PCF8575DBQ

Product Summary

The PCF8575DBQ is a remote 16-BIT I2C and SMBus I/O expander. The PCF8575DBQ provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface serial clock (SCL) and serial data (SDA). The PCF8575DBQ features a 16-bit quasi-bidirectional input/output (I/O) port (P07–P00, P17–P10), 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 (IOH) to VCC is active. An additional strong pullup to VCC (IOHT) allows fast-rising edges into heavily loaded outputs. The PCF8575DBQ 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.

Parametrics

PCF8575DBQ absolute maximum ratings: (1)Supply voltage range, VCC: -0.5 to 6.5 V; (2)Input voltage range, VI: -0.5 VCC + 0.5 V; (3)Output voltage range, VO: –0.5 VCC + 0.5 V; (4)Input clamp current, VI < 0 ,IIK: -20 mA; (5)Output clamp current, VO < 0, IOK: -20 mA; (6)Input/output clamp current, VO < 0 or VO > VCC, IOK: -20 mA; (7)Continuous output low current, VO = 0 to VCC, IOL: 50 mA; (8)Continuous output high current, VO = 0 to VCC, IOH: -4 mA; (9)Continuous current through VCC or GND: ±100 mA; (10)Package thermal impedance, DB package, θJA: 63℃/W; DBQ package, θJA: 61℃/W; DGV package, θJA: 86℃/W; DW package, θJA: 46℃/W; PW package, θJA: 88℃/W; RGE package, θJA: 53℃/W; RHL package, θJA: 43℃/W; (11)Storage temperature range, Tstg: -65 to 150℃.

Features

PCF8575DBQ features: (1)Low Standby-Current Consumption of 10 mA Max; (2)Current Source to VCC for Actively Driving a High at the Output; (3)I2C to Parallel-Port Expander; (4)Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II; (5)Open-Drain Interrupt Output; (6)Compatible With Most Microcontrollers; (7)ESD Protection Exceeds JESD 22, 2000-V Human-Body Model (A114-A); 200-V Machine Model (A115-A); 1000-V Charged-Device Model (C101); (8)400-kHz Fast I2C Bus; (9)Address by Three Hardware Address Pins for Use of up to Eight Devices; (10)Latched Outputs With High-Current Drive Capability for Directly Driving LEDs.

Diagrams