DS21Q55 Maxim Integrated Products, DS21Q55 Datasheet - Page 213

• 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 31-13. Receive-Side Boundary Timing, RSYSCLK = 1.544MHz (Elastic
Store Enabled)
Note 1: Data from the E1 channels 1, 5, 9, 13, 17, 21, 25, and 29 is dropped (channel 2 from the E1 link is mapped to channel 1 of the T1 link,
Note 2: RSYNC in the output mode (IOCR1.4 = 0).
Note 3: RSYNC in the input mode (IOCR1.4 = 1).
Note 4: RCHBLK is programmed to block channel 24.
Figure 31-14. Receive-Side Boundary Timing, RSYSCLK = 2.048MHz (Elastic
Store Enabled)
Note 1: RSYNC is in the output mode (IOCR1.4 = 0).
Note 2: RSYNC is in the input mode (IOCR1.4 = 1).
Note 3: RCHBLK is programmed to block channel 1.
Note 4: RSIG normally contains the CAS multiframe alignment nibble (0000) in channel 1.
etc.) and the F-bit position is added (forced to on 1).
RCHBLK
RSYSCLK
RSYSCLK
RCHBLK
RMSYNC
RCHCLK
RMSYNC
RSYNC
RSYNC
RCHCLK
RSYNC
RSYNC
RSER
RSER
RSIG
3
1
2
4
2
1
3
CHANNEL 23/31
CHANNEL 31
A
CHANNEL 31
B
LSB
C
MSB
LSB MSB
D
213 of 237
CHANNEL 24/32
CHANNEL 32
A
CHANNEL 32
B
LSB
C
F
LSB MSB
D
MSB
CHANNEL 1/2
CHANNEL 1
CHANNEL 1
Note 4