XRT72L53 Datasheet, PDF (27/467 Pages) Exar Corporation – THREE CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

XRT72L53
THREE CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER
REV. P1.1.7
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PRELIMINARY
PIN DESCRIPTION CONNECTED PINS
PIN #
K18
K19
K20
L1
L3
L9
L10
L11
L12
L17
L18
L20
M1
M3
M9
M10
M11
M12
M17
M18
M19
M20
PIN NAME
D[4]
D[3]
D[2]
TxInClk[2]
RxPOS[2]
GND
GND
GND
GND
VDD
D[0]
D[1]
RxLineClk[2]
TxPOS[2]
GND
GND
GND
GND
A[7]
A[8]
A[9]
A[10]
TYPE
I/O
I/O
I/O
I
I
****
****
****
****
****
I/O
I/O
I
O
****
****
****
****
I
I
I
I
DESCRIPTION
Bi-Directional Data Bus pin:
See Description for Pin J19
Bi-Directional Data Bus pin:
See Description for Pin J19
Bi-Directional Data Bus pin:
See Description for Pin J19
Transmit Framer Reference Clock Input - Channel 2:
See Description for Pin G4
Receive Positive Data Input - Channel 2:
See Description for Pin F2
Ground
Ground
Ground
Ground
Power Supply +3.3v ± 5%
LSB of Bi-Directional Data Bus pins:
See Description for Pin J19
Bi-Directional Data Bus pin:
See Description for Pin J19
Receive (Recovered) LIU Clock signal - Channel 2:
See Description for Pin F1
Transmit Positive Polarity Data output - Channel 2:
See Description for Pin C1
Ground
Ground
Ground
Ground
Address Bus pin:
See Description for Pin M20
Address Bus pin:
See Description for Pin M20
Address Bus pin:
See Description for Pin M20
Address Bus Input (Microprocessor Interface) - MSB (Most Signifi-
cant Bit):
This input pin, along with inputs A0 - A9 are used to select the on-chip
Framer register and RAM space for READ/WRITE operations with the
local microprocessor.
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