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.

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)

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

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)

AV SWITCH
• Visual TV / EXT inputs
• Audio TV / EXT inputs