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PCA9544ARGYR Datasheet(PDF) 1 Page - Texas Instruments |
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PCA9544ARGYR Datasheet(HTML) 1 Page - Texas Instruments |
1 / 35 page PCA9544A Slaves A , A ...A 0 1 N Slaves B , B ...B 0 1 N I2C or SMBus Master (e.g. µProcessor) SDA SCL INT SD0 SC0 INT0 Channel 0 Channel 1 SD1 SC1 INT1 V CC A0 A1 GND A2 Slaves B , B ...B 0 1 N Channel 2 SD2 SC2 INT2 Slaves B , B ...B 0 1 N Channel 3 SD3 SC3 INT3 Product Folder Sample & Buy Technical Documents Tools & Software Support & Community PCA9544A SCPS146E – OCTOBER 2005 – REVISED JUNE 2014 PCA9544A Low Voltage 4-Channel I2C and SMBus Multiplexer With Interrupt Logic 1 Features 2 Applications 1 • 1-of-4 Bidirectional Translating Switches • Servers • I2C Bus and SMBus Compatible • Routers (Telecom Switching Equipment) • Four Active-Low Interrupt Inputs • Factory Automation • Active-Low Interrupt Output • Products With I2C Slave Address Conflicts (For Example, Multiple, Identical Temp Sensors) • Three Address Pins, Allowing up to Eight Devices on the I2C Bus 3 Description • Channel Selection Via I2C Bus The PCA9544A is a quad bidirectional translating • Power Up With All Switch Channels Deselected switch controlled via the I2C bus. The SCL/SDA • Low RON Switches upstream pair fans out to four downstream pairs, or channels. One SCL/SDA pair can be selected at a • Allows Voltage-Level Translation Between 1.8-V, time, and this is determined by the contents of the 2.5-V, 3.3-V, and 5-V Buses programmable control register. Four interrupt inputs • No Glitch on Power Up (INT3–INT0), one for each of the downstream pairs, • Supports Hot Insertion are provided. One interrupt output (INT) acts as an AND of the four interrupt inputs. • Low Standby Current • Operating Power-Supply Voltage Range of A power-on reset function puts the registers in their 2.3 V to 5.5 V default state and initializes the I2C state machine, with no channel selected. • 5.5-V Tolerant Inputs • 0 to 400-kHz Clock Frequency The pass gates of the switches are constructed such that the VCC pin can be used to limit the maximum • Latch-Up Performance Exceeds 100 mA Per high voltage, which will be passed by the PCA9544A. JESD 78 This allows the use of different bus voltages on each • ESD Protection Exceeds JESD 22 pair, so that 1.8-V, 2.5-V, or 3.3-V parts can – 2000-V Human-Body Model (A114-A) communicate with 5-V parts, without any additional protection. External pull-up resistors pull the bus up – 200-V Machine Model (A115-A) to the desired voltage level for each channel. All I/O – 1000-V Charged-Device Model (C101) pins are 5-V tolerant. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) PCA9544A TSSOP (20) 6.50 mm × 4.40 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. 4 Simplified Application Diagram 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
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