PRODUCT SPECIFICATION

nRF0433 Single chip RF Transceiver

Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway

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Phone +4772898900

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Fax +4772898989

Revision: 3.2

Page 5 of 14

February 2000

IMPORTANT TIMING DATA

Power up time

The time from power is switched on until the synthesised frequency is stable is the

4MHz reference signal (eg. from the driver pin of an active micro-controller) is

Figure 4 shows a circuit diagram of a typical application. Note that these times may

vary depending on the crystal used.

micro

controller

nRF0433

X1

X2

C1

(22pF)

C2

(22pF)

CS

XC2

XC1

5.6pF

4.0 MHz

Figure 4. nRF0433 with an external reference oscillator (example).

Power up in transmit-mode

To avoid spurious emission outside the ISM-band during power-up of nRF0433, the

see figure 5.

When enabling transmit-mode, no data should be transmitted before the TXEN-input

TXEN

V

DD

D

IN

t

t

on

t

data