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參數(shù)資料
| 型號： | TSA5523M |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Fan Finger Guard |
| 中文描述： | 1.4千兆赫的I2C總線控制的多媒體合成器 |
| 文件頁數(shù)： | 2/20頁 |
| 文件大?。?/td> | 182K |
| 代理商： | TSA5523M |
1996 Dec 17
2
Philips Semiconductors
Product specification
1.4 GHz I
2
C-bus controlled multimedia
synthesizer
TSA5523M
FEATURES
Complete 1.4 GHz single-chip system
Adaptive DC/DC converter driver output
On-board tuning amplifier output
Varicap drive disable
Four NPN open-collector output ports (10 mA)
Four bus-controlled bidirectional ports
(NPN open-collector outputs)
In-lock detector
5-step Analog-to-Digital Converter (ADC)
Mixer/Oscillator (M/O) band-switch output
15-bit programmable divider
Programmable reference divider ratio
(512, 640 or 1024)
Programmable charge-pump current (50 or 250
μ
A)
I
2
C-bus format
– Address plus four data bytes transmission
(write mode)
– Address plus one status byte transmission
(read mode)
– Four independent addresses
Low power, low radiation.
GENERAL DESCRIPTION
The device is a single chip PLL frequency synthesizer
designed for TV and VCR tuning systems. The circuit
consists of a divide-by-eight prescaler with its own
preamplifier, a 15-bit programmable divider, a crystal
oscillator and its programmable reference divider, a
phase/frequency detector combined with a charge-pump
which drives the tuning amplifier, including 33 V output.
Three NPN open-collector outputs are provided for band
switching together with five open-collector NPN outputs.
Four of these ports can also be used as input ports
(one ADC and three general purpose I/O ports).
An output is provided to control a Philips mixer/oscillator IC
controlled by bits P7, P5 and P4. Depending on the
reference divider ratio (512, 640 or 1024), the phase
comparator operates at 3.90625, 6.25 or 7.8125 kHz with
a 4 MHz crystal.
The lock detector bit FL is set to logic 1 when the loop is
locked and is read on the SDA line (status byte) during a
read operation. The ADC is available for digital AFC
control. The ADC code is read during a read operation on
the I
2
C-bus. The ADC input is combined with the port P6.
In the test mode, this port is also used as a test output for
f
ref
and f
div/2
(see Table 4). In addition, the circuit includes
a DC/DC converter driver connected to the IDC pin to
control the amplitude of an external oscillator followed by
a voltage rectifier.
The voltage rectifier is used to generate the correct tuning
supply voltage to maintain a constant current into the
tuning amplifier. The DC/DC converter driver can be
disabled by setting the IDC pin to V
CC1
in this event the
tuning supply voltage is delivered by a fixed 33 V supply.
Five serial bytes (including address byte) are required to
address the device, select the VCO frequency, program
the ports, set the charge-pump current and set the
reference divider ratio. The device has four independent
I
2
C-bus addresses which can be selected by applying a
specific voltage on the AS input (see Table 3).
APPLICATIONS
Multimedia TV tuners and front-ends
VCR tuners.
ORDERING INFORMATION
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TSA5523M/C1
SSOP20
plastic shrink small outline package; 20 leads; body width 4.4 mm
SOT266-1
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TSA5523M/C1 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:1.4 GHz I2C-bus controlled multimedia synthesizer |
| TSA5526 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:1.3 GHz universal bus-controlled TV synthesizers |
| TSA5526AM | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:1.3 GHz universal bus-controlled TV synthesizers |
| TSA5526AT | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:1.3 GHz universal bus-controlled TV synthesizers |
| TSA5526ATD-T | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:I2C-Bus Frequency Synthesizer |
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