latched if there is a change in AIS and the interrupt is enabled.
29 of 120
ETS 300 233 for E1
ETS 300 233 for E1
Table
STANDARD
STANDARD
Table 5-8
5-9.
states the AIS functionality in the DS26324.
FUNCTIONALITY
Fewer than 9 zeros detected in
a 8192-bit period (a ones
density of 99.9% over a period
of 5.3ms) are received.
9 or more zeros detected in a
8192-bit period are received.
Fewer than 9 zeros contained
in 8192 bits.
9 or more bits received in a
8192-bit stream.
ANSI T1.231 for T1
ANSI T1.231 for T1