MAX3831 查看數據表（PDF） - Maxim Integrated
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产品描述 (功能)
生产厂家
MAX3831
Maxim Integrated
MAX3831 Datasheet PDF : 16 Pages
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+3.3V, 2.5Gbps, SDH/SONET, 4-Channel
Interconnect Mux/Demux ICs with Clock Generator
(155MHz)
TEST
RSETES
FIL+
FIL-
TRIEN
RCLKI+
RCLKI-
LVDS
PATTERN
155MHz
622MHz
FREQUENCY
GENERATOR
MAX3831
MAX3832
GENERATOR
2.488GHz
LBEN
CK
PDI1+
PDI1-
PDI2+
PDI2-
LVDS
LVDS
ES
4:1
ES
MUX
LINE LOOPBACK
SDO+
SDO-
PDI3+
PDI3-
LVDS
PDI4+
PDI4-
LVDS
PDO1+
PDO1-
PDO2+
PDO2-
LVDS
LVDS
ES
ES
622Mbps PARALLEL LOOPBACK
2.488Gbps
SYSTEM LOOPBACK
TEST
D
2.488Gbps
SDI+
1:4
SDI-
DEMUX
PDO3+
PDO3-
LVDS
PDO4+
PDO4-
LVDS
CK
ROTATE
2.488GHz
SCLKI+
SCLKI-
PLBEN
PCLKO+
LVDS
PCLKO-
*
*MAX3831: fPCLKO = 622MHz, MAX3832: fPCLKO = 155MHz
FRAME
DETECTOR
RSETFR
LOF
622MHz
CLOCK
GENERATOR
Figure 4. Functional Diagram
PDI1
PDI2
PDI3
PDI4
RSETES
RCLKI
PDI1
PDI2
PDI3
PDI4
DATA INPUT
A0 A1
B0 B1 B2
C0 C1
D0 D1
DATA OUTPUT OF ELASTIC STORE
AT t = to
A0
B1
C0
D1
≥10ns
+tes
DATA OUTPUT OF ELASTIC STORE
AT t > to
A0 A1
A0
-tes
B1 B2
B1
C0 C1
C0
D0 D1
D1
Figure 5. Example of Elastic Store Function
sent at the correct location (false frame), the state
machine will return to the frame_search state described
above. While in the in_frame state, each frame will be
checked for a framing pattern at the correct location.
Four consecutive false frames will cause the state
machine to return to the frame_search state described
above. The false-frame counter is reset with three or
fewer consecutive false frames.
Built-In Self-Test
with On-Chip Serial Loopback
An on-chip pattern generator can be enabled to pro-
duce a 622Mbps SDH/SONET-like transport overhead
followed by a pseudorandom bit sequence. This consists
of 12 A1s, 12 A2s, and a pseudorandom bit stream
(PRBS = 27 - 1). When TEST is low, this pattern is distrib-
uted to all parallel inputs, bypassing the LVDS input
buffers. Note, this pattern is skewed by one 622MHz
8 _______________________________________________________________________________________
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