參數(shù)資料
型號: A3PE1500-PQG208
元件分類: FPGA
英文描述: FPGA, 38400 CLBS, 1500000 GATES, PQFP208
封裝: 28 X 28 MM, 3.40 MM HEIGHT, 0.50 MM PITCH, GREEN, PLASTIC, QFP-208
文件頁數(shù): 82/152頁
文件大?。?/td> 4932K
代理商: A3PE1500-PQG208
ProASIC3E DC and Switching Characteristics
v1.2
2 - 23
Single-Ended I/O Characteristics
3.3 V LVTTL / 3.3 V LVCMOS
Low-Voltage Transistor–Transistor Logic is a general-purpose standard (EIA/JESD) for 3.3 V
applications. It uses an LVTTL input buffer and push-pull output buffer. The 3.3 V LVCMOS standard
is supported as part of the 3.3 V LVTTL support.
Table 2-23 Schmitt Trigger Input Hysteresis
Hysteresis Voltage Value (typ.) for Schmitt Mode Input Buffers
Input Buffer Configuration
Hysteresis Value (typ.)
3.3 V LVTTL/LVCMOS/PCI/PCI-X (Schmitt trigger mode)
240 mV
2.5 V LVCMOS (Schmitt trigger mode)
140 mV
1.8 V LVCMOS (Schmitt trigger mode)
80 mV
1.5 V LVCMOS (Schmitt trigger mode)
60 mV
Table 2-24 I/O Input Rise Time, Fall Time, and Related I/O Reliability*
Input Buffer
Input Rise/Fall Time (min.)
Input Rise/Fall Time (max.)
Reliability
LVTTL/LVCMOS (Schmitt trigger
disabled)
No requirement
10 ns *
20 years (110°C)
LVTTL/LVCMOS (Schmitt trigger
enabled)
No requirement
No requirement, but input noise
voltage
cannot
exceed
Schmitt
hysteresis.
20 years (110°C)
HSTL/SSTL/GTL
No requirement
10 ns *
10 years (100°C)
LVDS/B-LVDS/M-LVDS/
LVPECL
No requirement
10 ns *
10 years (100°C)
* For clock signals and similar edge-generating signals, refer to ProASIC3/E SSO and Pin Placement Guidelines.
The maximum input rise/fall time is related to the noise induced into the input buffer trace. If the noise is low,
then the rise time and fall time of input buffers can be increased beyond the maximum value. The longer the
rise/fall times, the more susceptible the input signal is to the board noise. Actel recommends signal integrity
evaluation/characterization of the system to ensure that there is no excessive noise coupling into input signals.
Table 2-25 Minimum and Maximum DC Input and Output Levels
3.3 V LVTTL /
3.3 V LVCMOS
VIL
VIH
VOL
VOH
IOL IOH
IOSL
IOSH
IIL
IIH
Drive Strength
Min., V Max., V Min., V Max., V Max., V Min., V mA mA Max., mA1 Max., mA1 A2 A2
4 mA
–0.3
0.8
2
3.6
0.4
2.4
4
27
25
10
8 mA
–0.3
0.8
2
3.6
0.4
2.4
8
54
51
10
12 mA
–0.3
0.8
2
3.6
0.4
2.4
12
109
103
10
16 mA
–0.3
0.8
2
3.6
0.4
2.4
16
127
132
10
24 mA
–0.3
0.8
2
3.6
0.4
2.4
24
181
268
10
Notes:
1. Currents are measured at high temperature (100°C junction temperature) and maximum voltage.
2. Currents are measured at 85°C junction temperature.
3. Software default selection highlighted in gray.
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