EPM1270GT144I5N Altera, EPM1270GT144I5N Datasheet - Page 55

• Manufacturer Part Number: EPM1270GT144I5N
• Description: MAX II
• Manufacturer: Altera

Specifications of EPM1270GT144I5N

• Family Name: MAX II
• Memory Type: Flash
• # Macrocells: 980
• Frequency (max): 1.8797GHz
• Propagation Delay Time: 10ns
• Number Of Logic Blocks/elements: 127
• # I/os (max): 116
• Operating Supply Voltage (typ): 1.8V
• In System Programmable: Yes
• Operating Supply Voltage (min): 1.71V
• Operating Supply Voltage (max): 1.89V
• Operating Temp Range: -40C to 100C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 144
• Package Type: TQFP
• Lead Free Status / Rohs Status: Compliant

Chapter 4: Hot Socketing and Power-On Reset in MAX II Devices
Power-On Reset Circuitry
Figure 4–4. ESD Protection During Negative Voltage Zap
Power-On Reset Circuitry
© October 2008 Altera Corporation
When the I/O pin receives a negative ESD zap at the pin that is less than –0.7 V (0.7 V
is the voltage drop across a diode), the intrinsic
P-Substrate/N+ drain diode is forward biased. Therefore, the discharge ESD current
path is from GND to the I/O pin, as shown in
MAX II devices have POR circuits to monitor V
power-up. The POR circuit monitors these voltages, triggering download from the
non-volatile configuration flash memory (CFM) block to the SRAM logic, maintaining
tri-state of the I/O pins (with weak pull-up resistors enabled) before and during this
process. When the MAX II device enters user mode, the POR circuit releases the I/O
pins to user functionality. The POR circuit of the MAX II (except MAX IIZ) device
continues to monitor the V
POR circuit of the MAX IIZ device does not monitor the V
device enters into user mode. More details are provided in the following sub-sections.
I/O
GND
Source
Drain
Drain
Source
CCINT
PMOS
NMOS
voltage level to detect a brown-out condition. The
Gate
Gate
P-Substrate
Figure
CCINT
N+
N+
and V
D
S
4–4.
GND
I/O
G
CCIO
CCINT
voltage levels during
voltage level after the
MAX II Device Handbook
4–5