Datasheet

1300 Henley Court

Pullman, WA 99163

509.334.6306

www.digilentinc.com

PmodOC1™ Reference Manual

Revised March 30, 2015

This manual applies to the PmodOC1 rev. C

DOC#: 530-062

Other product and company names mentioned may be trademarks of their respective owners.

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Overview

The Digilent PmodOC1 uses open-collector BJT's to drive high current applications.

1 Functional Description

The PmodOC1 utilizes MMBT3904 transistors in a open collector format. Each transistor can drive up to 100 mA of

current individually and can draw up to 200 mA of current.

2 Interfacing with the Pmod

The Pmod communicates with the host board via the GPIO protocol. A logic level high voltage will “turn on” the

BJT and a logic low signal will keep the BJT “off”.

The PmodOC1.

 Four 100mA (200mA max) MMBT3904

transistors

 6-pin header and 6-pin connector

 Four output clamp diodes

 40V voltage threshold

Features include:

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300 Henley Court Pullman, WA 99163 509.334.6306 www.digilentinc.com PmodOC1™ Reference Manual Revised March 30, 2015 This manual applies to the PmodOC1 rev. C Overview The Digilent PmodOC1 uses open-collector BJT's to drive high current applications. Features include:     Four 100mA (200mA max) MMBT3904 transistors 6-pin header and 6-pin connector Four output clamp diodes 40V voltage threshold The PmodOC1.
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PmodOC1™ Reference Manual Pin 1 2 3 4 5 6 Signal P1 P2 P3 P4 GND VCC Description Output 1 Output 2 Output 3 Output 4 Power Supply Ground Positive Power Supply Table 1. Pinout description table. Any external power applied to the PmodOC1 must be within 2.7V and 5.25V; however, it is recommended that Pmod is operated at 3.3V. 3 Physical Dimensions The pins on the pin header are spaced 100 mil apart. The PCB is 1 inch long on the sides parallel to the pins on the pin header and 0.