Datasheet
Table Of Contents
- 1. General description
- 2. Features and benefits
- 3. Applications
- 4. Ordering information
- 5. Block diagram
- 6. Pinning information
- 7. Functional description
- 7.1 Device address
- 7.2 Command register
- 7.3 Register definitions
- 7.4 Writing to port registers
- 7.5 Reading the port registers
- 7.5.1 Register 0 - Input port register
- 7.5.2 Register 1 - Polarity inversion register
- 7.5.3 Register 2 - Bus-hold/pull-up/pull-down enable register
- 7.5.4 Register 3 - Pull-up/pull-down selector register
- 7.5.5 Register 4 - Configuration register
- 7.5.6 Register 5 - Output port register
- 7.5.7 Register 6 - Interrupt mask register
- 7.5.8 Register 7 - Interrupt status register
- 7.6 Power-on reset
- 7.7 RESET input
- 7.8 Software reset
- 7.9 Interrupt output (INT)
- 7.10 Standby
- 8. Characteristics of the I2C-bus
- 9. Bus transactions
- 10. Application design-in information
- 11. Limiting values
- 12. Static characteristics
- 13. Dynamic characteristics
- 14. Test information
- 15. Package outline
- 16. Handling information
- 17. Soldering of SMD packages
- 18. Abbreviations
- 19. Revision history
- 20. Legal information
- 21. Contact information
- 22. Contents
PCA9574 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 5 — 25 September 2014 23 of 32
NXP Semiconductors
PCA9574
8-bit I
2
C-bus and SMBus, level translating, low voltage GPIO
14. Test information
R
L
= load resistance.
C
L
= load capacitance includes jig and probe capacitance.
R
T
= termination resistance should be equal to the output impedance Z
o
of the pulse generators.
(1) For SDA, no 500 pull-down.
Fig 20. Test circuitry for switching times
PULSE
GENERATOR
V
O
C
L
50 pF
R
L
500 Ω
002aad582
R
T
V
I
V
DD
DUT
2V
DD
open
V
SS
500 Ω
(1)