NTE NTE1800 Datasheet

NTE1800

Integrated Circuit

TV Multiplex Sound Decoder

Description:

The NTE1800 Multiplexed Sound Decoder is a linear integrated circuit in a 30–Lead DIP type package
that incorporates the SAP demodulation and the L, R matrix circuits required to demodulate multi­plexed sound signals on the US NTSC system.

The N TE1800 a lso f eatures m ode s witching t o f acilitate the u se o f remote c ontrol, a nd can b e interfaced
easily to the NTE1801 dbx Noise Reduction Decoder IC.

Features:

D Mode switching for remote control
D Built–in muting function
D Pilot cancel circuit
D 8.0 to 13.2V power supply
D 300mV
D 30–pin plastic shrink DIP
D Easily interfaced to the NTE1801

Functions:

D Pilot signal
D SAP signal
D Stereo demodulation
D SAP demodulation
D Mode switching
D Stereo and SAP display drivers
D Pilot canceler
D On–chip 4fH V
D On–chip 5fH V

(MONO) composite signal input voltage

rms

CO
CO

Absolute Maximum Ratings:

Power Supply Voltage, VCCmax 15V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input Signal Voltage, V
Control Signal Voltage, V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

in

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

in

Power Dissipation (TA ≤ +70°C), PDmax 800mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lamp Driver Current, I
Operating Temperature Range, T
Storage Temperature Range, T

lamp

stg

opg

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

–40° to +125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Recommended Operating Conditions: (TA = +25°C unless otherwise specified)
Power Supply Voltage, V

CC

Composite Signal Voltage, V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

in

8 to 13.2V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

300mV

5V
5V

30mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

p–p
p–p

rms

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

Parameter Symbol Test Conditions Min Typ Max Unit

Circuit Current I

CC

Stereo Capture Range CC

VCC = 12V, no signal 27 39 52 mA
Stereo demodulation input pin 30mV

1

rms

pilot signal level

Stereo Switch Input Sensitivity SWsense Measure pilot level at stereo demodulation

input. Stereo lamp OFF→ON

Stereo Switch Hysteresis Hy

Pilot level measured at stereo demodulation

1

input. Stereo lamp ON→OFF, OFF→ON

Stereo Switch L–R Output

Voltage

Stereo Demodulation Output

L+R Output Voltage

L+R Output Voltage Pilot

Cancel Level

L–R Output Distortion THDL–R 150mV

VoL–R 150mV

input voltage

VoL+R 150mV

input voltage

fH

REJ

150mV
input voltage

(MONO) stereo demodulation

rms

(MONO) stereo demodulation

rms

(MONO) stereo demodulation

rms

(MONO) stereo demodulation

rms

input voltage, f = 1kHz

L +R Output Distortion THD L+R 150mV

(MONO) stereo demodulation

rms

input voltage, f = 1kHz
SAP Capture Range CC
SAP Sensitivity SAP

SENSE

90mV

2

SAP input voltage ±19 ±25 – %

rms

Measure SAP input level. SAP lamp

OFF→ON

±1.5 ±3.0 – %

12 18 22 mV

5 7 9 dB

380 430 480 mV

380 430 480 mV

30 35 – dB

– 0.2 0.7 %

– 0.2 0.7 %

25 35 45 mV

rms

rms

rms

rms

SAP Switch Hysteresis Hy

Measure SAP input level. SAP Lamp

2

2.5 4.5 6.5 dB

OFF→ON, ON→OFF
SAP Output Distortion THD

SAP

90mV

SAP input voltage, f = 1kHz,

rms

– 0.3 1.0 %

∆f = 10kHz
SAP Output Voltage V

oSAP

90mV

SAP input voltage, f = 1kHz,

rms

380 430 480 mV

∆f = 10kHz
Mode Switch Crosstalk CT 150mV
L,R Matrix Separation SEP 150mV
Matrix Output Voltage (MONO) V

OMONO

Matrix Output Voltage (STEREO) V
Matrix Output Voltage (STEREO) V

OL
OR

215mV

215/2mV matrix input. Same phase input 450 500 550 mV

215/2mV

stereo input, 90mV

rms

(MONO) composite input 30 40 – dB

rms

matrix input. Same phase input 450 500 550 mV

rms

matrix input. Reverse phase

rms

SAP input 45 60 – dB

rms

450 500 550 mV

input
Matrix Output Voltage (SAP) V

OMSAP

215mV

matrix input. 450 500 550 mV

rms

Matrix Output Voltage (MUTE) MUTE Pin17 Open – –70 –60 dB

rms

rms
rms
rms

rms