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U4223B-MFSG3 Datasheet

  • U4223B-MFSG3

  • Time-Code Receiver with A/D Converter

  • 18頁

  • ATMEL   ATMEL

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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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