Page 1
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Page 2
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
Page 3
Pin Connection Diagram
nd
2
BPA
Sharp Video
Soft Video
Contrast
Contrast VR
Brightness VR
B – Y
Color Killer
Tint Control
1
2
3
4
5
6Pedestal Clamp
7Brightness Control
8
30
29
28
27
26
25
24
23
9R – Y 22
10G – Y
11
21
20
12 19
13 18
14VCO 17
15APC 16
st
BPA
1
ACC
GND
Sync Separator
Burst Gate Pulse
Vert Sync Separator
Ramp Generator
Vert Driver
(+) BH (110V)
AFC
(+) B
H
Horiz OSC
X–Ray Protect
Horiz Pre–Driver
Output
V
CC
30 16
115
1.066 (27.0)
.388 (8.6)
.200
(5.08)
Max
.070 (1.78)
.125 (3.17)
.400 (10.16)
Loading...