RX3140 查看數據表（PDF） - Unspecified

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RX3140

RX3140 Low Power IF Receiver IC

Unspecified 

the wireless IC company

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

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