参数资料
| 型号： | ATF2500C-20PI |
| 厂商： | Atmel |
| 文件页数： | 22/24页 |
| 文件大小： | 0K |
| 描述： | IC CPLD EE 20NS 40DIP |
| 标准包装： | 10 |
| 系列： | ATF2500C(L) |
| 可编程类型： | 系统内可编程 |
| 最大延迟时间 tpd(1)： | 20.0ns |
| 电压电源 - 内部： | 4.5 V ~ 5.5 V |
| 宏单元数： | 24 |
| 输入/输出数： | 24 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 40-DIP（0.600"，15.24mm） |
| 供应商设备封装： | 40-PDIP |
| 包装： | 管件 |
7
0777K–PLD–1/24/08
ATF2500C
7.
Security Fuse Usage
A single fuse is provided to prevent unauthorized copying of ATF2500C fuse patterns. Once pro-
grammed, the outputs will read programmed during verify.
The security fuse should be programmed last, as its effect is immediate.
The security fuse also inhibits Preload and Q2 observability.
8.
Bus-friendly Pin-keeper Input and I/O
All ATF2500C family members have programmable internal input and I/O pin-keeper circuits.
The default condition, including when using the AT2500C/CQ family to replace the AT2500B/BQ
or AT2500H, is that the pin-keepers are not activated.
When pin-keepers are active, inputs or I/Os not being driven externally will maintain their last
driven state. This ensures that all logic array inputs and device outputs are known states. Pin-
keepers are relatively weak active circuits that can be easily overridden by TTL-compatible driv-
ers (see input and I/O diagrams below).
Enabling or disabling of the pin-keeper circuits is controlled by the device type chosen in the
logic compiler device selection menu. Please refer to the Software Compiler Mode Selection
table for more details. Once the pin-keeper circuits are disabled, normal termination procedures
required for unused inputs and I/Os.
Figure 8-1.
Input Diagram
PROGRAMMABLE
OPTION
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ATF2500C-20PU | 功能描述:CPLD - 复杂可编程逻辑器件 20 ns 24 I/O Pins 24 macorcells 48 reg RoHS:否 制造商:Lattice 系列: 存储类型:EEPROM 大电池数量:128 最大工作频率:333 MHz 延迟时间:2.7 ns 可编程输入/输出端数量:64 工作电源电压:3.3 V 最大工作温度:+ 90 C 最小工作温度:0 C 封装 / 箱体:TQFP-100 |
| ATF2500CL-20JC | 功能描述:IC CPLD 24 MACRO 20NS 40PLCC 制造商:microchip technology 系列:ATF2500C（L） 包装:管件 零件状态:停產 可编程类型:系统内可编程 延迟时间 tpd（1）最大值:20.0ns 电源电压 - 内部:4.75 V ~ 5.25 V 宏单元数:24 I/O 数:24 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:44-LCC（J 形引线） 供应商器件封装:44-PLCC（16.58x16.58） 基本零件编号:ATF2500 标准包装:27 |
| ATF25100 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:TRANSISTOR | JFET | N-CHANNEL | 50MA I(DSS) | CHIP |
| ATF25170 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:TRANSISTOR | JFET | N-CHANNEL | 50MA I(DSS) | MICRO-XVAR |
| ATF-25170 | 制造商:AGILENT 制造商全称:AGILENT 功能描述:0.5-10 GHz Low Noise Gallium Arsenide FET |
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