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ST75C520 датащи(PDF) 5 Page - STMicroelectronics

номер детали ST75C520
подробное описание детали  HIGH SPEED FAX MODEM DATA PUMP
PDF  45 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST75C520 датащи(HTML) 5 Page - STMicroelectronics

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I.7 - Power Supply
Symbol
Parameter
VDD
Digital +5V (Pin 9, 25, 41). To be connected to AVDD (see below).
GND
Digital Ground (Pin 8, 24, 40). To be connected to AGNDT and AGNDR (see below).
AVDD
Analog +5V (Pin 62). To be connected to VDD (see below).
AGNDT
Analog Transmit Ground (Pin 64). To be connected to GND (see below).
AGNDR
Analog Receive Ground (Pin 59). To be connected to GND (see below).
AGNDT and AGNDR must be connected together as close as possible to the chip.
GND and AGNDR board plans should be separated, then connected together as close as possible to the
chip, at a single point. Similarly VDD and AVDD must ne connected as close as possible to the chip, at a
single point.
V.21 FLAG
DETECTOR
TONE
DETECTOR
RING
DETECTOR
V.24
INTERFACE
HANDSHAKE AND
STATUS REPORT
V.17, V.29, V.27
FAX RECEIVER
RX
ANALOG
TX
ANALOG
V.17, V.29, V.27
FAX TRANSMITTER
HDLC
RX
DUAL RAM
INTERFACE
HDLC
TX
MUX
DPLL
38
13
11
12
10
15
16
14
1
2
60
61
TXA1
TXA2
RXA1
RXA2
SD [0..7]
(26 to 33)
SINTR
ST75C520
II - BLOCK DIAGRAMS
II.1 - Functional Block Diagram
ST75C520
5/45



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