Description
The U4074B is a monolithic integrated circuit that contains all integral components of a ringing circuit for telephone sets used in conjunction with a microcomputer.
Features
- D Suitable for specifications FTZ 1TR2 and ETR 2 D Rectifier bridge D Z-diode D Amplitude detection D Supply voltage for microcomputer 3.5 @ D DC operation possible D Bridge push-pull output stage
22 mF V B 2(3) TH 130 kW 3(4) VDD 10 (12) 2f 4(5) 47mF
D CMOS-compatible microcomputer interface D 2-bit log. volume adjustment D High-voltage bipolar technology, 30 V
v 1.5 mA
Benefits
D mC controlled melody and volume D Low number of external components
On/Off a 0.8mF (1)1 a
2.2 kW Ringing signa.
U4070B-FP_TEMICSemiconductors.pdf
