Order this document by MC13280AY/D
MC13280AY
MC13281A/B
Advance Information
80/100 MHz Video Processor
The MC13280AY and MC13281A/B are three channel wideband amplifiers
designed for use as a video pre–amplifier in high resolution RGB color
monitors.
Features:
80/100 MHz VIDEO
PROCESSOR
•
•
•
•
•
•
•
•
4.0 Vpp Output Swing
3.5 ns Rise/Fall Time, 100 MHz Bandwidth (MC13281A/B)
4.3 ns Rise/Fall Time, 80 MHz Bandwidth (MC13280AY)
Subcontrast Controls for Each Channel
Main Contrast Control
Blanking and Clamping Inputs
Packages: NDIP–24 and NDIP–20
A Single PC Board Pattern Can Accept the MC13281A and the
MC13282A (Video Amplifier with OSD)
20
1
24
1
P SUFFIX
PLASTIC PACKAGE
CASE 724
P SUFFIX
PLASTIC PACKAGE
CASE 738
ORDERING INFORMATION
Device
MC13280AYP
MC13281AP
MC13281BP
TA = 0° to +70°C
Operating
Temperature Range
Package
Plastic DIP
Plastic DIP
Plastic DIP
PIN CONNECTIONS
R Subcontrast 1
R Input 2
G Subcontrast 3
G Input 4
B Input 6
Gnd 7
N/C 8
VCC 9
MC13281A
(Top View)
R Subcontrast 1
R Input 2
G Subcontrast 3
G Input 4
B Subcontrast 5
B Input 6
Gnd 7
VCC 8
Contrast 9
Fast Commutate 10
(Top View)
MC13280AY
MC13281B
20 Blank
19 Clamp
18 R Emitter
17 R Clamp
16 V5
15 G Emitter
14 G Clamp
13 Video VCC
12 B Clamp
11 B Emitter
B Subcontrast 5
24 Blank
23 Clamp
22 R Emitter
21 R Clamp
20 V5
19 G Emitter
18 G Clamp
17 Video VCC
16 B Clamp
15 B Emitter
14 Fast Commutate
13 Contrast
ABSOLUTE MAXIMUM RATINGS
Rating
Power Supply Voltage
Voltage at Video Amplifier Inputs
Collector–Emitter Current (Three Channels)
Storage Temperature
Junction Temperature
Pin
VCC
Video VCC
2, 4, 6
Video VCC
–
–
Value
–0.5, 10
–0.5, 10
–0.5, +5.0
120
–65 to +150
150
Unit
Vdc
Vdc
mA
°C
°C
N/C 10
N/C 11
N/C 12
NOTES:
1. Devices should not be operated at these limits. Refer to “Recommended
Operating Conditions” section for actual device operation.
2. ESD data available upon request.
This document contains information on a new product. Specifications and information herein
are subject to change without notice.
©
Motorola, Inc. 1996
Rev 0
MOTOROLA ANALOG IC DEVICE DATA
1
MC13280AY MC13281A/B
RECOMMENDED OPERATING CONDITIONS
Characteristic
Power Supply Voltage
Contrast Control
Subcontrast Control
Blanking Input Signal Amplitude
Clamping Input Signal Amplitude
Video Signal Amplitude
(with 75
Ω
Termination)
Collector–Emitter Current (Total for Three
Channels)
Clamp Pulse Width
Operating Ambient Temperature
Pin
VCC,
Video VCC
Contrast
1, 3, 5
Blank
Clamp
2, 4, 6
Video VCC
Clamp
–
Min
7.6
0
0
0
0
–
0
500
0
Typ
8.0
–
–
–
–
0.7
–
–
–
Max
8.4
5.0
5.0
5.0
5.0
1.0
50
–
70
Unit
Vdc
Vdc
Vdc
V
V
Vpp
mA
ns
°C
ELECTRICAL CHARACTERISTICS
(Refer to Test Circuit Figure 1, TA = 25°C, VCC = 8.0 Vdc.)
Characteristic
Input Impedance
Internal DC Bias Voltage
Output Signal Amplitude
Voltage Gain
Contrast Control
Subcontrast Control
Emitter DC Level
Blanking Input Threshold
Clamping Input Threshold
Video Rise Time
MC13280AY
MC13281A/B
Video Fall Time
MC13280AY
MC13281A/B
Video Bandwidth
MC13280AY
MC13281A/B
Power Supply Current
NOTE:
Condition
–
Pin
2, 4, 6
Min
100
–
Typ
–
2.4
4.0
5.6
–26
–26
1.2
1.25
3.75
4.3
3.5
4.3
3.5
80
100
70
Max
–
–
–
–
–
–
1.4
–
–
–
–
Unit
kΩ
Vdc
Vpp
V/V
dB
dB
Vdc
V
V
ns
V2, V4, V6 = 0.7 Vpp
V1, V3
V1 V3, V5 = 5 0 V
5.0
Contrast = 5.0 V
Contrast = 5.0 to 0 V
V1, V3, V5 = 5.0 V
V1, V3, V5 = 5.0 to 0 V
Contrast = 5.0 V
–
–
–
V2, V4, V6 = 0.7 Vpp
Vout = 4.0 Vpp
RL > 300
Ω,
CL < 5.0 pF
V2, V4, V6 = 0.7 Vpp
Vout = 4.0 Vpp
RL > 300
Ω,
CL < 5.0 pF
V2, V4, V6 = 0.7 Vpp
V1, V3, V5, Contrast = 5.0 V
RL > 300
Ω,
CL < 5.0 pF
VCC, Video VCC = 8.0 V
R, G, B
Emitters
Contrast
1, 3, 5
–
Blank
Clamp
R, G, B
Emitters
R, G, B
Emitters
R, G, B
Emitters
–
3.6
–
–
–
1.0
–
–
–
–
–
–
–
–
–
ns
–
–
MHz
–
–
–
mA
It is recommended to use a double sided PCB layout for high frequency measurement (e.g., rise/fall time, bandwidth).
2
MOTOROLA ANALOG IC DEVICE DATA
MC13280AY MC13281A/B
Figure 1. Internal Block Diagram
Fast Commutate
Vref1
Vref2
R Clamp
Video VCC
R Input
R Emitter
R Subcontrast
Contrast and Subcontrast
Control Processor
R Channel
G Clamp
Contrast
Vref1
Vref2
G Input
G Emitter
Blank
Clamp Blank
Decoder
G Subcontrast
Contrast and Subcontrast
Control Processor
Clamp
G Channel
B Clamp
Vref1
Vref2
B Input
B Emitter
VCC
B Channel
V5
B Subcontrast
Contrast and Subcontrast
Control Processor
Gnd
This device contains 272 active transistors.
MOTOROLA ANALOG IC DEVICE DATA
3
MC13280AY MC13281A/B
PIN FUNCTION DESCRIPTION
MC13280AY
MC13281B
Pin
1
MC13281A
Pin
1
Name
R
Subcontrast
Control
G
Subcontrast
Control
B
Subcontrast
Control
R Input
Equivalent Internal Circuit
VCC
50 k
Description
These pins provides a maximum of
26 dB attenuation to vary the gain of
each video amplifier separately.
Input voltage is from 0 to 5.0 V.
Increasing the voltage will increase
the contrast level.
3
3
5.0 V
5
5
2
2
Vref
4
4
G Input
0.1
75
Ω
6
6
B Input
Cl
Clamp
5.0 V
The input coupling capacitor is used
for input clamping storage. The
maximum source impedance is 100
Ω.
I
t l it f th id
i
li
Input polarity of the video signal is
positive.
Nominal 0.7 Vpp input signal is
recommended (maximum 1.0 Vpp).
1 0 Vpp)
10 k
1.0
10k
7
N/A
7
8
10
11
12
Ground
N/C
N/C
N/C
N/C
VCC
Contrast
5.0 V
42 k
2.0 k
2.5 V
Ground pin. Connect to a clean, solid
ground.
Connected to ground.
8
9
9
13
Connect to 8.0 Vdc supply,
±5%.
Decoupling is required at this pin.
Overall Contrast Control for the three
channels.
The input range is 0 V to 5.0 V. An
increase of voltage increases the
contrast.
10
11
14
15
Fast
Commutate
B Emitter
Output
G Emitter
Output
R Emitter
Output
Video
Signal
Contrast
RE = 330
Typical
VCC
Must be connected to ground.
The video outputs are configured as
emitter–followers with a driving
capability of about 15 mA each.
The dc voltage at these three emitters
is set to 1.2 V (black level).
The dc current through the output
stage is determined by the emitter
resistors (typically 330
Ω).
15
19
18
22
4
MOTOROLA ANALOG IC DEVICE DATA
MC13280AY MC13281A/B
PIN FUNCTION DESCRIPTION (continued)
MC13280AY
MC13281B
Pin
12
MC13281A
Pin
16
Name
B Clamp
Capacitor
G Clamp
Capacitor
R Clamp
Capacitor
Video VCC
Equivalent Internal Circuit
Description
A 100 nF capacitor is connected to
each of these pins.
The capacitor is used for video output
dc restoration.
1.2 V
Video Out
VCC
14
18
17
21
13
17
Connect to 8.0 V dc supply,
±5%.
The
VCC is for the video output stage. It is
internally connected to the collectors
of the output transistors.
VCC
Band Gap
Regulator
5.0 V regulator. Minimum 10
µF
capacitor is required for noise filtering
and compensation. It can source up
to 20 mA but not sink current. Output
impedance is
≈
10
Ω.
Recommended
for use as a voltage reference only.
16
20
5.0 Vref (V5)
5.0 V
10
µF
R
0.8 R
19
23
Clamp
VCC
Vref2
10 k
Vref1
30 k
This pin is used for video clamping.
The threshold clamping level is 3.75 V.
3.75 V
20
24
Blank
VCC
Vref2
10 k
Vref1
30 k
This pin is used for video blanking.
The threshold blanking level is 1.25 V.
1.25 V
MOTOROLA ANALOG IC DEVICE DATA
5
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