DESCRIPTION
STV5727 is intended for 2 heads VCR applications. Record or Playback Mode can be selected through SWR Pin. Playback Mode Signals applied on H1 and H2 input pins will be amplified by 60dB voltage gain. IOUTSP Pin is AC short-circuited to ground by CCOM. The input signal can be selected through SWIN Pin and the correspondingoutput signal will be available on Pin CPB. The offset voltage between the two heads is automatically cancelled after 32 switching head cycles. A constant output signal will be available on Pin YPB thanks to an AGC function (Automatic Gain Control). The time constant of the AGC is determined by the capacitor value connected to CAGC Pin. For Automatic Tracking, a signal which is a function of the selected input signal amplitude is present on Pin TRIV. According to the voltage level on SWIN Pin, the triv gain can be change. PIN CONNECTIONS H1 GND1 H2 IOUTSP CCOM CAGC TRIV 1 2 3 4 5 6 7 14 13 12 11 10 9 8 April 1996 This is advance information on a new product now in development or undergoing evaluation.
STMicroelectronics
