- 制造厂商：TI
- 产品类别：逻辑和电压转换
- 技术类目：专用逻辑 IC - FIFO 内存 IC
- 功能描述：512 x 18 同步 FIFO 存储器
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The SN74ACT7803 is a 512-word × 18-bit FIFO suited for buffering asynchronous datapaths up to
67-MHz clock rates and 12-ns access times. Two devices can be configured for bidirectional data buffering without additional logic. Multiple distributed VCC and GND pins, along with Texas Instruments patented output edge control (OECTM) circuit, dampen simultaneous switching noise.
The write clock (WRTCLK) and read clock (RDCLK) are free running and can be asynchronous or coincident. Data is written to memory on the rising edge of WRTCLK when WRTEN1 is high, WRTEN2\ is low, and input ready (IR) is high. Data is read from memory on the rising edge of RDCLK when RDEN\, OE1\, and OE2\ are low and output ready (OR) is high. The first word written to memory is clocked through to the output buffer, regardless of the RDEN\, OE1\, and OE2\ levels. The OR flag indicates that valid data is present on the output buffer.
The FIFO can be reset asynchronously to WRTCLK and RDCLK. RESET\ must be asserted while at least four WRTCLK and four RDCLK rising edges occur to clear the synchronizing registers. Resetting the FIFO initializes the IR, OR, and half-full (HF) flags low and the almost-full/almost-empty (AF/AE) flag high. The FIFO must be reset upon power up.
The SN74ACT7803 is characterized for operation from 0°C to 70°C.
- Member of the Texas Instruments WidebusTM Family
- Free-Running Read and Write Clocks Can Be Asynchronous or Coincident
- Read and Write Operations Synchronized to Independent System Clocks
- Input-Ready Flag Synchronized to Write Clock
- Output-Ready Flag Synchronized to Read Clock
- 512 Words by 18 Bits
- Low-Power Advanced CMOS Technology
- Half-Full Flag and Programmable Almost-Full/Almost-Empty Flag
- Bidirectional Configuration and Width Expansion Without Additional Logic
- Fast Access Times of 12 ns With a 50-pF Load and All Data Outputs Switching Simultaneously
- Data Rates up to 67 MHz
- Pin-to-Pin Compatible With SN74ACT7805 and SN74ACT7813
- Packaged in Shrink Small-Outline 300-mil Package Using 25-mil Center-to-Center Spacing
Widebus and OEC are trademarks of Texas Instruments Incorporated.
- Supply voltage (Min) (V)
- 4.5
- Supply voltage (Max) (V)
- 5.5
- Input type
- TTL-Compatible CMOS
- Output type
- 3-State
- Clock Frequency (Max) (MHz)
- 67
- Features
- Programmable Flags, Unidirectional
SN74ACT7803的完整型号有：SN74ACT7803-15DL、SN74ACT7803-25DL，以下是这些产品的关键参数及官网采购报价：
SN74ACT7803-15DL，工作温度：0 to 70，封装：SSOP (DL)-56，包装数量MPQ：20个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网SN74ACT7803-15DL的批量USD价格：18.043（1000+）
SN74ACT7803-25DL，工作温度：0 to 70，封装：SSOP (DL)-56，包装数量MPQ：20个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网SN74ACT7803-25DL的批量USD价格：6.765（1000+）
SN74ACT7803-15DL，工作温度：0 to 70，封装：SSOP (DL)-56，包装数量MPQ：20个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网SN74ACT7803-15DL的批量USD价格：18.043（1000+）
SN74ACT7803-25DL，工作温度：0 to 70，封装：SSOP (DL)-56，包装数量MPQ：20个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网SN74ACT7803-25DL的批量USD价格：6.765（1000+）
