The Pulse-40 OEM has been designed to meet the highest requirement in term of electro-magnetic compatibility. As such, the power supply and all digital I/O have been carefully designed. All electrical specification are given in the following table.

ItemMinTypicalMaxUnit

Power supply





Input voltage

3.0

3.3

5.5

V

Power consumption


0.30


W

EN input





Low level threshold


-

0.3

V

High level threshold

1.2

-

-

V

Input current

120

-

600

µA

LVTTL inputs





Low level input voltage

-

-

0.8

V

High level input voltage

2

-

-

V

Input current

- 20

-

- 40

µA

LVTTL outputs





Low level output voltage

-

0.0

0.4

V

High level output voltage

2.8

3.3

-

V

Max output current

0

-

20

mA

Power supply level

The Pulse-40 OEM v2 supports a power supply range from 3.3 V to 5.0 V. The recommended operating voltage is 3.3 V, as it provides optimal thermal performance.

Operation at 5.0 V is possible but results in higher heat dissipation. It is provided for backward compatibility with the Pulse-40 OEM v1 and is not recommended for new designs.

Connector Pin Assignment

The table below give manufacturer and model number of the recommended mating connector.

Connectors

Manufacturer

Manufacturer P/N

Description

Comment

Pulse-40 connector

ANTELEC

AM2D-127-12-4.7-3.8-G-CMS-H25-P

Connector, Male, Vertical, 6+6 , 1.27mm pitch, Locating Pins, SMD


Mating Connector

HARWIN

M50-3120645Connector, Female, Vertical, 6+6 , 1.27mm pitch, 3.8mm height (max), SMDOctopart: M50-3120645

Note that most of Dual In-Line, 1.27mm pitch, 3.8mm height square connectors could be used.

Main connector pin-out

The following table describes the connector pins function.

Pin#NameType (input/output)DescriptionConnection Tips

1

VDD

Power Input

Power Supply Input

--

2

GND

Ground return

Power Supply Ground return & Signal reference

--

3

EN

Input

Power enable

Tie to VDD for nominal operation

4

RESERVED

-

Reserved for future use

Leave unconnected

5

UART_TX

LVTTL output

UART Data Transmit Signal

Leave unconnected  if not used

6

UART_RX

LVTTL input

UART Data Receive Signal

Tie to 10k Ohm pull-up resistor if not used

7

RESERVED

-

Reserved pin for future use

Tie to GND with a 10k Ohm Pull Down Resistor or leave unconnected.

8

RESERVED

-

Reserved pin for future use

Leave unconnected

9

RESERVED

-

Reserved pin for future use

Leave unconnected

10

RESERVED

-

Reserved pin for future use

Leave unconnected

11

SYNC

LVTTL Input/Output

General purpose input / output. May be configured in one of the following modes:

  • High impedance*
  • SYNC OUT
  • SYNC IN

Leave unconnected if not used

12

TX_EN

LVTTL Output

TX_EN, Driver enable signal for RS485 transceivers

Leave unconnected if not used

*Pin 11 is set in high impedance mode by default