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ST72344S2 Datasheet(PDF) 222 Page - STMicroelectronics

Part # ST72344S2
Description  SCI asynchronous serial interface
PDF  247 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72344S2 Datasheet(HTML) 222 Page - STMicroelectronics

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Electrical characteristics
ST72344xx, ST2345xx
222/247
Doc ID 12321 Rev 6
Figure 114. Typical VDD – VOH vs. VDD (high sink)
13.10
Control pin characteristics
13.10.1
Asynchronous RESET pin
TA = -40 °C to 85 °C, unless otherwise specified.
0
40
80
120
160
200
2.533.5
4
5
Ilo (mA)
-45°C
25°C
90°C
130°C
0
100
200
300
400
500
2.533.5
4
5
Ilo (mA)
-45°C
25°C
90°C
130°C
Table 109.
Asynchronous RESET pin characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VIL
Input low level voltage
Vss - 0.3
0.3VDD
V
VIH
Input high level voltage
0.7VDD
VDD + 0.3
Vhys
Schmitt trigger voltage
hysteresis (1)
1.
Data based on characterization results, not tested in production.
2V
VOL
Output low level voltage (2)
2.
The IIO current sunk must always respect the absolute maximum rating specified in Table 85: Current
characteristics and the sum of IIO (I/O ports and control pins) must not exceed IVSS.
VDD = 5 V
IIO = +5 mA
0.5
1.0
V
IIO = +2 mA
0.2
0.4
RON
Pull-up equivalent resistor
(3)(1)
3.
The RON pull-up equivalent resistor is based on a resistive transistor. Specified for voltages on RESET pin
between VILmax and VDD
VDD = 5 V
20
40
80
k
Ω
VDD = 3 V
40
70
120
tw(RSTL)out
Generated reset pulse
duration
Internal reset sources
14 (1)
32
µs
th(RSTL)in
External reset pulse hold
time (4)
4.
To guarantee the reset of the device, a minimum pulse has to be applied to the RESET pin. All short pulses
applied on RESET pin with a duration below th(RSTL)in can be ignored.
12 (1)
µs
tg(RSTL)in
Filtered glitch duration
200
ns



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