PCA9500PW

PCA9500 2 8-bit I C-bus and SMBus I/O port with 2-kbit EEPROM Rev. 04 15 April 2009 Product data sheet 1. General description The PCA9500 is an 8-bit I/O expander with an on-board 2-kbit EEPROM. The I/O expander s eight quasi-bidirectional data pins can be independently assigned as inputs or outputs to monitor board level status or activate indicator devices such as LEDs. The system master writes to the I/O conguration bits in the same way as for the PCF8574. The data for each input or output is kept in the corresponding Input or Output register. The system master can read all registers. The EEPROM can be used to store error codes or board manufacturing data for read-back by application software for diagnostic purposes and is included in the I/O expander package. The PCA9500 has 3 address pins with internal pull-up resistors allowing up to 8 devices to 2 2 share the common two-wire I C software protocol serial data bus. The xed GPIO I C-bus 2 address is the same as the PCF8574 and the xed EEPROM I C-bus address is the same as the PCF8582C-2, so the PCA9500 appears as two separate devices to the bus master. The PCA9500 supports hot insertion to facilitate usage in removable cards on backplane systems. The PCA9501 is an alternative to the functionally similar PCA9500 for systems where a 2 higher number of devices are required to share the same I C-bus or an interrupt output is required. 2. Features n 8 general purpose input/output expander/collector n Drop-in replacement for PCF8574 with integrated 2-kbit EEPROM n Internal 256 8 EEPROM n Self timed write cycle n 4 byte page write operation 2 n I C-bus and SMBus interface logic n Internal power-on reset n Noise lter on SCL/SDA inputs 2 n 3 address pins allowing up to 8 devices on the I C-bus/SMBus n No glitch on power-up n Supports hot insertion n Power-up with all channels congured as inputs n Low standby current n Operating power supply voltage range of 2.5 V to 3.6 VPCA9500 NXP Semiconductors 2 8-bit I C-bus and SMBus I/O port with 2-kbit EEPROM n 5 V tolerant inputs/outputs n 0 Hz to 400 kHz clock frequency n ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101 n Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA n Packages offered: SO16, TSSOP16, HVQFN16 3. Applications n Board version tracking and conguration n Board health monitoring and status reporting n Multi-card systems in telecommunications, networking, and base station infrastructure equipment n Field recall and troubleshooting functions for installed boards n General-purpose integrated I/O with memory n Drop-in replacement for PCF8574 with integrated 2-kbit EEPROM n Bus master sees GPIO and EEPROM as two separate devices n Three hardware address pins allow up to 8 PCA9500s to be located in the same 2 I C-bus/SMBus 4. Ordering information Table 1. Ordering information Type number Package Name Description Version PCA9500D SO16 plastic small outline package 16 leads SOT162-1 body width 7.5 mm PCA9500PW TSSOP16 plastic thin shrink small outline package 16 leads SOT403-1 body width 4.4 mm PCA9500BS HVQFN16 plastic thermal enhanced very thin quad at package SOT629-1 no leads 16 terminals body 4 4 0.85 mm 4.1 Ordering options Table 2. Ordering options Type number Topside mark Temperature range PCA9500D PCA9500D - 40 C to +85 C PCA9500PW PCA9500 - 40 C to +85 C PCA9500BS 9500 - 40 C to +85 C PCA9500 4 NXP B.V. 2009. All rights reserved. Product data sheet Rev. 04 15 April 2009 2 of 26