RX3140 Datasheet, PDF (2/8 Pages) List of Unclassifed Manufacturers – RX3140 Low Power IF Receiver IC

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Pin Descriptions
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
Name
OSCIN
OSCOUT
MIXOUT
VCC
IFIN
DEC
FSKREF
IFOUT
QUAD
AFOUT
LPFIN
LPFOUT
BS
Description
Oscillator input (base)
Oscillator output (emitter)
Mixer output (2 KΩ output
impedance)
Nominal 1.4 V supply
IF amplifier input (2 KΩ
input impedance)
IF amplifier de-coupling
capacitor connection
1-bit comparator reference
input (requires external
capacitor)
IF amplifier output
Quadrature FM demodula-
tor input
Quadrature FM demodula-
tor output
LPF operational amplifier
input
LPF operational amplifier
output
Two-state logic input to
control receiver power up/
down.
(BS = high = normal opera-
tion; BS = low = stand-by
mode)
RX3140
Number
14
15
16
17
18
19
20
Name
CHARGE
FSKOUT
ALM
REGCON
REGOUT
VSS
MIXIN
Description
Two-state logic input to
control charge-discharge
circuit.
(CHARGE = high = fast
charge; CHARGE = low =
slow charge)
Open collector NRZ com-
parator output (requires
pull-up resistor)
Open collector low battery
alarm output (requires pull-
up resistor)
1.0 V regulator control out-
put for connection to exter-
nal PNP base
1.0 V regulator input for
connection to external PNP
collector
Ground
Mixer input (5 KΩ input
impedance)
Revision B
Page 2
May 2000