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U4223B Datasheet, PDF (1/18 Pages) ATMEL Corporation – Time-Code Receiver with A/D Converter
Time-Code Receiver with A/D Converter
U4223B
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 CLK D3 D2 D1 D0
VCC 1
GND
3
IN 2
16
Power supply
12 17 18 19
ADC
AGC
amplifier
Impulse
circuit
4 5 6 14 15
SB Q1A Q1B Q2A Q2B
20
11 FLB
Decoder
10 FLA
9 DEC
Rectifier & 13 SL
integrator
7
8
REC
INT
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)