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7

*1 KX-TG2511
*2 KX-TG2521

• 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 (Digital Enhanced Cordless Telecommunications), GAP (Generic Access Profile)

120 Duplex Channels

1.88 GHz to 1.90 GHz

TDMA (Time Division Multiple Access)

1,728 kHz

1,152 kbit/s

GFSK (Gaussian Frequency Shift Keying)

Approx. 10mW (average power per channel)

ADPCM 32 kbit/s

0

C - 40C, 20 % - 80 % relative air humidity (dry)

220 - 240 V AC, 50/60 Hz
Base unit: PQLV219CE
Charger: PQLV219CE 

Standby: Approx. 0.45 W
Maximum: Approx. 3.8 W

Standby: Approx. 0.5 W
Maximum: Approx. 3.8 W
Charger:
Standby: Approx. 0.2 W
Maximum: Approx. 3.0 W

Base unit: Approx. 98 mm x 121 mm x 54 mm
Handset: Approx. 48 mm x 32 mm x 159 mm
Charger unit: Approx. 72 mm x 85 mm x 51 mm 

Base unit

*1

: Approx. 110 g

Base unit

*2

: Approx. 110 g  

Handset: Approx. 130 g  
Charger: Approx. 60 g  

8

D101

CHARGE_C

ON

T

A

C

T

+

-

X501

13.824 MH

z

AN

T

1

TEL J

A

CK

L1R

L1T

DCP

DCM

DC J

A

CK

SIDE

 T

ONE

CIRCUIT

Q161

Q141

BELL 

DE

TEC

T

HOOK

BELL

Q111

LIN

LOUT

RF_

P

A

R

T

HSMIP

HSMIN

BBIC

RECEIVE

AMP

DCIN 1 and 3

VC

C

P

A

VB

A

T_APU

VB

A

T

VC

C_FE

VC

C_IF

VC

C_VC

O

DCINS

CHARGE_DE

T

3.0V

DOUBOUT

SCL, S

DA

WP

VC

C

LCD_B

LT

SW1

Q171

DI,CS

KEYIN 1

KEYS_C

DC/DC

 

C

ONVER

TER

CLK,DO

STM/CKM

R371

R372

D362

Q701, Q702

CHARGE

DE

TEC

T

VCCA

VC

C

SCL,RST

CS

,CD

,SIO

DCIN 2

CA

P

_

SW

CAP_CHG

T

G2521 only

AN

T

2

AN

T

1

RX

p

RX

n

RX

O

N

TX

p

TX

n

TX

O

N

R

ESET

RS

T

N

IN USE

DE

TEC

T 2

R150, R152

FLASH

MEMOR

Y

VBA

T

EEPROM

MEMOR

Y

HS_SUPPL

Y_DE

T

KX

-T

G2511/2521 BL

OCK DIA

GRAM 

(BASE UNIT

)

RL

Y

9

Base Unit consists of the following ICs as shown in Block Diagram (Base Unit) (P.8).

• DECT BBIC (Base Band IC): IC501

- 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.)
- Integrated 1.9GHz PA for DECT

• EEPROM: IC611

- Temporary operating parameters (for RF, etc.)

• FLASH MEMORY: IC601 (for KX-TG2521 only)

- Voice Prompt (TAM) D/L Area
- ICM/OGM Recording Area

• Additionally,

- Power Supply Circuit (+3.0 V output)
- Crystal Circuit (13.824 MHz)
- Charge Circuit

- Telephone Line Interface Circuit

10

[Changed from original section “4.3. Block Diagram (Base Unit RF Part)”]

R X p

R X n

AN T 1

T X p

T X n

KX-TG2511/2521 BLOCK DIAGRAM (Base Unit_RF Part)