SN74ALS869 同步 8 位加/减二进制计数器

These synchronous, presettable, 8-bit up/down counters feature internal-carry look-ahead circuitry for cascading in high-speed counting applications. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincidentally with each other when so instructed by the count-enable (,) inputs and internal gating. This mode of operation eliminates the output counting spikes normally associated with asynchronous (ripple-clock) counters. A buffered clock (CLK) input triggers the eight flip-flops on the rising (positive-going) edge of the clock waveform.

These counters are fully programmable; they may be preset to any number between 0 and 255. The load-input circuitry allows parallel loading of the cascaded counters

	SN74ALS869
Rating	Catalog
Technology Family	ALS

SN74ALS869 特性

• Fully Programmable With Synchronous Counting and Loading
• SN74ALS869 and 'AS867 Have Asynchronous Clear; SN74ALS869 and 'AS869 Have Synchronous Clear
• Fully Independent Clock Circuit Simplifies Use
• Ripple-Carry Output for n-Bit Cascading
• Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (NT) and Ceramic (JT) 300-mil DIPs

SN74ALS869 芯片订购指南

器件	状态	温度	价格	封装 | 引脚	封装数量 | 封装载体	丝印标记
SN74ALS869DW	ACTIVE	0 to 70	3.55 | 1ku	SOIC(DW) | 24	2000 | LARGE T&R
SN74ALS869DWE4	ACTIVE	0 to 70	3.55 | 1ku	SOIC(DW) | 24	2000 | LARGE T&R
SN74ALS869DWG4	ACTIVE	0 to 70	3.55 | 1ku	SOIC(DW) | 24	2000 | LARGE T&R
SN74ALS869N	ACTIVE	0 to 70	3.90 | 1ku	PDIP (N) | 20	20 | TUBE
SN74ALS869NE4	ACTIVE	0 to 70	3.90 | 1ku	PDIP (N) | 20	20 | TUBE

SN74ALS869 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
SN74ALS869DW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	SN74ALS869DW	SN74ALS869DW
SN74ALS869DWE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	SN74ALS869DWE4	SN74ALS869DWE4
SN74ALS869DWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	SN74ALS869DWG4	SN74ALS869DWG4
SN74ALS869N	Pb-Free (RoHS)	CU NIPDAU	N/A for Pkg Type	SN74ALS869N	SN74ALS869N
SN74ALS869NE4	Pb-Free (RoHS)	CU NIPDAU	N/A for Pkg Type	SN74ALS869NE4	SN74ALS869NE4

SN74ALS869 应用技术支持与电子电路设计开发资源下载

1. SN74ALS869 数据资料 dataSheet 下载.PDF
2. TI 德州仪器MSI 功能产品选型与价格 . xls
3. Logic Guide 2009 (PDF 4263 KB)
4. Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
5. Understanding and Interpreting Standard-Logic Data Sheets (PDF 857 KB)
6. TI IBIS File Creation, Validation, and Distribution Processes (PDF 380 KB)
7. Implications of Slow or Floating CMOS Inputs (PDF 101 KB)
8. CMOS Power Consumption and CPD Calculation (PDF 89 KB)
9. Designing With Logic (PDF 186 KB)
10. Live Insertion (PDF 150 KB)
11. Input and Output Characteristics of Digital Integrated Circuits (PDF 1708 KB)
12. Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc (PDF 43 KB)
13. HiRel Unitrode Power Management Brochure (PDF 206 KB)
14. LOGIC Pocket Data Book (PDF 6001 KB)
15. HiRel Unitrode Power Management Brochure (PDF 206 KB)
16. Logic Cross-Reference (PDF 2938 KB)