PCA9553: 4-bit I2C-bus LED driver with programmable blink rates

The PCA9553 LED blinker blinks LEDs in I²C-bus and SMBus applications where it is necessary to limit bus traffic or free up the I²C-bus master's (MCU, MPU, DSP, chip set, etc.) timer. The uniqueness of this device is the internal oscillator with two programmable blink rates. To blink LEDs using normal I/O expanders like the PCF8574 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 I²C-bus and uses up one of the master's timers. The PCA9553 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 fixed I²C-bus addresses allowing operation of both on the same bus.

PCA9553: Product Block Diagram

sot096-1_3d

Data Sheets (1)

Name/Description	Modified Date
4-bit I2C-bus LED driver with programmable blink rates (REV 6.0) PDF (147.0 kB) PCA9553	29 Dec 2008

Application Notes (3)

Name/Description	Modified Date
PCA9500/PCA9501 provides simple card maintenance and control using I²C-bus (REV 1.0) PDF (90.0 kB) AN256	23 Mar 2009
Level shifting techniques in I2C-bus design (REV 1.0) PDF (52.0 kB) AN10441	20 Jun 2007
I2C Devices for LED Display Control (REV 1.0) PDF (1.0 MB) AN264	22 Jul 2002

Users Guides (5)

Name/Description	Modified Date
I2C-bus specification and user manual (REV 6.0) PDF (1.4 MB) UM10204	28 Apr 2014
I2C-bus specification and user manual (REV 5.0) PDF (1.6 MB) UM10204_JA	03 Apr 2013
PCA9633 demonstration board OM6282 (REV 1.0) PDF (337.0 kB) UM10317	15 Dec 2008
PCA9698 demonstration board OM6281 (REV 1.0) PDF (558.0 kB) UM10267	26 Sep 2008
I2C Demonstration Board 2005-1 Quick Start Guide (REV 1.0) PDF (261.0 kB) UM10206	13 Jun 2006

Brochures (4)

Name/Description	Modified Date
NXP® I2C-bus solutions 2014: Smart, simple solutions for the 12 most common design concerns (REV 1.0) PDF (3.5 MB) 75017540	01 Aug 2014
LED controllers: Voltage-switch drivers, constant-current drivers, and Flash LED drivers (REV 1.0) PDF (2.7 MB) 75017588	03 Jul 2014
Create smarter, more efficient white goods; An industry-leading portfolio of cost-effective, power-saving solutions for... (REV 1.0) PDF (1.1 MB) 75016543	01 Jun 2008
LED blinking with GPIO expansion; NXP® 2/4/8/16-bit I2C/SMBus LED blinkers PCA9550/51/52/53 (REV 1.0) PDF (219.0 kB) 75016021	01 Jun 2007

Package Information (3)

Name/Description	Modified Date
plastic thermal enhanced very thin small outline package; no leads; 8 terminals (REV 1.1) PDF (189.0 kB) SOT908-1	10 Jun 2016
plastic thin shrink small outline package; 8 leads; body width 3 mm (REV 1.0) PDF (240.0 kB) SOT505-1	08 Feb 2016
plastic small outline package; 8 leads; body width 3.9 mm (REV 1.0) PDF (244.0 kB) SOT96-1	08 Feb 2016

Packing (3)

Name/Description	Modified Date
HVSON8; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... (REV 2.0) PDF (271.0 kB) SOT908-1_118	19 Apr 2013
SO8; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering... (REV 2.0) PDF (232.0 kB) SOT96-1_118	19 Apr 2013
TSSOP8; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... (REV 1.0) PDF (214.0 kB) SOT505-1_118	15 Apr 2013

Reports or Presentations (1)

Name/Description	Modified Date
design_con_2003_tecforum_i2c_b_1 (REV 0.1) PDF (4.2 MB) DESIGN_CON_2003_TECFORUM_I2C_B_1	27 Jan 2003

Supporting Information (4)

Name/Description	Modified Date
Reflow Soldering Profile (REV 1.0) PDF (34.0 kB) REFLOW_SOLDERING_PROFILE	30 Sep 2013
Wave Soldering Profile (REV 1.0) PDF (20.0 kB) WAVE_SOLDERING_PROFILE	30 Sep 2013
Footprint for reflow soldering (REV 1.0) PDF (9.0 kB) SO-SOJ-REFLOW	08 Oct 2009
Footprint for wave soldering (REV 1.0) PDF (8.0 kB) SO-SOJ-WAVE	08 Oct 2009

IBIS Model

PCA9553 IBIS model (REV 1.0) ZIP PCA9553_1 9/2/2014

Ordering Information

Product	Status	Package version	Operating Temperature (Cel)	PWMs	I2C-bus (kHz)	Operating voltage (VDC)	Max Sink Current per bit (mA)	No of Addresses	Max Sink Current, per package (mA)	Number of bits
PCA9553TK	Active	SOT908-1	-40~85	2 (40 Hz to 6.4 sec)	400	2.3~5.5	25	1	100	4

Package Information

Product ID	Outline Version	Reflow/Wave Soldering	Packing	Product Status	Part NumberOrdering code(12NC)	Marking	Chemical Content	LeadFree Conversion Date	IFR(FIT)	MTBF(hour)	MSL	MSL LF
PCA9553TK	SOT908-1		Reel 13" Q1/T1	Active	PCA9553TK,118 (9352 821 58118)	P53/1	PCA9553TK	Always Pb-free	2.0	5E8	1	1
PCA9553D/01	SOT96-1	SO-SOJ-REFLOW SO-SOJ-WAVE SO-SOJ-REFLOW SO-SOJ-WAVE	Reel 13" Q1/T1	Active	PCA9553D/01,118 (9352 728 25118)	9553/1	PCA9553D/01	week 5, 2005	2.0	5E8	1	1
PCA9553D/01	SOT96-1	SO-SOJ-REFLOW SO-SOJ-WAVE SO-SOJ-REFLOW SO-SOJ-WAVE	Bulk Pack	Active	PCA9553D/01,112 (9352 728 25112)	9553/1	PCA9553D/01	week 5, 2005	2.0	5E8	1	1
PCA9553D/02	SOT96-1	SO-SOJ-REFLOW SO-SOJ-WAVE SO-SOJ-REFLOW SO-SOJ-WAVE	Bulk Pack	Withdrawn	PCA9553D/02,112 (9352 728 27112)	9553/2		week 5, 2005	2.0	5E8	1	1
PCA9553DP/01	SOT505-1	Reflow_Soldering_Profile	Reel 13" Q1/T1	Active	PCA9553DP/01,118 (9352 728 26118)	P53/1	PCA9553DP/01	week 12, 2005	2.0	5E8	1	1
PCA9553DP/02	SOT505-1	Reflow_Soldering_Profile	Reel 13" Q1/T1	Active	PCA9553DP/02,118 (9352 728 28118)	P53/2	PCA9553DP/02	week 12, 2005	2.0	5E8	1	1