PM5381-BI PMC-Sierra, Inc., PM5381-BI Datasheet - Page 549

• Manufacturer Part Number: PM5381-BI
• Description: ATM UNI, Single Channel ATM PHY Interface for 2488.32Mbps
• Manufacturer: PMC-Sierra, Inc.

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2000489, Issue 4
Table 28 compares the S/UNI-2488 Rx and Tx signal levels to a few ODLs (note ODL Rx’s
connect to S/UNI-2488 Rx’s and ODL Tx’s connect to S/UNI-2488 Tx’s).
Table 28 S/UNI-2488 and ODL PECL Amplitude Specifications
As can be seen, the S/UNI-2488 Tx must be correctly programmed (in general the reduced Tx
output amplitude should be used) to be able to inter-operate with the ODLs. Some ODLs claim to
be able to tolerate Tx PECL levels, but this will limit their Rx optical range, thus for best
operation care must be taken to insure the correct levels are sent to the ODL.
Device
Standard ECL/PECL levels
Typical CML levels
S/UNI-2488 Tx (standard output amplitude)
S/UNI-2488 Tx (low output amplitude)
S/UNI-2488 Rx
Lucent Tx (1417K4A)
Lucent Rx (1417K4A)
Sumitomo Tx SDM-7128-XC
Sumitomo Rx SDM-7128-XC
Sumitomo Tx SCM-6028-GL
Sumitomo Rx SCM-6028-GL
HP HFCT-Tx HFCT-5404D
HP HFCT-Rx HFCT-5404D
Hitachi Tx HTR6540
Hitachi Rx HTR6540
Notes:
1
2
3
which will degrade the jitter tolerance of the device. Thus going below this limit is not recommended
Register 0020H, Bit 6 = ‘0’ (default)
Register 0020H, Bit 6 = ‘1’
The S/UNI-2488 Rx does work below this value (measured to work down to 100mVppd), but the jitter goes up,
2
1
S/UNI-2488 Telecom Standard Product Datasheet
Min
1190mVppd
900mVppd
465mVppd
400mVppd
300mVppd
600mVppd
900mVppd
400mVppd
0.8Vppd
400mVppd
400mVppd
600mVppd
300mVppd
640mVppd
3
Typ.
1525mVppd
800mVppd
1000mVppd
533mVppd
-
-
-
-
-
-
-
-
800mVppd
Released
Max
1806mVppd
1100mVppd
600mVppd
2Vppd
1.6Vppd
1Vppd
2.4Vppd
2.3Vppd
2Vppd
2.3Vppd
1.8Vppd
No Spec
1.2Vppd
1Vppd
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