TX4915 Low Power ASK Transmitter IC
Princeton Technology Corp. reserves the right to change the product described in this datasheet. All information con-
tained in this datasheet is subject to change without prior notice. Princeton Technology Corp. assumes no responsibility
for the use of any circuits shown in this datasheet.
Description
The TX4915 is a low power ASK transmitter IC intended for applications in the North
American and European VHF/UHF bands. The integrated voltage-controlled oscillator
(VCO), phase/frequency detector, prescaler, and reference oscillator require only the
addition of an external crystal to provide a complete phase-locked loop (PLL). In addi-
tion to the standard power-down mode, the chip also includes an automatic lock-detect
feature that disables the transmitter output when the PLL is out-of-lock.
Features
Output frequency range: 300 – 960 MHz
Supply voltage range: 2.2 – 3.6 V
Low current consumption with power down capability
On-chip VCO with integrated PLL (÷ 64/128) dual modulus prescaler
Out-of-lock inhibit circuit
SSOP-16 package (0.64 mm pitch)
Applications
Wireless mouse
Car alarm and home security systems
Remote control systems
Block Diagram
SW
16
LD
15
DO
14
RES
13
RES
12
NC
11
VSS2
10
VCC2
9
LD
VCO
PFD
and
CP
Prescaler
÷ 64/128
OSC
BIAS
2
3
AMP
1
OSC
IN
4
5
6
7
8
OSC
OUT
TXEN
VSS
TXOUT
VSS1
VCC1
MODIN
March 2005
PTC [ PRINCETON TECHNOLOGY CORP ]
