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.
| Type number | Orderable part number | Ordering code (12NC) | Product status | Package | Packing | Marking | ECCN |
|---|---|---|---|---|---|---|---|
| PCA9553D/01 | PCA9553D/01,112 | 9352 728 25112 | Volume production | SOT96 | Tube | Standard Marking | |
| PCA9553D/01 | PCA9553D/01,118 | 9352 728 25118 | Volume production | SOT96 | Reel Pack, SMD, 13" | Standard Marking | |
| PCA9553D/02 | PCA9553D/02,112 | 9352 728 27112 | Volume production | SOT96 | Tube | Standard Marking | |
| PCA9553D/02 | PCA9553D/02,118 | 9352 728 27118 | Volume production | SOT96 | Reel Pack, SMD, 13" | Standard Marking | |
| PCA9553DP/01 | PCA9553DP/01,118 | 9352 728 26118 | Volume production | SOT505 | Reel Pack, SMD, 13" | Standard Marking | |
| PCA9553DP/02 | PCA9553DP/02,118 | 9352 728 28118 | Volume production | SOT505 | Reel Pack, SMD, 13" | Standard Marking | |
| PCA9553TK | PCA9553TK,118 | 9352 821 58118 | Volume production | SOT908-1
(HVSON8) | Reel Pack, SMD, 13" | Standard Marking | |
| PCA9553TK/02 | PCA9553TK/02,118 | 9352 868 81118 | Volume production | SOT908-1
(HVSON8) | Reel Pack, SMD, 13" | Standard Marking |
| Type number | Orderable part number | Chemical content | RoHS | Leadfree Conversion date | RHF | IRF (FIT) | MTBF (hours) | MSL |
|---|---|---|---|---|---|---|---|---|
| PCA9553D/01 | PCA9553D/01,112 | PCA9553D_01 |
| week 5, 2005 | ||||
| PCA9553D/01 | PCA9553D/01,118 | PCA9553D_01 |
| week 5, 2005 | ||||
| PCA9553D/02 | PCA9553D/02,112 | PCA9553D_02 |
| week 5, 2005 | ||||
| PCA9553D/02 | PCA9553D/02,118 | PCA9553D_02 |
| week 5, 2005 | ||||
| PCA9553DP/01 | PCA9553DP/01,118 | PCA9553DP_01 |
| week 12, 2005 | ||||
| PCA9553DP/02 | PCA9553DP/02,118 | PCA9553DP_02 |
| week 12, 2005 | ||||
| PCA9553TK | PCA9553TK,118 | PCA9553TK |
| Always Pb-free | ||||
| PCA9553TK/02 | PCA9553TK/02,118 | PCA9553TK_02 |
| Always Pb-free |
| Type number | Ordering code(12NC) | Orderable part number | Indicative price/unit($) | Region | Distributor | In stock | Order quantity | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|---|---|
| PCA9553D/01 | 9352 728 25112 | PCA9553D/01,112 | 1.6400 | NA | ARROW ELECTRONICS | 1,750 | 11/6/2009 | Buy online | not available | |
| NA | DIGI-KEY CORPORATION | 1,616 | 11/7/2009 | Buy online | ||||||
| NA | MOUSER ELECTRONICS | 1,740 | 11/7/2009 | Buy online | ||||||
| PCA9553D/01 | 9352 728 25118 | PCA9553D/01,118 | 1.0100 | NA | FUTURE ELECTRONICS | 1,965 | 11/7/2009 | Buy online | not available | |
| PCA9553D/02 | 9352 728 27112 | PCA9553D/02,112 | Order samples | |||||||
| PCA9553D/02 | 9352 728 27118 | PCA9553D/02,118 | not available | |||||||
| PCA9553DP/01 | 9352 728 26118 | PCA9553DP/01,118 | 0.9600 | NA | ARROW ELECTRONICS | 5,000 | 11/6/2009 | Buy online | Order samples | |
| NA | DIGI-KEY CORPORATION | 2,680 | 11/7/2009 | Buy online | ||||||
| PCA9553DP/02 | 9352 728 28118 | PCA9553DP/02,118 | NA | FUTURE ELECTRONICS | 100 | 11/7/2009 | Buy online | Order samples | ||
| PCA9553TK | 9352 821 58118 | PCA9553TK,118 | ASIA | WPI | 1,850 | 1 | 11/07/2009 | Buy online | Order samples | |
| PCA9553TK/02 | 9352 868 81118 | PCA9553TK/02,118 | not available |
Application Notes
Support Documents
| Type number | Package | Operating temp.(Cel) | PWMs | # of Bits | I²C-bus(kHz) | Operating voltage(VDC) | Max Sink Current per bit(mA) | # of Addresses | Max Sink Current per package(mA) |
|---|---|---|---|---|---|---|---|---|---|
| PCA9553D/01 | SOT96
| -40~85 | 2 (40 Hz to 6.4 sec) | 4 | 400 | 2.3~5.5 | 25 | 1 | 100 |
| PCA9553D/02 | SOT96
| -40~85 | 2 (40 Hz to 6.4 sec) | 4 | 400 | 2.3~5.5 | 25 | 1 | 100 |
| PCA9553DP/01 | SOT505
| -40~85 | 2 (40 Hz to 6.4 sec) | 4 | 400 | 2.3~5.5 | 25 | 1 | 100 |
| PCA9553DP/02 | SOT505
| -40~85 | 2 (40 Hz to 6.4 sec) | 4 | 400 | 2.3~5.5 | 25 | 1 | 100 |
| PCA9553TK | SOT908-1
(HVSON8) | -40~85 | 2 (40 Hz to 6.4 sec) | 4 | 400 | 2.3~5.5 | 25 | 1 | 100 |
| PCA9553TK/02 | SOT908-1
(HVSON8) | -40~85 | 2 (40 Hz to 6.4 sec) | 4 | 400 | 2.3~5.5 | 25 | 1 | 100 |