DS21FT42 Maxim Integrated Products, DS21FT42 Datasheet - Page 99

• Manufacturer Part Number: DS21FT42
• Description: IC FRAMER T1 4X3 12CH 300-BGA
• Manufacturer: Maxim Integrated Products

Specifications of DS21FT42

• Controller Type: T1 Framer
• Interface: Parallel/Serial
• Voltage - Supply: 2.97 V ~ 3.63 V
• Current - Supply: 225mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 300-BGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

TRANSMIT SIDE 1.544 MHz BOUNDARY TIMING
(with elastic store enabled) Figure 23-11
TRANSMIT SIDE 2.048 MHz BOUNDARY TIMING
(with elastic store enabled) Figure 23-12
TCHBLK
TSYSCLK
TSYSCLK
TCHCLK
TCHCLK
TSSYNC
TCHBLK
TSSYNC
TSER
TSER
TSIG
TSIG
2,3
1
1
Notes:
1. TCHBLK is programmed to block channel 24 (if the TPCSI bit is set, then the signaling data at
TSIG will be ignored during channel 24).
Notes:
1. TSER data in channels 1, 5, 9, 13, 17, 21, 25, and 29 is ignored
2. TCHBLK is programmed to block channel 31 (if the TPCSI bit is set, then the signaling data at TSIG
will be ignored).
3. TCHBLK is forced to one in the same channels as TSER is ignored (see Note 1)
4. The F-bit position (MSB position of channel 1) for the T1 frame is sampled and passed through the
transmit side elastic store (normally the transmit side formatter overwrites the F-bit position unless the
formatter is programmed to pass-through the F-bit position)
CHANNEL 23
CHANNEL 23
A
CHANNEL 31
CHANNEL 31
B
A
C/A
B
LSB MSB
D/B
C/A
LSB MSB
D/B
CHANNEL 24
CHANNEL 24
CHANNEL 32
CHANNEL 32
A
B
A
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C/A
B
LSB
D/B
C/D
LSB
D/B
F
MSB
F 4
CHANNEL 1
CHANNEL 1
CHANNEL 1
CHANNEL 1
A