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ST24LC21B датащи(PDF) 17 Page - STMicroelectronics

номер детали ST24LC21B
подробное описание детали  1 Kbit x8 Dual Mode Serial EEPROM for VESA PLUG & PLAY
PDF  22 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST24LC21B датащи(HTML) 17 Page - STMicroelectronics

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AI01749
VSync
100nF
47k
Ω
+5V
SCL
SDA
+5V Monitor
VCLK
SCL
SDA
VSS
VCC
MONITOR
HOST
VGA Cable
14
15
12
9
Figure 13. Recommended Schematic for VESA 2.0 Specification
low during this time, the ST24xy21 terminate the
data transfer and switches to a standby state.
NOTE CONCERNING THE POWER SUPPLY
VOLTAGE IN THE VESA 2.0 SPECIFICATION
According to the VESA 2.0 specification, the
ST24xy21 can be supplied by either the MONITOR
or by the HOST (using +5V on the VGA cable pin
9) power supply. The easyest way to implement this
is to use 2 diodes as described in the following
schematic. The ST24xy21 supply voltage will be
decreased by 0.6V, which is the diode forward
voltage drop, and will be below 4.5V. Nevertheless,
the ST24xy21 remains operational and no input will
be damaged if the applied voltage on any input
complies with the Absolute Maximum Ratings val-
ues.
Under this condition, the threshold voltage of the
Schmitt-Trigger (pin 7) will be decreased (as in
Table 6).
17/22
ST24LC21B, ST24LW21, ST24FC21, ST24FC21B, ST24FW21



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