PCA9509: 电平转换I²C总线/SMBus中继器
PCA9509是一款电平转换I²C总线/SMBus中继器，它允许处理器低压双线式串行总线连接标准I²C总线或SMBus I/O。在电平转换过程中保留I²C总线系统的所有操作模式和特性的同时，它还允许延伸I²C总线，方法是为数据(SDA)和时钟(SCL)线路提供双向缓冲，从而使能较高电压侧的I²C总线或SMBus最大电容400 pF。端口A允许的电压范围为1.35 V至VCC(B) ‑ 1.0 V，由于其内部具有电流源，因此无需外部上拉电阻。端口B允许的电压范围为3.0 V至5.5 V并且可耐受过压。当PCA9509未上电时，端口A和端口B上的SDA和SCL引脚为高阻抗。
对于其端口A VCC(A)少于1.35 V或端口 B VCC(B)少于3.0 V的应用，请使用简易替代产品PCA9509A。
当端口A使用电流感应机制来检测输入或输出低电平信号（防止总线锁存）时，总线端口B驱动器符合SMBus I/O电平。端口A使用1 mA上拉电流源和200 Ω下拉驱动器。这导致端口A上为低电平，从而适合于较小的电压摆幅。将内部缓冲器的输入阈值设为约比电平输出电压阈值低50 mV时，端口A上的低电平内部缓冲器输出下拉电压设为约0.2 V。当从内部将端口A I/O驱动至低电平时，输入不会将低电平识别为低电平。这可防止发生锁存情况。端口B上的输出下拉电阻驱动硬低压且输入电平将被设为SMBus或I²C总线电压电平的0.3，这将使端口B连接至任何其他I²C总线器件或缓冲器。
在VCC(A)高于0.8 V且VCC(B)高于2.5 V之前，PCA9509驱动器不会使能。使能(EN)引脚还可用于在系统控制下打开和关闭驱动器。请注意，仅当总线空闲时才会更改EN引脚的状态。
0 Hz至400 kHz时钟频率 备注：由于中继器增加的延迟，最大系统工作频率可能少于400 kHz。 | PCA9509: 产品结构框图 Outline 3d SOT505-1 |
数据手册 (1)
| 名称/描述 | Modified Date |
|---|---|
| Level translating I2C-bus/SMBus repeater (REV 7.0) PDF (302.0 kB) PCA9509 [English] | 04 Nov 2014 |
应用说明 (3)
| 名称/描述 | Modified Date |
|---|---|
| PCA9500/PCA9501 provides simple card maintenance and control using I²C-bus (REV 1.0) PDF (90.0 kB) AN256 [English] | 23 Mar 2009 |
| Level shifting techniques in I2C-bus design (REV 1.0) PDF (52.0 kB) AN10441 [English] | 20 Jun 2007 |
| I2C / SMBus Repeaters, Hubs and Expanders (REV 2.0) PDF (1.0 MB) AN255 [English] | 19 Dec 2002 |
用户指南 (4)
| 名称/描述 | Modified Date |
|---|---|
| I2C-bus specification and user manual (REV 6.0) PDF (1.4 MB) UM10204 [English] | 28 Apr 2014 |
| I2C-bus specification and user manual (REV 5.0) PDF (1.6 MB) UM10204_JA [English] | 03 Apr 2013 |
| PCA9600 demonstration board OM6293 (REV 1.0) PDF (130.0 kB) UM10323 [English] | 15 Dec 2008 |
| I2C Demonstration Board 2005-1 Quick Start Guide (REV 1.0) PDF (261.0 kB) UM10206 [English] | 13 Jun 2006 |
手册 (2)
| 名称/描述 | Modified Date |
|---|---|
| NXP® I2C-bus solutions 2014: Smart, simple solutions for the 12 most common design concerns (REV 1.0) PDF (3.5 MB) 75017540 [English] | 01 Aug 2014 |
| Extend the I2C-bus with advanced repeaters and hubs; NXP® 2-channel I2C-bus repeaters PCA9515x and... (REV 1.0) PDF (740.0 kB) 75016532 [English] | 01 Jul 2008 |
封装信息 (3)
| 名称/描述 | Modified Date |
|---|---|
| plastic thin shrink small outline package; 8 leads; body width 3 mm (REV 1.0) PDF (240.0 kB) SOT505-1 [English] | 08 Feb 2016 |
| plastic extremely thin quad flat package; no leads; 8 terminals; UTLP based; body 1.6 x 1.6 x 0.5 mm (REV 1.0) PDF (196.0 kB) SOT902-1 [English] | 08 Feb 2016 |
| plastic small outline package; 8 leads; body width 3.9 mm (REV 1.0) PDF (244.0 kB) SOT96-1 [English] | 08 Feb 2016 |
包装 (3)
| 名称/描述 | Modified Date |
|---|---|
| XQFN8(U); Reel pack, reverse; SMD, 7" Q3/T4 Standard product orientation Orderable part number ending ,125 or... (REV 5.0) PDF (201.0 kB) SOT902-1_125 [English] | 02 May 2013 |
| SO8; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering... (REV 2.0) PDF (232.0 kB) SOT96-1_118 [English] | 19 Apr 2013 |
| TSSOP8; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... (REV 1.0) PDF (214.0 kB) SOT505-1_118 [English] | 15 Apr 2013 |
支持信息 (4)
| 名称/描述 | Modified Date |
|---|---|
| Reflow Soldering Profile (REV 1.0) PDF (34.0 kB) REFLOW_SOLDERING_PROFILE [English] | 30 Sep 2013 |
| Wave Soldering Profile (REV 1.0) PDF (20.0 kB) WAVE_SOLDERING_PROFILE [English] | 30 Sep 2013 |
| Footprint for reflow soldering (REV 1.0) PDF (9.0 kB) SO-SOJ-REFLOW [English] | 08 Oct 2009 |
| Footprint for wave soldering (REV 1.0) PDF (8.0 kB) SO-SOJ-WAVE [English] | 08 Oct 2009 |
订购信息
| 型号 | 状态 | Package version | Operating Temperature (Cel) | I2C-bus (kHz) | Operating voltage (VDC) | Operating voltage 2 (V) | Inputs | Outputs |
|---|---|---|---|---|---|---|---|---|
| PCA9509DP | Active | SOT505-1 | -40~85 | 400 | 2.7~3.6_tolerant_to_5.5 VDC | 0.9~5.5 | 1 | 1 |
| PCA9509D | Active | SOT96-1 | -40~85 | 400 | 2.7~3.6_tolerant_to_5.5 VDC | 0.9~5.5 | 1 | 1 |
| PCA9509GM | Active | SOT902-1 | -40~85 | 400 | 2.7~3.6_tolerant_to_5.5 VDC | 0.9~5.5 | 1 | 1 |
封装环保信息
| 产品编号 | 封装说明 | Outline Version | 回流/波峰焊接 | 包装 | 产品状态 | 部件编号订购码 (12NC) | Marking | 化学成分 | RoHS / 无铅 / RHF | 无铅转换日期 | EFR | IFR(FIT) | MTBF（小时） | MSL | MSL LF |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PCA9509GM |  | SOT902-1 | Reel 7" Q3/T4, Reverse | Active | PCA9509GM,125 (9352 841 39125) | Standard Marking | PCA9509GM |    | Always Pb-free | 0.0 | 2.0 | 5E8 | 1 | 1 | |
| PCA9509D |  | SOT96-1 | SO-SOJ-REFLOW
SO-SOJ-WAVE SO-SOJ-REFLOW SO-SOJ-WAVE | Reel 13" Q1/T1 | Active | PCA9509D,118 (9352 822 27118) | PCA9509 | PCA9509D | | Always Pb-free | 0.0 | 2.0 | 5E8 | 1 | 1 |
| Bulk Pack | Active | PCA9509D,112 (9352 822 27112) | PCA9509 | PCA9509D | | Always Pb-free | 0.0 | 2.0 | 5E8 | 1 | 1 | ||||
| PCA9509DP | | SOT505-1 | Reflow_Soldering_Profile | Reel 13" Q1/T1 | Active | PCA9509DP,118 (9352 822 26118) | 9509 | PCA9509DP | | Always Pb-free | 0.0 | 2.0 | 5E8 | 1 | 1 |
| PCA9509DP/DG | | SOT505-1 | Reflow_Soldering_Profile | Reel 13" Q1/T1 | Withdrawn | PCA9509DP/DG,118 (9352 934 08118) | 9509 | | Always Pb-free | 0.0 | 2.0 | 5E8 | 1 | 1 |
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- Reflow_Soldering_Profile Wave_Soldering_Profile LPC1112FD20
- plastic extremely thin quad flat package; no leads; 8 terminals; UTLP based; body 1.6 x 1.6 x 0.5 mm pca9509gm
- XQFN8(U); Reel pack, reverse; SMD, 7" Q3/T4 Standard product orientation Orderable part number ending ,125 or... pca9509gm
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- TSSOP8; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... pesd5v0l7bas
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