Circuit Descriptions
7.
7.
Circuit Descriptions
Index of this chapter:
7.1 ST FLI32626H Single-chip enhanced TV
7.2 Fairchild NC7SB3157 Low-Voltage SPDT Analog Switch
7.3 Microchip 24LC64
7.4 NXP PCA9555 16-bit I2C and SMBus I/O port with interrupt
7.5 Diodes Inc. AP1117 1A Low dropout positive regulator
7.6 NSC LM1881 Video Sync Separator
7.7 Pericom PI5V331 Video Mux/DeMux
7.8 JRC NJW1141 Audio Processor
7.9 ST TL062 Low power J-FET dual op-amp
7.10 YAMAHA YDA148 Audio Amplifier
7.11 Sipex SP3243 RS-232 transceiver
7.12 Intersil ISL29010 Light-to-Digital output sensor
7.1
ST FLI32626H Single-chip enhanced TV
The FLI32626H is an innovative System-on-Chip (SoC)
controller designed for flat panel display TVs, LCD TVs, and
other emerging digital display applications. The FLI32626H
handles video and computer graphics inputs in virtually any
format and resolution. The output port delivers unparalleled
image quality and supports display resolutions of up to 1080p.
It has a rich feature set and high level of integration. Its
sophisticated technologies for colour management, scaling,
video processing, and audio processing make the FLI32626H
the ideal solution for a high-quality, cost-effective, integrated
TV solution. The FLI32626H IC offers a high integration SoC
solution for advanced analog TV dual channel applications
(e.g. PIP) and for TV products that require superior video and
audio quality with extensive feature sets. The FLI32626H
includes a flexible analog and digital front-end with a wide
range of integrated components for different application needs
as well as state-of-the-art dual channel video processing based
on renowned Faroudja technologies. The FLI32626H is the
only device needed for a complete LCD TV solution chassis
supporting worldwide video and audio standards where
exceptional quality is required. For regional variations, only
connector and firmware changes are needed.
7.2
Fairchild NC7SB3157 Low-Voltage SPDT
Analog Switch
The NC7SB3157 / FSA3157 is a high-performance, single-pole
/ double-throw (SPDT) analog switch or 2:1 multiplexer / de-
multiplexer bus switch. The device is fabricated with advanced
sub-micron CMOS technology to achieve high-speed enable
and disable times and low on resistance. The
break-before-make select circuitry prevents disruption of
signals on the B Port due to both switches temporarily being
enabled during select pin switching. The device is specified to
operate over the 1.65 to 5.5V VCC operating range. The
control input tolerates voltages up to 5.5V, independent of the
V
CC
operating range.
7.3
Microchip 24LC64
The Microchip Technology Inc. 24AA64/24LC64 (24XX64*) is
a 64 Kbit Electrically Erasable PROM. The device is organized
as eight blocks of 1K x 8-bit memory with a 2-wire serial
interface. Low voltage design permits operation down to 1.8V
with standby and active currents of only 1
μ
A and 1 mA
respectively. It has been developed for advanced, low power
applications such as personal communications or data
acquisition. The 24XX64 also has a page-write capability for up
to 32 bytes of data. Functional address lines allow up to eight
devices on the same bus, for up to 512 Kbits address space.
7.4
NXP PCA9555 16-bit I
2
C and SMBus I/O port
with interrupt
The PCA9555 consist of two 8-bit Configuration (Input or
Output selection); Input, Output and Polarity inversion (Active
high or Active low operation) registers. The system master can
enable the I/Os as either inputs or outputs by writing to the I/O
configuration bits. The data for each Input or Output is kept in
the corresponding Input or Output register. The polarity of the
read register can be inverted with the Polarity Inversion
Register. All registers can be read by the system master. The
PCA9555 open-drain interrupt output is activated when any
input state differs from its corresponding input port register
state and is used to indicate to the system master that an input
state has changed. The power-on reset sets the registers to
their default values and initializes the device state machine.
Three hardware pins (A0, A1, A2) vary the fixed I
2
C address
and allow up to eight devices to share the same I
2
C/SMBus.
The fixed I
2
C address of the PCA9555 is the same as the
PCA9554 allowing up to eight of these devices in any
combination to share the same I
2
C/SMBus.
7.5
Diodes Inc. AP1117 1A Low dropout positive
regulator
AP1117 is a low dropout positive adjustable or fixed-mode
regulator with 1A output current capability. The product is
voltage specifically designed to provide well-regulated supply
for low IC applications such as high-speed bus termination and
low current 3.3 V logic supply. AP1117 is also well suited for
other applications such as VGA cards. AP1117 is guaranteed
to have lower than 1.4V dropout at full load current making it
ideal to provide well-regulated outputs of 1.25 to 5.0 V with
6.4 to 18 V input supply.
7.6
NSC LM1
88
1 Video Sync Separator
The LM1881 Video sync separator extracts timing information
including composite and vertical sync, burst/back porch timing,
and odd/even field information from standard negative going
sync NTSC, PAL* and SECAM video signals with amplitude
from 0.5 to 2 V
p-p
. The integrated circuit is also capable of
providing sync separation for non-standard, faster horizontal
rate video signals. The vertical output is produced on the rising
edge of the first serration in the vertical sync period. A default
vertical output is produced after a time delay if the rising edge
mentioned above does not occur within the externally set delay
period, such as might be the case for a non-standard video
signal.
7.7
Pericom PI5V331 Video Mux/DeMux
Pericom Semiconductor’s PI5V331 is a true bidirectional Dual
4-channel multiplexer/demultiplexer that is recommended for
both S-Video or composite video switching applications. The
switch can be driven from a current output RAMDAC or voltage
output composite video source. Low On-resistance and wide
bandwidth make it ideal for video and other applications. Also
this device has exceptionally high current capability which is far
greater than most analog switches offered today. A single 5 V
supply is all that is required for operation. The PI5V331 offers
a high-performance, low-cost solution to switch between video
sources.
