RX3140 Datasheet, PDF (1/8 Pages) List of Unclassifed Manufacturers – RX3140 Low Power IF Receiver IC

RX3140 Low Power IF Receiver IC
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 RX3140 is a low power IF receiver IC which is fully compatible with the Toshiba
TA31142 IC and is suitable for use as the second IF downconverter in double-conversion
paging systems. The RX3140 is well-suited for POCSAG paging applications and incor-
porates a 2-level FSK demodulator consisting of a quadrature FM demodulator, on-chip
bit-rate filter, and 1-bit comparator. An on-chip 1 V regulator is provided for convenient
biasing of off-chip circuitry.
Features
u Extremely low power operation with power-down feature
u Built-in crystal oscillator for mixer local oscillator
u Mixer input frequency: 10 — 50 MHz
u Quadrature detector
u On-chip bit-rate filter
u Audio output
u 1-bit comparator with open collector output
u 1 V regulator
u 1.1 V low battery alarm
u SSOP-20 package (0.65 mm pitch)
Block Diagram
20
19
18
17
16
15
14
13
MIX
VSS
REG
REG
ALM
FSK
CHA
BS
IN
OUT
CON
OUT
RGE
12
11
LPF
LPF
OUT
IN
1.0 V
REGULATOR
LOW
1-BIT
BATTERY _COMPARATOR
ALARM
CHARGE/
DISCHARGE
CIRCUIT
MIXER
OSCILLATOR
QUAD
DETECTOR
IFAMP
OSC
IN
1
OSC
OUT
2
MIX
OUT VCC
3
4
IFIN
5
DEC
6
FSK
REF
7
IF
OUT
8
AF
QUAD OUT
9
10
Revision B
Page 1
May 2000