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BU2890

Features: · All VCR servo functions on a single chip.· Built-in CTL and mixing amplifiers with AGC.· Built-in wave-shaping circuit for the DFG, DPG and CFG signals.· Mode setting via two-line serial data transfer with parity checking.· Built-in digital gain-compensation circuit for the capstan sys...

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SeekIC No. : 004303297 Detail

BU2890: Features: · All VCR servo functions on a single chip.· Built-in CTL and mixing amplifiers with AGC.· Built-in wave-shaping circuit for the DFG, DPG and CFG signals.· Mode setting via two-line serial...

BU2890 Data Sheet

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Part Number:
BU2890
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

· All VCR servo functions on a single chip.
· Built-in CTL and mixing amplifiers with AGC.
· Built-in wave-shaping circuit for the DFG, DPG and CFG signals.
· Mode setting via two-line serial data transfer with parity checking.
· Built-in digital gain-compensation circuit for the capstan system.
· VISS / VASS compatible with CTL overwrite for playback and VISS code discrimination.
· Microprocessor control for stepless capstan speed control during FF and REW.
· Special constant-voltage diode for playback head switching logic.


Application

·VCRs


Specifications

Parameter
Symbol
Limits
Unit
Power supply voltage
VDD
7
V
Power dissipation
Pd
500*
mW
Operating temperature
Topr
15 ~ + 70
Storage temperature
Tstg
55 ~ + 125
Pin applied voltage

VIN

 VSS 0.3 ~ VDD + 0.3

V

* Reduced by 5mW for each increase in Ta of 1over 25.

 

 


 

 

 




Description

The BU2890 series are LSI linear digital-servo controllers that allows construction of a VCR servo system using one
IC. The package is a SDIP 42 pin.

The circuit BU2890 provides linear input signal wave-shaping, and the BU2890 has a servo function for output of the speed and phase control for the drum and capstan. In addition, it generates a quasi-V pulse for special playback, and has a recording
mode auto-discrimination function, an FM audio head switch signal generator for Hi-Fi systems, and is compatible
with VISS / VASS operation. BU2890 can also steplessly vary capstan speed during FF / REW. It also has a mixing amplifier
and CTL amplifier for linear signal wave-shaping, so external linear circuits are not required.




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