PCF8574TS ,Remote 8-bit I/O expander for I2C-busGeneral descriptionThe PCF8574/74A provides general-purpose remote I/O expansion via the two-wire 2 ..
PCF8575CDW ,Remote 16-Bit I2C and SMBus I/O Expander with Interrupt Output 24-SOIC -40 to 85features a 16-bit quasi-bidirectional• Address by Three Hardware Address Pins for Useinput/output ( ..
PCF8575CRGER ,Remote 16-Bit I2C and SMBus I/O Expander with Interrupt Output 24-VQFN -40 to 85 SCPS123F–MARCH 2005–REVISED JANUARY 20155 Pin ConfigurationDB, DBQ, DGV, DW, OR PW PACKAGE RGE PAC ..
PCF8575CTS ,Remote 16-bit I/O expander for I2C-busFEATURES• Operating supply voltage from 4.5 to 5.5 V• Low standby current consumption of 10 μA maxi ..
PCF8575DBQR ,Remote 16-Bit I2C and SMBus I/O Expander with Interrupt Output 24-SSOP -40 to 85Features2• I C to Parallel-Port Expander 3 DescriptionThis 16-bit I/O expander for the two-line bid ..
PCF8575DBR ,Remote 16-Bit I2C and SMBus I/O Expander with Interrupt Output 24-SSOP -40 to 85 SCPS121F–JANUARY 2005–REVISED MAY 20156 Pin Configurations and Functions(TOPVIEW) (TOPVIEW)INTPin ..
PH965C6 ,SPECIFICATIONSPECIFICATIONFuji Electric Co.,Ltd.Matsumoto FactoryFu ji Electric Co.,Ltd. MS5D1444 1/12 ..
PH975C6 , Low-Loss Fast Recovery Diode
PH9930L , N-channel TrenchMOS logic level FET
PHB101NQ03LT ,TrenchMOS(tm) logic level FET
PHB101NQ03LT ,TrenchMOS(tm) logic level FET
PHB110NQ08T ,N-channel TrenchMOS standard level FETapplications Uninterruptible power supplies1.4 Quick reference data Table 1. Quick referenceSymbol ..
PCF8574ATS-PCF8574TS
Remote 8-bit I/O expander for I虏C鈥慴us with interrupt
1. General descriptionThe PCF8574/74A provides general-purpose remote I/O expansion via the two-wire
bidirectional I2 C-bus (serial clock (SCL), serial data (SDA)).
The devices consist of eight quasi-bidirectional ports, 100 kHz I2 C-bus interface, three
hardware address inputs and interrupt output operating between 2.5 V and 6 V. The
quasi-bidirectional port can be independently assigned as an input to monitor interrupt
status or keypads, or as an output to activate indicator devices such as LEDs. System
master can read from the input port or write to the output port through a single register.
The low current consumption of 2.5 A (typical, static) is great for mobile applications and
the latched output ports directly drive LEDs.
The PCF8574 and PCF8574A are identical, except for the different fixed portion of the
slave address. The three hardware address pins allow eight of each device to be on the
same I2 C-bus, so there can be up to 16 of these I/O expanders PCF8574/74A together on
the same I2 C-bus, supporting up to 128 I/Os (for example, 128 LEDs).
The active LOW open-drain interrupt output (INT) can be connected to the interrupt logic
of the microcontroller and is activated when any input state differs from its corresponding
input port register state. It is used to indicate to the microcontroller that an input state has
changed and the device needs to be interrogated without the microcontroller continuously
polling the input register via the I2 C-bus.
The internal Power-On Reset (POR) initializes the I/Os as inputs with a weak internal
pull-up 100 A current source.
2. Features and benefitsI2 C-bus to parallel port expander 100 kHz I2 C-bus interface (Standard-mode I2 C-bus) Operating supply voltage 2.5 V to 6 V with non-overvoltage tolerant I/O held to VDD
with 100 A current source 8-bit remote I/O pins that default to inputs at power-up Latched outputs directly drive LEDs Total package sink capability of 80 mA Active LOW open-drain interrupt output Eight programmable slave addresses using three address pins Low standby current (2.5 A typical) 40 C to +85 C operation ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per
JESD22-C101
PCF8574; PCF8574A
Remote 8-bit I/O expander for I2 C-bus with interrupt
Rev. 5 — 27 May 2013 Product data sheet
NXP Semiconductors PCF8574; PCF8574A
Remote 8-bit I/O expander for I2 C-bus with interrupt Latch-up testing is done to JEDEC standard JESD78 which exceeds 100 mA Packages offered: DIP16, SO16, SSOP20
3. Applications LED signs and displays Servers Key pads Industrial control Medical equipment PLC Cellular telephones Mobile devices Gaming machines Instrumentation and test measurement
4. Ordering information
4.1 Ordering options
Table 1. Ordering informationPCF8574P PCF8574P DIP16 plastic dual in-line package; 16 leads (300 mil) SOT38-4
PCF8574AP PCF8574AP
PCF8574T/3 PCF8574T SO16 plastic small outline package; 16 leads; body width 7.5 mm SOT162-1
PCF8574AT/3 PCF8574AT
PCF8574TS/3 8574TS SSOP20 plastic shrink small outline package; 20 leads;
body width 4.4 mm
SOT266-1
PCF8574ATS/3 8574A
Table 2. Ordering optionsPCF8574P PCF8574P ,112 DIP16 Standard marking IC’s tube - DSC bulk pack
1000 Tamb= 40 C to +85C
PCF8574AP PCF8574AP ,112 DIP16 Standard marking IC’s tube - DSC bulk pack
1000 Tamb= 40 C to +85C
PCF8574T/3 PCF8574T/3,512 SO16 Standard marking
* tube dry pack
1920 Tamb= 40 C to +85C
PCF8574T/3,518 SO16 Reel 13” Q1/T1
*standard mark SMD dry pack
1000 Tamb= 40 C to +85C
PCF8574AT/3 PCF8574AT/3,512 SO16 Standard marking
* tube dry pack
1920 Tamb= 40 C to +85C
PCF8574AT/3,518 SO16 Reel 13” Q1/T1
*standard mark SMD dry pack
1000 Tamb= 40 C to +85C
NXP Semiconductors PCF8574; PCF8574A
Remote 8-bit I/O expander for I2 C-bus with interrupt
5. Block diagramPCF8574TS/3 PCF8574TS/3,112 SSOP20 Standard marking IC’s tube - DSC bulk pack
1350 Tamb= 40 C to +85C
PCF8574TS/3,118 SSOP20 Reel 13” Q1/T1
*standard mark SMD
2500 Tamb= 40 C to +85C
PCF8574ATS/3 PCF8574ATS/3,118 SSOP20 Reel 13” Q1/T1
*standard mark SMD
2500 Tamb= 40 C to +85C
Table 2. Ordering options …continued
NXP Semiconductors PCF8574; PCF8574A
Remote 8-bit I/O expander for I2 C-bus with interrupt
6. Pinning information
6.1 Pinning
6.2 Pin description
Table 3. Pin description 1 6 address input 0 2 7 address input 1 3 9 address input 2 4 10 quasi-bidirectional I/O 0 5 11 quasi-bidirectional I/O 1 6 12 quasi-bidirectional I/O 2 7 14 quasi-bidirectional I/O 3
VSS 8 15 supply ground 9 16 quasi-bidirectional I/O 4 10 17 quasi-bidirectional I/O 5 11 19 quasi-bidirectional I/O 6 12 20 quasi-bidirectional I/O 7
INT 13 1 interrupt output (active LOW)
SCL 14 2 serial clock line
SDA 15 4 serial data line 5 supply voltage 3, 8, 13, 18 not connected
NXP Semiconductors PCF8574; PCF8574A
Remote 8-bit I/O expander for I2 C-bus with interrupt
7. Functional descriptionRefer to Figure 1 “Block diagram”.
7.1 Device addressFollowing a START condition, the bus master must send the address of the slave it is
accessing and the operation it wants to perform (read or write). The address format of the
PCF8574/74A is shown in Figure 6. Slave address pins A2, A1 and A0 are held HIGH or
LOW to choose one of eight slave addresses. To conserve power, no internal pull-up
resistors are incorporated on A2, A1 or A0, so they must be externally held HIGH or LOW.
The address pins (A2, A1, A0) can connect to VDD or VSS directly or through resistors.
The last bit of the first byte defines the operation to be performed. When set to logic 1 a
read is selected, while a logic 0 selects a write operation (write operation is shown in
Figure6).
7.1.1 Address mapsThe PCF8574 and PCF8574A are functionally the same, but have a different fixed portion
(A6 to A3) of the slave address. This allows eight of the PCF8574 and eight of the
PCF8574A to be on the same I2 C-bus without address conflict.
Table 4. PCF8574 address map
