Maxim DS21Q55 specifications Receive Side Pins

Product Preview	DS21Q55
Signal Name:	TNEGIx
Signal Description:	Transmit Negative Data Input
Signal Type:	Input

Sampled on the falling edge of TCLKI for data to be transmitted out onto the T1 line. Can be internally connected to TNEGO by tying the LIUC pin high. TPOSI and TNEGI can be tied together in NRZ applications.

Signal Name:	TCLKIx
Signal Description:	Transmit Clock Input
Signal Type:	Input

Line interface transmit clock. Can be internally connected to TCLKO by tying the LIUC pin high.

3.2 Receive Side Pins

Signal Name:	RLINKx
Signal Description:	Receive Link Data
Signal Type:	Output

T1 Mode: Updated with either FDL data (ESF) or Fs bits (D4) or Z bits (ZBTSI) one RCLK before the start of a frame.

E1 Mode: Updated with the full E1 data stream on the rising edge of RCLK.

Signal Name:	RLCLKx
Signal Description:	Receive Link Clock
Signal Type:	Output
T1 Mode: A 4kHz or 2kHz (ZBTSI) clock for the RLINK output.
E1 Mode: A 4kHz to 20kHz clock.
Signal Name:	RCLKx
Signal Description:	Receive Clock
Signal Type:	Output

1.544MHz (T1) or 2.048MHz (E1) clock that is used to clock data through the receive-side framer.

Signal Name:	RCHCLKx
Signal Description:	Receive Channel Clock
Signal Type:	Output

A 192kHz (T1) or 256kHz (E1) clock that pulses high during the LSB of each channel can also be programmed to output a gated receive-bit clock for fractional T1/E1 applications. Synchronous with RCLK when the receive-side elastic store is disabled. Synchronous with RSYSCLK when the receive-side elastic store is enabled. Useful for parallel-to-serial conversion of channel data.

Signal Name:	RCHBLKx
Signal Description:	Receive Channel Block
Signal Type:	Output

A user-programmable output that can be forced high or low during any of the 24 T1 or 32 E1 channels. Synchronous with RCLK when the receive-side elastic store is disabled. Synchronous with RSYSCLK when the receive-side elastic store is enabled. Also useful for locating individual channels in drop-and-insert applications, for external per-channel loopback, and for per-channel conditioning. See Channel Blocking Registers.

Signal Name:	RSERx
Signal Description:	Receive Serial Data
Signal Type:	Output

Received NRZ serial data. Updated on rising edges of RCLK when the receive-side elastic store is disabled. Updated on the rising edges of RSYSCLK when the receive-side elastic store is enabled.

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