PCA9501D - Brand New PHI I/O Expanders
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Description
The PCA9501 is an 8-bit I/O expander with an on-board 2-kbit EEPROM. It has eight quasi bidirectional data pins that can be assigned as inputs or outputs. The I/O configuration bits are written by the system master in the same way as for the PCF8574. The data for each input or output is stored in the corresponding register. The PCA9501 also includes an EEPROM that can be used to store error codes or board manufacturing data. It has an active-low open-drain interrupt output that is activated when the input state differs from its corresponding input port register state. The PCA9501 has six address pins with internal pull-up resistors, allowing up to 64 devices to share the common two-wire I2C software protocol serial data bus. It supports hot insertion for usage in removable cards on backplane systems.
Specifications and features
- 8 general purpose input/output expander/collector
- Replacement for PCF8574 with integrated 2-kbit EEPROM
- Internal 256 × 8 EEPROM
- Self-timed write cycle (5 ms typ)
- 16 byte page write operation
- I2C and SMBus interface logic
- Internal power-on reset
- Noise filter on SCL/SDA inputs
- Active low interrupt output
- 6 address pins allowing up to 64 devices on the I2C/SMBus
- No glitch on power-up
- Supports hot insertion
- Power-up with all channels configured as inputs
- Low standby current
- Operating power supply voltage range of 2.5 V to 3.6 V
- 5 V tolerant inputs/outputs
- 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
- Packages offered: SO20, TSSOP20, HVQFN20Application Scenarios
This PCA9501 can be used in various applications such as monitoring board level status, activating indicator devices like LEDs, storing error codes or board manufacturing data for diagnostic purposes, and facilitating usage in removable cards on backplane systems.
Comparison
Advantages:
- Easily expand the I/O capabilities of a system
- Integrated EEPROM for storing data
- Supports hot insertion for easy usage
- Wide operating power supply voltage range
- ESD protection exceeds industry standards
- Low standby current for energy efficiency
- Multiple package options available for different board designs
Disadvantages:
- Requires additional software to read/write data from/to the EEPROM
- Limited to 8-bit I/O expansion
- Limited to 64 devices on the I2C/SMBus bus
- May require additional circuitry for proper noise filtering -
Similar parts: 678 , Click to view
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Datasheet
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Shopping guide
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Popular parts of the same kind
- Datasheet: Download PCA9501D
- Chipdatas Part: CD93-PCA9501D
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/06/12 23:56 +0800
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- Full Refund if you don't receive your order
- Full or Partial Refund , If the item is not as described
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