U4072BAFP, U4074B, U4074BA Selling Leads, Datasheet
MFG:tfk Package Cooled:tfk D/C:dc96
U4072BAFP, U4074B, U4074BA Datasheet download
Part Number: U4072BAFP
MFG: tfk
Package Cooled: tfk
D/C: dc96
U4072BAFP, U4074B, U4074BA
- Table of contents:
Info of U4072BAFP
Info of U4074B
Info of U4074BA
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About U401
PDF/DataSheet Download
Datasheet: U401
File Size: 29550 KB
Manufacturer: CALOGIC [Calogic, LLC]
Download : Click here to Download
About U4074B
PDF/DataSheet Download
Datasheet: U4074B
File Size: 101714 KB
Manufacturer: TEMIC [TEMIC Semiconductors]
Download : Click here to Download
About U401
PDF/DataSheet Download
Datasheet: U401
File Size: 29550 KB
Manufacturer: CALOGIC [Calogic, LLC]
Download : Click here to Download
U4074B General 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. The combination of a microcomputer and the U4074B permits flexible programming of the ringing sequence (melody), tone and volume control.
Ringing frequency detection takes place in the microcomputer. The U4074B is responsible for the interface to the line, driver stages for the piezoelectric sound transducer, volume adjustment, amplitude detection, voltage supply for the microcomputer and other auxiliary functions.
U4074B Maximum Ratings
|
Parameter |
Symbol |
Value |
Unit |
| Supply current Pin 1, 14 ( 1, 16 ) |
IS |
50 |
mA |
| Supply current Pin 11, 12 (13,14) |
±I0 |
50 |
mA |
| Junction temperature |
Tj |
125 |
°C |
| Ambient temperature |
Tamb |
25 to +60 |
°C |
| Storage temperature |
Tstg |
40 to +125 |
°C |
| Power dissipation Tamb = 60 °C DIP14 SO16 |
Ptot |
860 |
mW |
|
Ptot |
400 |
mW |
U4074B Features
` Suitable for specifications FTZ 1TR2 and ETR 2
` Rectifier bridge
` Z-diode
` Amplitude detection
` Supply voltage for microcomputer 3.5 @ 1.5 mA
` DC operation possible
` Bridge push-pull output stage
` CMOS-compatible microcomputer interface
` 2-bit log. volume adjustment
` High-voltage bipolar technology, 30 V
U4074B Connection Diagram
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