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MFG:TOSHIBA Package Cooled:DIP
Part Number: TB1245N
MFG: TOSHIBA
Package Cooled: DIP
Description: TB1245N that is a signal processing IC for the PAL / NTSC / SECA...
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TB1245N
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DataSheet
General Description
TB1245N General Description
TB1245N that is a signal processing IC for the PAL / NTSC / SECAM color TV system integrates video, chroma and synchronizing signal processing circuits together in a 56pin shrink DIP plastic package.
TB1245N incorporates a high performance picture quality compensation circuit in the video section, an automatic PAL / NTSC / SECAM discrimination circuit in the chroma section, and an automatic 50 / 60 Hz discrimination circuit in the synchronizing section. Besides a crystal oscillator that internally generates 4.43 MHz, 3.58 MHz and M / N-PAL clock signals for color demodulation, there is a horizontal PLL circuit built in the IC.
The PAL / SECAM demodulation circuit which is an adjustment-free circuit incorporates a 1H DL circuit inside for operating the base band signal processing system.
Also, TB1245N makes it possible to set or control various functions through the built-in I2C bus line.
TB1245N Maximum Ratings
|
CHARACTERISTIC |
SYMBOL |
RATING |
UNIT |
| Supply Voltage |
VCCMAX |
12 |
V |
| Permissible Loss |
PDMAX |
2190 (Note 1) |
mW |
| Power Consumption Declining Degree |
1 / Qja |
17.52 |
mW / |
| Input Terminal Voltage |
Vin |
GND − 0.3~VCC + 0.3 |
V |
| Input Signal Voltage |
ein |
7 |
Vp-p |
| Operating Temperature |
Topr |
−20~65 |
|
| Conserving Temperature |
Tstg |
−55~150 |
Note 1: In the condition that IC is actually mounted. See the diagram below.
Note 2: This IC is not proof enough against a strong E-M field by CRT which may cause function errors and / or poor
characteristics.
Keeping the distance from CRT to the IC longer than 20 cm, or if cannot, placing shield metal over the IC, is
recommended in an application.
TB1245N Features
` Video section
` Built-in trap filter
` Black expansion circuit
` Variable DC regeneration rate
` Y delay line
` Sharpness control by aperture control
` correction
` Chroma section
` Built-in 1 H Delay circuit
` PAL base band demodulation
` One crystal color demodulation circuit
` Automatic system discrimination
` Built-in band-pass filter
` Color limiter circuit
` Synchronizing deflecting section
` Built-in horizontal VCO resonator
` Adjustment-free horizontal / vertical oscillation By count-down circuit
` Double AFC circuit
` Vertical frequency automatic discrimination circuit
` Horizontal / vertical holding adjustment
` Vertical ramp output
` Vertical amplitude adjustment
` Vertical linearity / S-shaped curve adjustment
` E / W output
` Text section
` Linear RGB input
` OSD RGB input
` Cut / off-drive adjustment
` RGB primary signal output
TB1245N
PDF/DataSheet Download
- Datasheet: TB1245N
- File Size: 1098995 KB
- Manufacturer: TOSHIBA [Toshiba Semiconductor]
- Click here to Download
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