AK2546 Datasheet, PDF (21/27 Pages) Asahi Kasei Microsystems – 7 channel T1 Transceiver

ASAHI KASEI
[AK2546]
Remote Loopback(RESET=1, MCLK: Clocked, PD=0)
Loopback
POLN
RDEN
TCLK
Receive
TTIP
RCLK
RPOS
LOS
Local Remote
signal
TRING
RNEG
0
1
1
*
*
RTIP
RTIP
in
RCLK
0
RRING
RRING
RTIP
0
1
1
0
*
loss
0
RRING
0
1
RTIP
RTIP
0
1
1
1
*
loss
RCLK
1
RRING
RRING
0
1
0
*
*
RTIP
RTIP
in
RCLK
0
RRING
RRING
RTIIP
0
1
0
0
*
loss
0
RRING
1
1
RTIP
RTIP
0
1
0
1
*
loss
RCLK
1
RRING
RRING
Local Loopback(RESET=1, MCLK: Clocked, PD=0)
Loopback
POLN
RDEN
TCLK
Receive
TTIP
RCLK
RPOS
LOS
Local Remote
signal
TRING
RNEG
1
0
1
*
clocked
in
TPOS
TCLK
TPOS
0
TNEG
(Note 2)
TNEG
1
0
1
*
clocked
loss
TPOS
TCLK
TPOS
1
TNEG
(Note 2)
TNEG
1
0
1
*
loss
in
0
0
0
0
1
0
1
*
loss
loss
0
0
0
1
1
0
0
*
clocked
in
TPOS
TCLK
TPOS
0
TNEG
(Note 2)
TNEG
1
0
0
*
clocked
loss
TPOS
TCLK
TPOS
1
TNEG
(Note 2)
TNEG
1
0
0
*
loss
in
0
0
1
0
1
0
0
*
loss
loss
0
0
Note 1) The impedance between TTIP and TRING is 30kΩ(typ).
Note 2) The phase of the TCLK satisfies receive output timing.
1
1
C0019-E-01
21
1999/9