28370-PBD-005-A_15 Datasheet, PDF (1/1 Pages) M/A-COM Technology Solutions, Inc. – Upgrading Bt837x Designs

28370-PBD-005-A
February 10, 2003
Bt8370/Bt8375/Bt8376
Product Bulletin: Upgrading Bt837x Designs
Product Affected: Bt8370/Bt8375/Bt8376
This document describes the changes that are required to upgrade an existing design based on
Bt8370-20, Bt8370-21, Bt8375-16, Bt8375-17, Bt8376-16 or Bt8376-17 to Bt8370-22,
Bt8370-23, Bt8375-23 or Bt8376-23 devices.
‹ DID (Device Id; addr 000) for the new revisions is different. Please see the table below for
new values:
Device
DID
Bt8370-22
9
Bt8370-23
9
Bt8375-23
9
Bt8376-23
9
If your application software checks for the DID, please modify the software as per the new
values given in the table above.
‹ The device-side secondary protection on the Tx lines is no longer required for Bt8370-22,
Bt8370-23, Bt8375-23, or Bt8376-23 devices.
‹ Earlier versions of the Bt8370, Bt8375 and Bt8376 devices required device-side secondary
protection devices for improved latchup immunity as illustrated in Figures 4-1 and 4-4 of
the Bt8370/75/76 data sheet (doc# N8370DSE).
NOTE:
The Bt8370-22, Bt8370-23, Bt8375-23, or Bt8376-23 devices work
fine even if the device-side secondary protection on the Tx lines is still
present.
‹ In the newer Bt8370/Bt8375/Bt8376 parts (Bt8370/22 or Bt8370-23, Bt8375-23, Bt8376-
23), the reset path going from IER4 to IER7 is no longer blocked. IER4 to IER7 are
properly reset by a software or hardware reset, however the POR procedure as described in
section 2.10.4 of the Bt8370 data sheet (document # 500030B) is still necessary since the
LOOP register needs to be manually reset.
Please contact your local Mindspeed Technologies sales office for placing orders for the newer
devices.
Mindspeed Technologies™
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