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XRT56L85D Datasheet(PDF) 2 Page - Exar Corporation

Part # XRT56L85D
Description  Low Power PCM Line Interface
Download  12 Pages
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT56L85D Datasheet(HTML) 2 Page - Exar Corporation

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XRT56L85
2
Rev. 2.11
PIN CONFIGURATION
18
1
10
9
2
3
4
5
6
7
15
14
13
12
11
17
16
8
TXVCC
TPOS
TCLK
TXDATA+
TXGND
TXDATA-
TNEG
RPOS
PDC
RXDATA+
RXDATA-
TE
BIAS
TANK BIAS
RXGND
RCLK
RNEG
RXVCC
18 Lead PDIP (0.300”)
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
TXVCC
TPOS
TCLK
TXDATA+
PDC
RXDATA+
RXDATA-
TE
TXGND
TXDATA-
TNEG
RPOS
BIAS
TANK BIAS
RXGND
RCLK
RNEG
RXVCC
18 Lead SOIC (Jedec, 0.300”)
PIN DESCRIPTION
Pin #
Symbol
Type
Description
1
PDC
Peak Detector Capacitor.
This pin should be connected to a 0.1µF capacitor
2
RXDATA+
I
Receive Analog Input Positive.
The AMI signal received from the line is applied at this and
the RX DATA(-) pin. Data and clock from the signal applied at these two pins recovered and
output on the RPOS, RNEG, and RCLK pins, respectively.
3
RXDATA-
I
Receive Analog Input Negative.
See the description for RX DATA(+).
4
TE
O
LC Tank Excitation Output.
This output connects to one side of the tank circuitry.
5
BIAS
O
Bias.
This pin should be tied to ground through a 0.1µF capacitor.
6
TANK BIAS
Tank Reference.
The tank circuitry is biased via this output.
7
RXGND
Receiver Ground.
To minimize ground interference a separate pin is used to ground the re-
ceiver section.
8
RCLK
O
Recovered Receive Clock.
Recovered clock signal from the AMI signal received at the RX
DATA(+) and RX DATA(-) pins. This signal is output to the terminal equipment.
9
RXVCC
Receive Supply Voltage.
5V supply voltage for the Receive Section.
10
RNEG
O
Receive Negative Data Output.
A signal at this pin corresponds to the receipt of a negative
pulse on the RX DATA(+)/RX DATA(-) pins. This TTL compatible signal is output to the
terminal equipment.
11
RPOS
O
Receive Positive Data Output.
A signal at this pin corresponds to the receipt of a positive
pulse on the RX DATA(+)/RX DATA pins. This TTL compatible signal is outputed to the
terminal equipment.
12
TNEG
I
Transmit Negative Data Input.
TTL input for a negative polarity pulse (the negative portion
of the AMI pulse train) to be transmitted to the line via the TX DATA(+) and TX DATA pins.
13
TXDATA-
O
Transmit Negative Data Output.
This pin, along with the TX DATA(+) pin, forms a differential
driver output, this is used to drive AMI data down the line via a transformer. Note: This is an
open-collector output.
14
TXGND
Transmit Ground.
15
TXDATA+
O
Transmit Positive Data Output.
Please see description for TX DATA(-).
16
TCLK
I
Transmit Clock.
TPOS and TNEG are sampled on the rising edge of TCLK.
17
TPOS
I
Transmit Positive Data Input.
TTL input for a positive polarity pulse (the positive portion of
the AMI pulse train) to be transmitted to the line via the TX DATA(+) and TX DATA(-) pins.
18
TXVcc
Transmit Supply Voltage.
5V supply voltage to the transmit section.


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