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PCF8574APWR Datasheet(PDF) 1 Page - Texas Instruments |
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PCF8574APWR Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 16 page  PCF8574 REMOTE 8BIT I/O EXPANDER FOR I2C BUS SCPS068C - JULY 2001 − REVISED JANUARY 2004 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Low Standby-Current Consumption of 10 µA Maximum D I2C to Parallel-Port Expander D Open-Drain Interrupt Output D Compatible With Most Microcontrollers D Latched Outputs With High-Current Drive Capability for Directly Driving LEDs D Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 A0 A1 A2 P0 P1 P2 P3 GND VCC SDA SCL INT P7 P6 P5 P4 DW OR N PACKAGE (TOP VIEW) 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 INT SCL NC SDA VCC A0 A1 NC A2 P0 P7 P6 NC P5 P4 GND P3 NC P2 P1 DGV OR PW PACKAGE (TOP VIEW) NC − No internal connection RGY PACKAGE (TOP VIEW) 120 10 11 2 3 4 5 6 7 8 9 19 18 17 16 15 14 13 12 P6 NC P5 P4 GND P3 NC P2 SCL NC SDA VCC A0 A1 NC A2 NC − No internal connection description/ordering information This 8-bit input/output (I/O) expander for the two-line bidirectional bus (I2C) is designed for 2.5-V to 6-V VCC operation. The PCF8574 provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL), serial data (SDA)]. The device features an 8-bit quasi-bidirectional I/O port (P0−P7), including latched outputs with high-current drive capability for directly driving LEDs. Each quasi-bidirectional I/O can be used as an input or output without the use of a data-direction control signal. At power on, the I/Os are high. In this mode, only a current source to VCC is active. An additional strong pullup to VCC allows fast rising edges into heavily loaded outputs. This device turns on when an output is written high and is switched off by the negative edge of SCL. The I/Os should be high before being used as inputs. ORDERING INFORMATION TA PACKAGE† ORDERABLE PART NUMBER TOP-SIDE MARKING QFN − RGY Tape and reel PCF8574RGYR PF574 PDIP − N Tube PCF8574N PCF8574N −40 °C to 85°C SOIC − DW Tube PCF8574DW PCF8574 −40 °C to 85°C SOIC − DW Tape and reel PCF8574DWR PCF8574 TSSOP − PW Tape and reel PCF8574PWR PF574 TVSOP − DGV Tape and reel PCF8574DGVR PF574 † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. Copyright 2004, Texas Instruments Incorporated 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. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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