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| 型号： | EP20K400BC652-3 |
| 元件分类： | 电源监测 |
| 英文描述： | Dual Voltage Monitor with Intergrated CPU Supervisor |
| 中文描述： | 双电压监视器集成CPU监控 |
| 文件页数： | 56/114页 |
| 文件大小： | 1623K |
| 代理商： | EP20K400BC652-3 |
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46
Altera Corporation
APEX 20K Programmable Logic Device Family Data Sheet
MultiVolt I/O
Interface
The APEX device architecture supports the MultiVolt I/O interface
feature, which allows APEX devices in all packages to interface with
systems of different supply voltages. The devices have one set of VCC pins
for internal operation and input buffers (VCCINT), and another set for I/O
output drivers (VCCIO).
The APEX 20K VCCINT pins must always be connected to a 2.5 V power
supply. With a 2.5-V VCCINT level, input pins are 2.5-V and 3.3-V tolerant.
Certain devices, identified by a “V” suffix following the speed grade in the
ordering code (e.g., EP20K400BC652-1V), are 5.0-V tolerant. The VCCIO
pins can be connected to either a 2.5-V or 3.3-V power supply, depending
on the output requirements. When VCCIO pins are connected to a 2.5-V
power supply, the output levels are compatible with 2.5-V systems. When
the VCCIO pins are connected to a 3.3-V power supply, the output high is
3.3 V and is compatible with 3.3-V or 5.0-V systems.
Table 12 summarizes 5.0-V tolerant APEX 20K MultiVolt I/O support.
Notes:
(1)
The PCI clamping diode must be disabled to drive an input with voltages higher
than VCCIO.
(2)
APEX 20K devices with a “V” suffix are 5.0-V tolerant.
(3)
When VCCIO = 3.3 V, an APEX 20K device can drive a 2.5-V device with 3.3-V
tolerant inputs.
Open-drain output pins on 5.0-V tolerant APEX 20K devices (with a pull-
up resistor to the 5.0-V supply) can drive 5.0-V CMOS input pins that
require a VIH of 3.5 V. When the pin is inactive, the trace will be pulled up
to 5.0 V by the resistor. The open-drain pin will only drive low or tri-state;
it will never drive high. The rise time is dependent on the value of the pull-
up resistor and load impedance. The IOL current specification should be
considered when selecting a pull-up resistor.
Table 12. 5.0-V Tolerant APEX 20K MultiVolt I/O Support
VCCIO (V)
Input Signals (V)
Output Signals (V)
2.5
3.3
5.0
2.5
3.3
5.0
2.5
vv(1)
v
3.3
vv
v(3)
vv
相关PDF资料 |
PDF描述 |
|---|---|
| EP20K400BC652-3ES | Dual Voltage Monitor with Intergrated CPU Supervisor |
| EP20K400BI652-1 | Dual Voltage Monitor with Intergrated CPU Supervisor |
| EP20K400BI652-1ES | Dual Voltage Monitor with Intergrated CPU Supervisor |
| EP20K400BI652-2ES | Dual Voltage Monitor with Intergrated CPU Supervisor |
| EP20K400BI652-3 | Dual Voltage Monitor with Intergrated CPU Supervisor |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EP20K400BC652-3ES | 制造商:未知厂家 制造商全称:未知厂家 功能描述:FPGA |
| EP20K400BI652-1 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Field Programmable Gate Array (FPGA) |
| EP20K400BI652-1ES | 制造商:未知厂家 制造商全称:未知厂家 功能描述:FPGA |
| EP20K400BI652-2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| EP20K400BI652-2ES | 制造商:未知厂家 制造商全称:未知厂家 功能描述:FPGA |
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