Pin Details Details of IC TDA 2591

Substitute : A255D , TDA 2590 , TDA 2593

Functions :
  1. Sync Separator
  2. Vertical Sync separator
  3. AFC
  4. Horizontal Sync separator
  5. Burs gating and Horizontal blangking pulse generator
Pin
No.
FunctionsVoltage
1.Positive (+Ve supply voltage )12
2.Positive (+Ve supply voltage ) output stage (trigger pulse input)12
3.Horizontal trigger pulse output (15625Hz.)1.2
4.Selection of output pulse duration0
5.Decoupling Capacitor6.5
6.Horizontal flyback(blanking)pulse (15625Hz.)for 2nd phase caparator0.2
7.Sancastle (Horizontal blanking pulse )output (15625Hz.)1.8
8.Vertical sync output (50Hz.)0.2
9.Sync pulse input1.6
10.Noise separator input2.2
11.VCR swithching (Coincidence)5.7
12.Time contant swithching (third phase caomparator )2.2
13.First phase comparator output6.1
14.Ramp (sawtooth)oscillator capacitance6
15.Horizontal frequency (15625 Hz.) adjust (H-Hold)6
16.Ground (-Ve supply voltage )0


 
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