XRT83L34IV(2004) Просмотр технического описания (PDF) - Exar Corporation

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производитель

XRT83L34IV
(Rev.:2004)

QUAD T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR

Exar Corporation 

XRT83L34

QUAD T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR

REV. P1.3.4

PRELIMINARY

SIGNAL NAME

RRING_0

RRING_1

RRING_2

RRING_3

RXMUTE

RDY_DTACK

RXRES0

RXRES1

PIN #

10

22

81

93

73

73

108

109

TYPE

I

I

O

I

DESCRIPTION

Receiver Differential Ring Negative Input for Channel _0

Negative differential receive input from the line.

Receiver Differential Ring Negative Input for Channel _1

Receiver Differential Ring Negative Input for Channel _2

Receiver Differential Ring Negative Input for Channel _3

Receive Muting - Hardware mode

Connecting this pin ‘High’ will mute (force to ground) the outputs RPOS_n/

RNEG_n when a LOS condition occurs, to prevent data chattering. This pin

is internally pulled "low" consequently muting is normally disabled.

NOTES:

1. Internally pulled "Low" with 50kΩ resistor.

2. In Hardware mode, all receive channels share the same RXMUTE

control function.

Ready Output (Data Transfer Acknowledge Output) - Host mode

See “Ready Output (Data Transfer Acknowledge Output) - Host Mode” on

page 9.

Receive External Resistor Control Pins - Hardware mode

Receive External Resistor Control Pin 0

Receive External Resistor Control Pin 1

These pins are used to determine the value of the external Receive fixed

resistor according to the following table:

RCLKE

µPTS1

RXRES1 RXRES0

Required Fixed External

RX Resistor

0

0

No External Fixed Resistor

0

1

1

0

1

1

240Ω

210Ω

150Ω

NOTE: These pins are internally pulled “Low” with 50kΩ resistor.

106

I

Receive Clock Edge - Hardware Mode

Set this pin "High" to sample RPOS_N/RNEG_n on the falling edge of

RCLK_n. With this pin tied "Low", output data are updated on the rising edge

of RCLK_n.

Microprocessor Type Select Input pin 1 - Host mode

This pin along with µPTS2 (pin 107) is used to select the microprocessor

type. See “Microprocessor Type Select Input Pins - Host Mode:” on page 10.

NOTE: This pin is internally pulled "Low" with a 50kΩ resistor.

6

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