ST72C254G2M6 STMicroelectronics, ST72C254G2M6 Datasheet - Page 114

• Manufacturer Part Number: ST72C254G2M6
• Description: IC MCU 8BIT 8K FLASH SOIC-28
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST72C254G2M6

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 3.2 V ~ 5.5 V
• Data Converters: A/D 6x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC (7.5mm Width)
• Controller Family/series: ST7
• No. Of I/o's: 22
• Ram Memory Size: 256Byte
• Cpu Speed: 8MHz
• No. Of Timers: 2
• Rohs Compliant: Yes
• Processor Series: ST72C2x
• Core: ST7
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: I2C, SPI
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 22
• Number Of Timers: 3 bit
• Operating Supply Voltage: 3.2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: ST7MDT1-DVP2/US
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: In Transition

ST72104G, ST72215G, ST72216G, ST72254G
EMC CHARACTERISTICS (Cont’d)
14.7.2 Absolute Electrical Sensitivity
Based on three different tests (ESD, LU and DLU)
using specific measurement methods, the product
is stressed in order to determine its performance in
terms of electrical sensitivity. For more details, re-
fer to the AN1181 ST7 application note.
14.7.2.1 Electro-Static Discharge (ESD)
Electro-Static Discharges (3 positive then 3 nega-
tive pulses separated by 1 second) are applied to
the pins of each sample according to each pin
combination. The sample size depends of the
number of supply pins of the device (3 parts*(n+1)
supply pin). Two models are usually simulated:
Human Body Model and Machine Model. This test
conforms to the JESD22-A114A/A115A standard.
See
Human Body Model Test Sequence
– C
– S1 switches position from generator to R.
– A discharge from C
– S2 must be closed 10 to 100ms after the pulse
Absolute Maximum Ratings
Figure 71. Typical Equivalent ESD Circuits
Notes:
1. Data based on characterization results, not tested in production.
114/140
ator.
to the ST7 occurs.
delivery period to ensure the ST7 is not left in
charge state. S2 must be opened at least 10ms
prior to the delivery of the next pulse.
HIGH VOLTAGE
V
V
GENERATOR
Symbol
ESD(HBM)
L
ESD(MM)
Figure 71
is loaded through S1 by the HV pulse gener-
PULSE
Electro-static discharge voltage
(Human Body Model)
Electro-static discharge voltage
(Machine Model)
and the following test sequences.
S1
L
through R (body resistance)
C
L
100pF
HUMAN BODY MODEL
Ratings
R=1500
ST7
T
T
A
A
S2
+25°C
+25°C
Machine Model Test Sequence
– C
– S1 switches position from generator to ST7.
– A discharge from C
– S2 must be closed 10 to 100ms after the pulse
– R (machine resistance), in series with S2, en-
ator.
delivery period to ensure the ST7 is not left in
charge state. S2 must be opened at least 10ms
prior to the delivery of the next pulse.
sures a slow discharge of the ST7.
HIGH VOLTAGE
GENERATOR
L
is loaded through S1 by the HV pulse gener-
Conditions
PULSE
S1
L
to the ST7 occurs.
C
L
200pF
Maximum value
MACHINE MODEL
ST7
2000
200
1)
Unit
V
S2