xrt91l31 Exar Corporation, xrt91l31 Datasheet - Page 25

• Manufacturer Part Number: xrt91l31
• Description: Sts-12/stm-4 Or Sts-3/stm-1 Sonet/sdh Transceiver
• Manufacturer: Exar Corporation

REV. 1.0.0
When applying parallel data input to the transmitter, the setup and hold times should be followed as shown in
Figure
F
3.2
IGURE
XRT91L31 Device
Transmit Parallel
Clock driven by
t
t
TXPCLK_IO
TXPCLK_IO
t
t
t
t
S
S
TXPCLK_IO
TXDI_SU
TXDI_HD
TXDI_SU
TXDI_HD
12,
TXDI[7:0]
12. T
Transmit Parallel Data Input Timing
YMBOL
YMBOL
Table 12
RANSMIT
T
T
ABLE
ABLE
and
P
12: T
13: T
ARALLEL
Transmit data setup time with respect to TXPCLK_IO
Transmit data setup time with respect to TXPCLK_IO
Table
Transmit data hold time with respect to TXPCLK_IO
Transmit data hold time with respect to TXPCLK_IO
RANSMIT
RANSMIT
13.
I
NPUT
Transmit Clock Output period
Transmit Clock Output period
P
P
ARALLEL
ARALLEL
T
IMING
P
P
Transmit Parallel Clock Output
t
TXDI_SU
ARAMETER
ARAMETER
STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
D
D
ATA
ATA
t
TXPCLK_IO
I
NPUT
I
25
NPUT
T
T
IMING
IMING
(STS-12/STM-4 O
(STS-3/STM-1 O
t
TXDI_HD
M
M
2.0
1.0
2.0
1.0
IN
IN
PERATION
PERATION
12.86
51.44
T
T
YP
YP
)
)
XRT91L31
M
M
AX
AX
ns
ns
ns
ns
ns
ns
U
U
NITS
NITS