XRT91L31IQTR-F Exar Corporation, XRT91L31IQTR-F Datasheet - Page 27

• Manufacturer Part Number: XRT91L31IQTR-F
• Description: SONET SDH - 8 Bit OC12/STM4, OC3/STM1 PHY Transceiver (with Improved Jitter Transfer Used For Loop Timing Applications)
• Manufacturer: Exar Corporation
• Type: Transceiverr

Specifications of XRT91L31IQTR-F

• Input: LVCMOS, LVPECL, LVTTL
• Output: LVCMOS, LVPECL, LVTTL
• Frequency - Max: 77.76MHz
• Voltage - Supply: 3.135 V ~ 3.465 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-FQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

REV. 1.0.2
The PISO is used to convert 77.76 Mbps or 19.44 Mbps parallel data input to 622.08 Mbps STS-12/STM-1 or
155.52 Mbps STS-3/STM-1 serial data output respectively, which can interface to an optical module. The
PISO bit interleaves parallel data input into a serial bit stream taking the first bit from TXDI7, then the first bit
from TXDI6, and so on as shown in
F
3.5
IGURE
t
t
TXPCLK_IO
TXPCLK_IO
t
t
t
t
S
S
TXPCLK_IO
TXDI_SU
TXDI_HD
TXDI_SU
TXDI_HD
15. S
YMBOL
YMBOL
Transmit Parallel Input to Serial Output (PISO)
TXDI n+
TXDI7
TXDI0
TXDI n
T
T
ABLE
ABLE
IMPLIFIED
b
b
b
b
14: A
15: A
n+
0
n
7
8-bit Parallel LVTTL Input Data
7
7
7
7
b
b
b
b
n+
0
n
7
6
6
6
6
b
b
b
b
LTERNATE
n+
LTERNATE
0
n
7
5
5
5
5
B
b
b
b
b
n+
0
n
7
Transmit data setup time with respect to TXPCLK_IO
Transmit data setup time with respect to TXPCLK_IO
STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
LOCK
4
4
4
Transmit data hold time with respect to TXPCLK_IO
Transmit data hold time with respect to TXPCLK_IO
4
b
b
b
b
n+
0
n
7
3
3
3
3
b
b
b
b
n+
0
n
7
2
2
2
D
2
b
b
b
b
T
IAGRAM OF
n+
T
0
n
7
1
1
1
RANSMIT
1
RANSMIT
b
b
b
b
n+
0
n
7
0
0
0
0
Transmit Clock Input period
Transmit Clock Input period
Figure
77.76 MHz (STS-12/STM-4) or 19.44 MHz (STS-3/STM-1)
P
P
P
P
PISO
15.
ARALLEL
ARALLEL
ARAMETER
ARAMETER
time (0)
D
b
D
7
27
0
ATA
ATA
b
6
0
b
I
5
I
NPUT
0
NPUT
b
4
155.52 Mbps STS-3/STM-1 serial data rate
0
b
3
0
T
T
622.08 Mbps STS-12/STM-4 or
b
IMING
IMING
2
0
(STS-12/STM-4 O
(STS-3/STM-1 O
b
7
7
b
6
7
M
M
2.0
1.0
2.0
1.0
b
5
7
IN
IN
b
4
7
b
3
7
12.86
51.44
b
T
T
2
7
YP
YP
PERATION
b
PERATION
1
7
b
0
7
XRT91L31
M
M
AX
AX
).
)
TXOP/N
ns
ns
ns
ns
ns
ns
U
U
NITS
NITS