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There are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper
(Sn+Ag+Cu), you can also use Tin and Copper (Sn+Cu) or Tin, Zinc, and Bismuth (Sn+Zn+Bi). Please check the manufacturer’s
specific instructions for the melting points of their products and any precautions for using their product with other materials. 
The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3 mm, 0.6 mm and 1.0 mm.

When discarding P. C. Board, delete all personal information such as telephone directory and caller list or scrap P. C. Board.

0.3 mm X 100 g

0.6 mm X 100 g

1.0 mm X 100 g

7

*1 KX-TG6811/KX-TG6881
*2 KX-TG6821/KX-TG6891

• 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
• Optional DECT repeater: KX-A405
• Optional Key finder: KX-TGA20RU

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: PNLV226CE0Z
Charger: PNLV233CEKZ 

Standby: Approx. 0.6 W
Maximum: Approx. 2.5 W

Standby: Approx. 0.8 W
Maximum: Approx. 3.1 W
Charger:
Standby: Approx. 0.12 W
Maximum: Approx. 1.8 W

Base unit: Approx. 107 mm x 86 mm x 77 mm
Handset: Approx. 48 mm x 29 mm x 164 mm
Charger unit: Approx. 70 mm x 70 mm x 39 mm 

Base unit

*1

: Approx. 100 g

Base unit

*2

: Approx. 120 g  

Handset: Approx. 130 g  
Charger: Approx. 40 g  

8

Oper

ational P

.C

. Board

D101

CHARGE_CONT

A

C

T

+

-

SP

X501

13.824 MHz

ANT

2

ANT

1

TEL

 J

A

CK

L1R

L1T

DCP

DCM

DC J

A

CK

RL

Y

LINE

DETECT

SIDE T

O

NE

CIRCUIT

Q161

Q141

BELL

 

DETECT

HOOK

BELL

Q

111

LIN

LOUT

RF_P

AR

T

HSMIP

HSMIN

IC501

BBIC

INUSE

DETECT

 2

RECEIVE

AMP

DCIN 1 and 3

IC302

VCCP

A

VBA

T_APU

VBA

T

VCC_FE

VCC_IF

VCC_VCO

DCINS

CHARGE_DET

3.0V

DOUBOUT

SCL, SDA

WP

VCC

IC601

FLASH

MEMOR

Y

IC61

1

EEPR

OM

MEMOR

Y

KEYS

R151,R152

Q171

DI,CS

MSG_LED

KEYIN 1~3

KEYS_C~E

SPOUTN

SPOUTP

3.0 V

REGULA

T

O

R

Q351,

 Q352

CLK,DO

STM/CKM

R371

R372

D362

Q701, Q702

CHARGE

DETECT

VCCA

VCC

SCL,RST

CS

,CD,SIO

DCIN 2

CAP

_

SW

CAP_CHG

HS_SUPPL

Y_DET

BA

CKUP

CAP

 CIRCUIT

PO

WER

SUPPL

Y

CIRCUIT

FR

OM

HS

C901

optional

optional

TG6721 only

TG6721 only

ANT2

ANT1

RXp

RXn

RXON

TXp

TXn

TXON

RESET

RSTN

KX-TG681

1/6821 BLOCK DI

A

GRAM 

(BASE UNIT)

LED

T

AM counter P

.CBoard

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-TG6821 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