NTE NTE1845 Datasheet

NTE1845

Integrated Circuit

TV Video Processor

Description:

The NTE1845 is a small–sized multifunctional IC containing the “video, chroma, deflection” circuit of
NTSC color TV in a shrink type 30–Lead DIP package. Besides being small–sized, it has such fea­tures as greately reduced number of parts and fewer adjustments required. The device contains a
peak clip circuit and is well suited for use in small–sized sets.

Features:

D Small–Sized Package
D Minimum Number of Parts Required
D Fewer Adjustments Required
D Chroma V
D Horizontal OSC (H–Hold)
D Vertical OSC (V–Hold)
D Multifunction

CO

(APC)

Absolute Maximum Ratings

Maximum Supply Voltage, V
Maximum Supply Current, I
Allowable Power Dissipation (T
Operating Temperature Range, T
Storage Temperature Range, T

Recommended Operating Conditions

Recommended Supply Voltage, V
Recommended Supply Current, I

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

16(max)

22(max)

≤ +65°C), P

A

opg

stg

D(max)

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

16

22

–20° to +85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–55° to +125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating Voltage Range 9 to 14V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating Current Range 0.5 to 15.0mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

14V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

15.0mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1100mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical Characteristics: (TA = +25°C, V16 = 12V, I22 = 10mA unless otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Unit

Chroma

ACC Amplitude Characteristics ACC1 –3 0 +3 dB

ACC2 –7 0 +2 dB

ACC Phase Characteristics ACC∅1 – 0 ±3 deg

ACC∅2 – 0 ±7 deg

Maximum B–Y Demodulation Output B–Y max 5.0 – – V

P–P

Unicolor Amplitude Characteristics ∆GU – 17 – dB
Tint Change Range ∆T – 110 – deg
APC Pull–In Range f
Color Difference Output DC Voltage E
Color Difference DC Difference Voltage E

APC

RGB

∆

RGB

±300 – –

6.7 7.2 7.7 V
– – ±300 mV

R–Y Relative Demodulation Angle ∠R–Y/B–Y – 104 – deg
G–Y Relative Demodulation Angle ∠G–Y/B–Y – –122 – deg
R–Y Demodulation Ratio R–Y/B–Y – 0.9 –
G–Y Demodulation Ratio G–Y/B–Y – 0.3 –

Video

Video Tone Control Characteristics Gpmin –5 –3 –1 dB

Gpmax 12 15 18 dB
Video Voltage Gain VG 12 15 18 dB
Contrast Variable Range ∆GC – 18 – B
Frequency Response ∆GV f = 5MHz –5 – – dB

Synchronization, Deflection

Sync Separation Input DC Level V
Vertical Free–Running Frequency f
Vertical Blanking Pulse Width T

S.S

V

BL

– 9.3 – V
– fH/296.5 – Hz
– 19H –

Vertical Drive Stage Voltage Gain VG – 16 – dB
Horizontal Free–Running Frequency f
Horizontal Drive Output Pulse Width T
Horizontal Sync Pull–In Range f

PULL

H

H

– 15.734 – kHz
– 24.5 – µs

±400 – – Hz