XRT56L85 Datasheet, PDF (2/12 Pages) Exar Corporation – Low Power PCM Line Interface

XRT56L85
PIN CONFIGURATION
PDC 1
RXDATA+ 2
RXDATA- ³
TE 4
BIAS 5
TANK BIAS ⁶
RXGND 7
RCLK 8
RXV_CC 9
18 TXV_CC
17 TPOS
16 _TCLK
15 TXDATA+
14 TXGND
13 _TXDATA-
12 TNEG
11 RPOS
10 RNEG
18 Lead PDIP (0.300”)
PDC
RXDATA+
RXDATA-
TE
BIAS
TANK BIAS
RXGND
RCLK
RXV_CC
1
18
2
17
3
16
4
15
5
14
6
13
7
12
8
11
9
10
TXV_CC
TPOS
TCLK
TXDATA+
TXGND
TXDATA-
TNEG
RPOS
RNEG
18 Lead SOIC (Jedec, 0.300”)
PIN DESCRIPTION
Pin #
1
Symbol
PDC
2
RXDATA+
3
RXDATA-
4
TE
5
BIAS
6 TANK BIAS
7
RXGND
8
RCLK
9
RXV_CC
10
RNEG
11
RPOS
12
TNEG
13
TXDATA-
14
TXGND
15
TXDATA+
16
TCLK
17
TPOS
18
TXVcc
Type
I
I
O
O
O
O
O
I
O
O
I
I
Description
Peak Detector Capacitor. This pin should be connected to a 0.1µF capacitor
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.
Receive Analog Input Negative. See the description for RX DATA(+).
LC Tank Excitation Output. This output connects to one side of the tank circuitry.
Bias. This pin should be tied to ground through a 0.1µF capacitor.
Tank Reference. The tank circuitry is biased via this output.
Receiver Ground. To minimize ground interference a separate pin is used to ground the re-
ceiver section.
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.
Receive Supply Voltage. 5V supply voltage for the Receive Section.
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.
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.
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.
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.
Transmit Ground.
Transmit Positive Data Output. Please see description for TX DATA(-).
Transmit Clock. TPOS and TNEG are sampled on the rising edge of TCLK.
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.
Transmit Supply Voltage. 5V supply voltage to the transmit section.
Rev. 2.11
2