DS21Q55 Maxim Integrated Products, DS21Q55 Datasheet - Page 209

• 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): -

Figure 31-5. Receive-Side 2.048MHz Boundary Timing (with Elastic Store
Enabled)
Note 1: RSER data in channels 1, 5, 9, 13, 17, 21, 25, and 29 are forced to 1.
Note 2: RSYNC is in the output mode (IOCR1.4 = 0).
Note 3: RSYNC is in the input mode (IOCR1.4 = 1).
Note 4: RCHBLK is forced to 1 in the same channels as RSER (see Note 1).
Note 5: The F-bit position is passed through the receive-side elastic store.
Figure 31-6. Transmit-Side D4 Timing
Note 1: TSYNC in the frame mode (IOCR1.2 = 0) and double-wide frame sync is not enabled (IOCR1.1 = 0).
Note 2: TSYNC in the frame mode (IOCR1.2 = 0) and double-wide frame sync is enabled (IOCR1.1 = 1).
Note 3: TSYNC in the multiframe mode (IOCR1.2 = 1).
Note 4: TLINK data (Fs bits) is sampled during the F-bit position of even frames for insertion into the outgoing T1 stream when enabled through
FRAME#
TSSYNC
TSYNC
TSYNC
TSYNC
TLINK
TLCLK
T1TCR1.2.
RCHBLK
RSYSCLK
RMSYNC
RCHCLK
RSYNC
RSYNC
RSER
RSIG
2
3
4
1
3
2
4
1
1
2
CHANNEL 31
3
A
CHANNEL 31
4
B
5
C/A D/B
LSB MSB
6
7
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8
CHANNEL 32
9
10
A
CHANNEL 32
11
B
C/A D/B
12
LSB
1
2
CHANNEL 1
3
CHANNEL 1
4
5