TX4915 Datasheet, PDF (1/9 Pages) List of Unclassifed Manufacturers – TX4915 VHF/UHF TRANSMITTER

TX4915 VHF/UHF TRANSMITTER
the wireless IC company
HiMARK Technology, Inc. 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. HiMARK Technology, Inc. assumes no responsibility
for the use of any circuits shown in this datasheet.
Description
The TX4915 is a monolithic integrated circuit intended for use as a low-cost AM/ASK
transmitter. The chip can be used in applications in the north American and European
VHF/UHF bands. The integrated VCO, phase detector, prescaler, and reference oscillator
transistor require only the addition of an external crystal to provide a complete phase-
locked loop. In addition to the standard power-down mode, the chip also includes an auto-
matic lock-detect feature that disables the transmitter output when the PLL is out-of-lock.
Features
K Fully Integrated Frequency Synthesizer
K 2.2V to 5.5V Voltage Supply Range
K Low Current and Power Down Capability
K Integrated VCO and Reference Oscillator
K integeated 64/128 Dual Modulus Prescaler
K 100MHz to 960MHz frequency Range
K Out-of-Lock inhibit Circuit
Package and Pin Assignment
16 pin, plastic SSOP (dimensions in mm)
NOTE
1. PACKAGE BODY SIZES EXCLUDE MOLD FLASH AND
GATE BURRS
2. DIMENSION L IS MEASURED IN GAGE PLANE
3. TOLERANCE 0.10 mm UNLESS OTHERWISE SPECIFIED
4. CONTROLLING DIMENSION IS MILLIMETER. CONVERTED
INCH DIMENSIONS ARE NOT NECESSARILY EXACT.
5. FOLLOWED FORM JEDEC MO-137
θ
SYMBOLS
A
A1
A2
b
C
D
E
E1
e
L
y
θ
DIMENSIONS IN MILLIMETERS
MIN
NOM MAX
1.35
1.60
1.75
0.10
−−−
0.25
−−−
1.45
−−−
0.20
0.25
0.30
0.19
−−−
0.25
4.80
−−−
5.00
5.80
−−−
6.20
3.80
−−−
4.00
−−−
0.64
−−−
0.40
−−−
1.27
−−−
−−−
0.10
0°
−−−
8°
DIMENSIONS IN INCHES
MIN
NOM MAX
0.053
0.004
−−−
0.008
0.007
0.189
0.228
0.150
−−−
0.016
−−−
0°
0.064
−−−
0.057
0.010
−−−
−−−
−−−
−−−
0.025
−−−
−−−
−−−
0.069
0.010
−−−
0.012
0.010
0.197
0.244
0.157
−−−
0.050
0.004
8°
OSCIN ¹
OSCOUT ²
TXEN ³
VSS ⁴
PAOUT ⁵
VSS1 ⁶
VCC1 ⁷
MODIN ⁸
TX4915 HiMARK
16 _SW
15 _LD
14 _DO
13 _RES
12 _RESB
11 _VREFP
10 _VSS2
9 _VCC2
Page 1
March 2000