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Updated at 17/06/2025 10:30:15(UTC+8)
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Description
- Overview
- The PCA9552 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 PCA9552 LED blinker instead requires only the initial setup command to program BLINK RATE 1 and BLINK RATE 2 (that is, the frequency and duty cycle) for each individual output. 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 200 mA per package.
- Any bits not used for controlling the LEDs can be used for General Purpose Parallel Input/Output (GPIO) expansion.
- The active LOW hardware reset pin (RESET) and Power-On Reset (POR) initializes the registers to their default state, all zeroes, causing the bits to be set HIGH (LED off).
- Three hardware address pins on the PCA9552 allow eight devices to operate on the same bus.
- MoreLess
- ## Features
- * 16 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 seconds and 0.023 seconds)
- * Input/outputs not used as LED drivers can be used as regular GPIOs
- * Internal oscillator requires no external components
- * I²C-bus interface logic compatible with SMBus
- * Internal power-on reset
- * Noise filter on SCL/SDA inputs
- * Active LOW reset input
- * 16 open-drain outputs directly drive LEDs to 25 mA
- * Edge rate control on outputs
- * No glitch on power-up
- * Supports hot insertion
- * Low standby current
- * Operating power supply voltage range of 2.3 V to 5.5 V
- * 0 Hz 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: SO24, TSSOP24, HVQFN24
- ## Features
PCA9552PW Specifications
| Attribute | Attribute Value |
|---|---|
| Datasheet | Datasheet |
| 3D Model | 3D Model |
| Mounting Style | Surface Mount |
| Number of Pins | 24 Pin |
| Case/Package | TSSOP |
| Supply Voltage (DC) | 5.50V (max) |
| Number of Outputs | 16 Output |
| Output Voltage | ≤6.00 V |
| Supply Current | 550 mA |
| Power Dissipation | 400 W |
| Output Current (Max) | 25 mA |
| Operating Temperature (Max) | 85 ℃ |
| Operating Temperature (Min) | -40 ℃ |
| Power Dissipation (Max) | 400 mW |
| Show | |
| Product Lifecycle Status | Unknown |
| Packaging | Bulk |
| RoHS | RoHS Compliant |
| Lead-Free Status | Lead Free |
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- - Carefully inspected and packed by ManyChip warehouse - Vacuum packaging - Anti-static packaging - Shockproof foam
- The terms here are for reference only, the actual terms are subject to the sales quotation. - Please confirm product specifications when ordering. - MOQ refers to the minimum order quantity required to purchase each part. - If you have special ordering instructions, please indicate them on the ordering page. - Inspection (PSI) will be performed prior to shipment.
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