STV5744A
4-HEAD PLAYBACK AND RECORD AMPLIFIER FOR VCR
May 1997
GND1
I
OUT
V
C C
CA GCREC
RECIN/SWS
TRIV
C SYN
GND2
SWIN
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
ENVC
I
OUT
LP
SP
V1 SP
V2 SP
H1 SP
H2 SP
H2 LP
H1 LP
V1 LP
V2 LP
YCPB/SWR
574
4A
-
01.
E
P
S
PIN CONNECTIONS
SO20
(Plastic Micropackage)
ORDER CODE : STV5744A
.
ONE 5V POWER SUPPLY
.
PLAYBACK/RECORD
MODE
SELECTION
THROUGH A LOGIC INPUT
.
SO20 PACKAGE
.
NO ADJUSTMENT FOR LUMINANCE RE-
CORDING
PLAYBACK MODE
.
LOW NOISE AND WIDE BAND AMPLIFIERS
FOR 4 HEADS
.
AUTOMATIC
OFFSET
CANCELLATION
BETWEEN THE 2 SELECTED HEADS
.
ONE PLAYBACK OUTPUT
.
ONE OUTPUT FOR AUTOMATIC VIDEO
TRACKING
.
SP/LP ENVELOPE COMPARATOR
.
SHORT-CIRCUIT SWITCHES ON UNUSED
HEADS
RECORD MODE
.
RECORD AGC AMPLIFIER SAMPLED BY
SYNCHRO SIGNAL
.
RECORDING SIGNAL LEVEL ADJUSTABLE
BY EXTERNAL RESISTOR
.
SHORT-CIRCUIT SWITCHES ON UNUSED
HEADS
1/8
ELECTRICAL CHARACTERISTICS (T
amb
= 25
o
C, unless otherwise specified)
Playback Mode (V
CC
= 5V, no load on Pin YCPB, Recadj = 12k
)
Symbol
Parameter
Test Conditions
Min.
Typ. Max.
Unit
PLAYBACK AMPLIFIER
I
CC1
Supply Current
42
52
62
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
0.6
0.7
nV
Hz
IN
Equivalent Input Current Noise
Input open @ 6MHz, BW = 10kHz
1.7
pA
Hz
CRT1
Crosstalk (LP
SP)
Sinewave @ 4MHz, 0.4mV
PP
-45
-40
dB
CRT2
Crosstalk (SP
LP)
Sinewave @ 4MHz, 0.4mV
PP
-41
-35
dB
RPBSW
Playback Switch on Resistor
@ 6MHz
5
10
15
BWLCF
Attenuation @ 100KHz
Reference level @ 600kHz
-3
-2
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 YCPB
1.6
2
2.4
V
DVDC
Head Switch Offset
-0.2
0
0.2
V
SHPB1
2nd Harmonic
Sinewave @ 4MHz, 0.4mV
PP
-45
-40
dB
RCST
Off-resistance on unused
channel
SW-S high
10
15
20
TRIV FUNCTION
TRIV0
Output Level (1)
No input signal
0
0.3
1
V
TRIV1
Output Level (2)
Sinewave @ 4MHz, 100mV
PP
@ YCPB
1.3
V
TRIV4
Output Level (3)
Sinewave @ 4MHz, 400mV
PP
@ YCPB
2.5
3.1
3.5
V
TRIV6
Output Level (4)
Sinewave @ 4MHz, 600mV
PP
@ YCPB
3.15
3.65
4.15
V
TRIV1 - TRIV0
0.5
1
V
SP/LP ENVELOPE DETECTOR
VENVCH
Output Level
4
4.5
5
V
VENVCL
Output Level
0
0.3
1
V
SENS1
Sensitivity
50
V
PP
to 600
V
PP
@ SP input pins
0.3
1
V
SENS2
Sensitivity
50
V
PP
to 600
V
PP
@ LP input pins
4
4.5
V
574
4A
-
04.
T
B
L
STV5744A
3/8
ELECTRICAL CHARACTERISTICS (T
amb
= 25
o
C, unless otherwise specified (continued)
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
68
91
115
mA
IHA0
DC Current through I
OUT
24
33
41
mA
IHA1
Fundamental
VRCY = 300mV
PP
@ 4MHz
30
32
34
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
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
k
RSAT
Output Stage Resistance
I = 10mA
5
10
50
IRN
AGC Capacitor downloading
Current
4.5V at CAGC Pin
160
A
IRP
AGC Capacitor uploading
Current
0.5V at CAGC Pin,
V
IN
= 300mV
PP
@ 4MHz
-165
A
SWITCHING LEVELS
VSWINL
SWIN Input Voltage
Selects head H2SP
0
0.8
V
VSWIN1
SWIN Input Voltage
Selects head H1SP
1.3
2.3
V
VSWIN2
SWIN Input Voltage
Selects head H1LP
2.8
3.8
V
VSWINH
SWIN Input Voltage
Selects head H2LP
4.3
5
V
ISWINH
SWIN Input Leakage Current
5V at SWIN input
0.5
A
ISWINL
SWIN Input Leakage Current
0V at SWIN input
-0.2
A
VSWRCH
SWRC Input Threshold
Selects record mode, 0 to 5V
3.2
3.4
3.8
V
VSWRCL
SWRC Input Threshold
Selects playback mode, 5 to 0V
3.1
3.35
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 YCPB
1.6
ms
t1
Delay from playback to record :
Signal disappears on Pin YCPB
22nF between Hi/Vi
1
s
t2
Delay from record to playback :
Signal appears on Pin YCPB
1.9
ms
t3
Delay from playback to record :
Signal appears on Pin I
OUT
VRCY = 300mV
PP
@ 4MHz
2
ms
t4
Delay from record to playback :
Signal disappears on Pin I
OUT
10
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
VSWST
SWS Input Threshold
3
V
ISWSH
SWS Input Leakage Current
5V at SWS Input
90
130
170
A
ISWSL
SWS Input Leakage Current
0V at SWS Input
-20
0
20
A
57
44A
-
0
5.
T
B
L
STV5744A
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