【选型】国产I²C总线扩展器NCA9555可PTP替代PCA9555,参数封装完全相同
PCA9555是NXP公司的一款I²C总线扩展器,通过SDA和SCL两根信号线连接到PCA9555就可以扩展出16个GPIO接口。有些处理器在某些应用场景使用时,如果自身的GPIO不够用,就可以采用PCA9555通过I2C总线进行扩展,而且一组I2C总线最多可以连接8颗PCA9555,可以扩展最多128个GPIO。
纳芯微电子生产的NCA9555具有和PCA9555一样的功能,文章通过对比两种器件的主要功能、特性,封装等方面,分析是否可以完全进行替代使用,并在实际项目中进行了验证。
器件主要参数对比
从上表可以看出,两种器件的性能参数完全相同,可以替换。
引脚排列对比
从上图来看,两种器件的引脚功能定义和排列顺序完全相同,可以PTP。
封装尺寸对比
PCA9555PW封装尺寸如上图,其中D尺寸为7.8mm,HE尺寸为6.4mm,e尺寸为0.65mm。
NCA9555封装尺寸如上图,其中D尺寸为7.8mm,HE尺寸为6.4mm,e尺寸为0.65mm。从上面的尺寸图可以看出,两个器件的封装尺寸也完全一样,并且引脚间距都为0.65mm。
NCA9555应用电路
1) NCA9555应用框图
该项目是一块网络通信板卡,从处理器引出的PCIex4接口扩展出4路千兆以太网光接口,用于收发数据。因为处理器的GPIO数量不足,而4路光模块每个都有3个状态信号需要连接到处理器,因此采用NCA9555通过I2C总线扩展了16路GPIO,使用其中的12路连接到4个光模块。
2) NCA9555设计原理图
图中NCA9555左边为I2C接口,包含2个总线信号I2C_SCL和I2C_SDA和1个中断信号I2C_INT#。其中I2C_SCL和I2C_SDA在处理器侧已经有上拉电阻,所以这里不需要再加上拉电阻。NCA9555的中断信号I2C_INT#是开漏输出,必须加上拉电阻才能工作,上拉电阻一般取2K-10K。24脚VCC需要外接1颗0.1uF电容去耦,为了改善EMI特性,可以接一颗磁珠(L94)。
总结
通过上面几方面的对比和分析,NCA9555的各项性能参数都与PCA9555PW相同。两种器件的引脚排列和封装尺寸完全一致,因此,用NCA9555 pin to pin替代PCA9555PW是完全可行的。
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纳芯微电子(NOVOSENSE)信号感知芯片/隔离与接口芯片/驱动与采样芯片选型指南(英文)
描述- NOVOSENSE Microelectronics (NOVOSENSE, SSE Stock Code 688052) is a highly robust & reliable analog and mixed signal Chip company. Since its establishment in 2013, the company has been focusing on sensor, signal chain, and power management, providing comprehensive semiconductor products and solutions, which are widely used in automotive, industrial, information communication and consumer electronic
型号- NSI6602NA-DLAR,NSL21924-Q1,NCA1051,NSI6602VC-Q1SWR,NSI6622NB-Q1SWKR,NCA1051N-Q1SPR,NSM2017,NSI6602NC-Q1SWR,NSM2019,NSM211X,NSI6602A-Q1SWKR,NSM2013,NIRS485,NSIP83086,NSI6622VB-Q1SPOR,NSM2015,NSM2016,NSC9260X,NSHT30-CLAR,NSD1624-Q1SPR,NSM2011,NSM2012,NSI8231,NSI8230,NSD2621C-DQAGR,NSR33XXX,NSC9262,NSC9260,NSI6801LC-DDBR,NSI6602VD-Q1SWKR,NSC9264,NSP1830,NSG65N15K-DQAFR,NST112X,NCA1042C-Q1DNR,NCA1042,NCA1042A-Q1DNHR,NSI8220NX,NSI6622A-DSWKR,NSI6801TB-DDBR,NSD1624-DSPKR,NSP1833,NST7719,NSP1831,NSP1832,NSM1052,NSM1053,NSI8222,NSA2860X,NSI8221,NSI8220,NSE5701 SERIES,NSI6642C-DSPNR,NSM1051,NSI822XC,NSIP8921W1-DSWR,NSI6602MNF-Q1SWTR,NSD11416-Q1STBR,NSI6602VB-Q1SPNR,NCA3491,NSI6642A-DLAR,NSI6602NB-Q1SWKR,NSA2860_TSSOP,NSD1026V,NSI8221CX-DSWR,NSE34050,NCA1043B-Q1DNKR,NCA1044N-Q1SPR,NSIP8944W1-DSWR,NSL21912-Q1,NSM201X,NSI6622A-Q1SPNR,NCA1051N-Q1,NSM2031,NSI6602MNB-Q1SWTR,NSD7310A-DHSPR,NSM2032,NCA1145-Q1SPKR,NSM2033,NSI8210,NSM2034,NST112-DSTR,NSI6601MB-DSPR,NSD1015T,NSI8266CX-DSWR,NSI6602VD-DSWKR,NSI8222CX-DSPR,NSM105X SERIES,NSD1015MT-DSPR,NSC2860X_DQNR,NCA1021S-Q1SPR,NSI8262CX-DSWR,NSPGS2,NCA34XX,NCA3485,NCA1051C,NSI68011C-DSWAR,NSI8221NX,NSI6602NC-DLAMR,NST1002,NSPGS5,NSM211X SERIES,NSI6602VC-DLAMR,NST1001,NCA1042C-Q1,NSI6602A-DLAR,NSI6602ND-DSWKR,NSM105X,NSD16241-Q1SPR,NSI1303M0X,NSM3011,NSPAS3M SERIES,NSI8240CX-DSPR,NSD7312-Q1,NSM3013,NSM3012,NSA2860_SSOP16,NSA2862X,NSI6642B-DSWKR,NSM1071,NSM1072,NSI823XC,NSI6642A-DLAMR,NSD5604N,NSI319X,NSI6642D-DLAR,NSI8100NC,NSI6602B-Q1SWR,NSI6622ND-DSPNR,NSI6601B-DSPR,NSA2860X-QQNR,NSI8210NX,NSI6642D-DSWKR,NSI6602MF-DSWTR,NSD5604E,NIRSP31,NSI6602MNB-DSWTR,NST175,NST1075,NSI6602A-DSPNR,NCA9617A SERIES,NSI68010B-Q1SWAR,NSI1312D,NSI6642B-DSWR,NSI8222NX,NSI6601C-DSPR,NSI6622NB-DLAR,NSIP8841W1-DSWR,NSP1631,NSI8221CX-DSWVR,NSP1632,NSP1630,NSD56008-Q1HTSPR,NSI6622C-DLAR,NSM301X,NSM107X,NSI824XC,NSI6602VA-Q1SPNR,NSI6602ND-DLAR,NSI6801C-DSWFR,NSD3604-Q1,NCA3176,NSI6801MB-DSWVR,NSD3608-Q1QAJR,NSI1312S,NSI6622VB-Q1SWR,NSI6622B-Q1SPNR,NSD5604N-DHTSPR,NSD1624-DLAJR,NSI68011C-Q1SWAR,NSI6602VA-DLAMR,NSI6602NA-DLAMR,NSI6602NB-DSWR,NSD5604E-DHTSTR,NSR35XXX,NSI6622NB-Q1SWR,NSD5604N-Q1HTSPR,NSD1224X,NSI6602C-Q1SPNR,NSI8100W,NSI6622NA-DSPNR,NSIP8844W1-DSWR,NSI6622NB-DSWKR,NSE5702,NSE5701,NSI8100N,NSP183X,NCA1044-Q1DNR,NSI6622NC-DLAR,NCA1021S-Q1DNR,NSI6622VB-Q1SPNR,NCA1044N-Q1DNR,NSD16241-DSPKR,NSI3190,NSI6602VD-DSWR,NPC060N120A-QTOOT,NSI6622NA-Q1SWKR,NSE34050Q,NSD1224LA-DAFR,NSI8241SX,NSI6622NA-Q1SWR,NSI6622NC-Q1SPNR,NSI8231CX-DSWR,NSI1052-DSWR,NSPGL1 SERIES,NSI6622VA-Q1SPOR,NSA2860X_QQNR,NSI6801B-DSWFR,NSI6602B-Q1SPNR,NSI6601WC-DSWVR,NSI6651ASC-Q1SWR,NSC6272,NSI8263CX-DSWR,NSD8310-Q1HTSXR,NSC6273,NSREF31XX,NSI6622ND-DSWR,NSI6622NC-DSPNR,NSI6602NB-DLAR,NSI6602NB-DSPNR,NSA5312,NSI6622VC-Q1SWKR,NSPGL1,NSI6602A-Q1SWR,NSI6622NC-Q1SPOR,NSPGS2 SERIES,NSI6642C-DLAMR,NSR7808,NSI8220WX,NSI8266WX,NSD56008-Q1,NSD5604NE,NSI6622VA-Q1SPNR,NSI6602VB-DSWKR,NSL2161X-Q1,NCA1042BN-Q1SPR,NCA1057-Q1SPR,NCA1043B-Q1,NCA9511,NSI6602A-DSWR,NSC6280,NSI6602NA-Q1SWKR,NSD8308-Q1,NSI6602NC-DSWR,NSI6801TC-DDBR,NSI8242SX,NSI68515AC-DSWR,NSI6602B-DSWKR,NSI6602VD-DLAMR,NPCO60N120A-QTOIT,NSI8220CX-DSWVR,NSI6622NB-DSWR,NST235,NST117,NSI6602VC-DSWKR,NSI6602VC-Q1SWKR,NSI6602MB-DSWDR,NST118,NCA954X SERIES,NSD16242-Q1SPR,NCA9306 SERIES,NCA1044-Q1SPR,NSI6651,NSI6642B-DLAMR,NSI6602C-DSWKR,NSI8240NX,NSE34050 SERIES,NCA1057N-Q1DNR,NSP163X,NSI6602NC-DSPNR,NCA1042BN-Q1,NSI8221WX,NSI66X2,NSI6631ASC-Q1SWR,NSI6602MNC-DSWTR,NCA1042B-Q1DNR,NSI6642,NSI6601C-DSWVR,NIRS2X,NSI6601MB-DSWR,NSI8266SX,NSI6602NB-Q1SPOR,NCA34XX SERIES,NSI6602NC-Q1SPOR,NSD7310A,NSD8306-Q1,NSI6622ND-DLAMR,NSG65N15K,NSD12409-Q1SPR,NSE4250 SERIES,NCA1042CN-DSPR,NSI6602VA-DSWKR,NSI6642D-DLAMR,NCA1051N,NSI6642A-DSWKR,NIRS20N1-DSPR,NIRS21N1-DSPR,NSI6622NA-DLAR,NSC2860X-DQNR,NSI1042-DSWVR,NCA1042C-Q1SPR,NSI6602C-DSWR,NCA1057-Q1DNR,NSI8221CX-DSPR,NPD010N120A-DTOGT,NSI6602VB-Q1SWR,NSI8210CX-DSPR,NSD1026V-QISPR,NSD12416‒Q1,NSI1050-DDBR,NSI8241NX,NSI6602NC-Q1SPNR,NCA1042BN-Q1DNR,NSR10AXX SERIES,NST461,NSD2621X,NCA1042A-Q1,NSI8222WX,NST103,NSI1303D0X,NSI1303E2X,NSI6622A-Q1SWKR,NSI6602VC-DLAR,NSR31 SERIES,NSD16242-DSPR,NCA9555,NSI1052,NSC6360,NSC6362,NSI6622NB-DLAMR,NSI6651ALC-DSWR,NSC6364,NSI6602NA-DSPNR,NSI6622A-DLAR,NSI6622C-Q1SPNR,NCA1042C,NSI8220CX-DSWR,NSI6622C-DSPNR,NSA3166,NCA1042A-Q1SPR,NSIP8941W0-DSWR,NSI6642B-DLAR,NCA1042B-Q1,NSPGD1M,NSPAS3 SERIES,NSD1624-DSPR,NSI6602VA-Q1SWR,NSD1026V-Q1HMSR,NSI8242CX-DSWR,NSI6602MNC-Q1SWTR,NSL2163X-Q1,NST20,NIRS31,NSREF30XX,NCA9545,NSI6622NA-DLAMR,NSI1042,NSI6611,NCA9546,NSI6622B-DSPNR,NCA9306,NCA9548,NSD12416-Q1SPR,NSI6602MC-Q1SWTR,NSI8242NX,NSD8381-Q1QAIR,NSD8308-Q1HTSXR,NCA9617A,NST1001HA,NSI6602VA-DSWR,NSI1303D2X,NSI1050,NSI6601B-DSWVR,NSD7310-DHSPR,NSI6601,NSD731X-Q1,NCA1057N-Q1SPR,NSR7808GXX,NSD7312-Q1HSPR,NSI6602VB-DLAMR,NSI6602MNF-DSWTR,NSD1026V-DHMSR,NSA3300,NSI6602C-Q1SWKR,NSC2860X,NSD11416‒Q1,NSI6622NB-Q1SPNR,NCA1051N-DSPR,NSI6611ASC-DSWR,NSI22C11,NSI8230CX-DSWR,NSI6801B-DSPR,NSI6622A-DSPNR,NSD12409‒Q1,NSD5604NE-DHTSTR,NSPDSX SERI
【应用】纳芯微低功耗I²C总线扩展器NCA9555用于显示屏驱动板卡,具备16位I/O口
针对某客户的高端显示屏驱动板卡设计,本文推荐纳芯微I²C扩展芯片NCA9555,带中断的16位I²C总线I/O端口,可通过I²C总线扩展出16位通用GPIO接口;支持工作电源电压范围为2.3V至5.5V,待机功耗0.25μA。
应用方案 发布时间 : 2023-01-06
【应用】纳芯微I²C总线扩展器NCA9555应用于FCT测试设备,待机功耗低至0.25μA
FCT即功能测试,它指的是针对测试目标板提供模拟的运行环境,激励和负载,控制执行部分主要由I/O部件组成,多器件之间互连所导致的超长走线进一步影响增加控制总线布局难度,这时就需要用到NCA9555 I²C总线扩展器满足功能拓展需求。
应用方案 发布时间 : 2021-11-28
NOVOSENSE Industrial Control Solution
型号- NSI6801,NSI1311,NSI1312,NSI824X,NSAD114X,NCA8244,NCA8245,NSM2017,NSM211X,NST175,NSM2019,NSM2013,NSI22C11,NSI68515,NSM2015,NSM2011,NSD5604,NSM2012,NSA2862X,NSR33XXX,NST86,NSOPA9XXX,NSI1300,NSI6801M,NSREF31XX,NSI1306,NST112X,NSI1303,NCA1044,NSI1305,NSR7808,NSE11409,NSI8266,NSI8100,NSR28C4X,NIRS21,NSI8260,NSOPA8XXX,NCA9555,NSI1200C,NSD1026V,NCA1042B,NSAD124X,NSD12416,NSI8608,NCA3176,NSCSA24X,NSI83086,NSM201X,NSI83085,NSM2113,NSM2311,NST235,NSR31XXX,NSA2860X,NST60,NSD1624,NST20,NIRS31,NSR104XX,NSR35XXX,NSD1224,NSREF30XX,NSCSA199,NSI1200,NSI1042,NSI1400,NSCSA21X,NSD11416,NSC2860X,NSI22C12,NCA1051A,NCA3485,NST1002,NST1001,NSI82XX,NSI8200,NSI1050
【应用】国产纳芯微I²C和SMBus双路双向缓冲器NCA9617应用于工业机器人,I²C总线电容可达550pF
某客户在设计工业机器人主控系统时,选用纳芯微的I²C和SMBus双路双向缓冲器用来隔离总线片段的电容量,从而允许I²C在较长电缆或电路板连线上传送,并且在进行电平转换期间也不会降低性能,从而扩展I²C总线系统。
应用方案 发布时间 : 2022-09-14
Renewable Energy & Power Supply Application Solution
型号- NSI6801,NSI1311,NSI6601,NSI1312,NSIP884X,NSI824X,NCA8244,NSM2017,NIRSP31,NSM2019,NSM211X,NSIP83086,NSM2013,NSM2015,NSI68515,NSM2011,NSR33XXX,NSOPA9XXX,NSI1300,NSI6801M,NSI83008XE,NPD0X0N120A,NSI823X,NSIP21,NSREF31XX,NPS0X0N065A,NSR2240X,NCA1043,NSR7808,NSI8100,NSHT3X,NSD7312,NSD2621,NSR28C4X,NIRS21,NSIP8942,NSOPA8XXX,NCA9555,NSI1200C,NSI822X,NSIP31,NSIP894X,NSD1026V,NCA1042B,NCA3176,NSCSA24X,NSI83086,NSI83085,NSI6602V,NSM2311,NSM2113,NST235,NSR31XXX,NSIP1042,NSD1624,NPI030N065A,NST20,NSR35XXX,NSR104XX,NIRS31,NSD1224,NSREF30XX,NPC0X0N120A,NSI1042,NSI6611,NSI1400,NSCSA21X,NCA1043B,NCA1051A,NSI6601M,NCA3485,NCA1042B2,NST1002,NST1001,NSI82XX,NSI8200,NSI1050,NSI3190
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可定制波导隔离器频率覆盖5.5GHz~110GHz,插损损低至0.25dB、隔离度、正向方向功率、封装尺寸参数。
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