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- 4/8/08

Data Out

3 Vdc

2.4 kbps Application Circuit

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DR3000

7

6

DR5000

Data Out

3 Vdc

19.2 kbps Application Circuit

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34

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8

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11

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33 k

DR5000

Pin

Name

Description

9VCC

This is the positive supply voltage pin for the module. The operating voltage range is 2.7 to 3.5 Vdc. It is also possible to use

Pin 1 as the Vcc input. Please refer to the Pin 1 description above.

10

GND

This is the supply voltage return pin.

11

CTR1

CTR1 is connected to the CNTRL1 control pin on the receiver. CTR1 and CTR0 select the transceiver operating modes. CTR1

and CTR0 both high place the unit in the receive mode. CTR1 and CTR0 both low place the unit in the power-down (sleep)

mode. CTR1 is a high-impedance input (CMOS compatible). This pin must be held at a logic level; it cannot be left uncon-

nected. At turn on, the voltage on this pin and CTR0 should rise with VCC until VCC reaches 2.7 Vdc (receive mode). Thereaf-

ter, any mode can be selected.

12

CTR0

CTR0 is connected to the CNTRL0 control pin on the receiver CTR0 is used with CTR1 to control the operating modes of the

receiver. CTR0 is a high-impedance input (CMOS compatible). This pin must be held at a logic level; it cannot be left uncon-

nected. At turn on, the voltage on this pin and CTR1 should rise with VCC until VCC reaches 2.7 Vdc (receive mode). Thereaf-

ter, any mode can be selected.

13

RFIO

RFIO is the RF input/output pin. A matching circuit for a 50 ohm load (antenna) is implemented on the circuit board between

this pin and the receiver SAW filter transducer.

14

RF GND

This pin is the RF ground (return) to be used in conjunction with the RFIO pin. For example, when connecting the transceiver

module to an external antenna, the coaxial cable ground is connected this pin and the coaxial cable center conductor is con-

nected to RFIO.