Table III-1

Contact Assignments for J0 Backplane Connectors (Slots 2 Through 21)

for 10U Physics Subracks, 10U CDF Subracks & 7U Physics Subracks

Pin #

Row z

Row a

Row b

Row c

Row d

Row e

Row f

1

COM

+5 V

+5 V

+5 V

+5 V

+5 V

COM

2

COM

RET_WX

RESERVED

+5 V

TBUS1+

TBUS1-

COM

3

COM

RET_WX

RESERVED

RESERVED

TBUS2+

TBUS2-

COM

4

COM

Vw

RESERVED

USER I/O

USER I/O

USER I/O

COM

5

COM

Vw

RESERVED

USER I/O

USER I/O

USER I/O

COM

6

COM

RET_WX

RESERVED

USER I/O

USER I/O

USER I/O

COM

7

COM

AREF_WX

RESERVED

USER I/O

USER I/O

USER I/O

COM

8

COM

RET_WX

RESERVED

USER I/O

USER I/O

USER I/O

COM

9

COM

Vx

RESERVED

USER I/O

USER I/O

USER I/O

COM

10

COM

Vx

RESERVED

USER I/O

USER I/O

USER I/O

COM

11

COM

Vy

RESERVED

USER I/O

USER I/O

USER I/O

COM

12

COM

Vy

RESERVED

USER I/O

USER I/O

USER I/O

COM

13

COM

RET_YZ

RESERVED

USER I/O

USER I/O

USER I/O

COM

14

COM

AREF_YZ

RESERVED

USER I/O

USER I/O

USER I/O

COM

15

COM

RET_YZ

RESERVED

USER I/O

USER I/O

USER I/O

COM

16

COM

Vz

RESERVED

USER I/O

USER I/O

USER I/O

COM

17

COM

Vz

RESERVED

RESERVED

TBUS3+

TBUS3-

COM

18

COM

RET_YZ

RESERVED

RESERVED

TBUS4+

TBUS4-

COM

19

COM

RET_YZ

RESERVED

RESERVED

TBUS_OC1

TBUS_OC2

COM

Notes:

1. AREF_WX, AREF_YZ, all RESERVED and all USER I/O pins are unbussed feed-throughs that do not connect to any backplane planes or signal lines.

2. Vw, Vx, Vy and Vz are extra power pins whose voltage is determined by the system integrator. Vw and Vx share a common return plane RET_WX. Vy and Vz share a common return plane RET_YZ. RET_WX and RET_YZ are isolated from each other and all other returns.