NTE NTE1425

NTE1425
Integrated Circuit
Capstan Servo Control Circuit for VCR
Features:
D Phase Control Circuit
D Speed Control Circuit
D Capstan FG Divider Ratio Change Circuit
D Sample Hold System Speed Control
D Supply Voltage, Either 9V or 12V
Absolute Maximum Ratings: (TA = +25°C, unless otherwise specified)
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14V
Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 470mW
Operating Temperature Range, Topg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20° to +70°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40° to +150°C
Electrical Characteristics: (TA = +25°C, VCC = 12V unless otherwise specified)
Parameter
Circuit Current
Symbol
Test Conditions
Min
Typ Max
Unit
I1
16
−
34
mA
S(1)
50
−
−
mVo−p
S(2)
7
−
−
Vo−p
Reference Voltage
VREF(1)
2.7
−
3.7
V
Voltage High Level (S/H1)
VOH(1)
9
−
−
V
Voltage Low Level (S/H1)
VOL(1)
−
−
600
mV
Sensitivity Output
(FG Amp In)
S(3)
100
−
−
mVp−p
(FF 2 Switch)
S(4)
5
−
−
V
Reference Voltage
VREF(2)
2.7
−
3.7
V
Voltage High Level (S/H2)
VOH(2)
9
−
−
V
Voltage Low Level (S/H2)
VOL(2)
−
−
600
mV
Sensitivity
(PG Amp In)
(In)
Pin Connection Diagram
From Capstan
Frequency Generator
From Video Head
Servo Control
Decoupled/Switched
Recorded VCC
(+) VCC
1
16
SP:L/LP:H Switch
2
15
Decouple VCC
3
14
Equalization
Network
4
13
PG Input
Bias Res (5.6kΩ)
5
12
Bypass Cap (0.33µF)
Bypass Cap (0.1µF)
6
11
Bias Res (10kΩ)
S & H Output
(Speed Control)
7
10
Bypass Cap (0.1µF)
GND
8
9
S & H Output
(Speed Control)
16
9
.260 (6.6) Max
1
8
.785 (19.9)
Max
.300
(7.62)
.200 (5.08)
Max
.245
(6.22)
Min
.100 (2.54)
.700 (17.7)