TX4915 데이터 시트보기 (PDF) - Princeton Technology
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TX4915 Datasheet PDF : 3 Pages
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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
LD
16
15
DO
RES
RES
NC
VSS2
VCC2
14
13
12
11
10
9
LD
PFD
and
CP
OSC
1
OSC
IN
BIAS
2
OSC
OUT
3
TXEN
VCO
Prescaler
÷ 64/128
AMP
4
5
VSS TXOUT
6
VSS1
7
VCC1
8
MODIN
Page 1
March 2005
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