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6

• Design and specifications are subject to change without notice.

• Operation range: Up to 300 m outdoors, Up to 50 m indoors, depending on the condition.
• Analog telephone connection: Telephone Line
• DECT repeater: KX-A405

DECT (Digital Enhanced Cordless 
Telecommunications),
GAP (Generic Access Profile)
   Number of channels:
120 Duplex Channels
   Frequency range:
1.88 GHz to 1.90 GHz
   Duplex procedure:
TDMA (Time Division Multiple Access)
   Channel spacing:
1,728 kHz
   Bit rate:
1,152 kbit/s
   Modulation:
GFSK (Gaussian Frequency Shift Keying)
   RF transmission power:
Approx. 10 m W (average power per channel) 

   Power source (AC Adaptor):
220–240 V AC, 50/60 Hz

   Power consumption

Base unit: PNLV226CE0Z

Charger: PQLV219CEW

Standby: Approx. 0.4 W
Maximum: Approx. 0.8 W
Charger:
Standby: Approx. 0.2 W
Maximum: Approx. 3.0 W

   Operating conditions:
0

°C–40 °C, 20 %–80 % relative air humidity (dry) 

   Dimensions:
Base unit: Approx. 126 mm x 90 mm x 77 mm
Handset: Approx. 47 mm x 25 mm x 148 mm
Charger: Approx. 72 mm x 79 mm x 52 mm
   Mass (weight):
Base unit: Approx. 140 

g

Handset: Approx. 115 

g

Charger: Approx. 55 

g

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■

■

■

■

■

   Voice coding:
ADPCM 32 kbit/s

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7

Analog

Front

End

To TEL_LINE

Bridge

Rect

 D3 D

3

Hook Switch

Q3,Q4,Q5Q

3

,Q

4

,Q

5

Audio

Bell/Caller ID

Interface

CPU

21

23

15

17

19

20

14

BELL

HOOK

Off-Hook Line Voltage

13

A/D

D/A

ADPCM

Codec Filter

DSP

Speech Encoding

Speech Decoding

BMC

Burst Encoding

Burst Decoding

RF

PLL 

5

2

79

9

10

EEPROM

SCL

SDA

59

58

To AC Adaptor

DC/DC convertorD

C

/D

C

 c

o

n

v

e

rt

o

r

IC2,L3,C36,Q602IC

2

,L

3

,C

3

6

,Q

6

0

2

Q9Q

9

Q8Q

8

2.4V

Reg.

1.8V

Reg.

2.85 V

2.4 V

1.8 V

BBIC

KX-TG5581 BLOCK DIAGRAM (BASE UNIT)

MOD/DEMOD

Charge

Pump

DCDC

Converter

44

XTAL

X1X

1

10.368

MHz

RX

n

RX

p

TX

p

TX

n

TX

on

RX

on

D801

6

72

ANT1

ANT2

ANT1

ANT2

ANT1

ANT2

78

80

L1

L2

DCP

DCM

3

QSPI

FLASH MEMORY

IC431

43

3.0V

QSPI-CS 

DC,DCI

DC-CTRL

DC-SENSE 

QSPI-SCK 

QSPI-IO 0-3

90,92,

94,96

91

95

83 
82

84

QSPI

Control

8

Base Unit consists of the following ICs as shown in Block Diagram (Base Unit) (P.7).

• DECT BBIC (Base Band IC): IC7

- Handling all the audio, signal and data processing needed in a DECT base unit
- Controlling the DECT specific physical layer and radio section (Burst Module Controller section)
- ADPCM code filter for speech encoding and speech decoding (DSP section)
- Echo-cancellation and Echo-suppression (DSP section)
- Any tones (tone, sidetone, ringing tone, etc.) generation (DSP section)
- DTMF receiver (DSP section)
- Clock Generation for RF Module
- ADC, DAC, timer, and power control circuitry
- PLL Oscillator
- Detector 
- Compress/Expander
- First Mixer
- All interfaces (ex: QSPI FLASH MEMORY, EEPROM, LED, Analog Front End, etc.)
- DCDC Converter
- Integrated 1.9GHz PA for DECT

• EEPROM: IC401

- Temporary operating parameters (for RF, etc.)

• Additionally,

- Power Supply Circuit (+3.0 V, +2.4 V, +1.8 V output)
- Crystal Circuit (10.368 MHz)
- Charge Circuit
- Telephone Line Interface Circuit

• QSPI FLASH MEMORY IC431

- Main Program D/L Area

9

The power is supplied to the DECT BBIC, QSPI FLASH MEMORY and EEPROM from AC Adaptor (+5.5 V) as shown in
Fig.101. The power supply is as follows;

• DECT BBIC (IC7): 

DC Jack (+5.5 V) 

→ IC2 → IC7

DC Jack (+5.5 V) 

→ IC2 → Q9 → IC7

DC Jack (+5.5 V) 

→ IC2 → Q8 → IC7

• EEPROM (IC401): 

DC Jack (+5.5 V) 

→ IC2 → IC7→ IC401

• QSPI FLASH MEMORY: 

DC Jack (+5.5 V) 

→ IC2 → IC7 → IC431

<Fig.101>

AC Adaptor 

DCP

IC2

Q9

IC7 

IC401

IC431

5.5 V 

1.8 V 

3.0 V 

3.0 V 

Q8

2.4 V 

DC

Jack

2.85 V 

DCM

1

2

3

On

DC 

S

1.8 V

Reset

(IC7_61pin)

Off