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CY7C964A-ASC

更新时间： 2024-11-30 21:55:39
品牌 Logo 应用领域
赛普拉斯 - CYPRESS /
页数 文件大小 规格书
6页 159K
描述
Bus Interface Logic Circuit

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中文翻译

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CY7C964A-ASC 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：QFP包装说明：LFQFP,
针数：64Reach Compliance Code：unknown
Factory Lead Time：1 week风险等级：5.83
地址总线宽度：8外部数据总线宽度：8
JESD-30 代码：S-PQFP-G64JESD-609代码：e0
长度：10 mm湿度敏感等级：3
端子数量：64封装主体材料：PLASTIC/EPOXY
封装代码：LFQFP封装形状：SQUARE
封装形式：FLATPACK, LOW PROFILE, FINE PITCH峰值回流温度（摄氏度）：240
认证状态：Not Qualified座面最大高度：1.6 mm
表面贴装：YES技术：CMOS
端子面层：TIN LEAD端子形式：GULL WING
端子节距：0.5 mm端子位置：QUAD
处于峰值回流温度下的最长时间：30宽度：10 mm
uPs/uCs/外围集成电路类型：BUS CONTROLLER, VMEBase Number Matches：1

CY7C964A-ASC 数据手册

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PRELIMINARY  
CY7C964A  
Bus Interface Logic Circuit  
case, the controllers provide the control and timing signals to  
the Bus Interface Logic Circuit as it acts as a bridge between  
the VMEbus and the Local bus.  
Features  
• Comparators, counters, latches, and drivers minimize  
logic requirements for a variety of multiplexed and  
non-multiplexed buses  
Application with VMEbus Architecture  
• Directly drives VMEbus address and data signals  
• 8-bit comparator for slave address decoding  
• Flexible interface optimized for VMEbus applications  
• Companion device to Cypress VMEbus family of com-  
ponents  
• Replaces multiple SSI/MSI components  
• Cascadable  
• 64-pin QFP  
Use with Cypress VMEbus Controllers  
The CY7C964A Bus Interface Logic Circuit is a seamless in-  
terface between the VIC068A/VIC64 and the VMEbus signals.  
The device functions equally well in the established 32-bit  
VMEbus arena and the new 64-bit VMEbus standard. The de-  
vice contains three 8-bit counters to fulfill the functions of Block  
counters, and DMA counters as implied by the D64 portion of  
the VMEbus specification. It also contains the necessary mul-  
tiplexing logic to allow the 64-bit-wide VMEbus path to be fun-  
nelled to and from the 32-bit local bus. Control circuitry is in-  
cluded to manage the switching of the 32-bit address bus  
during normal (32-bit) operations, and during MBLT (64-bit)  
operations. The on-chip drivers are capable of driving the  
VMEbus directly (48 mA).  
• See the VMEbus Interface Handbook for more informa-  
tion  
Functional Description  
The CY7C964A integrates severalspace-consumingfunctions  
into one small package, freeing board space for the implemen-  
tation of added-value board features. It contains counters,  
comparators, latches, and drivers configured to be of value to  
implementors of any backplane interface with address and  
data buses, particularly VMEbus interfaces. The on-chip driv-  
ers are suitable for driving the VMEbus directly. The  
CY7C964A is ideal in applications where high-performance  
and real estate are primary concerns.  
Use in Other VMEbus Controller Implementations  
The CY7C964A circuitry is designed to be of use to designers  
of VMEbus circuitry, including VSB (VME subsystem bus) and  
designs not requiring the features of the Cypress VIC068A,  
VIC64, and CY7C960A. The logic diagram includes gener-  
al-purpose blocks of comparators, counters, and latches that  
can be controlled using the flexible control interface to allow  
many different options to be implemented. Although the device  
is offered in a small 64-pin package, the use of multiplexed  
input and output pins provides access to the many internal  
functions, thus saving external circuitry.  
Although having many applications, the Bus Interface Logic  
Circuit is an ideal companion part to Cypress’s VMEbus family  
of components, the VIC068A, VIC64, and the CY7C960A. It is  
intended to drive the address and data buses, so three or four  
of these small devices are needed per controller. In every  
Pin Configuration  
PQFP/CQFP/TQFP  
Top View  
48  
GND  
LD0  
LA0  
GND  
LD7  
1
2
47  
46  
45  
3
4
LDS  
FC1  
STROBE*  
DENIN*  
DENIN1*  
LAEN  
44  
43  
42  
41  
5
6
MWB*  
LCOUT*  
GND  
VCOMP*  
VCOUT*  
LADO  
LADI  
LEDI  
LEDO  
A7  
7
LCIN*  
VCIN*  
VCC  
BLT*  
D64  
8
9
10  
11  
12  
40  
39  
38  
37  
36  
35  
34  
33  
DENO*  
ABEN*  
D0  
13  
14  
15  
A0  
16  
GND  
GND  
C964A-1  
Cypress Semiconductor Corporation  
•
3901 North First Street  
•
San Jose  
•
CA 95134  
•
408-943-2600  
Document #: 38-09001 Rev. *A  
Revised June 12, 2001  
123456

中文翻译

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