PCA9517A: 电平变换I²C总线转发器
PCA9517A是一款CMOS集成电路，提供低电压（低至0.9 V）和更高电压（2.7 V至5.5 V）I²C总线或SMBus应用之间的电平切换。在电平切换过程中保留I²C总线系统所有工作模式和功能的同时，它还允许通过为数据(SDA)和时钟(SCL)线路提供双向缓冲以允许扩展I²C总线，从而可使用两条400 pF的总线。使用PCA9517A能使系统设计师将总线电压和电容隔离成两半。SDA和SCL引脚为耐过压且在PCA9517A未通电时为高阻抗。
2.7 V至5.5 V总线端口B动器的性能类似PCA9515A器件上的驱动器，而可调节电压总线端口A驱动更多电流且消除静态偏移电压。这使端口B的低电平变换成端口A几乎0 V的低电平，适应更低电压逻辑的小电压摆幅。
端口B PCA9517A I/O驱动器的静态偏移设计防止其连接至具有上升时间加速器的另一器件，包括PCA9510、PCA9511、PCA9512、PCA9513、PCA9514、PCA9515A、PCA9516A、PCA9517A（端口B）或PCA9518。但是，可一起连接两个或多个PCA9517A的端口A，以允许端口A在共用总线上的星形拓扑，且端口A可直接连接至带有静态或动态偏移电压的任何其他缓冲器。可按端口A至端口B串联多个PCA9517A，不会积聚偏移电压，只需考虑渡越时间延迟。
除非VCC(A)高于0.8 V且VCC(B)高于2.5 V，否则不会启用PCA9517A驱动器。也可使用EN引脚在系统控制下打开和关闭驱动器。应该注意，当总线闲置时仅改变使能引脚的状态。
端口B内部缓冲器的输出下拉低电平设为大约0.5 V，而内部缓冲器的输入阈值设为大约70 mV以下(0.43 V)。当端口B I/O内部驱动为低电平时，输入端不会将低电平识别为低电平。这能防止发生锁定状况。端口A的输出下拉会驱动一个真正的低电平且输入电平设为0.3VCC(A)以适应系统中更低低电平的需求，其中低电压侧供电电压低至0.9 V。
参数
PCA9517[1]
PCA9517A[2]
静电放电，HBM
> 2 kV
> 5.5 kV
[1] PCA9517将在若干年后停产，所以请为所有新设计和系统更新选择PCA9517A。
[2] PCA9517A是PCA9517经过改进的热插拔和ESD版本，虽然工作上完全相同，但为了所有新设计和系统更新应选择前者。
PCA9517A: 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 repeater (REV 4.1) PDF (378.0 kB) PCA9517A [English] | 24 May 2016 |
应用说明 (2)
| 名称/描述 | Modified Date |
|---|---|
| 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 (3)
| 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 |
| I2C/SMBus buffers for backplane multi-point and hot-swap applications; NXP® Level-shifting and... (REV 1.0) PDF (773.0 kB) 75016530 [English] | 01 Jul 2008 |
| 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 |
|---|---|
| HWSON8: plastic thermal enhanced very very thin small outline package, no leads; 8 terminals; (REV 1.1) PDF (190.0 kB) SOT1069-2 [English] | 10 Jun 2016 |
| 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 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 |
|---|---|
| HWSON8; Reel pack, SMD, 7" Q2/T3 Turned 90 degree product orientation Orderable part number ending, 147 or... (REV 1.0) PDF (196.0 kB) SOT1069-2_147 [English] | 06 May 2014 |
| 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 |
IBIS
- PCA9517A IBIS model (REV 1.0) ibs PCA9517A_1 6/12/2015
- PCA9517ADP IBIS model (REV 2.0) ibs PCA9517ADP 6/2/2015
订购信息
| 型号 | 状态 |
|---|---|
| PCA9517ATP | Active |
| PCA9517ADP | Active |
| PCA9517AD | Active |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PCA9517ATP |  | SOT1069-2 | Reel 7" Q2/T3 | Active | PCA9517ATP,147 (9352 977 14147) | 17A | PCA9517ATP |    | Always Pb-free | 0.0 | 2.0 | 5E8 | 1 | 1 | |
| PCA9517AD |  | SOT96-1 | SO-SOJ-REFLOW
SO-SOJ-WAVE SO-SOJ-REFLOW SO-SOJ-WAVE | Reel 13" Q1/T1 | Active | PCA9517AD,118 (9352 857 63118) | PA9517A | PCA9517AD | | Always Pb-free | 0.0 | 2.0 | 5E8 | 1 | 1 |
| Bulk Pack | Active | PCA9517AD,112 (9352 857 63112) | PA9517A | PCA9517AD | | Always Pb-free | 0.0 | 2.0 | 5E8 | 1 | 1 | ||||
| PCA9517ADP | | SOT505-1 | Reflow_Soldering_Profile | Reel 13" Q1/T1 | Active | PCA9517ADP,118 (9352 857 64118) | 9517A | PCA9517ADP | | Always Pb-free | 0.0 | 2.0 | 5E8 | 1 | 1 |
| PCA9517ADP/DG | | SOT505-1 | Reflow_Soldering_Profile | Reel 13" Q1/T1 | Withdrawn | PCA9517ADP/DG,118 (9352 869 38118) | 9517A | | Always Pb-free | 0.0 | 2.0 | 5E8 | 1 | 1 |
- Level translating I2C-bus repeater pca9517atp
- Level shifting techniques in I2C-bus design pca9685pw
- I2C / SMBus Repeaters, Hubs and Expanders pca9600
- I2C-bus specification and user manual pca9685pw
- I2C-bus specification and user manual pca9685pw
- PCA9600 demonstration board OM6293 pca9600
- I2C Demonstration Board 2005-1 Quick Start Guide pca9685pw
- NXP® I2C-bus solutions 2014: Smart, simple solutions for the 12 most common design concerns pca9685pw
- I2C/SMBus buffers for backplane multi-point and hot-swap applications; NXP® Level-shifting and... pca9518apw
- Extend the I2C-bus with advanced repeaters and hubs; NXP® 2-channel I2C-bus repeaters PCA9515x and... pca9600
- Reflow_Soldering_Profile Wave_Soldering_Profile LPC1112FD20
- PCA9517A IBIS model PCA9517AD
- PCA9517ADP IBIS model PCA9517ADP
- HWSON8: plastic thermal enhanced very very thin small outline package, no leads; 8 terminals; PCT2075TP
- HWSON8; Reel pack, SMD, 7" Q2/T3 Turned 90 degree product orientation Orderable part number ending, 147 or... PCT2075TP
- plastic small outline package; 8 leads; body width 3.9 mm CBT3306_Q100
- Footprint for reflow soldering NPIC6C596A_Q100
- Footprint for wave soldering NPIC6C596A_Q100
- SO8; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering... CBT3306_Q100
- plastic thin shrink small outline package; 8 leads; body width 3 mm pesd5v0l7bas
- Reflow_Soldering_Profile Wave_Soldering_Profile LPC1112FD20
- TSSOP8; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... pesd5v0l7bas
- PCA9517ADP
- PCT2075
- SA612A
- PCT2075
