T4223B-MF Datasheet

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U4223B

Time-Code Receiver with A/D Converter

Description

The U4223B is a bipolar integrated straight-through receiver circuit in the frequency range of 40 kHz to 80 kHz.

The device is designed for radio-controlled clock applications.

Features

D

Very low power consumption

D

Very high sensitivity

D

High selectivity by using two crystal filters

D

Power-down mode available

D

Only a few external components necessary

D

4-bit digital output

D

AGC hold mode

Block Diagram

PON

VCC 1

GND

16

Power supply

3

9

Impulse

circuit

2

4

AGC

amplifier

5

6

14

15

Rectifier &

integrator

7

REC

8

INT

13

SL

CLK D3

12

17

D2

18

ADC

D1

19

D0

20

Decoder

11

10

FLB

FLA

DEC

IN

SB Q1A Q1B Q2A Q2B

Figure 1. Block diagram

Ordering and Package Information

Extended Type Number

U4223B-MFS

U4223B-MFSG3

T4223B-MF

T4223B-MC

Package

SSO20 plastic

SSO20 plastic

No

No

Remarks

Taping according to IEC-286-3

Die on foil

Die on carrier

Rev. A7, 06-Mar-01

1 (18)

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