PCA9545B NXP [NXP Semiconductors], PCA9545B Datasheet
PCA9545B
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PCA9545B Summary of contents
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... V parts without any additional protection. External pull-up resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 5 V tolerant. The PCA9545A, PCA9545B and PCA9545C are identical except for the fixed portion of the slave address. ...
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... Table 1. Type number PCA9545ABS PCA9545AD PCA9545APW PCA9545BPW PCA9545CPW 3.1 Ordering options Table 2. Type number PCA9545ABS PCA9545AD PCA9545APW PCA9545BPW PCA9545CPW PCA9545A_45B_45C_7 Product data sheet 4-channel I Ordering information Package Name Description HVQFN20 plastic thermal enhanced very thin quad flat package; no leads; 20 terminals; body 5 SO20 plastic small outline package ...
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... SD3 RESET SCL SDA INT0 to INT3 Fig 1. PCA9545A_45B_45C_7 Product data sheet 4-channel I PCA9545A/PCA9545B/PCA9545C SWITCH CONTROL LOGIC POWER-ON RESET INPUT FILTER Block diagram of PCA9545A/45B/45C Rev. 07 — 19 June 2009 PCA9545A/45B/45C 2 C-bus switch with interrupt logic and reset 2 I C-BUS CONTROL INTERRUPT LOGIC © ...
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... Pin configuration for HVQFN20 (transparent top view) Rev. 07 — 19 June 2009 PCA9545A/45B/45C 2 C-bus switch with interrupt logic and reset RESET 3 4 INT0 PCA9545APW 5 SD0 PCA9545BPW SC0 6 PCA9545CPW INT1 7 8 SD1 SC1 Fig 3. Pin configuration for TSSOP20 15 ...
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NXP Semiconductors 5.2 Pin description Table 3. Symbol A0 A1 RESET INT0 SD0 SC0 INT1 SD1 SC1 V SS INT2 SD2 SC2 INT3 SD3 SC3 INT SCL SDA V DD [1] HVQFN20 package die supply ground is connected to both ...
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... The last bit of the slave address defines the operation to be performed. When set to logic 1, a read is selected while a logic 0 selects a write operation. The PCA9545BPW and PCA9545CPW are alternate address versions if needed for larger systems or to resolve conflicts. The data sheet will reference the PCA9545A, but the PCA9545B and PCA9545C function identically except for the slave address ...
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NXP Semiconductors 6.2 Control register Following the successful acknowledgement of the slave address, the bus master will send a byte to the PCA9545A/45B/45C, which will be stored in the control register. If multiple bytes are received by the PCA9545A/45B/45C, it ...
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NXP Semiconductors 6.2.2 Interrupt handling The PCA9545A/45B/45C provides 4 interrupt inputs, one for each channel, and one open-drain interrupt output. When an interrupt is generated by any device, it will be detected by the PCA9545A/45B/45C and the interrupt output will ...
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NXP Semiconductors 6.4 Power-on reset When power is applied to V PCA9545A/45B/45C in a reset condition until V reset condition is released and the PCA9545A/45B/45C registers and I machine are initialized to their default states (all zeroes) causing all the ...
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NXP Semiconductors 7. Characteristics of the I 2 The I C-bus is for 2-way, 2-line communication between different ICs or modules. The two lines are a serial data line (SDA) and a serial clock line (SCL). Both lines must be ...
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NXP Semiconductors 7.3 System configuration A device generating a message is a ‘transmitter’, a device receiving is the ‘receiver’. The device that controls the message is the ‘master’ and the devices which are controlled by the master are the ‘slaves’ ...
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NXP Semiconductors 7.5 Bus transactions Data is transmitted to the PCA9545A/45B/45C control register using the Write mode as shown in SDA START condition Fig 14. Write control register Data is read from PCA9545A/45B/45C using the Read mode as shown in ...
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NXP Semiconductors 8. Application design-in information 2 I C-bus/SMBus master (1) If the device generating the interrupt has an open-drain output structure or can be 3-stated, a Fig 16. Typical application PCA9545A_45B_45C_7 Product data sheet 4-channel 2.7 ...
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NXP Semiconductors 9. Limiting values Table 6. In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to V (ground = 0 V). SS Symbol ...
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NXP Semiconductors 10. Static characteristics Table 7. Static characteristics +85 C; unless otherwise specified. See SS amb Symbol Parameter Supply V supply voltage DD I supply current DD I ...
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NXP Semiconductors Table 8. Static characteristics +85 C; unless otherwise specified. See SS amb Symbol Parameter Supply V supply voltage DD I supply current DD I standby current stb ...
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NXP Semiconductors 11. Dynamic characteristics Table 9. Dynamic characteristics Symbol Parameter t propagation delay PD f SCL clock frequency SCL t bus free time between a STOP and BUF START condition t hold time (repeated) START condition HD;STA t LOW ...
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NXP Semiconductors SDA t BUF t LOW SCL t HD;STA P S Fig 17. Definition of timing on the I SCL SDA RESET 50 % Fig 18. Definition of RESET timing START protocol condition (S) t SU;STA SCL t BUF ...
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NXP Semiconductors Fig 20. Expanded view of read input port register 12. Test information Fig 21. Test circuitry for switching times PCA9545A_45B_45C_7 Product data sheet 4-channel I SCL 2 1 SDA INPUT t v(INTnN INTN) INT V PULSE GENERATOR Definitions ...
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NXP Semiconductors 13. Package outline SO20: plastic small outline package; 20 leads; body width 7 pin 1 index 1 e DIMENSIONS (inch dimensions are derived from the original mm dimensions) A UNIT ...
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NXP Semiconductors TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4 pin 1 index 1 DIMENSIONS (mm are the original dimensions) A UNIT max. 0.15 0.95 mm ...
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NXP Semiconductors HVQFN20: plastic thermal enhanced very thin quad flat package; no leads; 20 terminals; body 0.85 mm terminal 1 index area terminal 1 20 index area DIMENSIONS (mm are ...
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NXP Semiconductors 14. Soldering of SMD packages This text provides a very brief insight into a complex technology. A more in-depth account of soldering ICs can be found in Application Note AN10365 “Surface mount reflow soldering description” . 14.1 Introduction ...
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NXP Semiconductors 14.4 Reflow soldering Key characteristics in reflow soldering are: • Lead-free versus SnPb soldering; note that a lead-free reflow process usually leads to higher minimum peak temperatures (see reducing the process window • Solder paste printing issues including ...
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NXP Semiconductors Fig 25. Temperature profiles for large and small components For further information on temperature profiles, refer to Application Note AN10365 “Surface mount reflow soldering description” . 15. Abbreviations Table 12. Acronym CDM DUT ESD HBM ...
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NXP Semiconductors 16. Revision history Table 13. Revision history Document ID Release date PCA9545A_45B_45C_7 20090619 • Modifications: Table 9 “Dynamic – Symbol t – Symbol C • Updated soldering information. PCA9545A_45B_45C_6 20070319 PCA9545A_45B_45C_5 20061017 PCA9545A_4 20060925 PCA9545A_3 20050303 (9397 750 ...
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NXP Semiconductors 17. Legal information 17.1 Data sheet status [1][2] Document status Product status Objective [short] data sheet Development Preliminary [short] data sheet Qualification Product [short] data sheet Production [1] Please consult the most recently issued document before initiating or ...
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NXP Semiconductors 19. Contents 1 General description . . . . . . . . . . . . . . . . . . . . . . 1 2 Features . . . . . . . . ...