NTE NTE1805 Datasheet

NTE1805

Integrated Circuit

Recording Video Signal Processing Circuit

Description:

The NTE1805 i s a n i ntegrated c ircuit i n a 2 8–Lead D IP t ype p ackage d esigned f or u se i n V CR r ecording
video signal processing.

Features:

D Dynamic Emphasis Characteristics: 5.5dB (at f = 1MHz, input level = –20dB)
D Built–In Carrier Interleaving Circuit
D Built–In Low Pass Filter (Sync–Separation Circuit)
D Supply Voltage: V

Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Supply Voltage, V

CC

Power Dissiption (T
Operating Ambient Temperature Range, T
Storage Temperature Range, T

= 5V

CC

= +70°C), P

A

stg

6V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

D

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

opr

250mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–55° to ∼+150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical Characteristics: (VCC = 5V, TA = +25°C unless otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Unit

Circuit Current I

AGC Output Amplification u
AGC Control Sensitivity Du
Playback Amp Gain G
12dB Amp Gain G
FM Oscillation Frequency f
FM Output 2nd High Frequency 2f
FM Oscillation Output Amplification u
Frequency Control Sensitivity

FM Oscillation

15–16

b

20

6–8

Pin12 High (Record) 14.5 – 35.5 mA
Pin12 Open (Playback) 14.5 – 35.5 mA
Pin12 High, Video Input 1V

8

Pin12 High, Video Input 0.5 to 2V

8

Pin12 Open 6.8 – 9.9 dB

Pin12 High, CO = 39pF, RO = 12kΩ 2.9 – 3.9 MHz

o

o

28

Pin12 High, CO = 39pF, RO = 8.2 to 15kΩ 11.4 – 14.5 kHz/µA

28

P–P

P–P

0.4 – 0.8 V
– – 1.5 dB

10.4 – 13.4 dB

– – –33 dB

0.65 – 1.35 V

Note 1. Operating Supply Voltage Range: VCC = 4.5V to 5.5V.

P–P

P–P

Electrical Characteristics (Cont’d): (VCC = 5V, TA = +25°C unless otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Unit

Sync Separator Input Sensitivity S
Sync Separator Output Amplification u
NL Limiter Gain u
NL Limiter Output Amplification u

NC Limiter Gain u
NC Limiter Output Amplification u
EE Amp Gain G
VV Amp Gain u
Chroma Amp Gain G
EE/VV Crosstalk CT
Mute Crosstalk CT’
EE/VV Changeover Sensitivity S
FM Oscillation Carrier Interleave Df
V Offset Du

17–21

14–10

19–10

12–10

8–10

19–10

19–10

19−10

Video Input V/S = 5/2 0.45 – – V

19

Video Input V/S = 5/2 4.3 – – V

2

Pin12 High 20 – 40 mV
Pin12 High 26 – 64 mV

21

Pin12 High, Pin18 Low 6.0 – 2.6 mV
Pin12 Open 30 – 70 mV
Pin12 Open 65 – 125 mV

10

Pin12 High 9.7 – 11.6 dB
Pin12 Open 1.65 – 2.15 V

E y 4V
Pin12 Low, Pin11 High – – –40 dB

12

Pin12 High 5.9 – 9.9 kHz

o

Pin12 Low 30 – 110 mV

Note 1. Operating Supply Voltage Range: VCC = 4.5V to 5.5V.

P–P
P–P

P–P
P–P
P–P
P–P
P–P

P–P

5.3 – 8.8 dB
– – –40 dB

4 – – V

Pin Connection Diagram

Sync Tip Level Detect

Sync Output

EE Level Adjust

Video Signal Input During Recording

AGC Detector

Video Signal Input During Playback

Sub Clamp Output

GND

EE/VV Output

Dummy Sync Pulse Input

PB Chroma Input

Noise Canceller L.P.F.

Noise Canceller H.P.F. Side Input

1
2
3
4
5
6
7Sub Clamp Detector
8

9
10
11

28
27
26
25
24
23
22
21
20
19

18
12 17
13
14

16

15

FM Output
White Clip Level Adjustment
Mod

Mod
Dark Clip Level Adjustment
Mod Input

FB Amp Input
Main Emphasis Output
V

CC

Main Clamp Input
PG Input & 2/4/6 Hour Select

Non–Linear Emphasis Sub–Side Input
12dB Amp Output

12dB Amp Input