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PCF8574ADWE4 Datasheet(PDF) 1 Page - Texas Instruments |
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PCF8574ADWE4 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 21 page  www.ti.com FEATURES 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) 1 20 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 PCF8574A REMOTE 8-BIT I/O EXPANDER FOR I2C BUS SCPS069D – JULY 2001 – REVISED OCTOBER 2005 • Low Standby-Current Consumption of • Compatible With Most Microcontrollers 10 µA Max • Latched Outputs With High-Current Drive • I2C to Parallel-Port Expander Capability for Directly Driving LEDs • Open-Drain Interrupt Output • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II 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 PCF8574A 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(1) ORDERABLE PART NUMBER TOP-SIDE MARKING QFN – RGY Tape and reel PCF8574ARGYR PF574A PDIP – N Tube PCF8574AN PCF8574AN Tube PCF8574ADW –40 °C to 85°C SOIC – DW PCF8574A Tape and reel PCF8574ADWR TSSOP – PW Tape and reel PCF8574APWR PF574A TVSOP – DGV Tape and reel PCF8574ADGVR PF574A (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 © 2001–2005, 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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