REV. 1.0.1 K5 TxA_PL O CMOS Transmit STS-3/STM-1 Telecom Bus Interface - Payload Da" />
參數(shù)資料
型號： XRT94L31IB-L
廠商： Exar Corporation
文件頁數(shù)： 44/133頁
文件大小： 0K
描述： IC MAPPER DS3/E3/STS-1 504TBGA
標準包裝： 24
應用： 網(wǎng)絡切換
接口： 總線
電源電壓： 3.14 V ~ 3.47 V
封裝/外殼： 504-LBGA
供應商設備封裝： 504-TBGA（35x35）
包裝： 托盤
安裝類型： 表面貼裝
XRT94L31
18
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC
REV. 1.0.1
K5
TxA_PL
O
CMOS
Transmit STS-3/STM-1 Telecom Bus Interface - Payload Data Indica-
tor Output Signal:
This output pin indicates whether or not the Transmit STS-3/STM-1 Tele-
com Bus Interface is currently placing a Transport Overhead byte or a
non-Transport Overhead Byte (e.g., STS-1 SPE, STS-3c SPE, VC-3 or
VC-4 data) via the TXA_D[7:0] output pins.
This output pin is pulled "Low" for the duration that the Transmit STS-3/
STM-1 Telecom Bus Interface is transmitting a Transport Overhead byte
via the TXA_D[7:0] output pins.
Conversely, this output pin is pulled "High" for the duration that the
Transmit STS-3/STM-1 Telecom Bus Interface is transmitting something
other than a Transport Overhead byte via the TXA_D[7:0] output pins.
J4
G3
D1
F3
J5
H4
D2
E3
TxA_D0
TxA_D1
TxA_D2
TxA_D3
TxA_D4
TxA_D5
TxA_D6
TxA_D7
O
CMOS
Transmit STS-3/STM-1 Telecom Bus Interface - Transmit Output
Data Bus pins:
These 8 output pins function as the Transmit STS-3/STM-1 Telecom Bus
Interface - Output data bus. If the STS-3/STM-1 Telecom Bus Interface
is enabled, then all outbound STS-3/STM-1 data is output via these pins
(in a byte-wide manner), upon the rising edge of the TXA_CLK output
pin.
STS-3/STM-1 TELECOM BUS INTERFACE - RECEIVE DIRECTION
W2
RxD_CLK
I
TTL
Receive STS-3/STM-1 Telecom Bus Interface - Clock Input Signal:
This input clock signal functions as the clock source for the Receive
STS-3/STM-1 Telecom Bus Interface. All input signals are sampled
upon the falling edge of this input clock signal.
This clock signal should operate at 19.44MHz.Note:
NOTE: This input pin is only used if the STS-3/STM-1 Telecom Bus has
been enabled. It should be connected to GND otherwise.
AA3
RxD_PL
I
TTL
Receive STS-3/STM-1 Telecom Bus Interface - Payload Data Indica-
tor Output Signal:
This input pin indicates whether or not the Receive STS-3/STM-1 Tele-
com Bus Interface is currently receiving Transport Overhead bytes or
non-Transport Overhead bytes (e.g., STS-1 SPE, STS-3c SPE,VC-3 or
VC-4 data) via the RXD_D[7:0] input pins.
This input pin should be pulled "Low" for the duration that the Receive
STS-3/STM-1 Telecom Bus Interface is receiving a Transport Overhead
byte via the RXD_D[7:0] input pins.
Conversely, this input pin should be pulled "High" for the duration that
the Receive STS-3/STM-1 Telecom Bus Interface is receiving something
other than a Transport Overhead byte via the RXD_D[7:0] input pins.
NOTE: Connect this pin to GND if the STS-3/STM-1 Telecom Bus is NOT
enabled
PIN DESCRIPTION OF THE XRT94L31 (REV. B)
PIN #
SIGNAL NAME
I/O
TYPE
DESCRIPTION
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