DS21Q55 Maxim Integrated Products, DS21Q55 Datasheet - Page 212

• Manufacturer Part Number: DS21Q55
• Description: IC TXRX QUAD T1/E1/J1 SCT 256BGA
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q55

• Function: Transceiver
• Interface: E1, J1, T1
• Number Of Circuits: 4
• Voltage - Supply: 3.14 V ~ 3.47 V
• Current - Supply: 75mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 256-BGA
• Includes: BERT Generator and Detector, Dual HDLC Controllers
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power (watts): -

31.2 E1 Mode
Figure 31-11. Receive-Side Timing
Note 1: RSYNC in frame mode (IOCR1.5 = 0).
Note 2: RSYNC in multiframe mode (IOCR1.5 = 1).
Note 3: RLCLK is programmed to output just the Sa bits.
Note 4: RLINK always outputs all five Sa bits as well as the rest of the receive data stream.
Note 5: This diagram assumes the CAS MF begins in the RAF frame.
Figure 31-12. Receive-Side Boundary Timing (with Elastic Store Disabled)
Note 1: RCHBLK is programmed to block channel 1.
Note 2: RLCLK is programmed to mark the Sa4 bit in RLINK.
Note 3: Shown is a RNAF frame boundary.
Note 4: RSIG normally contains the CAS multiframe alignment nibble (0000) in channel 1.
RFSYNC
RSYNC
RSYNC
RLCLK
FRAME#
RLINK
RCHBLK
RFSYNC
RCHCLK
RSYNC
RLINK
RLCLK
RSER
RCLK
RSIG
2
4
3
1
1
2
1
CHANNEL 32
CHANNEL 32
2
A
3
B
4
C
LSB
D
5
Si
6
1
7
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A Sa4 Sa5 Sa6 Sa7 Sa8
8
Sa4 Sa5 Sa6 Sa7 Sa8
CHANNEL 1
CHANNEL 1
9
Note 4
10
11
12
MSB
13
14
CHANNEL 2
CHANNEL 2
15
A
16
B
1