STV5726A Datasheet, PDF (5/6 Pages) STMicroelectronics – 2-HEAD PLAYBACK AND RECORD AMPLIFIER FOR VCR

STV5726A
APPLICATION DIAGRAM
C4
22nF
R2
1kΩ _{I OUT SP}
1
V1 SP
2
V2 SP
3
CH1S H1 SP
4
22nF
CH2S H2 SP
5
22nF
GND1
6
CH2L H2 LP
7
22nF
CH1L H1 LP
8
22nF
V2 LP
9
SW2-LP
V1 LP
10
SW1-LP
SW-SP
V_CC
SWREC-SP
SW-M
IN
I_OUT LP
60dB
FF C
OUT
CSYNC
60dB
CAGCREC
20
CAGC
22nF
19
RECIN/SWS
TRIV
18
1N4148
RRCC ^CRCC
8.2kΩ _22nF
RRCY ^CRCY
2.2kΩ _22nF
SWS
CREC
YREC
TRIV
CSYN
17
GND2
16
RADJ
12kΩ
1N4148
YCPB/SWR
15
CSYN
SWR
YCPB
60dB
60dB
V_CC
SWREC-LP
V_CC
14
SWIN
13
RSWM
8.2kΩ
RSWH
22kΩ
ENVC
12
I _OUT LP
SW-L P
I OUT LP
11
C1
22nF
STV5726A
R1
1kΩ
L1 22µH
C2
22µF
C3
22nF
SWM
SWH
ENVC
V_CC
SWITCH TABLE
SW-R
L
H
SW-M
L
H
L
H
L
H
SW-S
L
H
L
SW-H
L
H
L
H
L
H
L
H
L
H
L
H
Channel
SW1-SP
SW2-SP
SW1-LP
SW2-LP
SW-SP
SW-LP
SWREC-SP
SWREC-LP
ENVC (SPLP)
2-SP
1-SP
1-LP
OFF
OFF
2-LP
ON
ON
2-SP
OFF
ON
1-SP
OFF
OFF
High IF LP > SP
Low IF LP < SP
1-LP
ON
OFF
2-LP
SP
OFF
ON
OFF ON
ON
OFF
0V (1)
High Impedance (1)
LP
ON
OFF
ON OFF
OFF
High Impedance (1)
ON
0V (1)
Note : 1. The recording current can be set different for each of the four heads. To perform it the ENVC output is either at low level or high
impedance according to the selected head or mode. Then two external resistors with adequate value have to be connected
respectively between the ENVC and TRIV and SWM and TRIV, playing so that on the equivalent value of the RADJ resistor.
5/6