ST72C334J2B6 STMicroelectronics, ST72C334J2B6 Datasheet - Page 127

• Manufacturer Part Number: ST72C334J2B6
• Description: 8-bit Microcontrollers - MCU Flash 8K SPI/SCI
• Manufacturer: STMicroelectronics

Specifications of ST72C334J2B6

• Product Category: 8-bit Microcontrollers - MCU
• Core: ST7
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 8 MHz
• Program Memory Size: 8 KB
• Data Ram Size: 384 B
• On-chip Adc: Yes
• Operating Supply Voltage: 3.2 V to 5.5 V
• Package / Case: SDIP-42
• Mounting Style: Through Hole
• A/d Bit Size: 8 bit
• A/d Channels Available: 8
• Data Rom Size: 256 B
• Interface Type: SCI, SPI
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 32
• Number Of Timers: 4 bit
• Program Memory Type: Flash
• Factory Pack Quantity: 13
• Supply Voltage - Max: 5 V
• Supply Voltage - Min: 3.2 V

EMC CHARACTERISTICS (Cont’d)
True Open Drain Pin Protection
The centralized protection (4) is not involved in the
discharge of the ESD stresses applied to true
open drain pads due to the fact that a P-Buffer and
diode to V
local protection between the pad and V
5b) is implemented to completely absorb the posi-
tive ESD discharge.
Figure 79. Positive Stress on a True Open Drain Pad vs. V
Figure 80. Negative Stress on a True Open Drain Pad vs. V
Figure 81. Multisupply Configuration
Main path
Path to avoid
Main path
V
V
DD
DD
SS
are not implemented. An additional
V
V
V
V
SS
SS
DD
DD
V
V
DDA
SSA
(5a)
(3b)
(3b)
(3b)
SS
(5a &
OUT
OUT
BACK TO BACK DIODE
Multisupply Configuration
When several types of ground (V
power supply (V
BETWEEN GROUNDS
reason (better noise immunity...), the structure
shown in
device against ESD.
(4)
(4)
ST72334J/N, ST72314J/N, ST72124J
SS
DD
Figure 81
IN
IN
DD
(2b)
, V
is implemented to protect the
DDA
(2b)
(1)
(1)
, ...) are available for any
SS
V
V
(3b)
(5b)
, V
DDA
SSA
SSA
, ...) and
127/153
V
V
V
V
SS
SS
DD
DD