KESTX01
400MHz - 460MHz ASK Transmitter
Preliminary Information
Supersedes September 1996 version, DS4548 - 2.0
DS3969 - 3.8 August 1998
The KESTX01 is a single chip ASK (Amplitude Shift Key)
transmitter IC. It is designed to operate in a variety of low
power radio applications including keyless entry, general
domestic and industrial remote control, RF tagging and local
paging systems.
The transmitter offers a high level of integration and per-
formance, which enables the harmonic rejection and funda-
mental power requirements of the ESTI 300 220, and
other governing bodies, to be met.
The basic architecture utilises a crystal reference oscilla-
tor, an integrated frequency multiplying PLL and a power
output stage. The design is centred around the popular
433.92MHz operating frequency and particular emphasis has
been placed on low current drain, including a power–down
feature which greatly increases battery life.
XTAL1
VCOTST
VEE1
LF
LF1
TXEN
VCC
1
.
41
XTAL2
PWRC
DATA
OUTB
OUT
VCCPA
KESTX01
8
7
KESTX01
VEE2
MP14
Figure.1 Pin connections - top view
FEATURES
s
Low supply Current
s
Power down feature
s
Adjustable output power level
s
Low external part count
s
Fully integrated VCO, PLL and Power Amplifier
ABSOLUTE MAXIMUM RATINGS
Junction temperature
-55 to +150°C
Storage temperature
-55 to +150°C
Supply voltage
V
EE
-0.5 to +8.0V
Voltage on any pin
V
EE
-0.5 to V
CC
+0.5V
Notes:
1. The voltage on pin OUT and OUTB (open collector outputs)
can support a higher voltage than this (+14V)
ORDERING INFORMATION
KESTX01/IG/MPAD (Tape and Reel)
KESTX01/IG/MPAS (Tubes)
VCC
VCC
TXEN
PLL POWER SUPPLY
VCCPA
PWRC
DATA
1
64
PHASE
DETECTOR
OUT
OUT B
VEE2
XTAL
OSCILLATOR
VCO
VEE1
XTAL1 XTAL2
LF
LF1
VCOTST
Figure.2 block diagram
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
