SN74ACT7805 256 x 18 同步 FIFO 存储器

The SN74ACT7805 is a 256-word × 18-bit clocked FIFO suited for buffering asynchronous data paths 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 IR is high. Data is read from memory on the rising edge of RDCLK when RDEN\, OE1\, and OE2\ are low and OR is high. The first word written to memory is clocked through to the output buffer, regardless of the RDEN\, OE1\, and OE2\ levels

	SN74ACT7805
Depth	256
Width	18
Fmax(MHz)	67
Sync/Async	S
Voltage Nodes(V)	5
Technology Family	ACT
Output Drive(mA)	-8/16
Rating	Catalog

SN74ACT7805 特性

• 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
• 256 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 SN74ACT7803 and SN74ACT7813
• Packaged in Shrink Small-Outline 300-mil Package Using 25-mil Center-to-Center Spacing

SN74ACT7805 芯片订购指南

器件	状态	温度	价格（美元）	封装 | 引脚	封装数量 | 封装载体	丝印标记
1M7805-15DLG4	ACTIVE	0 to 70	9.46 | 1ku	SSOP (DL) | 56	20 | TUBE
SN74ACT7805-15DL	ACTIVE	0 to 70	9.46 | 1ku	SSOP (DL) | 56	20 | TUBE
SN74ACT7805-15DLR	ACTIVE	0 to 70	5.27 | 1ku	SSOP (DL) | 56	1000 | LARGE T&R
SN74ACT7805-25DL	ACTIVE	0 to 70	9.24 | 1ku	SSOP (DL) | 56	20 | TUBE
SN74ACT7805-40DL	ACTIVE	0 to 70	9.24 | 1ku	SSOP (DL) | 56	20 | TUBE

SN74ACT7805 质量与无铅数据

器件	环保计划*	铅/焊球涂层	MSL 等级/回流焊峰	环保信息与无铅 (Pb-free)	DPPM / MTBF / FIT 率
1M7805-15DLG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	1M7805-15DLG4	1M7805-15DLG4
SN74ACT7805-15DL	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	SN74ACT7805-15DL	SN74ACT7805-15DL
SN74ACT7805-15DLR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	SN74ACT7805-15DLR	SN74ACT7805-15DLR
SN74ACT7805-25DL	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	SN74ACT7805-25DL	SN74ACT7805-25DL
SN74ACT7805-40DL	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	SN74ACT7805-40DL	SN74ACT7805-40DL

SN74ACT7805 应用技术支持与电子电路设计开发资源下载

1. SN74ACT7805 数据资料 dataSheet 下载.PDF
2. TI 德州仪器特殊逻辑产品选型与价格 . xls
3. Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
4. Understanding and Interpreting Standard-Logic Data Sheets (PDF 857 KB)
5. TI IBIS File Creation, Validation, and Distribution Processes (PDF 380 KB)
6. Implications of Slow or Floating CMOS Inputs (PDF 101 KB)
7. CMOS Power Consumption and CPD Calculation (PDF 89 KB)
8. Designing With Logic (PDF 186 KB)
9. Live Insertion (PDF 150 KB)
10. Input and Output Characteristics of Digital Integrated Circuits (PDF 1708 KB)
11. Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc (PDF 43 KB)
12. HiRel Unitrode Power Management Brochure (PDF 206 KB)
13. LOGIC Pocket Data Book (PDF 6001 KB)
14. HiRel Unitrode Power Management Brochure (PDF 206 KB)
15. Logic Cross-Reference (PDF 2938 KB)