CONEX BT865A, BT864A Datasheet

digital infotainment products

Distinguishing Features

• 8- or 16-bit 4:2:2 YCrCb inputs

• NTSC-M/PAL/PAL-M/PAL-N/PAL-Nc
video outputs

• S-video/RGB (SCART)/CVBS outputs

• CCIR 601 or square pixel operation

• 2x oversampling

• 10-bit DACs

• Current output DACs for the highest
video quality and reduced cost

High Performance YCrCb to
NTSC/PAL Digital Video Encoders

Conexant’s Bt864A and Bt865A are designed for video systems
that require the generation of high-quality composite, Y/C
(S-video) or RGB (SCART) video signals from an 8- or 16-bit YCrCb
video stream. Worldwide video standards are supported, including
NTSC-M (N. America, Taiwan, Japan), PAL-B,D,G,H,I (Europe, Asia),
PAL-M (Brazil), PAL-N (Uruguay, Paraguay), and PAL-Nc (Argentina).

The Bt864A and Bt865A are pin-compatible and functionally
identical, except the Bt865A can also output the Macrovision™
version 7 anticopy algorithm. Either master or slave mode
operation may be implemented to provide the highest video
performance when interfaced with any MPEG decoder. CCIR 601
or square pixel video signals may be input to provide maximum
flexibility in the system architecture.

The Bt864A/865A and other Conexant video encoders have been
designed into numerous high-performance and high-volume
consumer applications worldwide. These include satellite set-top
boxes, DVD players, PC add-in kits, digital cameras, video CD
players, video conferencing systems and other applications
that demand the highest quality video.

Digital Video Encoder

Bt864A/865A

digital infotainment products

Flexible Operation for
a Wide Range of Video Systems

High-performance video combined with the right set
of features make the Bt864A/865A a versatile device
for almost any video system. 10-bit DACs provide the
high-resolution video required for modern satellite
set-top boxes, DVD players, PC add-in cards, video
conferencing systems and digital cameras. Several
power conservation modes extend portable system
battery life and help to reduce system heating.
New televisions and media, which make use of
wide screen 16:9 aspect ratios, are also supported
by the Bt864A/865A to provide the best flexibility,
performance and functionality.

The Bt864A/865A accepts video data in a variety
of ways: CCIR 601, NTSC, and PAL square pixel
formats. This provides system designers with
maximum flexibility. Either 3.3V or 5V operation
is possible with the Bt864A/865A to permit operation
within any system environment. Horizontal sync
and vertical sync may be configured as inputs
(slave mode) or outputs (master mode). In addition
to the normal blanking which occurs during Hsync
and Vsync, blanking may be externally controlled
during active video. The rise and fall times of sync,
the burst envelope, and closed caption data are
internally controlled.

Functional block diagram

Digital Video Encoder

Bt864A/865A