AK2546 Datasheet, PDF (7/27 Pages) Asahi Kasei Microsystems – 7 channel T1 Transceiver

ASAHI KASEI
[AK2546]
PIN DESCRIPTIONS
Pin Name I/O
Function
Comment
T1 Transceiver
TTIP1-7
O
TRING1-7 O
TPOS1-7
I
TNEG1-7
I
TCLK1-7
I
RTIP1-7
I
RRING1-7 I
RPOS1-7
O
RNEG1-7 O
RCLK1-7
O
LOS1-7
O
TVDD1-7
TVSS1-7
AVSS1-8
Transmit Tip/Ring Output
Bipolar output over transmit transformer
Transmit Positive/Negative Data Input
Input on the falling edge of TCLK
Transmit Clock Input
Receive Tip/Ring Input
Bipolar Input over receive transformer
Receive Positive/Negative Data Output
Output on the falling edge of RCLK
Receive Clock Output recovered from receive data input
Loss of signal output
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
Common Block
MCLK
I
AS(ALE)
I
INT
O
DS(RD)
I
R/W (WR) I
CS
I
BTS
I
AD0-AD7 I/O
CLKSEL
I
RESET
I
1.544MHz or 24.704MHz External Reference Clock Input
Address Select(Address Latch Enable) Input
Interrupt Output(PMOS open drain, should be tied to GND through
a resistor), 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
Read/Write(Write Enable) Input
Chip Select Input
Bus Type Select Input
BTS=“H” : Motorola Mode
BTS=“L” : Intel Mode
Address/Data Input/Output
Used for read/write internal registers.
MCLK Select Input
CLKSEL=“H”:1.544MHz
CLKSEL=“L”:24.704MHz
Reset Input
Active “Low” input pulse over 200ns initializes the internal circuit
and forces RPOSx/RNEGx output “low” and LOSx output “high”.
C0019-E-01
7
1999/9