NTE NTE1268 Datasheet

NTE1268

Integrated Circuit

DC Servo Circuit for VCR

Description:

The NTE1268 is an integrated circuit in a 28–Lead DIP type package designed for DC Servo Control
Circuits in VCR’s.

Absolute Maximum Ratings

Supply Voltage (V
Power Dissipation, P

5–24

), V

D

: (TA = +25°C unless otherwise specified)

CC

Operating Temperature Range, T
Storage Temperature Range, T

Electrical Characteristics

Parameter Symbol Test Conditions Min Typ Max Unit

Total Circuit Current I
Trapezoidal Reference Voltage V
Output Voltage

FF–II

Trapezoidal I V
Trapezoidal II V
S & H–I V
S & H–II V
Gate–II V

Input Sensitivity

MM

Trapeziodal V
Gate V
S & H V
DET–I V
DET–II V
FG V
FF V

stg

: (TA = +25°C, VCC = 12V unless otherwise specified)

16–24

V

23–24
17–24
17–24
12–24
12–24
10–24

V

22–24
15–24

is(14)
is(28)

is(25)

opr

5–2

7–24

is(2)
is(4)

14.4V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

640mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–20° to +70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–40° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

23 31 41 mA

0.77 1.0 1.2 V

10.0 10.9 – V

2.4 3.0 3.6 V

11.0 11.9 – V
– 240 500 mV

8.0 8.8 – V

9.0 10.0 – V

3.5 – – V
4 – – V

3.5 – – V

f = 30Hz, PW = 100µs 1.5 – – V
400Hz, 1/2 Sampling Sine Wave, td = 1ms 50 – – mV

50 – – mV
f = 400Hz 100 – – mV
f = 30Hz, Rectangular Wave 3 – – V

O–P
O–P
O–P
O–P

O–P
O–P
P–P

O–P

Pin Connection Diagram

Ripple Filter

Detector 2 Input

Detector Time Constant

FG Amp Input

V

CC

Flip–Flop Output

Gate Time Constant

Ripple Filter

Motor Phase Signal Output

Bypass

Timing Signal Input

1
2
3
4
5
6
7Gate Input

8
9Gate Time Constant

11
12

13
14

28

Detector 1 Input
Detector Time Constant

27

Jumper to Pin22 & Pin25

26
25 Jumper to Pin22 & Pin26

GND Return

24

To Head Switch

23
22

Jumper to Pin25 & Pin26

21 Multi Time Constant

Multi Time Constant

20

GND10Motor Speed Signal Output

19
18

S & H Signal Source

17 Bypass
16 Resistive Constant

15 Timing Reference Signal

14 1

15 28

1.469 (37.32)
Max

.100 (2.54)

1.300 (33.02)

.250

(6.35)

.122

(3.1)

Min

.540

(13.7)

.600 (15.24)