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PDF TB1254N Data sheet ( Hoja de datos )
| Número de pieza | TB1254N | |
| Descripción | PAL / NTSC / SECAM 1 Chip IC | |
| Fabricantes | Toshiba | |
| Logotipo |  |
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TENTATIVE TOSHIBA Bi-CMOS INTEGRATED CIRCUIT, SILICON MONOLITHIC
TB1254N
PAL / NTSC / SECAM 1CHIP (IF+VCD PROCESSOR) IC
The TB1254N is a TV signal processor IC, which contains
PIF, SIF, Video, Chroma and deflection signal processors
for worldwide Multi-color systems. Also, it has AV switch
for TV/EXT inputs.
The line-up and flexibility of this TB1251 series contributes
to reduce development costs and components in a TV
sets.
SDIP56-P-600
Weight: 5.55g (typ)
FEATURES
IF STAGE
Multi-system IF
SIF 4.5 ~ 6.5 MHz
One External BPF for Multi-SIF carrier
Inter carrier inputs
VCO tank coil alignment free
for L system,
Positive demodulation
V low Ch
VIDEO STAGE
Built-in Y delay line (8 adjustable steps)
Built in C trap filter (Switchable)
TEXT STAGE
Built-in AKB
AKB on/off
AKB Color temperature control
Analog RGB interfaces
ABL / ACL
DEFLECTION STAGE
Built-in H-VCO
ramp distortion correction
Stand Along Sync in port
Sand Castle Pulse Output
(HD+VD+Gate Pulse)
CHROMA STAGE
Multi-color Demoduration
Automatic Chroma Identification
1 Xtal for Multi-color Systems
(3.58MHz/4.43MHz/M-PAL/N-PAL)
Built-in1H Delay line
Cb/Cr input ports
Built-in BPF / TOF
Fsc Output
Two NTSC demodulation phase
AV SWITCH
Visual TV / EXT inputs
Audio TV / EXT inputs
TOSHIBA is continually working to improve the quality and the reliability of its products. Nevertheless,
semiconductor devices in general can malfunction or jail due to their inherent electrical sensitivity and
vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to
observe standards of safety, and to avoid situations in which a malfunction or failure of a TOSHIBA product could
cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that
TOSHIBA products are used within specified operating range as set forth in the most recent products specifications.
Also, please keep in mind the precautions and conditions set forth in the TOSHIBA Semiconductor Reliability
Handbook.
The products described in this document are subject to foreign exchange and foreign trade control laws.
The information contained herein is presented only as a guide for the applications of our products. No
responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other rights of
th thi d ti hi h
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PIN NAME
FUNCTION
14 RGB VCC (9V) A Vcc terminal for RGB block, PIF det. Output
and sound output circuit.
Supply 9V.
15 YS/YM SW
A terminal for switching of EXT RGB Mode
•Spot killer
and fast Half tone.
INTERFACE
•
42
15
250Ħ
3.3V
0.7V
16 EXT. R IN
17 EXT. G IN
18 EXT. B IN
19 Y/C GND
20 R OUT
21 G OUT
22 B OUT
23 IK IN
Input terminals for EXT RGB signals. The
signals are clamped by capacitors, therefore
the input impedance should be low, 100
ohms or less is recommended.
For this input, brightness and RGB contrast
are available, also ABL/ACL eliminate the
output leval. This ABL/ACL is able to off.
OFF: for small area like OSD
ON: for large area like TELETEXT
(input level 0.7Vp-p/100IRE)
16
17
18
250Ħ
250Ħ
100uA
250Ħ
2.3V
The GND terminal for Y/C circuit.
Terminals for R/G/B signal output.
Connect resistances to GND, if through rate
is not enough. Because of source current
limitation, the resistances should be 2.0k• or
more.
•
20
100Ħ
21
22
An input terminal to sense AKB cathode
current.
Connect this terminals to GND if not using
the AKB system.
23
VK
1kĦ
limitter
over circuit
14
42
250Ħ
19
14
19
42
VF
soft
start
19
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5 Page 
PIN NAME
48 TV IN
FUNCTION
An input terminal for TV video signal.
(input level 1Vp-p / 140 IRE)
INTERFACE
1kĦ
14
2V
48
1kĦ
49 De-Emphasis
•Mon-OUT
A terminal to De-Emphasis Audio signal, and
pick up detected Audio signal. Connect
capacitor (0.01•F to GND.
The time constant 50/75us is set by the
IICBUS control “SIF Freq”.
Remove the capacitor in case of use US/JPN
sound multiplex system.
49
50 PIF TANK
51
Terminals to connect a PIF tank coil.
The tank coil should be pre-set up within +/-
2% for the automatic tuning. Manual tuning is
also available..
The resonance capacitance of the tank
should be 18pF.
50
51
52 DC NF
A terminal for connect the capacitor for DC
NF.
19
14
15kĦ 7.5kĦ 500Ħ
5
1
5
14
52
2kĦ 10kĦ
5
Ver3.7
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11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TB1254N.PDF ] | |
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