This 16-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 2.5V to 5.5V VCC operation.
The PCF8575 device provides general-purpose remote I/O expansion for most microcontroller families by way of the I2C interface [serial clock (SCL), serial data (SDA)].
The device 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 to VCC is active.
PART NUMBER | PACKAGE(1) | PACKAGE SIZE(2) |
---|---|---|
PCF8575 | SSOP (DB, 24) | 8.2mm × 7.8mm |
SSOP (DBQ, 24) | 8.65mm × 6mm | |
TVSOP (DGV, 24) | 5mm × 6.4mm | |
SOIC (DW, 24) | 15.5mm × 10.3mm | |
TSSOP (PW, 24) | 7.8mm × 6.4mm | |
VQFN (RGV, 24) | 4mm × 4mm |
PIN | TYPE | DESCRIPTION | ||
---|---|---|---|---|
NAME | DB, DBQ, DGV, DW, AND PW | RGE | ||
A0 | 21 | 18 | I | Address input 0. Connect directly to VCC or ground. Pull-up resistors are not needed. |
A1 | 2 | 23 | I | Address input 1. Connect directly to VCC or ground. Pull-up resistors are not needed. |
A2 | 3 | 24 | I | Address input 2. Connect directly to VCC or ground. Pull-up resistors are not needed. |
INT | 1 | 22 | O | Interrupt output. Connect to VCC through a pull-up resistor. |
P00 | 4 | 1 | I/O | P-port input/output. Push-pull design structure. |
P01 | 5 | 2 | I/O | P-port input/output. Push-pull design structure. |
P02 | 6 | 3 | I/O | P-port input/output. Push-pull design structure. |
P03 | 7 | 4 | I/O | P-port input/output. Push-pull design structure. |
P04 | 8 | 5 | I/O | P-port input/output. Push-pull design structure. |
P05 | 9 | 6 | I/O | P-port input/output. Push-pull design structure. |
P06 | 10 | 7 | I/O | P-port input/output. Push-pull design structure. |
P07 | 11 | 8 | I/O | P-port input/output. Push-pull design structure. |
GND | 12 | 9 | — | Ground |
P10 | 13 | 10 | I/O | P-port input/output. Push-pull design structure. |
P11 | 14 | 11 | I/O | P-port input/output. Push-pull design structure. |
P12 | 15 | 12 | I/O | P-port input/output. Push-pull design structure. |
P13 | 16 | 13 | I/O | P-port input/output. Push-pull design structure. |
P14 | 17 | 14 | I/O | P-port input/output. Push-pull design structure. |
P15 | 18 | 15 | I/O | P-port input/output. Push-pull design structure. |
P16 | 19 | 16 | I/O | P-port input/output. Push-pull design structure. |
P17 | 20 | 17 | I/O | P-port input/output. Push-pull design structure. |
SCL | 22 | 19 | I | Serial clock line. Connect to VCC through a pull-up resistor |
SDA | 23 | 20 | I/O | Serial data line. Connect to VCC through a pull-up resistor. |
VCC | 24 | 21 | — | Supply voltage |
MIN | MAX | UNIT | |||
---|---|---|---|---|---|
VCC | Supply voltage range | –0.5 | 6.5 | V | |
VI | Input voltage range (2) | –0.5 | VCC + 0.5 | V | |
VO | Output voltage range (2) | –0.5 | VCC + 0.5 | V | |
IIK | Input clamp current | VI < 0 | –20 | mA | |
IOK | Output clamp current | VO < 0 | –20 | mA | |
IOK | Input/output clamp current | VO < 0 or VO > VCC | –20 | mA | |
IOL | Continuous output low current | VO = 0 to VCC | 50 | mA | |
IOH | Continuous output high current | VO = 0 to VCC | –4 | mA | |
Continuous current through VCC or GND | ±100 | mA | |||
Tstg | Storage temperature range | 150 | °C |
VALUE | UNIT | ||||
---|---|---|---|---|---|
V(ESD) | Electrostatic discharge | Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins | 2000 | V | |
Charged device model (CDM), per JEDEC specification JESD22-C101, all pins | 1000 |
MIN | MAX | UNIT | |||
---|---|---|---|---|---|
VCC | Supply voltage | 2.5 | 5.5 | V | |
VIH | High-level input voltage | 0.7 × VCC | VCC + 0.5 | V | |
VIL | Low-level input voltage | –0.5 | 0.3 × VCC | V | |
IOH | P-port high-level output current | –1 | mA | ||
IOHT | P-port transient pullup current | –10 | mA | ||
IOL | P-port low-level output current | 25 | mA | ||
TA | Operating free-air temperature | –40 | 85 | °C |
THERMAL METRIC (1) | PCF8575 | UNIT | |||||||
---|---|---|---|---|---|---|---|---|---|
DB | DBQ | DGV | DW | PW | RGE | ||||
24 PINS | |||||||||
RθJA | Junction-to-ambient thermal resistance | 87.8 | 61 | 86 | 75.6 | 99.7 | 53.6 | °C/W | |
RθJC(top) | Junction-to-case (top) thermal resistance | 51.9 | 47.9 | 42.5 | 50.8 | °C/W | |||
RθJB | Junction-to-board thermal resistance | 56.8 | 50.1 | 66.1 | 31.5 | °C/W | |||
ΨJT | Junction-to-top characterization parameter | 14.3 | 21.1 | 2.7 | 3.4 | °C/W | |||
ΨJB | Junction-to-board characterization parameter | 56.2 | 49.7 | 65.5 | 31.4 | °C/W | |||
RθJC(bot) | Junction-to-case (bottom) thermal resistance | - | - | - | 14.8 | °C/W |