Panasonic AN3275SB Datasheet

ICs for VCR

AN3275SB

CM detection IC for VCRs in the North American market

■ Overview

The AN3275SB is an IC which detects both a low
luminance of video signal and a low sound amplitude
based on

that is ADLE Inc.'s
patent of the CM detection technology. Using this IC and
a free memory area in a microcomputer, you can easily
carry out a CM detection for VCRs used in the North
America.

■ Features

• Video black detection

• Low sound detection

• Generation of various masking pulses

(Detecting H-mask, V-mask and envelope)

• Generation of the pulse (CLR pulse) for an event latch

• Usable for COMMERCIAL ADVANCE, MOVIE AD-

VANCE and CA-LITE

■ Applications

• Stand-alone VCR

■ Block Diagram

Unit: mm

+0.10

15.2±0.3

36 19

8.4±0.3

118

0.3±0.11 0.8
Seating plane

0.1±0.1

–0.05

0.2

11.93±0.3

1.30±0.25 1.30±0.25

2.85±0.2

SSOP036-P-0450A

0.5

GND36CA/MA SEL

35

Clamp

1

2

CC

V

HMW

V IN33C TRAP32CL CAP31CA V FIL30CA V LEV29MA V FIL28MA V LEV27N.C.26V DET25SYNC FIL24VS OUT23VMW22VMD21ENVH DET20ENVL DET

34

MA

3

RA IN

H mask

Amp. 2

4

PA IN

LPF

5

Clamp

MM3

H-DL

MM4

H-WD

LPF3

6

MA V LEV

Amp.

BP

Non-audio

7

MA A FIL

Sync.

sepa.

V mask

detect

CA

8

MA

CA A FIL

Black video

detect

H mask

CA

9

CA A LEV

V-sync.

E/V mask

Audio 1
Latch 2

MA

10

CA

sepa.

Counter

E/V mask

11

A DET

Video 1
Latch 2

MM2
V-WID

12

CLR IN

Counter

MM1
V-DL

V mask

Mix.

13

CLR OUT

E/V mask

ENV mask

14

ENV DET

ENV detector

15

16

PB FM IN

17

HSW IN

ENV ADJ.

19

18

Note) is a trademark registered by SRT, Inc., invented by Jerry Iggulden who closed a licensing contract under

the cooperation of Arthur D. Little Enterprises, Inc.

1

AN3275SB ICs for V CR

■ Pin Descriptions

Pin No. Symbol Description

1VCCSupply voltage (5 V typ.)
2 HMW

H-mask width period adjustment
3 RA IN Audio recording input
4 PA IN Audio playback input
5 A FIL Audio filter
6

MA A LEV

MOVIE ADVANCE audio

detection level adjustment

Pin No. Symbol Description

19

ENV L DET

PB FM envelope peak
detection (below)

20

ENV H DET

PB FM envelope peak

detection (upper)
21 VMD V-mask time delay adjustment
22 VMW V-mask width period adjustment
23 VS OUT Vertical sync. signal output

7 MA A FIL MOVIE ADVANCE audio

filter

8 CA A FIL COMMERCIAL ADVANCE

audio filter

9 CA A LEV COMMERCIAL ADVANCE

audio detection level adjustment
10 A DC Audio DC
11 A DET Audio detection latch output

  to a microcomputer

12 CLR IN E/V mask pulse input
13 CLR OUT E/V mask pulse output
14 ENV DET

PB FM envelope detection filter
15 PB FM IN PB FM envelope input
16 HEAD Head amp. switch pulse input

AMP SW

17 ENV ADJ. ENV mask level adjustment
18

V DET OUT

Video detection delay

adjustment

24 SYNC FIL Vertical sync. signal separation

filter

25 V DET Black picture detection output

to a microcomputer
26 N.C No connection
27 MA V LEV MA video detection level

adjustment
28 MA V FIL MA video filter control
29 CA V LEV CA video detection level

adjustment
30 CA V FIL CA video filter control

31 CL CAP Capacitor for clamping
32 C TRAP Chroma trap filter
33 VIN Video input
34 A REF Audio reference

35

CA/MA SEL

Selection of CA, MA

(CA-LITE)

  36 GND Signal processing circuit GND

■ Absolute Maximum Ratings

Parameter Symbol Rating Unit

Supply voltage V
Supply current I

2

Power dissipation
Operating ambient temperature
Storage temperature

Note)*1: Except for the power dissipation, operating ambient temperature, and storage temperature, all ratings are for Ta = 25°C.

2: The power dissipation shown is for the IC package at Ta = 70°C.

*

*

1

*

1

*

CC

CC

P

D

T

opr

T

stg

2

5.5 V
35 mA

450 mW

−20 to +70 °C

−55 to +125 °C

ICs for VCR AN3275SB

■ Recommended Operating Range

Parameter Symbol Range Unit

Supply voltage V

CC

■ Electrical Characteristics at VCC = 5.0 V, Ta = 25°C

Parameter Symbol Conditions Min Typ Max Unit

Supply current I
CA mode hold voltage V
CL SLP mode hold voltage V
CL SP,MA mode hold voltage V
Pin 32 output impedance R
Pin 5 output impedance R
VSS pulse high level V
VSS pulse low level V
CLR pulse high level V
CLR pulse low level V
Video det. output high level V
Video det. output low level V
Audio det. output high level V
Audio det. output low level V

1

Black det. level 1 (CA mode)

Black det. level 2 (CA mode)

*

V

1

*

V

Non-audio detection level 1 A
(CA mode) Pin 7: 47 kΩ to GND, fIN = 1.0 kHz

Non-audio detection level 2 A
(MA mode) Pin 7: 47 kΩ to GND, fIN = 5 kHz

Black detection adjustment V

1

*

range 1
Black detection adjustment V

1

*

range 2
Non-audio A

detection adjustment range 1 Pin 9 = DC, sweep, fIN = 1.0 kHz
Non-audio A

detection adjustment range 2 Pin 6 = DC, sweep, fIN = 5 kHz
V-mask delay t

V-mask width t

Note)*1: The unit which stands for the ratio of the video signal amplitude to a total amplitude. 140IRE = 2.1 V[p-p]

MA mode  21 28 mA

CC

35H

35M

35L

32

5

Outoput 23, with 10 kΩ to GND 4.0  V

23H

Outoput 23, with 10 kΩ to V

23L

Outoput 13, with 10 kΩ to GND 4.0  V

13H

Outoput 13, with 10 kΩ to V

13L

Outoput 25, with 10 kΩ to GND 4.0  V

25H

Outoput 25, with 10 kΩ to V

25L

Outoput 11, with 10 kΩ to GND 4.0  V

11H

Outoput 11, with 10 kΩ to V

11L

Input 33, output 25 10.5 13 15.5 (IRE)

DET1

Video signal: 140IRE = 2.1 V[p-p]
Input 33, output 25 8.5 11 13.5 (IRE)

DET1

Video signal: 140IRE = 2.1 V[p-p]
Input 3, output 11 56 76 96

DET1

Input 4, output 11 1.8 3.6 5.4

DET2

Input 33, output 25, pin 29 = DC, 7  28 (IRE)

AD1

sweep: 140 IRE = 2.1V[p-p]
Input 33, output 25, pin 27 = DC, 7  28 (IRE)

AD2

sweep: 140 IRE = 2.1V[p-p]
Input 3, output 11 50  100

AD1

Input 4, output 11 2.4  5.2

AD2

Input 33, output 13 1.65 1.95 2.25 ms

VD

Delay from VSS: 0.1 uF, pin 21: 0.1 µF
Input 33, output 13, pin 22: 0.22 µF

VW

4.75 to 5.25 V

 3.5  5.0 V
 1.75  3.0 V
 0  1.25 V
 1 830 2 030 2 230 Ω
 4 505 5 005 5 505 Ω

CC

CC

CC

CC

0.5 V

0.5 V

0.5 V

0.5 V

mV[p-p]

mV[p-p]

mV[p-p]

mV[p-p]

11 12.5 14 ms

3

AN3275SB ICs for V CR

■ Electrical Characteristics at VCC = 5.0 V, Ta = 25°C (continued)

Parameter Symbol Conditions Min Typ Max Unit

H-mask delay t
H-mask width t
ENV detection level SE Input 15, output 13, − 5.5 − 7.5 − 9.5 dB

• Design reference data

Note) The characteristics below are theoretical values based on the IC design and are not guaranteed.

Parameter Symbol Conditions Min Typ Max Unit

Black detection block

Pin33 sync. DC level V

Chroma trap frequency f
characteristics

LPF2 frequency characteristics f

1

Pin 30 output dynamic range

*

V

Pin 30 pedestal DC level V

Pin 28 output dynamic range

*

V

1

Pin 28 pedestal DC level V

Masking level DC offset ∆V

Black detection hysteresis ∆V

HSS,VSS block

Sync. separation minimum input S
sensitivity

HSS front edge delay t

VSS front edge delay t
VSS pulse width t

DHSS

DVSS

WVSS

Non-audio detection block

LPF3 frequency characteristics f

Pin 7 output dynamic range ∆V7Input 4, output 7  5.0 

Note)*1: The unit which stands for the ratio of the video signal amplitude to a total amplitude. 140IRE = 2.1 V[p-p]

Input 33, output 30, delay from HSS

HD

Input 33, output 30, pin 2: 2 700 pF

HW

10.5 12.5 14.5 µs
30 34 38 µs

VIN = 200 mV[p-p]

Input 33, output 33  1.8  V

SY33

Pin 33: 1.0 µF, 140IRE = 2.1 V[p-p]
Input 33, output 30 − 35  dB

V2

Ratio of pin 30 = 500 kHz to 3.58 MHz
Input 33, output 30 − 3.0  dB

V3

Ratio of pin 30 = 500 kHz to 1.0 MHz
Input 33, output 30  30  (IRE)

30

Pin 30: 10 kΩ to GND
Input 33, output 30  1.6  V

PD30

Pin 30: 10 kΩ to GND
Input 33, output 28  30  (IRE)

28

Pin 28: 10 kΩ to GND
Input 33, output 28  1.6  V

PD28

Pin 28: 10 kΩ to GND
Input 33, output 28 − 2.0 0.0 0.2 V

PD

Pin 28: 10 kΩ to GND, pin 2 = GND
Input 28, output 18 105 130 155

VCN

Pin 28 = triangular wave

Input 33, output 24  40  %

HSS

Pin 33: VIN = 2.1 V[p-p], white 100%
HSS front edge delay from  1.0 µs

input 33, output 24, pin 33
Input 33, output 23  25 µs
Input 33, output 23  215 µs

Input 4, output 7 −3  dB

A1

Ratio of pin 7 = 5 kHz to 15 kHz

mV[p-p]

mV[p-p]

4

ICs for VCR AN3275SB

0 V

3.5 V

HSS

■ Electrical Characteristics at VCC = 5.0 V, Ta = 25°C (continued)

• Design reference data (continued)

Note) The characteristics below are theoretical values based on the IC design and are not guaranteed.

Parameter Symbol Conditions Min Typ Max Unit

Envelope detection block

ENV detection adjustment range E

ENV detection hysteresis ∆V

SP ENV pulse front edge delay t

SP ENV pulse width t

DHSW

WSHW

SP ENV pulse hysteresis ∆V

■ Terminal Equivalent Circuits

Pin No. Equivalent circuit Impedance Signal waveform DC (V)

1V

CC

Input 15, output 13 −3 +3dB

AD

VIN = pin 15, 200 mV[p-p]
Input 15, output 13  1.7  dB

ENON

VIN = pin 15, 200 mV[p-p]
Input 16, output 13  0.4 µs

VIN = rectangular wave, 0 V to 5 V 300 Hz
Input 16, output 13  570 µs

VIN = rectangular wave, 0 V to 5 V 300 Hz
Input 16, output 13  80 

HSON

VIN = triangular wave, 2 V[p-p] 300 Hz

5.0

mV[p-p]

2 HMW Current output 

2

200 Ω

HSS on

3 RA IN (CA) 10 kΩ 2.3

10 kΩ 200 Ω

Sin wave

3

5