Document
ZXFV4583
SYNC SEPARATOR WITH VARIABLE FILTER
DEVICE DESCRIPTION
The ZXFV4583 provides the ability to separate out video synchronization signals for a wide variety of TV and CRT display systems, standard and non-standard. Flexibility arises from the use of just three external resistors to adapt to each application. One resistor controls a fully integrated internal color carrier filter with variable bandwidth. This filter avoids disturbance from the color carrier, permitting accurate threshold slicing for timing extraction. A second resistor controls the voltage threshold for loss of signal detection after a time-out interval. The third resistor controls the timing functions. DC restoration for displays is facilitated by the Back Porch synch output, which can be used to drive an external circuit to clamp the blanking voltage to a fixed level.
FEATURES AND BENEFITS
• PAL, NTSC, SECAM • Variable filter for optimal accuracy • Sync outputs: composite, horizontal, vertical, back
porch, odd/even
• No-signal detector • On chip sample / hold capacitors • +5V single supply • Default vertical output where there are no
serration pulses
• Pin and layout compatible with part EL4583 in
SO16N surface mount package
APPLICATIONS
• Digital image capture • Video input systems requiring separation of
picture timing
ORDERING INFORMATION
Part Number ZXFV4583N16TA ZXFV4583N16TC Container Reel 7 ″ Reel 13 ″ Increment 500 2500
• Video distribution • CCTV surveillance • Digital multimedia • Timing for black level clamp
CONNECTION DIAGRAM
ISSUE 3 - NOVEMBER 2003 1
SEMICONDUCTORS
ZXFV4583
ABSOLUTE MAXIMUM RATINGS
Supply voltage VCC Inputs to ground* Operating temperature range Storage Operating ambient junction temperature -0.5V to +7V -0.5V to VCC +0.5V -40ЊC to 85ЊC -65ЊC to +150ЊC TJMAX150ЊC**
**The thermal resistance from the semiconductor die to ambient is typically 120ЊC/W when the SO16 package is mounted on a PCB in free air. The power dissipation of the device when loaded must be designed to keep the device junction temperature below TJMAX. *During power-up and power-down, these voltage ratings require that signals be applied only when the power supply is connected.
ELECTRICAL CHARACTERISTICS
VCC = 5V, RSET = 681k⍀, RFILT = 22k⍀, RNOSIG = 82k⍀, Tamb = 25ЊC unless otherwise stated. Test level: P = 100% production test C = Characterized only
PARAMETER DC Characteristics Supply current Clamp voltage at FILTIN Discharge current at FILTIN Discharge current at FILTIN Clamp charge current at FILTIN Clamp voltage at FVIDIN Discharge current at FVIDIN Discharge current at FVIDIN Clamp charge current at FVIDIN R SET voltage, pin 12 R FILT voltage, pin 1 RNOSIG current, pin 2 Logic output low voltage, V OL
CONDITIONS
TEST
MIN
TYP
MAX UNIT
P Pin 4 unloaded Pin 4, Vin = 2V pk-pk Pin 4, no signal Pin 4, Vin = 1V pk-pk Pin 8 unloaded Pin 8, Vin = 2V pk-pk Pin 8, no signal Pin 8, Vin = 1V pk-pk P C C P P C C P P P P I OL = 1.6mA P
2 1.2
4.5 1.35 1
6.5 1.5
mA V .