STV7778S
STV7778S is DEFLECTION PROCESSOR FOR MULTISYNC MONITOR manufactured by STMicroelectronics.
DEFLECTION PROCESSOR FOR MULTISYNC MONITOR
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HORIZONTAL DUAL PLL CONCEPT SELF-ADAPTIVE (30 TO 70k Hz) X-RAY PROTECTION INPUT DC ADJUSTABLE DUTY-CYCLE INTERNAL 1st PLL LOCK/UNLOCK IDENTIFICATION WIDE RANGE DC CONTROLLED H-POSITION ON/OFF SWITCH (FOR PWR MANAGEMENT) TWO H-DRIVE POLARITIES VERTICAL VERTICAL RAMP GENERATOR 45 TO 120Hz AGC LOOP DC CONTROLLED V-AMP, V-POS, S-AMP AND S-CENTERING ON/OFF SWITCH B+ REGULATOR INTERNAL PWM GENERATOR FOR B+ CURRENT MODE STEP-UP CONVERTER DC ADJUSTABLE B+ VOLTAGE OUTPUT PULSES SYNCHRONISED ON HORIZONTAL FREQUENCY INTERNAL MAX CURRENT LIMITATION EWPCC VERTICAL PARABOLA GENERATOR WITH DC CONTROLLED KEYSTONE AND AMPLITUDE GENERAL PARED WITH THE STV7778, THE STV7778S HAS AN INTERNAL METAL SHIELD PROTECTION AGAINST OVERVOLTAGE. POS/NEG H AND V SYNC POL SEPARATED H AND V TTL INPUT SAFETY BLANKING OUTPUT
The goal of this IC is to control all the functions related to the horizontal and vertical deflection in a multimodes or multisync monitor. As can be seen in the block diagram, the STV7778S includes the following functions :
- Positive or Negative sync polarities,
- Auto-sync horizontal processing,
- H-PLL lock/unlock identification,
- Auto-sync Vertical processing,
- East/West signal processing block,
- B+ controller,
- Safety blanking output. An internal metal shield give to the STV7778S more immunity against electromagnetic and electrostatic fields, and therefore, additional safety for critical applications (for example, in case of CRTs with small coated area).
SHRINK42 (Plastic Package) ORDER CODE : STV7778S
DESCRIPTION The STV7778S is a monolithic integrated circuit assembled in a 42 pins shrunk dual in line plastic package.
September 1998 1/11
PIN CONNECTIONS
PLL2C H-DUTY HFLY HGND HREF NC NC NC NC C0 R0 PLL1F HLOCK-CAP FH-MIN H-POS XRAY-IN HSYNC VCC GND H-OUTEM H-OUTCOL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 42 41 40 39 38 37 36 35 34 33 32 31 30...
