DS21FF44 Maxim Integrated Products, DS21FF44 Datasheet - Page 94

• Manufacturer Part Number: DS21FF44
• Description: IC FRAMER E1 4X4 16CH 300-BGA
• Manufacturer: Maxim Integrated Products

Specifications of DS21FF44

• Controller Type: E1 Framer
• Interface: Parallel/Serial
• Voltage - Supply: 2.97 V ~ 3.63 V
• Current - Supply: 300mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 300-BGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Figure 22-3. RECEIVE SIDE 1.544MHz BOUNDARY TIMING (With Elastic
Store Enabled)
RSYNC / RMSYNC
Figure 22-4. RECEIVE SIDE 2.048MHz BOUNDARY TIMING (With Elastic
Store Enabled)
RSYNC / RMSYNC
1
RSYSCLK
2
RSYSCLK
RCHCLK
RCHBLK
RCHCLK
RCHBLK
RSYNC
RSYNC
RSER
RSIG
RSER
2
3
1
3
4
Notes:
1. RSYNC is in the output mode (RCR1.5 = 0)
2. RSYNC is in the input mode (RCR1.5 = 1)
3. RCHBLK is programmed to block channel 1
4. RSIG normally contains the CAS multiframe alignment nibble (0000) in Channel 1
Notes:
1. Data from the E1 channels 1, 5, 9, 13, 17, 21, 25, and 29 is dropped (channel 2 from the E1 link is
2. RSYNC is in the output mode (RCR1.5 = 0)
3. RSYNC is in the input mode (RCR1.5 = 1)
4. RCHBLK is programmed to block channel 24
mapped to channel 1 of the T1 link, etc.) and the F-bit position is added (forced to one)
CHANNEL 23/31
CHANNEL 31
CHANNEL 31
A
B
C
LSB MSB
LSB
D
MSB
CHANNEL 24/32
94 of 117
CHANNEL 32
CHANNEL 32
A
B
C
LSB
LSB
D
F
MSB
MSB
CHANNEL 1/2
CHANNEL 1
CHANNEL 1
Note 4