Datasheet nRF401 Datasheet (Nordic VLSI)

PRODUCT SPECIFICATION

433MHz Single Chip RF Transceiver

FEATURES

• True single chip FSK transceiver

• Few external components required

• No set up or configuration

• No coding of data required

• 20kbit/s data rate

• 2 channels

• Wide supply range

• Very low power consumption

• Standby mode

APPLICATIONS

• Alarm and Security Systems

• Automatic Meter Reading (AMR)

• Home Automation

• Remote Control

• Surveillance

• Automotive

• Telemetry

• Toys

• Wireless Communication

nRF401

GENERAL DESCRIPTION

nRF401 is a true single chip UHF transceiver designed to operate in the 433MHz ISM
(Industrial, Scientific and Medical) frequency band. It features Frequency Shift
Keying (FSK) modulation and demodulation capability. nRF401 operates at bit rates
up to 20kbit/s. Transmit power can be adjusted to a maximum of 10dBm. Antenna
interface is differential and suited for low cost PCB antennas. nRF401 features a
standby mode which makes power saving easy and efficient. nRF401 operates from a
single +3-5V DC supply.
As a primary application, nRF401 is intended for UHF radio equipment in compliance
with the European Telecommunication Standard Institute (ETSI) specification
EN 300 220-1 V1.2.1.

QUICK REFERENCE DATA

Parameter Value Unit

Frequency, Channel#1/Channel#2 433.92 / 434.33 MHz
Modulation FSK
Frequency deviation

Max. RF output power @ 400Ω, 3V
Sensitivity @ 400Ω, BR=20 kbit/s, BER<10
Maximum bit rate 20 kbit/s
Supply voltage 2.7 – 5.25 V
Receive supply current 250
Transmit supply current @ -10 dBm output power 8 mA
Standby supply current 8

-3

±15

10 dBm

-105 dBm

*

kHz

µA

µA

Table 1. nRF401 quick reference data.

ORDERING INFORMATION

Type number Description Version

nRF401-IC 20 pin SSOIC A

nRF401-EVKIT Evaluation kit with nRF401 IC 1.0

Table 2. nRF401 ordering information.

*

The PWR_UP pin is used for power duty cycling. The duty-cycle is 2 % with a period of 200msec.

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Revision: 1.5 Page 1 of 18 May 2000

PRODUCT SPECIFICATION

nRF401 Single Chip RF Transceiver

BLOCK DIAGRAM

DOUT

TXEN

CS

DIN

PWR_UP

10

19

12

9

18

REFERENCE

PLLOSC VCO

20

LOOP

FILTER

5 6 1141

INDUCTOR

Figure 1. nRF401 block diagram with external components.

PIN FUNCTIONS

Pin Name Pin function Description

1

XC1 Input Crystal oscillator input

2

VDD Power Power supply (+3-5V DC)

3

VSS Ground Ground (0V)

4

FILT1 Input Loop filter

5

VCO1 Input External inductor for VCO

6

VCO2 Input External inductor for VCO

7

VSS Ground Ground (0V)

8

VDD Power Power supply (+3-5V DC)

9

DIN Input Data input

10

DOUT Output Data output

11

RF_PWR Input Transmit power setting

12

CS Input Channel selection

CS=“0” ⇒ 433.92MHz (Channel#1)
CS=“1” ⇒ 434.33MHz (Channel#2)

13

VDD Power Power supply (+3-5V DC)

14

VSS Ground Ground (0V)

15

ANT2 Input/Output Antenna terminal

16

ANT1 Input/Output Antenna terminal

17

VSS Ground Ground (0V)

18

PWR_UP Input Power on/off

PWR_UP = “1” ⇒ Power up (Operating mode)
PWR_UP = “0” ⇒ Power down (Standby mode)

19

TXEN Input Transmit enable

TXEN = “1” ⇒ Transmit mode
TXEN = “0” ⇒ Receive mode

20

XC2 Output Crystal oscillator output

VCO

PA

LNADEM

RF_PWR

16

ANT1

ANT2

15

Table 3. nRF401 pin functions.

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PRODUCT SPECIFICATION

DD

DD

DD

DD

nRF401 Single Chip RF Transceiver

ELECTRICAL SPECIFICATIONS

Conditions: VDD = +3V DC, VSS = 0V, TA= -25°C to +85°C

Symbol Parameter (condition) Min. Typ. Max. Units

VDD Supply voltage 2.7 3 5.25 V

VSS Ground 0 V

I

Total current consumption

DD

Receive mode
Transmit mode @ -10 dBm RF power
Stand by mode

P

Max. RF output power @ 400Ω load

RF

V

Logic “1” input voltage

IH

V

Logic “0” input voltage 0

IL

V
V

Logic “1” output voltage (IOH = - 1.0mA)

OH

Logic “0” output voltage (IOL = 1.0mA) 0

OL

I

Logic “1” input current (VI = VDD) +20

H

I

Logic “0” input current (VI = VSS) -20

L

f

Channel#1 frequency 433.92 MHz

1

f

Channel#2 frequency 434.33 MHz

2

0.7⋅V

0.7⋅V

Dynamic range 90 dB
Modulation type FSK
Frequency deviation

∆f
f

IF frequency 400 kHz

IF

BWIF IF bandwidth 65 85 kHz
f

Crystal frequency 4.0 MHz

XTAL

Crystal frequency stability requirement
Sensitivity @ 400Ω,BR=20 kbit/s, BER < 10

1)

-3

Bit rate 0 20 kbit/s

Z

Recommended antenna port differential impedance 400

I

Spurious emission Compliant with EN 300-220-1 V1.2.1

11

8
8

mA
mA

µA

10 dBm

V

DD

0.3⋅V

V

DD

0.3⋅V

µA
µA

±15

±45

kHz

ppm

-105 dBm

V
V
V
V

Ω

2)

Table 4. nRF401 electrical specifications.

1)

Maximum 5dB sensitivity degradation at temperature extremes. See also page 11.

2)

With a PCB loop antenna or a differential to single ended matching network to a 50Ω antenna.

ABSOLUTE MAXIMUM RATINGS

Supply voltages

VDD..............................- 0.3V to +6V

VSS ................................................0V

Input voltage

VI......................- 0.3V to VDD + 0.3V

Output voltage

VO.....................- 0.3V to VDD + 0.3V

Note: Stress exceeding one or more of the limiting values may cause permanent
damage to the device.

ATTENTION!

Electrostatic Sensitive Device
Observe Precaution for handling

Power dissipation

PD (TA=25°C)...........................250mW

Temperatures

Operating Temperature…. -25°C to +85°C
Storage Temperature…... -40°C to +125°C

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Revision: 1.5 Page 3 of 18 May 2000

PRODUCT SPECIFICATION

α

nRF401 Single Chip RF Transceiver

PIN ASSIGNMENT

XC1
VDD

FILT1
VCO1
VCO2
VSS
VDD
DIN

10

1
2
3
4
5
6
7
8
9

nRF401

20 pin SSOIC

Figure 2. nRF401 pin assignment.

PACKAGE OUTLINE

nRF401, 20 pin SSOIC. (Dimensions in mm.)

20

19
18
17

16

15

14
13

12

11

XC2
TXEN
PWR_UPVSS
VSS
ANT1
ANT2

VSS
VDD

CS
RF_PWRDOUT

20 19 18

E H

1 2 3

D

A

A

1

e b L

Package Type D E H A A

20 pin SSOIC

(Wide)

Min

Max

6.90

7.50

5.00

5.60

7.40

8.20 2.00

0.05

e b L Copl.

1

0.65

0.22

0.38

0.55

0.95 0.10

αα

0°
8°

Figure 3. SSOIC-20 Package outline.

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PRODUCT SPECIFICATION

nRF401 Single Chip RF Transceiver

IMPORTANT TIMING DATA

Timing information

The timing information for the different operations is summarised in Table 5.
(TX is transmit mode, RX is receive mode and Std.by is Standby mode.)

Change of Mode Name Max Delay Condition
TX è RX t
RX è TX t
Std.byè TX t
Std.byè RX t
VDD=0 è TX t
VDD =0 è RX t

TR
RT

ST
SR
VT
VR

Table 5 Switching times for nRF401.

Switching TX ↔↔ RX (operational mode).

When switching from RX-mode to TX-mode data (DIN) may not be sent before the
TXEN-input has been high for at least 1ms, see Figure 4(a).
When switching from TX-mode to RX-mode the receiver may not receive data
(DOUT) before the TXEN-input has been low for at least 3ms, see Figure 4(b).

3ms
1ms
2ms
3ms
4ms
5ms

Operational
mode

Start-up

RX to TX

VDD

PWR_UP

TXEN

DIN

PWR_UP

1ms

ms

0 2 4

TX to RX

VDD

TXEN

DOUT

3ms

0 2 4

(a) (b)

Figure 4. Timing diagram for nRF401for switching from RX to TX (a)

and TX to RX (b).

Switching between standby and RX-mode (operational mode).

The time from the PWR_UP input is set to “1”, until the data (DOUT) is valid is t
see Table 5. Worst case tSR is 3ms for nRF401 as can be seen in Figure 5 (a).

SR,

ms

,

Switching between standby and TX-mode (operational mode).

The time from the PWR_UP input is set to “1”, until the synthesised frequency is
stable is tST, see Table 5.

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PRODUCT SPECIFICATION

nRF401 Single Chip RF Transceiver

VDD

PWR_UP

TXEN

DOUT

Std.by to RX

VDD

PWR_UP

TXEN

DIN

3ms

ms

0 2 4

(a)

Std.by to TX

1ms1ms

0 2 4

(b)

Figure 5 Timing diagram for nRF401 when going from standby to RX-mode (a) or

TX-mode (b).

Power up to transmit-mode (start-up).

To avoid spurious emission outside the ISM-band when the power supply is switched
on, the TXEN-input must be kept low until the synthesised frequency is stable, see
Figure 6 (a).

ms

When enabling transmit-mode, TXEN-input should be high for at least 1 ms before
data (DIN) is transmitted, see Figure 6 (a).

VDD

PWR_UP

TXEN

DIN

VDD=0 to TX

3ms 1ms

0

(a)

VDD

PWR_UP

TXEN

DOUT

ms

2 4

VDD=0 to RX

5ms

0 2 4

(b)

6

Figure 6. Timing diagram for nRF401 when powering up to TX-mode (a)

or RX-mode (b).

Power up to receive mode (start up).

In transition from power up to receive mode, the receiver may not receive data
(DOUT) until VDD has been stable (VDD > 2.7 V) for at least 5ms, see Figure 6(b).
If an external reference oscillator is used, the receiver may receive data (DOUT) after
3ms.

ms

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Revision: 1.5 Page 6 of 18 May 2000

PRODUCT SPECIFICATION

RF in/out 50 ohm

nRF401 Single Chip RF Transceiver

APPLICATION INFORMATION

Antenna input/output

The ANT1 and ANT2 pins provide RF input to the LNA (Low Noise Amplifier) when
nRF401 is in receive mode, and RF output from the PA (Power Amplifier) when
nRF401 is in transmit mode. The antenna connection to nRF401 is differential and the
recommended load impedance at the antenna port is 400Ω.

Figure 12 shows a typical application schematic with a differential loop antenna on a
Printed Circuit Board (PCB). The output stage (PA) consists of two open collector
transistors in a differential pair configuration. VDD to the PA must be supplied
through the collector load. When connecting a differential loop antenna to the
ANT1/ANT2 pins, VDD should be supplied through the centre of the loop antenna as
shown in Figure 12.

A single ended antenna or 50Ω test instrument may be connected to nRF401 by using
a differential to single ended matching network (BALUN) as shown in Figure 7.

180nH

18nH

ANT1

470pF

nRF401

ANT2

1.8pF

VDD

18nH

Figure 7. Connection of nRF401 to single ended antenna by using

a differential to single ended matching network.

The 180nH inductor to VDD in Figure 7, need to have a Self-Resonance Frequency
(SRF) above 433 MHz to be effective. Suitable inductors are listed in Table 6.

Vendors WWW address Part. no., 180 nH inductors,

0603 size

Stetco http://www.stetco.com 0603G181KTE
Coilcraft http://www.coilcraft.com 0603CS-R18XJBC
muRata http://www.murata.com LQW1608AR18J00

Table 6. Vendors and part. no. for suitable 180nH inductors.

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PRODUCT SPECIFICATION

Total Chip Current

Current Consumption [mA]

RF Output Power

nRF401 Single Chip RF Transceiver

An additional notch filter (L and C) at the 50Ω RF input/output may be necessary
dependent on the application requirements (see application note nAN400-05).

A single ended antenna may also be connected to nRF401 using an 8:1 impedance RF
transformer. The RF transformer must have a centre tap at the primary side for VDD
supply.

RF output power

The external bias resistor R3 connected between the RF_PWR pin and VSS sets the
output power. The RF output power may be set to levels up to +10dBm. In Figure 8
the output power is plotted for power levels down to, but not limited to, -8.5dBm for a
differential load of 400Ω. DC power supply current versus external bias resistor value
is shown in Figure 9.

10

8
6
4
2
0

-2

-4

-6

-8

-10
0 20 40 60 80 100 120 140 160 180 200

22

27

33

39

47

56

68

82

100

120

150

180

Resistor Value [kΩΩ]

Figure 8. RF output power vs. external power setting resistor (R3) for nRF401.

30,0

25,0

20,0

15,0

10,0

5,0

22

27

33

39

47

56

68

82

100

120

150

180

0,0

0 20 40 60 80 100 120 140 160 180 200

Resistor Value [kΩΩ]

Figure 9. Total chip current consumption vs. external power setting resistor (R3) for

nRF401.

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PRODUCT SPECIFICATION

≤

≤

⋅

nRF401 Single Chip RF Transceiver

PLL loop filter

The synthesiser loop filter is an external, single-ended second order lag-lead filter.
The recommended filter component values are: C3 = 820 pF, C4 =15 nF, and
R2 = 4.7 kΩ, see Figure 12.

VCO inductor

An external 22nH inductor connected between the VCO1 and VCO2 pins is required
for the on-chip voltage controlled oscillator (VCO). This inductor should be a high
quality chip inductor, Q > 45 @ 433 MHz, with a maximum tolerance of ± 2%. The
following 22 nH inductors (0603) are suitable for use with nRF401.

Vendors WWW address Part. no., 22 nH inductors, 0603

size

Pulse http://www.pulseeng.com PE-0603CD220GTT
Coilcraft http://www.coilcraft.com 0603CS-22NXGBC
muRata http://www.murata.com LQW1608A22NG00
Stetco http://www.stetco.com 0603G220GTE
KOA http://www.koaspeer.com KQ0603TE22NG

Table 7. Vendors and part no. for suitable 22nH inductors.

See page 11 and 12 for PCB layout guidelines regarding placement of the inductor.

Crystal specification

To achieve an active crystal oscillator (XOSC) with low power consumption, certain
requirements apply for crystal loss and capacitive load.

The crystal specification is:

f= 4.0000 MHz Crystal parallel resonant frequency

pFCo 5

ohmESR 150

Crystal parallel equivalent capacitance

. Crystal equivalent series resistance

pFCL14≤ Total crystal load capacitance, including capacitance in PCB

layout.

For the crystal oscillator shown in Figure 10 the load capacitance becomes:

C

= ,

L

´2´1CCCC

Where C1´ = C1 + C

´2´1

+

and C2´ = C2 + C

PCB1

PCB2

C1 and C2 are 0603 SMD capacitors as shown in the application schematic, see
Figure 12 and Table 9. C

PCB1

and C

are the layout parasitic capacitance on the

PCB2

circuit board.

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PRODUCT SPECIFICATION

nRF401 Single Chip RF Transceiver

Internal

External

components

Crystal

oscillator

Crystal

C1

R

C2

Crystal

equivalent

Co

Cs L

ESR

Figure 10. Crystal oscillator and crystal equivalent.

Sharing a reference crystal with a micro-controller

Figure 11 shows circuit diagram of a typical application where nRF401 and a micro
controller share the reference crystal.

XC1

micro

controller

X1 X2

4.0 MHz

C1

22pF

R

C

5.6pF

C2

22pF

1.0M

nRF401

XC2

Figure 11. nRF401 and a micro-controller sharing the reference crystal.

The crystal reference line from the micro-controller should not be routed close to full
swing digital data or control signals.

Transmit/receive mode selection

TXEN is a digital input for selection of transmit or receive mode.
TXEN = “1” selects transmit mode.
TXEN = “0” selects receive mode.

Channel#1 / Channel#2 selection

CS is a digital input for selection of either channel#1 (f1=433.92MHz)
or channel#2 (f2=434.33MHz).
CS = “0” selects channel#1.
CS = “1” selects channel#2.

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PRODUCT SPECIFICATION

nRF401 Single Chip RF Transceiver

Input Response

TXEN CS PWR_UP Channel # Mode

0 0 1 1 RX
0 1 1 2 RX
1 0 1 1 TX
1 1 1 2 TX

X X 0 -- Standby

Table 8. Required setting for standby and channel selection in RX and TX.

DIN (data input) and D

(data output)

OUT

The DIN pin is the input to the digital modulator of the transmitter. The input signal
to this pin should be standard CMOS logic level at data rates up to 20 kbit/s. No
coding of data is required.

DIN = “1” → f = f0 + ∆f
DIN = “0” → f = f0 - ∆f

The demodulated digital output data appear at the D

pin at standard CMOS logic

OUT

levels.

f0 + ∆f → DOUT=“1”,
f0 - ∆f → DOUT=“0”.

Power up

PWR_UP is a digital input for selection of normal operating mode or standby mode.
PWR_UP = “1” selects normal operating mode.
PWR_UP = “0” selects standby mode.

Frequency difference between transmitter and receiver

For optimum performance, the total frequency difference between transmitter and
receiver should not exceed 70 ppm (30 kHz). This yields a crystal stability
requirement of ±35 ppm for the transmitter and receiver. Frequency difference
exceeding this will result in a -12dB/octave drop in receiver sensitivity. The
functional frequency window of the transmission link is typically 450 ppm (200 kHz).

Example: A crystal with ±20 ppm frequency tolerance and ±25 ppm frequency
stability over the operating temperature has a worst case frequency difference of ±45
ppm. If the transmitter and receiver operate in different temperature environments, the
resulting worst-case frequency difference may be as high as 90 ppm. Resulting drop
in sensitivity due to the extra 20 ppm, is then approx. 5dB.

PCB layout and decoupling guidelines

A well-designed PCB is necessary to achieve good RF performance. A PCB with a
minimum of two layers including a ground plane is recommended for optimum
performance.

The nRF401 DC supply voltage should be decoupled as close as possible to the VDD
pins with high performance RF capacitors, see Table 9. It is preferable to mount a

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PRODUCT SPECIFICATION

nRF401 Single Chip RF Transceiver

large surface mount capacitor (e.g. 2.2 µF ceramic) in parallel with the smaller value
capacitors. The nRF401 supply voltage should be filtered and routed separately from
the supply voltages of any digital circuitry.

Long power supply lines on the PCB should be avoided. All device grounds, VDD
connections and VDD bypass capacitors must be connected as close as possible to the
nRF401 IC. For a PCB with a topside RF ground plane, the VSS pins should be
connected directly to the ground plane. For a PCB with a bottom ground plane, the
best technique is to have via holes in or close to the VSS pads.

Full swing digital data or control signals should not be routed close to the PLL loop
filter components or the external VCO inductor.

The VCO inductor placement is important. The optimum placement of the VCO
inductor gives a PLL loop filter voltage of 1.1 ±0.2 V, which can be measured at
FILT1 (pin4). For a 0603 size inductor the length between the centre of the
VCO1/VCO2 pad and the centre of the inductor pad should be 5.4 mm, see Figure 13
(c) (layout, top view), for a 2 layer, 1.6 mm thick FR4 PCB.

PCB layout example

Figure 13 shows a PCB layout example for the application schematic in Figure 12.
A double-sided FR-4 board of 1.6mm thickness is used. This PCB has a continuous
ground plane on the bottom layer. Additionally, there are ground areas on the
component side of the board to ensure sufficient grounding of critical components. A
large number of via holes connect the top layer ground areas to the bottom layer
ground plane. There is no ground plane beneath the antenna.

For more layout information, please refer to application note nAN400-05,
“nRF401 RF and antenna layout.

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PRODUCT SPECIFICATION

aaaaaaaa

nRF401 Single Chip RF Transceiver

APPLICATION SCHEMATIC

+3V

C5

2.2uF
1206

C4
15nF
0603

R2

4.7K
0603

L1
22nH
0603

C6
100nF
0603

C7
1nF
0603

DIN

DOUT

C3
820pF
0603

PLL FILTER

R1
1M

0603

X1

C1

4.000 MHz
22pF
0603

REFERENCE

U1

1

XC1

2

VDD

3

VSS

4

FILT1

5

VCO1

6

VCO2

7

VSS

8

VDD

9

DIN

10

DOUT

nRF401
433MHz Single Chip RF Transceiver
SSOIC20

XC2

TXEN

PWR_UP

VSS
ANT1
ANT2

VSS

VDD

RF_PWR

C2
22pF
0603

20
19

TXEN

18

PWR_UP

17
16
15
14
13
12

CS

CS

11

R3
22K
0603

C8
100pF
0603

J1
Loop antenna
25x15mm
Q=55

C9
100pF
0603

C10

3.3pF
0603

C11

5.6pF
0603

R4
18K
0603

Figure 12. nRF401 application schematic.

Component Description Size Value Tolerance Units

C1 NP0 ceramic chip capacitor, (Crystal oscillator) 0603 22 pF
C2 NP0 ceramic chip capacitor, (Crystal oscillator) 0603 22 pF
C3 X7R ceramic chip capacitor, (PLL loop filter) 0603 820 pF
C4 X7R ceramic chip capacitor, (PLL loop filter) 0603 15 nF
C5 X7R ceramic chip capacitor, (Supply decoupling) 1206 2.2
C6 X7R ceramic chip capacitor, (Supply decoupling) 0603 100 nF
C7 X7R ceramic chip capacitor, (Supply decoupling) 0603 1 nF
C8 NP0 ceramic chip capacitor, (Supply decoupling) 0603 100 pF

C9 NP0 ceramic chip capacitor, (Supply decoupling) 0603 100 pF
C10 NP0 ceramic chip capacitor, (Antenna tuning) 0603 3.3 ±0.1 pF
C11 NP0 ceramic chip capacitor, (Antenna tuning) 0603 5.6 ±0.25 pF

L1 VCO inductor, Q>45 @ 433 MHz 0603 22

±2%

R1 0.1W chip resistor, (Crystal oscillator) 0603 1.0

R2 0.1W chip resistor, (PLL loop filter) 0603 4.7

R3 0.1W chip resistor, (Transmitter power setting) 0603 22

R4 0.1W chip resistor, (Antenna Q reduction) 0603 18

X1 Crystal - 4.000 MHz

µF

nH

MΩ

kΩ
kΩ
kΩ

Table 9. Recommended External Components.

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PRODUCT SPECIFICATION

nRF401 Single Chip RF Transceiver

a) Top silk screen b) Bottom silk screen

c) Top view d) Bottom view

Figure 13. PCB layout (example) for nRF401 with loop antenna.

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PRODUCT SPECIFICATION

nRF401 Single Chip RF Transceiver

DEFINITIONS

Data sheet status

Objective product specification This datasheet contains target specifications for product development.
Preliminary product
specification
Product specification This datasheet contains final product specifications. Nordic VLSI ASA

Limiting values

Stress above one or more of the limiting values may cause permanent damage to the device. These are stress
ratings only and operation of the device at these or at any other conditions above those given in the
Specifications sections of the specification is not implied. Exposure to limiting values for extended periods may
affect device reliability.

Application information

Where application information is given, it is advisory and does not form part of the specification.

Nordic VLSI ASA reserves the right to make changes without further notice to the
product to improve reliability, function or design. Nordic VLSI does not assume any
liability arising out of the application or use of any product or circuits described
herein.

This datasheet contains preliminary data; supplementary data may be
published from Nordic VLSI ASA later.

reserves the right to make changes at any time without notice in order to
improve design and supply the best possible product.

Table 10. Definitions.

LIFE SUPPORT APPLICATIONS

These products are not designed for use in life support appliances, devices, or systems
where malfunction of these products can reasonably be expected to result in personal
injury. Nordic VLSI ASA customers using or selling these products for use in such
applications do so at their own risk and agree to fully indemnify Nordic VLSI ASA
for any damages resulting from such improper use or sale.

Product specification: Revision Date: 26.05.2000.

Datasheet order code: 260500nRF401

All rights reserved ®. Reproduction in whole or in part is prohibited without the prior
written permission of the copyright holder.

Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway - Phone [phone] - Fax [phone]
Revision: 1.5 Page 15 of 18 May 2000

PRODUCT SPECIFICATION

nRF401 Single Chip RF Transceiver

YOUR NOTES

Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway - Phone [phone] - Fax [phone]
Revision: 1.5 Page 16 of 18 May 2000

PRODUCT SPECIFICATION

nRF401 Single Chip RF Transceiver

YOUR NOTES

Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway - Phone [phone] - Fax [phone]
Revision: 1.5 Page 17 of 18 May 2000

PRODUCT SPECIFICATION

nRF401 Single Chip RF Transceiver

Nordic VLSI - World Wide Distributors

For Your nearest dealer, please see http://www.nvlsi.no

Main Office:

Vestre Rosten 81, N-7075 Tiller, Norway

Phone: [phone], Fax: [phone]

E-mail: [e-mail]

Visit the Nordic VLSI ASA website at http://www.nvlsi.no

Revision: 1.5 Page 18 of 18 May 2000