mc1377 Freescale Semiconductor, Inc, mc1377 Datasheet - Page 3

• Manufacturer Part Number: mc1377
• Description: Color Television Rgb To Pal/ntsc Encoder
• Manufacturer: Freescale Semiconductor, Inc

ELECTRICAL CHARACTERISTICS
VIDEO INPUT
COMPOSITE VIDEO OUTPUT
Composite Output,
100% Saturation
(see Figure 8d)
NOTES: 1. Output Impedance can be reduced to less than 10
MOTOROLA ANALOG IC DEVICE DATA
R, G, B Input DC Levels
R, G, B Input for 100% Color Saturation
R, G, B Input: Resistance
R, G, B Input:
Sync Input Resistance (1.7 V < Input < 8.2)
Output Impedance (Note 1)
Subcarrier Leakage in Output (Note 2)
Chroma Out
NTSC/PAL
B–Y clamp
R–Y clamp
Chroma In
Symbol
V clamp
Osc out
CV out
Select
Osc in
–Y out
V CC
–Y in
Gnd
Sync
V B
R
G
B
t r
m
2. Subcarrier leakage can be reduced to less than 10 mV with optional circuitry (see Figure 12).
increase to about 60 mA.
Capacitance
Pin
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
Characteristics
External components at this pin set the rise time of the internal ramp function generator (see Figure 10).
Composite sync input. Presents 10 k resistance to input.
Red signal input. Presents 10 k impedance to input. 1.0 V pp required for 100% saturation.
Green signal input. Presents 10 k impedance to input. 1.0 V pp required for 100% saturation.
Blue signal Input. Presents 10 k impedance to input. 1.0 V pp required for 100% saturation.
Luma (–Y) output. Allows external setting of luma delay time.
Video Clamp pin. Typical connection is a 0.01 F capacitor to ground.
Luma (–Y) input. Presents 10 k input impedance.
Composite Video output. 50
Chroma input. Presents 10 k input impedance.
B–Y clamp. Clamps B–Y during blanking with a 0.1 F capacitor to ground.
Also used with R–Y clamp to null residual color subcarrier in output.
R–Y clamp. Clamps R–Y during blanking with a 0.1 F capacitor to ground.
Also used with B–Y clamp to null residual color subcarrier in output.
Chroma output. 50
Power supply pin for the IC; +12, 2.0 V, required at 35 mA (typical).
Ground pin.
8.2 V reference from an internal regulator capable of delivering 10 mA to external circuitry.
Oscillator input. A transistor base presents 5.0 k to an external subcarrier input, or is available for
constructing a Colpitts oscillator (see Figure 4).
Oscillator output. The emitter of the transistor, with base access at Pin 17, is accessible for completing the
Colpitts oscillator. See Figure 4.
Quad decoupler. With external circuitry, R–Y to B–Y relative angle errors can be corrected. Typically,
requires a 0.01 F capacitor to ground.
NTSC/PAL switch. When grounded, the MC1377 is in the NTSC mode; if unconnected, in the PAL mode.
Description
Sync
Luminance
Chroma
Burst
(V CC = 12 Vdc, T A = 25 C, circuit of Figure 7, unless otherwise noted.)
PIN FUNCTION DESCRIPTIONS
output impedance.
by using a 150
MC1377
output impedance.
output load from Pin 9 to ground. Power supply current will
3, 4, 5
Pins
2
9
Symbol
R video
R RGB
C RGB
CV out
RGB
Sync
V lk
Min
2.8
8.0
–
–
–
–
–
–
–
–
–
Typ
3.3
1.0
2.0
0.6
1.4
1.7
0.6
10
10
50
20
Max
3.8
17
–
–
–
–
–
–
–
–
–
mV pp
Unit
V pp
V pp
Vdc
k
k
pF
3