【经验】高速电平转换芯片SGM4553解决光模块I2C通讯中电平偏低引起通讯错误的问题

时间： 2020-02-13 来源：世强

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光纤通讯在信息传输中有着不可或缺的地位。在光纤通讯系统中，一台主机往往需要连接多个光模块。光模块和主机之间需要通过I2C进行数据交互。光模块的I2C作为从端进行通讯。

图1 光纤通讯

某些通讯主机的光模块连接端口的I2C总线是一条总线，驱动能力有限，且光模块的I2C作为从端，不能带有上拉电阻。连接的光模块数量越多，I2C总线的波形上升沿就会趋缓，导致MCU识别错误，影响正常通讯。

图2 C2D上拉能力弱导致上升时间达不到要求

如图2所示，该通讯错误，是由于I2C的C2D的驱动能力不足，上升缓慢，在I2C时序要求范围内，C2D的电压低于2.2V，导致MCU无法识别为高电平，从而影响通讯。直接的解决办法是提高I2C总线的驱动能力，但是光模块作为通讯从端，不能使用上拉电阻，无法提高总线驱动能力，需要采用其他方法解决问题。

图3 使用SGM4553解决I2C电平问题

为了解决这个问题，可以在MCU和光模块的金手指之间增加一颗圣邦微的电平转换芯片SGM4553。

图4 SGM4553的电气特性

圣邦微的SGM4553芯片是双路高速电平转换芯片，在开漏输出的运用中，速度可达2Mbps，完全满足I2C的通讯需求。高电平的识别阀值和IO口的输入电压VCCI有关，没有输入电平低不能识别的情况。所以能有效的解决上述问题。

SGM4553采用环保型SOT-23-8和XTDFN-1.4×1-8L封装，其中，XTDFN-1.4×1-8L封装的尺寸仅1.4mm*1.0mm*0.35mm，体积超小，满足光模块小体积的要求。

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描述- SGMICRO specializes in high-performance and high-quality analog and mixed-signal integrated circuits, and is committed to building a comprehensive portfolio of the highest quality analog and mixed-signal integrated circuits to address all customer needs.

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

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SGMICRO（圣邦微）信号链和电源管理芯片选型指南

目录- Company Profile Amplifiers Comparators Data Converters Voltage References Audio/Video Drivers Analog Switches Logic Ics Temperature Sensors RF Switches Supervisory Circuits LDOs System Power Management Ics Battery Management Ics LED Drivers LCD & OLED Display Powers and Drivers Switch Mode Power Ics Application-Specific Auxiliary Powers Motor/Gate Driver Index

型号- SGM61450,SGM3733B,SGM2558A,SGM5347-12,SGM2558B,SGM8261-5,SGM2564,SGM8261-1,SGM5347-10,SGM8261-2,SGM2549,SGM48017C,SGM72110,SGM8094,SGM836,SGM8091,SGM837,SGM61220,SGM8092,SGM8093,SGM835,SGM72108,SGM2553,SGM72106,SGM2555,SGM809B,SGM4519,SGM4517,SGM48018,SGM4518,SGM48010,SGM63600,SGM4520,SGM4521,SGM48005,SGM8417-4,SGM8417-2,SGM4051C,SGM48000,SGM48001,SGM48002,SGM3843A,SGM61433,SGM84782,SGM621,SGM58031,SGM620,SGM41600,SGM2572,SGM41603,SGM2571,SGM2574,SGM51622H,SGM4995,SGM4511,SGM4996,SGM4512,SGM2576,SGM2575,SGM4510,SGM2578,SGM4515,SGM4516,SGM8250-1,SGM8250-2,SGM4514,SGM3209,SGM809,SGM8557-3,SGM8557-1,SGM8557-2,SGM803,SGM61012,SGM804,SGM802,SGM61013,SGM810,SGM811,SGM4782,SGM7237B,SGM8902,SGM8903,SGM8904,SGM4542,SGM8905,SGM4548,SGM4549,SGM3699,SGM4546,SGM4547,SGM48013C,SGM62110,SGM61020,SGM62112,AAP6153A,SGM61022,SGM62111,SGM800,SGM2553/D,SGM2596,SGM3200,SGM3206,SGM8270-2,SGM3207,SGM4535,SGM3204,SGM8270-4,SGM8T245,SGM829,SGM61230,SGM42512,SGM41664,SGM825,SGM823,SGM61234,SGM824,SGM891B,SGM832,SGM42507,SGM42506,SGM830,SGM831,SGM4563,SGM40567,SGM4560,SGM42505,SGM4561,SGM6503,SGM4566,SGM6502,SGM8925,SGM6501,SGM8926,SGM4564,SGM8927,SGM5349-16,SGM6505,SGM4568,SGM6504,SGM8909,SGM890B,SGM816,SGM42501,SGM40565,SGM42500,SGM814,SGM815,SGM812,SGM40560,SGM40561,SGM821,SGM822,SGM820,SGM4551,SGM4552,SGM4550,SGM4555,SGM4556,SGM4553,SGM4554,FT2910,SGM8910,SGM5347-8,SGM4558,SGM11124F,74LVC2T45,SGM893B,SGM4581,SGM8941,SGM4582,SGM4583,SGM8704,SGM4588,SGM8705,SGM4589,SGM8706,SGM8707,SGM8942,SGM8701,SGM8702,SGM8703,SGM12213A,SGM892B,SGM6510,SGM8276-4,SGM4573,SGM3001,SGM4574,SGM42513,SGM6514,SGM6513,SGM3005,SGM4578,SGM6512,SGM8276-2,SGM3002,SGM42622B,SGM6511,SGM8276-1,SGM3003,SGM4576,SGMOP17C,SGM6518,SGM8931,SGM8932,SGM6516,SGM12214A,SGM8933,SGM6515,SGM8934,74AVC8T245,SGM3141B,SGM42553,SGM61031,SGM62116,SGM62115,SGM8953-1,SGM62118,SGM8953-2,SGM62117,SGM8708,SGM8709,SGM4075-2,SGM3140B,SGM4075-1,SGM42544,SGM7300A,SGM7300B,SGM42541,SGM42540,SGM8951,SGM8710,SGM8952,SGM5200,SGM38045,SGM38042,SGM6533,SGM8711,SGM8712,SGM8955,SGM38046,SGM8956,SGM8199L2,LM2904,SGM8199L1,SGM41002,SGM8968-4,SGM8968-2,LM2902,SGM8968-1,SGM8740,SGM8741,SGM8742,SGM8743,SGM8263-1,SGM8748,SGM8263-2,SGM8417-1,SGM8749,SGM8744,SGM40666B,SGM8745,SGM40666A,SGM8746,SGM8747,SGM41513D,SGM41513A,SGM42561,SGM42560,SGM8957-1,SGM8957-2,SGM42562,SGM5208-14,SGM5223,SGM48018C,SGM11102F,SGM41512A,SGM37603A,SGM8521,SGM8522,SGM5018,74LVTN16244,74LVTN16245,SGM8524,SGM8604-1,SGM11103F,SGM8193A3,SGM8604-5,SGM8193A2,SGM8604-2,SGM48019C,SGM8193A1,SGM8604-3,SGM8193A0,SGM37604A,SGM8751,SGM41007,SGM41008,SGM6332,SGM8750,SGM41280,SGM41281,SGM41283,SGM5353-16,SGM37891A,SGM41285,SGM41286,SGM8542,SGM51652H8,SGM8301,SGM8543,SGM8302,SGM8544,SGM8545,SGM51652H4,SGM8541,SGM8429C-4,SGM8304,SGM37892A,SGM8531,SGM8773,SGM8532,SGM8774,SGM8534,74LVTH125,SGM8770,SGM8771,SGM8772,SGM8535,SGM8536,SGM8537,SGM8538,SGM65230,74LVC2G04,SGM37893A,SGM65231,74LVC2G08,SGM65232,SGM8969-2,SGM8969-1,SGM2035C,SGM7232,SGM9128YP,SGM41291,SGM2036S,74LVC1G32Q,74LVC2G14,SGM13001C,SGM13001B,SGM2581E,74LVC138,SGM8958-2,SGM41295,SGM13001A,SGM8958-1,SGM7222,SGM6132,SGM8554,SGM7223,SGM8555,SGM7224,SGM6130,SGM8556,SGM2581C,SGM7220,SGM2581A,SGM8551,SGM8552,SGM7226,SGM7227,SGM7228,SGM7229,SGM44599,SGM8581,SGM7SZ32,SGM8713A-1,SGM8582,SGM6613A,SGM8584,SGM41282C,SGM8714B-1,SGM8924A,SGM58XXX,SGM5355-16,SGM7SZ19,74LVC1G125,SGM89000,SGM811B,SGM7SZ14,SGM48752X,SGM431VB,SGM2560A,SGM37603,SGM2560B,SGM6611C,SGM810B,SGM7SZ08,SGM7SZ04,SGM8591,SGM7SZ00,SGM8592,SGM9203,SGM6612A,SGM8594,SGM8922A,SGM4T245,SGM48753,SGM48754,SGM48755,SGM48756,SGM48757,SGM813B,SGM48759,74AVC4T245,SGM8140,SGM8141,SGM48751,SGM449,SGMNQ07430,SGM48752,SGM48510,SGM458,SGM3785S,SGM459,SGM457,SGM8142,SGM452,SGM450,SGM451,SGM37862,SGM37861,SGM812B,74GTL2005,SGM447,SGM448,SGM446,SGM7SZ244,SGM8478-1C,SGM7SZ245,SGM8139,SGM48537,SGM48538,SGM48539,SGM5351-16,SGM2588G,74LVCN16373,SGM2588E,SGM61032A,SGM2588K,SGM61032B,SGM2588I,SGM3712,SGM2588C,SGM3713,SGM3710,SGM2588A,SGM3711,SGM48523,SGM48524,SGM48525,SGM48526,SGM48760,SGM48520,SGM8557-5,SGM71XX,SGM706B,SGM3700,SGM3727,SGM3741B,SGM3725,SGM3726,SGMOP07,SGM898,SGM899,SGM896,SGM897,SGM895,SGM61030A,SGM61030B,SGM2566B,SGM4823,SGM3735,SGM3732,SGM2566A,SGM4822,SGM3716,SGM3740B,SGM4806,SGM3717,SGM3714,SGM3715,SGM4809,SGM4807,SGM3718,SGM4808,SGM3719,74LVC157,SGM48780,SGM48540,SGM37898,SGM51652H,SGM3720,SGM37891,SGM4812,SGM37892,SGM2567A,SGM4810,SGM37895,SGM3749,SGM3747,SGM3748,74LVTH16244,SGM72204A,SGMNQ40430,SGM432,74AHCT86,SGM431,SGM3752,SGM3753,SGM3750,SGM3756,SGM3757,SGM3755,SGM3738,SGM4825,SGM3736,SGM4826,SGM7SZ86,SGM3851A,SGM8198,SGM3741,SGM660,SGM3740,SGM3743,SGM41562B,SGM724,SGM72112B,SGM5209-14,SGM72112A,SGM2200,SGM4863,SGM2202,SGM2201,SGM2204,SGM2203,SGM2206,SGM4865,SGM2205,SGM3758,SGM3759,SGM8416-4,SGM722,SGM723,SGM721,SGM3760,SGM72004B,SGMNM45412,SGM8295-2,SGM8295-4,SGM8480-2,SGM2523C,SGM2523D,SGM2523A,SGM8295-1,SGM2523B,SGM3766,SGM4040B,SGM790A,SGM330A,SGM790B,SGM790C,SGM41100A,SGM41100V,SGM41100W,SGM2220,SGM8262-2,SGM8416-1,SGM2221

2023/4/7 - SGMICRO - 选型指南代理服务技术支持现货查询批量订货

SGMicro（圣邦微） SGM4553高速双电平移位器和驱动器数据手册

型号- SGM4553YXDO8G/TR,SGM4553YN8G/TR,SGM4553

2014年06月18日 - SGMICRO - 数据手册 - REV. A 代理服务技术支持现货查询批量订货

SGM4553YN8G/TR PcbLib & SchLib & IntLib

型号- SGM4553YN8G/TR

2024/8/7 - SGMICRO - CAD模型库代理服务技术支持现货查询批量订货

【选型】国产电平转换芯片SGM4578YTS20可P2P替代TI TXS0108EPWR，数据转换速率可达2Mbps

在温湿度记录仪应用中主控MCU与LTE远传模组间互连一般需要电平转换芯片实现3.3V与5V电平信号转换。世强服务的客户现采用TI TXS0108EPWR，考虑到货期等因素希望国产替代。本文推荐替换物料为国内厂牌圣邦微电子（SGMICRO）的SGM4578YTS20。

2021-11-09 - 器件选型代理服务技术支持现货查询批量订货

【选型】国产SGM4T245电平转换芯片可PTP替换TI的SN74AVC4T245,工作电压1.2-5.0V

电平转换芯片应用于两个不同电平的信号相连接的场合，比如有些5V电平的信号要转化为3.3V的信号，就需要用到电平转换芯片。本文介绍一款国产圣邦微的SGM4T245，具有可配置电压转换的4位双电源电平转换芯片，可pin to pin替换TI的SN74AVC4T245，工作电压范围更宽，电流驱动能力更强。

2021-07-10 - 器件选型代理服务技术支持现货查询批量订货

SGM4553 2-Bit Bidirectional Voltage-Level Translator for Open-Drain and Push-Pull Applications

型号- SGM4553YXDO8G/TR,SGM4553YN8G/TR,SGM4553

JUNE 2018 - SGMICRO - 数据手册 - REV. A. 2 代理服务技术支持现货查询批量订货

【成功案例】国产低压差LDO SGM2019成功应用在便携式手持设备锂电池供电

笔者公司开发的一款便携式手持设备采用锂电池供电，由于锂电池是3.7V电平输入，而MCU和一些逻辑器件是3.3V电平输入。3.7V与3.3V之间需要电平转换，传统电源转换芯片某司XX1117输入与输出之间至少要保持800mV的压差；不能满足当前的应用环境，SGMICRO SGM2019在最大输出电流300mA下，最小压差仅270mV满足当前的使用条件。

2019-01-16 - 应用方案代理服务技术支持现货查询批量订货

成都电科星拓科技有限公司产品介绍

型号- XSAT系列,PEFS1215,TGEN6308,INTL9548,INTL9306,TGEN6309,INTL9544,INTL9545,XUSB系列,INTL9546,INTL系列,OCDR2822,TBUF系列,OCDR281X,STMP112,STMP431,STMP432,TBUF1308,PSTD0601,PSTD1612,TGEN6310,XSAT2102A,TBUF0210,INTL9617,XSAT2204,XSAT2202,XUSB,OCDR2814,OCDR2811,PSTD1606,RCD,OCDR280X,TBUF0208,STMP系列,TGEN系列,XUSB2102,TBUF0320,INTL3306,TGEN6302,XUSB2104,TGEN6304,MSPD系列,MSPD,TBUF0204,STMP75,OCDR,XSAT,INTL9641,OCDR2801,PEFS0505,PMIC5001,PMIC5002,PMIC5003,OCDR2804,TBUF,INTL3416,PSTD1630,XSAT2104A,RCD系列,XSAT2104,STMP,INTL9554,INTL9555,INTL9511,RCD5001,MSPD5118,TGEN6310B,PEFS1205,TBUF0308,STMP464,OCDR系列,TBUF0306,STMP5111,TGEN6320,INTL3524,TBUF1510,PSTD1620,PEFS1250,RCD5002,TGEN,RCD5003,TBUF0304,INTL3528,INTL

2024/6/20 - 电科星拓 - 商品及供应商介绍代理服务技术支持现货查询批量订货

SGM4553YXET 2-Bit Bidirectional Voltage-Level Translator for Open-Drain and Push-Pull Applications

型号- SGM4553YXET,SGM4553YXET8G/TR

OCTOBER 2023 - SGMICRO - 数据手册 - REV. A 代理服务技术支持现货查询批量订货

SGMICRO国产小逻辑系列芯片，速度快、功耗低、工作电压宽，逻辑种类丰富

圣邦微电子（北京）股份有限公司（SGMICRO Corp）是一家专注于高性能、高品质模拟集成电路研发和销售的半导体公司。SGMICRO推出的逻辑系列芯片包括与非门、反相器、与门、或门、异或门、缓冲器等，这些逻辑电平转换芯片在CA卡、Smart Card、HDMI、I2C、GPIO接口电平转换领域有着广泛的应用。

2019-01-15 - 器件选型代理服务技术支持现货查询批量订货

【应用】8位双向电压电平转换器SGM4568助力家用安防网关设计，1.2V至5.5V的输入范围

家用安防网关设计中需要一款高性能的多通道电平转化芯片，连通各个芯片之间的通讯。推荐使用SGMICRO公司推出的具有自动方向感应的8位双向电压电平转换器SGM4568，兼容电平范围宽，A口1.2V至5.5V的输入范围可以兼容市面上大部分通讯IC的电平和主控制器电平；根据两侧输出电平的不同，转换速率从70Mbps至100Mbps不等，可以实现大部分的中低速数据传输功能。