2-Wire Interface Board

4

_______________________________________________________________________________________

Note: Odd-numbered pins are on the outer row. Even-numbered pins are on the inner row. All right-angle header signals pass through

the MAX367 circuit protector, except 20.

Table 2. Right-Angle Header P1 Signals

PIN

NAME

FUNCTION

1

DUT +5V

+5V at 1mA power supply to Maxim companion board

2

GND

Signal ground return

3

DUT SDA

SMBDATA interface signal

4

GND

Signal ground return

5

GND

Signal ground return

6

GND

Signal ground return

7

DUT SCL

SMBCLK interface signal

8

GND

Signal ground return

9

DUT SMBSUS

SMBSUS interface signal

10

GND

Signal ground return

11

DUT SMBALERT

Primary ALERT interface signal

12

GND

Signal ground return

13

DUT ALERT2

Secondary ALERT interface signal

14

GND

Signal ground return

15

SPARE OUTPUT A

Spare output from pin 1 of the DB25 connector

16

GND

Signal ground return

17

SPARE OUTPUT B

Spare output from pin 14 of the DB25 connector

18

GND

Signal ground return

19

GND

Signal ground return

20

RAW POWER

Unregulated, unprotected power-supply input to MAXSMBus interface board