PCA9554 查看數據表（PDF） - Philips Electronics
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PCA9554 Datasheet PDF : 20 Pages
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Philips Semiconductors
8-bit I2C and SMBus I/O port with interrupt
Product data sheet
PCA9554/PCA9554A
FEATURES
• Operating power supply voltage range of 2.3 to 5.5 V
• 5 V tolerant I/Os
• Polarity inversion register
• Active-LOW interrupt output
• Low stand-by current
• Noise filter on SCL/SDA inputs
• No glitch on power-up
• Internal power-on reset
• 8 I/O pins which default to 8 inputs
• 0 to 400 kHz clock frequency
• ESD protection exceeds 2000 V HBM per JESD22-A114,
200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
• Latch-up testing is done to JESDEC Standard JESD78 which
exceeds 100 mA
• Six packages offered: DIP16, SO16, SSOP16, SSOP20,
TSSOP16, and HVQFN16
DESCRIPTION
The PCA9554 and PCA9554A are 16-pin CMOS devices that
provide 8 bits of General Purpose parallel Input/Output (GPIO)
expansion for I2C/SMBus applications and were developed to
enhance the Philips family of I@C I/O expanders. The improvements
include higher drive capability, 5V I/O tolerance, lower supply
current, individual I/O configuration, 400 kHz clock frequency, and
smaller packaging. I/O expanders provide a simple solution when
additional I/O is needed for ACPI power switches, sensors,
pushbuttons, LEDs, fans, etc.
The PCA9554/54A consist of an 8-bit Configuration register (Input or
Output selection); 8-bit Input register, 8-bit Output register and an
8-bit Polarity inversion register (Active-HIGH or Active-LOW
operation). The system master can enable the I/Os as either inputs
or outputs by writing to the I/O configuration bits. The data for each
Input or Output is kept in the corresponding Input or Output register.
The polarity of the read register can be inverted with the Polarity
Inversion Register. All registers can be read by the system master.
Although pin to pin and I2C address compatible with the PCF8574
series, software changes are required due to the enhancements and
are discussed in Application Note AN469.
The PCA9554/54A open-drain interrupt output is activated when any
input state differs from its corresponding input port register state and
is used to indicate to the system master that an input state has
changed. The power-on reset sets the registers to their default
values and initializes the device state machine.
Three hardware pins (A0, A1, A2) vary the fixed I2C address and
allow up to eight devices to share the same I2C/SMBus. The
PCA9554A is identical to the PCA9554 except that the fixed I2C
address is different allowing up to sixteen of these devices (eight of
each) on the same I2C/SMBus.
ORDERING INFORMATION
PACKAGES
TEMPERATURE
RANGE
ORDER CODE
TOPSIDE MARK
16-Pin Plastic DIP
16-Pin Plastic SO (wide)
16-Pin Plastic SSOP
20-Pin Plastic SSOP
16-Pin Plastic TSSOP
16-Pin Plastic HVQFN
–40 °C to +85 °C
–40 °C to +85 °C
–40 °C to +85 °C
–40 °C to +85 °C
–40 °C to +85 °C
–40 °C to +85 °C
PCA9554N
PCA9554D
PCA9554DB
PCA9554TS
PCA9554PW
PCA9554BS
PCA9554N
PCA9554D
9554DB
PCA9554
9554DH
9554
16-Pin Plastic DIP
–40 °C to +85 °C
PCA9554AN
PCA9554AN
16-Pin Plastic SO (wide)
–40 °C to +85 °C
PCA9554AD
PCA9554AD
16-Pin Plastic SSOP
–40 °C to +85 °C
PCA9554ADB
9554A
20-Pin Plastic SSOP
–40 °C to +85 °C
PCA9554ATS
PA9554A
16-Pin Plastic TSSOP
–40 °C to +85 °C
PCA9554APW
9554ADH
16-Pin Plastic HVQFN
–40 °C to +85 °C
PCA9554ABS
554A
Standard packing quantities and other packaging data are available at www.philipslogic.com/packaging.
I2C is a trademark of Philips Semiconductors Corporation.
SMBus as specified by the Smart Battery System Implementers Forum is a derivative of the Philips I2C patent.
DRAWING NUMBER
SOT38-1
SOT162-1
SOT338-1
SOT266-1
SOT403-1
SOT629-1
SOT38-1
SOT162-1
SOT338-1
SOT266-1
SOT403-1
SOT629-1
2004 Sep 30
2
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