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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

u

u

u

u

u

u

u

u

u

Extremely low power operation with power-down feature

Built-in crystal oscillator for mixer local oscillator

Mixer input frequency: 10 鈥?50 MHz

Quadrature detector

On-chip bit-rate filter

Audio output

1-bit comparator with open collector output

1 V regulator

1.1 V low battery alarm

SSOP-20 package (0.65 mm pitch)

Block Diagram

20

MIX

IN

19

VSS

18

REG

OUT

17

REG

CON

16

ALM

15

FSK

OUT

14

CHA

RGE

13

BS

12

LPF

OUT

11

LPF

IN

1.0 V

REGULATOR

LOW

1-BIT

BATTERY COMPARATOR

ALARM

CHARGE/

DISCHARGE

CIRCUIT

MIXER

QUAD

DETECTOR

OSCILLATOR

IFAMP

OSC

IN

OSC

OUT

MIX

OUT

FSK

REF

IF

OUT

AF

OUT

VCC

IFIN

DEC

QUAD

1

2

3

4

5

6

7

8

9

10

Revision B

Page 1

May 2000

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RX3140相關(guān)型號(hào)PDF文件下載

• 型號(hào)
  版本
  描述
  廠商
  下載
• RX3140
  英文版
  RX3140 Low Power IF Receiver IC
  ETC
  RX3140
• RX3140
  英文版
  RX3140 Low Power IF Receiver IC
  ETC [ETC]
  RX3140
• RX3141
  英文版
  Mouse. Pager.
  ETC
  RX3141
• RX3141
  英文版
  Mouse. Pager.
  RX3141

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