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NAT9914BPQF-84 PDF预览

NAT9914BPQF-84

更新时间: 2024-02-22 18:25:19
品牌 Logo 应用领域
美国国家仪器公司 - NI 时钟驱动外围集成电路驱动器
页数 文件大小 规格书
12页 1008K
描述
GPIB Bus Controller, CMOS, PQFP44, ROHS COMPLIANT, PLASTIC, QFP-44

NAT9914BPQF-84 技术参数

是否Rohs认证:符合生命周期:Contact Manufacturer
包装说明:QFP,Reach Compliance Code:unknown
风险等级:5.67Is Samacsys:N
总线兼容性:68000; 68440; 80186最大时钟频率:20 MHz
驱动器接口标准:IEEE 488外部数据总线宽度:8
JESD-30 代码:S-PQFP-G44长度:14 mm
端子数量:44最高工作温度:70 °C
最低工作温度:封装主体材料:PLASTIC/EPOXY
封装代码:QFP封装形状:SQUARE
封装形式:FLATPACK峰值回流温度(摄氏度):NOT SPECIFIED
座面最大高度:2.35 mm最大供电电压:5.25 V
最小供电电压:4.75 V标称供电电压:5 V
表面贴装:YES技术:CMOS
温度等级:COMMERCIAL端子形式:GULL WING
端子节距:1 mm端子位置:QUAD
处于峰值回流温度下的最长时间:NOT SPECIFIED宽度:14 mm
uPs/uCs/外围集成电路类型:BUS CONTROLLER, IEEE 488 (GPIB)Base Number Matches:1

NAT9914BPQF-84 数据手册

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IEEE 488.2 Controller Chip  
NAT9914  
Available as RoHS-compliant  
Automatically processes IEEE 488  
commands and reads undened  
commands  
TTL-compatible CMOS device  
Programmable clock rate  
20 MHz maximum  
Reduces driver overhead  
Does not lose a data byte  
if ATN is asserted while  
transmitting data  
Pin compatible with TI TMS9914A  
Software compatible with NEC µPD7210  
or TI TMS9914A controller chips  
Low power consumption  
Meets all IEEE 488.2 requirements  
Bus line monitoring  
Preferred implementation of  
requesting service  
Will not send messages when there  
are no Listeners  
Performs all IEEE 488.1 interface  
functions  
Programmable data transfer rate  
(T1 delays of 350 ns, 500 ns, 1.1 µs,  
and 2 µs)  
Automatic EOS and/or NL message  
detection  
Direct memory access (DMA)  
Description  
General  
The NAT9914 IEEE 488.2 controller chip can perform all the  
interface functions dened by the IEEE Standard 488.1-1987,  
and also meets the additional requirements and  
The NAT9914 manages the IEEE 488 bus. You program the  
IEEE 488 bus by writing control words into the appropriate  
registers. CPU-readable status registers supply operational  
feedback. The NAT9914 mode determines the function of  
these registers. On power up or reset, the NAT9914 registers  
resemble those of the TMS9914A set, with additional registers  
that supply extra functionality and IEEE 488.2 compatibility. In  
this mode, the NAT9914 is completely pin compatible with the  
TI TMS9914A. If you enable the 7210 mode, the registers  
resemble those of the NEC µPD7210 set, with additional  
registers that supply extra functionality and IEEE 488.2  
compatibility. This mode is not pin compatible with the  
NEC µPD7210. Figure 4 shows the key components of the  
NAT9914.  
recommendations of the IEEE Standard 488.2-1987.  
Connected between the processor and the IEEE 488 bus, the  
NAT9914 provides high-level management of the IEEE 488  
bus, signicantly increases the throughput of driver software,  
and simplifies both the hardware and software design. The  
NAT9914 performs complete IEEE 488 Talker, Listener,  
and Controller functions. In addition to its numerous  
improvements, the NAT9914 is also completely pin  
compatible with the TI TMS 9914A and software compatible  
with the NEC µPD7210 and TI TMS9914A controller chips.  
IEEE 488.2 Overview  
RoHS Compliance  
The IEEE 488.2 standard removes the ambiguities of  
IEEE 488.1 by standardizing the way instruments and  
controllers operate. It defines data formats, status reporting,  
error handling, and common configuration commands to  
which all IEEE 488.2 instruments must respond in a precise  
manner. It also denes a set of controller requirements. With  
IEEE 488.2, you gain the benets of reduced development time  
and cost because systems are more compatible and reliable.  
The NAT9914 brings the full power of IEEE 488.2 to the  
design engineer along with numerous other design and  
performance benefits, while retaining the 40-pin and 44-pin  
hardware congurations of the TI TMS 9914A.  
The NAT9914 is currently available from NI both in a standard  
package and as a RoHS-compliant chip. The chips can be  
ordered using the part numbers shown in the Ordering  
Information box below. The RoHS-compliant parts are  
identified through the added “F” at the end of the part number  
and the chip itself is marked with an e3 inside an ellipse to  
indicate a matte pure tin finish on the leads, in accordance  
with the marking recommendations defined in JEDEC  
JESD97.  
The RoHS-compliant NAT9914 meets industry requirements  
for baking and maximum solder reflow temperature. The  
baking requirements are outlined in JEDEC J-STD-033, and  

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