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STV5728 Datasheet

  • STV5728

  • 4-HEAD VIDEO AND 2-HEADS HIFI AUDIO PLAYBACK AND RECORD AMPL...

  • 11頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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STV5728
4-HEAD VIDEO AND 2-HEADS HIFI AUDIO
PLAYBACK AND RECORD AMPLIFIER FOR VCR
PLAYBACK MODE
LOW NOISE AND WIDE BAND AMPLIFIERS
FOR 4 VIDEO HEADS
AUTOMATIC OFFSET
CANCELLATION
BETWEEN THE 2 SELECTED HEADS
ONE PLAYBACK OUTPUT WITH AGC
ONE PLAYBACK OUTPUT (60dB CONSTANT
GAIN)
ONE OUTPUT FOR AUTOMATIC VIDEO
TRACKING
SP/LP ENVELOPE COMPARATOR OUTPUT
LOW NOISE AMPLIFIERS FOR 2 HIFI HEADS
HIFI OUTPUT GAIN (70dB)
RECORD MODE
TRANSCONDUCTANCE AMPLIFIER
VIDEO
AGC AMPLIFIER FOR HIFI
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ONE 5V POWER SUPPLY
PLAYBACK/RECORD MODE SELECTION
THROUGH A LOGIC INPUT
PINNING COMPATIBLE WITH STV5725 AND
STV5727
SO28 PACKAGE
voltage between the two selected heads is auto-
matically 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 deter-
mined 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. For Trick Mode, a signal
resulting from the comparison of the input signal
amplitude is available on ENVC Pin.
SO28
(Plastic Package)
ORDER CODE :
STV5728
FOR
PIN CONNECTIONS
H1SP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
SWR
SWIN
V
CC
RECIN
CPB
GND
YPB
TRIV
ENV
DESCRIPTION
STV5728 is intended for 4 heads VCR applications
with HIFI. It includes all the electrical functions nec-
essaryto achieveplay-back and record processing.
Record or PlaybackMode can be selected through
SWR Pin. SWH allows to select the video head
input (H1SP or H2SP, H1LP or H2LP), while SWM
will select the mode SP or LP. The SWFMH will
select the FM input heads in Playbackand will mute
the HIFI record amplifier in Record Mode.
Playback Mode
(Video)
Signals applied on H1SP, H2SP, H1LP and H2LP
input pins will be amplified by 60dB voltage gain.
I
OUTSP
and I
OUTLP
Pins are AC short-circuited to
ground. The input signal can be selected through
SWH and SWM inputs and the corresponding out-
put signal will be available on Pin CPB. The offset
May 1997
GNDSP
H2SP
I
OUTSP
CCOM
I
OUTLP
H2LP
GNDLP
H1LP
CCOM2
I
OUTFM
H1FM
GNDFM
H2FM
CAGC
FMRIN
FMPB
5728-01.EPS
SWFMH
V
CCFM
1/11

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