STV5742
2-HEAD PLAYBACK AND RECORD AMPLIFIER FOR VCR
February 1997
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V2
V1
C1
H1
GND1
H2
C2
CAGCREC
RECIN
TRIV
CSYN
GND2
PBOUT
SWIN
I
OUT
V
CC
5742
-
0
1
.
E
P
S
PIN CONNECTIONS
SO16 Narrow
(Plastic Package)
ORDER CODE : STV5742
.
ONE 5V POWER SUPPLY
.
PLAYBACK/RECORD
MODE
SELECTION
THROUGH A LOGIC INPUT
.
SO16 PACKAGE
.
NO ADJUSTMENT FOR LUMINANCE RE-
CORDING
PLAYBACK MODE
.
LOW NOISE AND WIDE BAND AMPLIFIERS
FOR 2 HEADS
.
AUTOMATIC
OFFSET
CANCELLATION
BETWEEN THE 2 SELECTED HEADS
.
ONE PLAYBACK OUTPUT
.
ONE OUTPUT FOR AUTOMATIC VIDEO
TRACKING
RECORD MODE
.
RECORD AGC AMPLIFIER SAMPLED BY
SYNCHRO SIGNAL
.
RECORDING SIGNAL LEVEL ADJUSTABLE
BY EXTERNAL RESISTOR
1/7
1
2
3
4
5
6
7
8
9
10
11
12
13
15
16
RECIN
TRIV
CSYN
GND2
PBOUT
SWIN
CAGCREC
V2
V1
C1
H1
GND1
H2
C2
V
CC
14
S
T
V
5
7
4
2
V
CC
I
OUT
5
742-
02.
E
P
S
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
CC
Power Supply Voltage
6
V
T
j
Junction Temperature
150
o
C
T
oper
Operating Temperature
0, +70
o
C
57
42-
01.
T
B
L
THERMAL DATA
Symbol
Parameter
Value
Unit
R
th (j-a)
Junction-ambient Thermal Resistance
Max.
100
o
C/W
57
42-
02.
T
B
L
RECOMMENDED OPERATING CHARACTERISTICS
Symbol
Parameter
Min.
Typ.
Max.
Unit
V
CC
Power Supply
4.75
5
5.25
V
CAGC
Capacitance on Pin CAGCREC
4.7
nF
RECADJ
Record Biasing Resistor
10
33
k
57
42
-
0
3
.
T
B
L
STV5742
2/7
ELECTRICAL CHARACTERISTICS (T
amb
= 25
o
C, unless otherwise specified)
Playback Mode (V
CC
= 5V, no load on Pin PBOUT, Recadj = 12k
)
Symbol
Parameter
Test Conditions
Min.
Typ. Max.
Unit
PLAYBACK AMPLIFIER
I
CC1
Supply Current
19
29
39
mA
GPB
Playback Gain
Sinewave 600kHz, 0.4mV
PP
on inputs
58
60
62
dB
EN
Equivalent Voltage Noise
Input grounded via I
OUT
Pin @ 600kHz,
BW = 10kHz
0.45
0.6
nV
Hz
IN
Equivalent Input Current Noise
Input open @ 6MHz, BW = 10kHz
2.5
pA
Hz
CRT1
Crosstalk
Sinewave @ 4MHz, 0.4mV
PP
-35
-30
dB
RPBSW
Playback Switch on Resistor
@ 6MHz
1
5
10
BWLCF
Attenuation @ 100KHz
Reference level @ 600kHz
-3
0
1
dB
BWHCF
Attenuation @ 8MHz
Reference level @ 4MHz
-3
-1
0
dB
C
IN
Input Capacitance
@ 6MHz, 22nF between Vi/Hi
40
50
60
pF
Z
IN
Input Impedance
@ 6MHz
300
450
600
ZCPB
Output Resistance
DC
5
24
50
VDCPB1
DC Level on Pin PBOUT
1.6
2
2.4
V
DVDC
Head Switch Offset
-0.1
0
0.1
V
SHPB1
2nd Harmonic
Sinewave @ 4MHz, 0.4mV
PP
-45
-40
dB
TRIV FUNCTION
TRIV0
Output Level (1)
No input signal
0
0.3
1
V
TRIV1
Output Level (2)
Sinewave @ 4MHz, 100mV
PP
@ PBOUT
1.3
V
TRIV4
Output Level (3)
Sinewave @ 4MHz, 400mV
PP
@ PBOUT
2.5
3.1
3.5
V
TRIV6
Output Level (4)
Sinewave @ 4MHz, 600mV
PP
@ PBOUT
3.2
3.7
4.2
V
TRIV1-TRIV0
0.5
1
-
V
Record Mode (V
CC
= 5V, Recadj = 12k
, SWR = 5V, CAGCREC = 470pF, RRCY = 2.2k
,
RRCC = 8.2k
, Load 10
H//1k
for each simulated head)
Symbol
Parameter
Test Conditions
Min.
Typ. Max.
Unit
RECORD AMPLIFIER
I
CC2
Current Supply
55
85
115
mA
IHA0
DC Current through I
OUT
28
38
47.5
mA
IHA1
Fundamental
VRCY = 300mV
PP
@ 4MHz
34
36
38
mA
PP
IHA2
2nd Harmonic
VRCY = 300mV
PP
@ 4MHz
-40
-36
dB
IHA2M
2nd Harmonic
VRCY = 400mV
PP
@ 4MHz,
AGC adjusted for IAH1 = 40mA
PP
-34
-32
dB
BWRECL
Attenuation at 100kHz
Reference level @ 600kHz, AGC locked
-3
0
1
dB
BWRECH
Attenuation at 8MHz
Reference level @ 4MHz, AGC locked
-2
-0.5
1
dB
DVLREC
Record AGC Sensitivity
V
IN
= 300mV
PP
3dB @ f = 4MHz
-0.2
0
+0.2
dB
RIOUT
Output Resistance
V = 5V
3.5
5.5
-
RSAT
Output Stage Resistance
I = 10mA
5
10
50
IRN
AGC Capacitor downloading
Current
4.5V at CAGC Pin
165
A
IRP
AGC Capacitor uploading
Current
0.5V at CAGC Pin,
V
IN
= 300mV
PP
@ 4MHz
-165
A
SWITCHING LEVELS
VSWINH
SWIN Input Threshold
Selects head H1, 0 to 5V
1.5
2
2.5
V
VSWINL
SWIN Input Threshold
Selects head H2, 5 to 0V
1.5
2
2.5
V
ISWINH
SWIN Input Leakage Current
5V at SWIN input
5
18
50
A
ISWINL
SWIN Input Leakage Current
0V at SWIN input
-50
-25
-5
A
VSWRCH
SWRC Input Threshold
Selects record mode, 0 to 5V
3.2
3.4
3.8
V
57
42
-
0
4
.
T
B
L
STV5742
3/7
ELECTRICAL CHARACTERISTICS (T
amb
= 25
o
C, unless otherwise specified)
Record Mode (V
CC
= 5V, Recadj = 12k
, SWR = 5V, CAGCREC = 470pF, RRCY = 2.2k
,
RRCC = 8.2k
, Load 10
H//1k
for each simulated head) (continued)
Symbol
Parameter
Test Conditions
Min.
Typ. Max.
Unit
SWITCHING LEVELS (continued)
VSWRCL
SWRC Input Threshold
Selects playback mode, 5 to 0V
3.1
3.3
3.8
V
ISWRCH
SWRC Input Leakage Current
5V at SWRC input
2
5
8
mA
ISWRCL
SWRC Input Leakage Current
0V at SWRC input
-20
0
20
A
t
ON
Delay
Signal appears on PBOUT
3
ms
t1
Delay from playback to record :
Signal disappears on Pin PBOUT
22nF between Hi/Vi
1
s
t2
Delay from record to playback :
Signal appears on Pin PBOUT
22nF between Hi/Vi
5
ms
t3
Delay from playback to record :
Signal appears on Pin I
OUT
25
s
t4
Delay from record to playback :
Signal disappears on Pin I
OUT
7
s
VCSYH
CSYN Input Threshold
Sampling on (I = -25
A)
2.2
2.5
2.8
V
VCSYL
CSYN Input Threshold
Sampling off (I = 25
A)
2.2
2.5
2.8
V
ICSYH
Leakage Current
Sampling on
-10
A
ICSYL
Leakage Current
Sampling off
10
A
57
42-
05.
T
B
L
1
I
OUT
7
50k
574
2-
0
4
.
E
P
S
Figure 1
2
V1
V
CC
V
CC
2.7k
5742
-
0
5
.
E
P
S
Figure 2
INTERNAL SCHEMATICS
3
V2
V
CC
V
CC
57
42-
06
.
E
P
S
Figure 3
C1/C2
Pins 4/8
V
CC
1k
57
42-
07
.
E
P
S
Figure 4
STV5742
4/7
INTERNAL SCHEMATICS (continued)
H2
V
CC
5
36k
150k
5742
-
0
8
.
E
P
S
Figure 5
H1
V
CC
7
36k
150k
5742
-
0
9
.
E
P
S
Figure 6
SWIN
V
CC
9
V
CC
49k
5
742-
10.
E
P
S
Figure 7
PBOUT
V
CC
11
V
CC
63
5
742-
11.
E
P
S
Figure 8
CSYN
V
CC
13
V
CC
500
57
42-
12.
E
P
S
Figure 9
TRIV
V
CC
14
V
CC
200
57
42-
13.
E
P
S
Figure 10
STV5742
5/7
PDF 
ZIP