AK2540 Datasheet, PDF (7/33 Pages) Asahi Kasei Microsystems – Quad T1 Transceiver

ASAHI KASEI
[AK2540]
PIN DESCRIPTIONS
Pin Name I/O
T1 Transceiver
TTIP1-4
O
TRING1-4
O
TPOS1-4
I
TNEG1-4
I
TCLK1-4
I
RTIP1-4
I
RRING1-4
I
RPOS1-4
O
RNEG1-4
O
RCLK1-4
O
RLOOP1-4
I
LLOOP1-4
I
LENG01-04 I
LENG11-14 I
LENG21-24 I
AIS1-4
I
AIS1SEL
I
JASELR
I
JASELT
I
DFM1-4
O
LOS1-4
O
TVDD1-4
TVSS1-4
AVSS1-4
Common Block
MCLK
I
LOMC
O
AS(ALE)
I
INT
O
DS(RD)
I
R/W (WR)
I
Function
Comments
Transmit Tip/Ring Output pins
Bipolar output over transmit transformer
Transmit Positive/Negative Data Input pins
Input on the falling edge of TCLK
Transmit Clock Input pins
Receive Tip/Ring Input pins
Bipolar Input over receive transformer
Receive Positive/Negative Data Output pins
Output on the rising/falling edge of RCLK
(determined by CLKE pin)
Receive Clock Output recovered from receive data input pins
Remote Loopback Control input pins
Local Loopback Control input pins
Line Length Control 0 input pins
Line Length Control 1 input pins
Line Length Control 2 input pins
Transmit AIS Enable input pins
Transmit All Ones/Zero Selection input pins when AIS is enabled
Jitter Attenuator Select input pin, placed at Receiver
Jitter Attenuator Select input pin, placed at Transmitter
Driver Failure Monitor output pins
Loss of signal output pins
Output “high” when detect loss of signal
LOSx output is not masked by MLOSx register.
Positive Power Supply for the Transmit Driver
Negative Power Supply for the Transmit Driver
Analog ground.
Note1)
Note1)
Note1)
Note1)
Note1)
Note1)
Note1)
Note1)
Note1)
1.544MHz or 24.704MHz External Reference Clock input pin
Loss of master clock output pin.
Output “high” when detect loss of master clock
LOMC output is not masked by MLOMC register.
Address Select(Address Latch Enable) input pin
Interrupt Output pin(PMOS open drain), Active High,
INT output goes “high” when the alarm is reported to any one of
LOSx, LOTCx or LOMC registers. This pin can be masked by
MLOSx, MLOTCx or MLOMC registers.
Data Strobe(Read Enable) input pin
Read/Write(Write Enable) input pin
Note1)
Note2)
Note2)
Note2)
Note2)
MS0012-E-00
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