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PCA9544ADW Datasheet(PDF) 1 Page - Texas Instruments |
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PCA9544ADW Datasheet(HTML) 1 Page - Texas Instruments |
1 / 23 page www.ti.com FEATURES DESCRIPTION/ORDERING INFORMATION PCA9544A 4-CHANNEL I2C AND SMBus MULTIPLEXER WITH INTERRUPT LOGIC SCPS146A – OCTOBER 2005 – REVISED OCTOBER 2005 • 1-of-4 Bidirectional Translating Switches • No Glitch on Power Up • I2C Bus and SMBus Compatible • Supports Hot Insertion • Four Active-Low Interrupt Inputs • Low Standby Current • Active-Low Interrupt Output • Operating Power-Supply Voltage Range of 2.3 V to 5.5 V • Three Address Pins, Allowing up to Eight Devices on the I2C Bus • 5.5-V Tolerant Inputs • Channel Selection Via I2C Bus • 0 to 400-kHz Clock Frequency • Power Up With All Switch Channels • Latch-Up Performance Exceeds 100 mA Per Deselected JESD 78 • Low R ON Switches • ESD Protection Exceeds JESD 22 • Allows Voltage-Level Translation Between – 2000-V Human-Body Model (A114-A) 1.8-V, 2.5-V, 3.3-V, and 5-V Buses – 200-V Machine Model (A115-A) – 1000-V Charged-Device Model (C101) The PCA9544A is a quad bidirectional translating switch controlled via the I2C bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels. One SCL/SDA pair can be selected at a time, and this is determined by the contents of the programmable control register. Four interrupt inputs (INT3–INT0), one for each of the downstream pairs, are provided. One interrupt output (INT) acts as an AND of the four interrupt inputs. A power-on reset function puts the registers in their default state and initializes the I2C state machine, with no channel selected. The pass gates of the switches are constructed such that the VCC pin can be used to limit the maximum high voltage, which will be passed by the PCA9544A. This allows the use of different bus voltages on each pair, so that 1.8-V, 2.5-V, or 3.3-V parts can communicate with 5-V parts, without any additional protection. External pullup resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 5-V tolerant. ORDERING INFORMATION TA PACKAGE(1) ORDERABLE PART NUMBER TOP-SIDE MARKING QFN – RGW Reel of 3000 PCA9544ARGWR PREVIEW QFN – RGY Reel of 1000 PCA9544ARGYR PD544A Tube of 25 PCA9544ADW PCA9544A SOIC – DW Reel of 2000 PCA9544ADWR Reel of 250 PCA9544ADWT PREVIEW Tube of 70 PCA9544APW –40 °C to 85°C TSSOP – PW Reel of 2000 PCA9544APWR PD544A Reel of 250 PCA9544APWT Reel of 2000 PCA9544ADGVR PD544A TVSOP – DGV Reel of 250 PCA9544ADGVT PREVIEW VFBGA – GQN Reel of 1000 PCA9544AGQNR PD544A VFBGA – ZQN (Pb-free) Reel of 1000 PCA9544AZQNR PD544A (1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 2005, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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