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ST3243B 数据表(PDF) 6 Page - STMicroelectronics

部件名 ST3243B
功能描述  3 to 5.5 V, 400 Kbps, RS-232 transceiver with auto-power-down
PDF  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) 6 Page - STMicroelectronics

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Electrical characteristics
ST3243B - ST3243C
6/22
3
Electrical characteristics
Table 5.
Electrical characteristics
(C1 - C4 = 0.1 µF, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified. Typical
values are referred to TA = 25 °C
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
IASHDN Supply current auto-power-down
VCC = 3.3 or 5.0V, TA = 25°C
All R_IN open, FORCEOFF = VCC
110
µA
ISHDN
Shutdown supply current
VCC = 3.3 or 5.0V, TA = 25°C
All R_IN open, FORCEOFF = GND
110
µA
ISHDN
Supply current auto-power-down
disabled
VCC = 3.3 or 5.0V TA = 25°C
FORCEON = FORCEOFF = VCC
No Load
0.3
1
mA
Table 6.
Logic input electrical characteristics
(C1 - C4 = 0.1 µA, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified. Typical
values are referred to TA = 25 °C
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
VTIL
Input logic threshold low
T-IN, FORCEON, FORCEOFF
0.8
V
VTIH
Input logic threshold high
T-IN, FORCEON, FORCEOFF
VCC = 3.3V
VCC = 5V
2
2.4
V
V
VTHYS
Transmitter input hysteresis
0.5
V
IIL
Input leakage current
T-IN, FORCEON, FORCEOFF
± 0.01
± 1.0
µA
IOL
Output leakage current
Receiver Disabled
± 0.05
± 10
µA
VOL
Output voltage low
IOUT = 1.6mA
0.4
V
VOH
Output voltage high
IOUT = -1mA
VCC-0.6 VCC-0.1
V
Table 7.
Auto-power-down electrical characteristics
(C1 - C4 = 0.1 µF, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified. Typical
values are referred to TA = 25 °C
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
VRITE
Receiver input threshold to
transmitter enabled
Positive threshold
Negative threshold
2.7
2.7
V
V
VRITD
Receiver input threshold to
transmitter disabled
1 µA Supply Current
-0.3
0.3
V
VIOL
INVALID Output voltage LOW
0.4
V
VIOH
INVALID Output voltage HIGH
VCC-0.6
V
tWU
Receiver threshold to
transmitter enabled
IOUT = 1.6mA
250
ms



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