ST7GEME4 STMicroelectronics, ST7GEME4 Datasheet - Page 13

• Manufacturer Part Number: ST7GEME4
• Description: 8-bit MCU
• Manufacturer: STMicroelectronics

Specifications of ST7GEME4

• Transmission Rate: 9.6 Kbps to 115 Kbps
• Format: 8-bit, no parity
• Selectable Card Vcc: 1.8 V, 3 V, and 5 V

ST7GEME4
4
4.1
Electrical characteristics
Absolute maximum ratings
The ST7GEME4 contains circuitry to protect the inputs against damage due to high static
voltages. However it is advisable to take normal precautions to avoid applying any voltage
higher than the specified maximum rated voltages.
For proper operation it is recommended that V
V
level (V
Power considerations
The average chip-junction temperature, T
equation:
where:
T
RthJA = Package thermal resistance (junction-to ambient)
P
P
P
Stresses above those listed as “absolute maximum ratings” may cause permanent damage
to the device. This is a stress rating only and functional operation of the device at these
conditions is not implied. Exposure to maximum rating for extended periods may affect
device reliability.
Table 4.
A
DD
D
INT
PORT
= Ambient temperature
= P
. Reliability is enhanced if unused inputs are connected to an appropriate logic voltage
= I
V
ESDCard
Symbol
DD
Warning:
INT
I
= Port power dissipation determined by the user
I
V
DD
ESD
DD
VDD_i
VSS_i
V
OUT
- V
IN
+ P
or V
x V
SS
Absolute maximum ratings
PORT
DD
SS
).
(chip internal power)
Direct connection to V
the device in case of program counter corruption (due to
unwanted change of the I/O configuration). To guarantee safe
conditions, this connection has to be done through a typical
10kΩ pull-up or pull-down resistor.
Supply voltage
Input voltage
Output voltage
ESD susceptibility
ESD susceptibility for card pads
Total current into V
Total current out of V
Ratings
T J
DD_i
=
SS_i
T A
(source)
J
, in Celsius can be obtained by the following
(sink)
DD
+
PD RthJA
I
or V
and V
×
SS
O
of the I/O pins could damage
be higher than V
V
V
SS
SS
- 0.3 to V
- 0.3 to V
Electrical characteristics
Value
2000
4000
250
250
6.0
SS
DD
DD
+ 0.3
+ 0.3
and lower than
Unit
mA
V
V
V
V
V
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