Philips QCS1.0S, Руководство по обслуживанию

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Circuit Descriptions, Abbreviation List, and IC Data Sheets EN 47 QCS1.0S LA 9.
9.9 Sipex SP3243 RS-232 transceiver
The SP3243 transceivers meet the EIA/TIA-232 and ITU-T
V.28/V.24 communication protocols. Generates 5.5V RS-232
voltage levels from a 3.0V to +5.5V power supply and
operates at a data rate of 120 kbps fully loaded. The SP3243
devices feature AUTO ON-LINE® circuitry automatically wakes
up from a 1
μ
A shutdown. It occurs after a RS-232 cable being
disconnected. Under this condition, the internal charge pump
and the drivers will be shut down. Otherwise, the system
automatically comes on-line.
9.10 Mitsumi MM1671 Low Supply Voltage 75
Ω
Driver
This IC is a 75Ù driver with a built-in LPF that can operate at
low voltage. It supports 3 V and 5 V operating power voltage,
and is ideal for video signal output in devices ranging from
portable digital still cameras to stationary equipment such as
DVD players. It incorporates a high performance 4-stage LPF,
which is ideal for removing DAC sampling noise. In addition,
ultra-low current consumption has been achieved by
suppressing current consumption during power save to
under1
μ
A. This lengthens the life of the batteries in portable
devices. The built-in amp gain on this IC is available in series:
6 dB/9 dB/12 dB/16.5 dB, thus enabling support for DAC and a
variety of output amplitudes. There is also a series with input
clamp and one without, allowing support for a range of video
signals, not just composite signals.
9.11 EtronTech EM636165TS-5G SDRAM
The EM636165 SDRAM is a high-speed CMOS synchronous
DRAM containing 16 Mbits. It is internally configured as a dual
512K word
×
16 DRAM with a synchronous interface (all signals
are registered on the positive edge of the clock signal, CLK).
Each of the 512K
×
16 bit banks is organized as 2048 rows by
256 columns by 16 bits. Read and write accesses to the
SDRAM are burst oriented; accesses start at a selected
location and continue for a programmed number of locations in
a programmed sequence. Accesses begin with the registration
of a BankActivate command which is then followed by a Read
or Write command. The EM636165 provides for programmable
Read or Write burst lengths of 1, 2, 4, 8, or full page, with a
burst termination option. An auto precharge function may be
enabled to provide a self-timed row precharge that is initiated
at the end of the burst sequence. The refresh functions, either
Auto or Self Refresh are easy to use. By having a
programmable mode register, the system can choose the most
suitable modes to maximize its performance. These devices
are well suited for applications requiring high memory
bandwidth and particularly well suited to high performance PC
applications.
9.12 National Semiconductor LM1881 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 V 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.
9.13 NXP PCF8563 RTC
The PCF8563 is a CMOS real-time clock/calendar optimized
for low power consumption. A programmable clock output,
interrupt output and voltage-low detector are also provided. All
address and data are transferred serially via a two-line
bidirectional I
2
C-bus. Maximum bus speed is 400 kbits/s. The
built-in word address register is incremented automatically
after each written or read data byte.
9.14 ST TSH340 Video Buffer
The TSH340 is a video buffer featuring a gain of 6 dB. A large
bandwidth of 300 MHz for only 9.4 mA of quiescent current
allows the TSH340 to achieve a gain flatness of 220 MHz. Its
structure features a very high slew rate of 540 V/
μ
s minimum
guaranteed by test. Associated to a very good THD these
characteristics are particularly intended in the high quality
video systems. The TSH340 is available in tiny SOT23-5 and
SO8 plastic packages for size saving consideration.
9.15 Pericom PI5C3253 Dual 1-of-4 FET Multiplexer/
Demultiplexer
Pericom Semiconductor's PI5C3253 is a Dual 4 : 1 Multiplexer/
demultiplexer with three-state outputs that is pinout compatible
with the PI74FCT253T, 74F253, and 74ALS/AS/LS 253. Inputs
can be connected to outputs with low on resistance (5
Ω
) with
no additional ground bounce noise or propagation delay.
9.16 ATMEL AT24C64AN EPROM
The AT24C32A/64A provides 32,768/65,536 bits of serial
electrically erasable and programmable read only memory
(EEPROM) organized as 4096/8192 words of 8 bits each. The
device's cascadable feature allows up to 8 devices to share a
common twowire bus. The device is optimized for use in many
industrial and commercial applications where low power and
low voltage operation are essential. The AT24C32A/64A is
available in space saving 8-lead JEDEC PDIP, 8-lead JEDEC
SOIC, 8-lead EIAJ SOIC, 8-lead Mini-MAP (MLP 2x3) and 8-
lead TSSOP packages and is accessed via a 2-wire serial
interface. In addition, the entire family is available in 2.7 V
(2.7 V to 5.5 V) and 1.8 V (1.8 V to 5.5 V) versions.