PCA9553 Philips Semiconductors, PCA9553 Datasheet - Page 2

• Manufacturer Part Number: PCA9553
• Description: 4-bit I2C LED driver with programmable blink rates
• Manufacturer: Philips Semiconductors

FEATURES
DESCRIPTION
The PCA9553 LED Blinker blinks LEDs in I
applications where it is necessary to limit bus traffic or free up the
I
of this device is the internal oscillator with two programmable blink
rates. To blink LEDs using normal I/O Expanders like the PCF8574
ORDERING INFORMATION
Standard packing quantities and other packaging data are available at www.standardproducts.philips.com/packaging.
I
2
2
Philips Semiconductors
8-Pin Plastic TSSOP (MSOP)
8-Pin Plastic TSSOP (MSOP)
2004 Oct 01
C Master’s (MCU, MPU, DSP, chipset, etc.) timer. The uniqueness
C is a trademark of Philips Semiconductors Corporation.
4 LED drivers (on, off, flashing at a programmable rate)
2 selectable, fully programmable blink rates (frequency and duty
cycle) between 0.172 Hz and 44 Hz (5.82 and 0.023 seconds)
Input/outputs not used as LED drivers can be used as regular
GPIOs
Internal oscillator requires no external components
I
Internal power-on reset
Noise filter on SCL/SDA inputs
4 open drain outputs directly drive LEDs to 25 mA
Controlled edge rates to minimize ground bounce
No glitch on power-up
Supports hot insertion
Low stand-by current
Operating power supply voltage range of 2.3 V to 5.5 V
0 to 400 kHz clock frequency
ESD protection exceeds 2000 V HBM per JESD22-A114,
150 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
Latch-up testing is done to JEDEC Standard JESD78 which
exceeds 100 mA
Packages offered: SO8, TSSOP8 (MSOP8)
4-bit I
programmable blink rates
2
C-businterface logic compatible with SMBus
8-Pin Plastic SO
8-Pin Plastic SO
PACKAGES
2
C LED driver with
TEMPERATURE RANGE
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
2
C and SMBus
PCA9553DP/01
PCA9553DP/02
ORDER CODE
PCA9553D/01
PCA9553D/02
2
fixed I
or PCA9554, the bus master must send repeated commands to turn
the LED on and off. This greatly increases the amount of traffic on
the I
LED Blinker instead requires only the initial set-up command to
program BLINK RATE 1 and BLINK RATE 2 (i.e., the frequency and
duty cycle). From then on, only one command from the bus master
is required to turn each individual open drain output ON, OFF, or to
cycle at BLINK RATE 1 or BLINK RATE 2. Maximum output sink
current is 25 mA per bit and 100 mA per package.
Any bits not used for controlling the LEDs can be used for General
Purpose Parallel Input/Output (GPIO) expansion.
Power-On Reset (POR) initializes the registers to their default state,
all zeroes, causing the bits to be set HIGH (LED off).
Due to pin limitations, the PCA9553 is not featured with hardware
address pins. The PCA9553/01 and the PCA9553/02 have different
PIN CONFIGURATION
PIN DESCRIPTION
NUMBER
PIN
2
C-bus and uses up one of the master’s timers. The PCA9553
1
2
3
4
5
6
7
8
2
C-bus addresses allowing operation of both on the same bus.
TOPSIDE MARK
LED1
LED2
LED0
SYMBOL
V
Figure 1. Pin configuration
SS
LED0
LED1
LED2
LED3
SDA
SCL
V
V
P9553/1
P9553/2
DD
SS
P53/1
P53/2
1
2
3
4
SW01035
LED driver 0
LED driver 1
LED driver 2
Supply ground
LED driver 3
Serial clock line
Serial data line
Supply voltage
8
7
6
5
DRAWING NUMBER
V
SDA
SCL
LED3
DD
FUNCTION
SOT505-1
SOT505-1
Product data sheet
PCA9553
SOT96-1
SOT96-1