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ST3243B 数据表(PDF) 4 Page - STMicroelectronics

部件名 ST3243B
功能描述  3 to 5.5 V, 400 Kbps, RS-232 transceiver with auto-power-down
Download  22 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST3243B 数据表(HTML) 4 Page - STMicroelectronics

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Pin configuration
ST3243B - ST3243C
4/22
17
R3OUT
Third receiver output voltage
18
R2OUT
Second receiver output voltage
19
R1OUT
First receiver output voltage
20
R2OUTB
Non-inverting complementary receiver output, always active for wake-up
21
INVALID
Output of the valid signal detector. Indicates if a valid RS-232 level is present
on receiver inputs logic "1"
22
FORCEOFF
Drive low to shut down transmitters and on-board power supply. This over-
rides all automatic circuitry and FORCEON
23
FORCEON
Drive high to override automatic circuitry keeping transmitters on
(FORCEOFF must be high)
24
C1-
Negative terminal of voltage-charge pump capacitor
25
GND
Ground
26
VCC
Supply voltage
27
V+
5.5V Generated by the charge pump
28
C1+
Positive terminal of voltage-charge pump capacitor
Table 2.
Pin description (continued)
Pin n°
Symbol
Name and function
Table 3.
Truth table
FORCE OFF
TOUT
ROUT
R2OUTB
0
HIGH Z
HIGH Z
ACTIVE (1)
1
ACTIVE (1)
ACTIVE (1)
ACTIVE (1)
1.
If the part is in auto-power-down mode (FORCE OFF = VCC, FORCE ON = GND) it is shutdown, if no valid RS-232 levels
are present on all receiver input


类似零件编号 - ST3243B_07

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类似说明 - ST3243B_07

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