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STV5728 Datasheet(PDF) 1 Page - STMicroelectronics

Part No. STV5728
Description  4-HEAD VIDEO AND 2-HEADS HIFI AUDIO PLAYBACK AND RECORD AMPLIFIER FOR VCR
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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STV5728 Datasheet(HTML) 1 Page - STMicroelectronics

 
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STV5728
4-HEAD VIDEO AND 2-HEADS HIFI AUDIO
PLAYBACK AND RECORD AMPLIFIER FOR VCR
May 1997
SO28
(Plastic Package)
ORDER CODE : STV5728
.
ONE 5V POWER SUPPLY
.
PLAYBACK/RECORD
MODE
SELECTION
THROUGH A LOGIC INPUT
.
PINNING COMPATIBLE WITH STV5725 AND
STV5727
.
SO28 PACKAGE
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
FOR
VIDEO
.
AGC AMPLIFIER FOR HIFI
DESCRIPTION
STV5728 is intended for 4 heads VCR applications
with HIFI. It includes all the electrical functions nec-
essary to 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.
IOUTSP and IOUTLP 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
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.
I
OUTLP
SWR
SWIN
V
CC
RECIN
CPB
TRIV
1
2
3
4
5
6
7
8
9
10
28
27
26
25
24
23
22
21
20
19
ENV
CAGC
H1SP
GNDSP
H2SP
H2LP
CCOM
I
OUTSP
GNDLP
CCOM2
H1LP
GND
YPB
11
12
13
14
18
17
16
15
I
OUTFM
H1FM
GNDFM
H2FM
FMPB
SWFMH
V
CCFM
FMRIN
PIN CONNECTIONS
1/11


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