DS26521L+ Maxim Integrated Products, DS26521L+ Datasheet - Page 36

• Manufacturer Part Number: DS26521L+
• Description: IC TXRX T1/E1/J1 64-LQFP
• Manufacturer: Maxim Integrated Products
• Type: Line Interface Units (LIUs)r

Specifications of DS26521L+

• Number Of Drivers/receivers: 1/1
• Protocol: T1/E1/J1
• Voltage - Supply: 3.135 V ~ 3.465 V
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Product: Framer
• Number Of Transceivers: 1
• Data Rate: 44.736 Mbps
• Supply Voltage (max): 3.465 V
• Supply Voltage (min): 3.135 V
• Supply Current (max): 220 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8.8.3 H.100 (CT Bus) Compatibility
The registers used for controlling the H.100 backplane are
The H.100 (or CT bus) is a synchronous, bit-serial, TDM transport bus operating at 8.192MHz. The H.100 standard
also allows compatibility modes to operate at 2.048MHz, 4.096MHz, or 8.192MHz. The control bit H100EN
(RIOCR.5), when combined with RSYNCINV and TSSYNCINV, allows the DS26521 to accept a CT bus-
compatible frame-sync signal (CT_FRAME) at the RSYNC and TSSYNCIO (input mode) inputs.
The following rules apply to the H100EN control bit.
Figure 8-12. RSYNC Input in H.100 (CT Bus) Mode
1) The H100EN bit controls the sampling point for the RSYNC (input mode) and TSSYNCIO (input mode)
2) The H100EN bit would always be used in conjunction with the receive and transmit elastic store buffers.
3) The H100EN bit would typically be used with 8.192MHz IBO mode, but could also be used with 4.096MHz
4) The H100EN bit in RIOCR controls both RSYNC and TSSYNCIO (i.e., there is no separate control bit for
5) The H100EN bit does not invert the expected signal; RSYNCINV (RIOCR) and TSSYNCINV (TIOCR) must
only. The RSYNC output and other sync signals are not affected.
IBO mode or 2.048MHz backplane operation.
the TSSYNCIO).
be set high to invert the inbound sync signals.
RSYSCLK
RSYNC
RSYNC
RSER
NOTE 1: RSYNC INPUT MODE IN NORMAL OPERATION.
NOTE 2: RSYNC INPUT MODE, H.100EN = 1 AND RSYNCINV = 1.
NOTE 3: t
2
1
BC
(BIT CELL TIME) = 122ns (typ). t
BIT 8
BC
= 244ns or 488ns ALSO ACCEPTABLE.
t
BIT 1
BC
36 of 258
3
RIOCR
and TIOCR.
BIT 2
DS26521 Single T1/E1/J1 Transceiver